platform/kernel/linux-starfive.git
5 years agokvm: selftests: hide vcpu_setup in processor code
Paolo Bonzini [Tue, 4 Jun 2019 17:13:46 +0000 (19:13 +0200)]
kvm: selftests: hide vcpu_setup in processor code

This removes the processor-dependent arguments from vm_vcpu_add.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: ucall improvements
Andrew Jones [Mon, 27 May 2019 12:30:06 +0000 (14:30 +0200)]
kvm: selftests: ucall improvements

Make sure we complete the I/O after determining we have a ucall,
which is I/O. Also allow the *uc parameter to optionally be NULL.
It's quite possible that a test case will only care about the
return value, like for example when looping on a check for
UCALL_DONE.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: X86: Emulate MSR_IA32_MISC_ENABLE MWAIT bit
Wanpeng Li [Tue, 21 May 2019 06:06:54 +0000 (14:06 +0800)]
KVM: X86: Emulate MSR_IA32_MISC_ENABLE MWAIT bit

MSR IA32_MISC_ENABLE bit 18, according to SDM:

| When this bit is set to 0, the MONITOR feature flag is not set (CPUID.01H:ECX[bit 3] = 0).
| This indicates that MONITOR/MWAIT are not supported.
|
| Software attempts to execute MONITOR/MWAIT will cause #UD when this bit is 0.
|
| When this bit is set to 1 (default), MONITOR/MWAIT are supported (CPUID.01H:ECX[bit 3] = 1).

The CPUID.01H:ECX[bit 3] ought to mirror the value of the MSR bit,
CPUID.01H:ECX[bit 3] is a better guard than kvm_mwait_in_guest().
kvm_mwait_in_guest() affects the behavior of MONITOR/MWAIT, not its
guest visibility.

This patch implements toggling of the CPUID bit based on guest writes
to the MSR.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
[Fixes for backwards compatibility - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: X86: Provide a capability to disable cstate msr read intercepts
Wanpeng Li [Tue, 21 May 2019 06:06:53 +0000 (14:06 +0800)]
KVM: X86: Provide a capability to disable cstate msr read intercepts

Allow guest reads CORE cstate when exposing host CPU power management capabilities
to the guest. PKG cstate is restricted to avoid a guest to get the whole package
information in multi-tenant scenario.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: Documentation: Add disable pause exits to KVM_CAP_X86_DISABLE_EXITS
Wanpeng Li [Tue, 21 May 2019 06:06:52 +0000 (14:06 +0800)]
KVM: Documentation: Add disable pause exits to KVM_CAP_X86_DISABLE_EXITS

Commit b31c114b (KVM: X86: Provide a capability to disable PAUSE intercepts)
forgot to add the KVM_X86_DISABLE_EXITS_PAUSE into api doc. This patch adds
it.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86: refine kvm_get_arch_capabilities()
Xiaoyao Li [Fri, 19 Apr 2019 02:16:24 +0000 (10:16 +0800)]
kvm: x86: refine kvm_get_arch_capabilities()

1. Using X86_FEATURE_ARCH_CAPABILITIES to enumerate the existence of
MSR_IA32_ARCH_CAPABILITIES to avoid using rdmsrl_safe().

2. Since kvm_get_arch_capabilities() is only used in this file, making
it static.

Signed-off-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: Directly return result from kvm_arch_check_processor_compat()
Sean Christopherson [Sat, 20 Apr 2019 05:18:17 +0000 (22:18 -0700)]
KVM: Directly return result from kvm_arch_check_processor_compat()

Add a wrapper to invoke kvm_arch_check_processor_compat() so that the
boilerplate ugliness of checking virtualization support on all CPUs is
hidden from the arch specific code.  x86's implementation in particular
is quite heinous, as it unnecessarily propagates the out-param pattern
into kvm_x86_ops.

While the x86 specific issue could be resolved solely by changing
kvm_x86_ops, make the change for all architectures as returning a value
directly is prettier and technically more robust, e.g. s390 doesn't set
the out param, which could lead to subtle breakage in the (highly
unlikely) scenario where the out-param was not pre-initialized by the
caller.

Opportunistically annotate svm_check_processor_compat() with __init.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: svm/avic: Do not send AVIC doorbell to self
Suthikulpanit, Suravee [Fri, 3 May 2019 13:38:53 +0000 (06:38 -0700)]
kvm: svm/avic: Do not send AVIC doorbell to self

AVIC doorbell is used to notify a running vCPU that interrupts
has been injected into the vCPU AVIC backing page. Current logic
checks only if a VCPU is running before sending a doorbell.
However, the doorbell is not necessary if the destination
CPU is itself.

Add logic to check currently running CPU before sending doorbell.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: LAPIC: Optimize timer latency further
Wanpeng Li [Mon, 20 May 2019 08:18:09 +0000 (16:18 +0800)]
KVM: LAPIC: Optimize timer latency further

Advance lapic timer tries to hidden the hypervisor overhead between the
host emulated timer fires and the guest awares the timer is fired. However,
it just hidden the time between apic_timer_fn/handle_preemption_timer ->
wait_lapic_expire, instead of the real position of vmentry which is
mentioned in the orignial commit d0659d946be0 ("KVM: x86: add option to
advance tscdeadline hrtimer expiration"). There is 700+ cpu cycles between
the end of wait_lapic_expire and before world switch on my haswell desktop.

This patch tries to narrow the last gap(wait_lapic_expire -> world switch),
it takes the real overhead time between apic_timer_fn/handle_preemption_timer
and before world switch into consideration when adaptively tuning timer
advancement. The patch can reduce 40% latency (~1600+ cycles to ~1000+ cycles
on a haswell desktop) for kvm-unit-tests/tscdeadline_latency when testing
busy waits.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: LAPIC: Delay trace_kvm_wait_lapic_expire tracepoint to after vmexit
Wanpeng Li [Mon, 20 May 2019 08:18:08 +0000 (16:18 +0800)]
KVM: LAPIC: Delay trace_kvm_wait_lapic_expire tracepoint to after vmexit

wait_lapic_expire() call was moved above guest_enter_irqoff() because of
its tracepoint, which violated the RCU extended quiescent state invoked
by guest_enter_irqoff()[1][2]. This patch simply moves the tracepoint
below guest_exit_irqoff() in vcpu_enter_guest(). Snapshot the delta before
VM-Enter, but trace it after VM-Exit. This can help us to move
wait_lapic_expire() just before vmentry in the later patch.

[1] Commit 8b89fe1f6c43 ("kvm: x86: move tracepoints outside extended quiescent state")
[2] https://patchwork.kernel.org/patch/7821111/

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Liran Alon <liran.alon@oracle.com>
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
[Track whether wait_lapic_expire was called, and do not invoke the tracepoint
 if not. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: LAPIC: Extract adaptive tune timer advancement logic
Wanpeng Li [Mon, 20 May 2019 08:18:05 +0000 (16:18 +0800)]
KVM: LAPIC: Extract adaptive tune timer advancement logic

Extract adaptive tune timer advancement logic to a single function.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
[Rename new function. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM/nSVM: properly map nested VMCB
Vitaly Kuznetsov [Tue, 4 Jun 2019 16:09:39 +0000 (18:09 +0200)]
KVM/nSVM: properly map nested VMCB

Commit 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest
memory") broke nested SVM completely: kvm_vcpu_map()'s second parameter is
GFN so vmcb_gpa needs to be converted with gpa_to_gfn(), not the other way
around.

Fixes: 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest memory")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86: Fix reserved bits related calculation errors caused by MKTME
Kai Huang [Fri, 3 May 2019 10:08:53 +0000 (03:08 -0700)]
kvm: x86: Fix reserved bits related calculation errors caused by MKTME

Intel MKTME repurposes several high bits of physical address as 'keyID'
for memory encryption thus effectively reduces platform's maximum
physical address bits. Exactly how many bits are reduced is configured
by BIOS. To honor such HW behavior, the repurposed bits are reduced from
cpuinfo_x86->x86_phys_bits when MKTME is detected in CPU detection.
Similarly, AMD SME/SEV also reduces physical address bits for memory
encryption, and cpuinfo->x86_phys_bits is reduced too when SME/SEV is
detected, so for both MKTME and SME/SEV, boot_cpu_data.x86_phys_bits
doesn't hold physical address bits reported by CPUID anymore.

Currently KVM treats bits from boot_cpu_data.x86_phys_bits to 51 as
reserved bits, but it's not true anymore for MKTME, since MKTME treats
those reduced bits as 'keyID', but not reserved bits. Therefore
boot_cpu_data.x86_phys_bits cannot be used to calculate reserved bits
anymore, although we can still use it for AMD SME/SEV since SME/SEV
treats the reduced bits differently -- they are treated as reserved
bits, the same as other reserved bits in page table entity [1].

Fix by introducing a new 'shadow_phys_bits' variable in KVM x86 MMU code
to store the effective physical bits w/o reserved bits -- for MKTME,
it equals to physical address reported by CPUID, and for SME/SEV, it is
boot_cpu_data.x86_phys_bits.

Note that for the physical address bits reported to guest should remain
unchanged -- KVM should report physical address reported by CPUID to
guest, but not boot_cpu_data.x86_phys_bits. Because for Intel MKTME,
there's no harm if guest sets up 'keyID' bits in guest page table (since
MKTME only works at physical address level), and KVM doesn't even expose
MKTME to guest. Arguably, for AMD SME/SEV, guest is aware of SEV thus it
should adjust boot_cpu_data.x86_phys_bits when it detects SEV, therefore
KVM should still reports physcial address reported by CPUID to guest.

Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86: Move kvm_set_mmio_spte_mask() from x86.c to mmu.c
Kai Huang [Fri, 3 May 2019 10:08:52 +0000 (03:08 -0700)]
kvm: x86: Move kvm_set_mmio_spte_mask() from x86.c to mmu.c

As a prerequisite to fix several SPTE reserved bits related calculation
errors caused by MKTME, which requires kvm_set_mmio_spte_mask() to use
local static variable defined in mmu.c.

Also move call site of kvm_set_mmio_spte_mask() from kvm_arch_init() to
kvm_mmu_module_init() so that kvm_set_mmio_spte_mask() can be static.

Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoMerge tag 'kvm-s390-master-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Fri, 31 May 2019 22:49:02 +0000 (00:49 +0200)]
Merge tag 'kvm-s390-master-5.2-2' of git://git./linux/kernel/git/kvms390/linux into kvm-master

KVM: s390: Fixes

- fix compilation for !CONFIG_PCI
- fix the output of KVM_CAP_MAX_VCPU_ID

5 years agoMerge tag 'kvm-ppc-fixes-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Fri, 31 May 2019 22:48:45 +0000 (00:48 +0200)]
Merge tag 'kvm-ppc-fixes-5.2-1' of git://git./linux/kernel/git/paulus/powerpc into kvm-master

PPC KVM fixes for 5.2

- Several bug fixes for the new XIVE-native code.
- Replace kvm->lock by other mutexes in several places where we hold a
  vcpu mutex, to avoid lock order inversions.
- Fix a lockdep warning on guest entry for radix-mode guests.
- Fix a bug causing user-visible corruption of SPRG3 on the host.

5 years agoKVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry()
Suraj Jitindar Singh [Thu, 30 May 2019 02:17:18 +0000 (12:17 +1000)]
KVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry()

The sprgs are a set of 4 general purpose sprs provided for software use.
SPRG3 is special in that it can also be read from userspace. Thus it is
used on linux to store the cpu and numa id of the process to speed up
syscall access to this information.

This register is overwritten with the guest value on kvm guest entry,
and so needs to be restored on exit again. Thus restore the value on
the guest exit path in kvmhv_p9_guest_entry().

Cc: stable@vger.kernel.org # v4.20+
Fixes: 95a6432ce9038 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9
Paul Mackerras [Tue, 28 May 2019 05:01:59 +0000 (15:01 +1000)]
KVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9

Commit 3309bec85e60 ("KVM: PPC: Book3S HV: Fix lockdep warning when
entering the guest") moved calls to trace_hardirqs_{on,off} in the
entry path used for HPT guests.  Similar code exists in the new
streamlined entry path used for radix guests on POWER9.  This makes
the same change there, so as to avoid lockdep warnings such as this:

[  228.686461] DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
[  228.686480] WARNING: CPU: 116 PID: 3803 at ../kernel/locking/lockdep.c:4219 check_flags.part.23+0x21c/0x270
[  228.686544] Modules linked in: vhost_net vhost xt_CHECKSUM iptable_mangle xt_MASQUERADE iptable_nat nf_nat
+xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter
+ebtables ip6table_filter ip6_tables iptable_filter fuse kvm_hv kvm at24 ipmi_powernv regmap_i2c ipmi_devintf
+uio_pdrv_genirq ofpart ipmi_msghandler uio powernv_flash mtd ibmpowernv opal_prd ip_tables ext4 mbcache jbd2 btrfs
+zstd_decompress zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx libcrc32c xor
+raid6_pq raid1 raid0 ses sd_mod enclosure scsi_transport_sas ast i2c_opal i2c_algo_bit drm_kms_helper syscopyarea
+sysfillrect sysimgblt fb_sys_fops ttm drm i40e e1000e cxl aacraid tg3 drm_panel_orientation_quirks i2c_core
[  228.686859] CPU: 116 PID: 3803 Comm: qemu-system-ppc Kdump: loaded Not tainted 5.2.0-rc1-xive+ #42
[  228.686911] NIP:  c0000000001b394c LR: c0000000001b3948 CTR: c000000000bfad20
[  228.686963] REGS: c000200cdb50f570 TRAP: 0700   Not tainted  (5.2.0-rc1-xive+)
[  228.687001] MSR:  9000000002823033 <SF,HV,VEC,VSX,FP,ME,IR,DR,RI,LE>  CR: 48222222  XER: 20040000
[  228.687060] CFAR: c000000000116db0 IRQMASK: 1
[  228.687060] GPR00: c0000000001b3948 c000200cdb50f800 c0000000015e7600 000000000000002e
[  228.687060] GPR04: 0000000000000001 c0000000001c71a0 000000006e655f73 72727563284e4f5f
[  228.687060] GPR08: 0000200e60680000 0000000000000000 c000200cdb486180 0000000000000000
[  228.687060] GPR12: 0000000000002000 c000200fff61a680 0000000000000000 00007fffb75c0000
[  228.687060] GPR16: 0000000000000000 0000000000000000 c0000000017d6900 c000000001124900
[  228.687060] GPR20: 0000000000000074 c008000006916f68 0000000000000074 0000000000000074
[  228.687060] GPR24: ffffffffffffffff ffffffffffffffff 0000000000000003 c000200d4b600000
[  228.687060] GPR28: c000000001627e58 c000000001489908 c000000001627e58 c000000002304de0
[  228.687377] NIP [c0000000001b394c] check_flags.part.23+0x21c/0x270
[  228.687415] LR [c0000000001b3948] check_flags.part.23+0x218/0x270
[  228.687466] Call Trace:
[  228.687488] [c000200cdb50f800] [c0000000001b3948] check_flags.part.23+0x218/0x270 (unreliable)
[  228.687542] [c000200cdb50f870] [c0000000001b6548] lock_is_held_type+0x188/0x1c0
[  228.687595] [c000200cdb50f8d0] [c0000000001d939c] rcu_read_lock_sched_held+0xdc/0x100
[  228.687646] [c000200cdb50f900] [c0000000001dd704] rcu_note_context_switch+0x304/0x340
[  228.687701] [c000200cdb50f940] [c0080000068fcc58] kvmhv_run_single_vcpu+0xdb0/0x1120 [kvm_hv]
[  228.687756] [c000200cdb50fa20] [c0080000068fd5b0] kvmppc_vcpu_run_hv+0x5e8/0xe40 [kvm_hv]
[  228.687816] [c000200cdb50faf0] [c0080000071797dc] kvmppc_vcpu_run+0x34/0x48 [kvm]
[  228.687863] [c000200cdb50fb10] [c0080000071755dc] kvm_arch_vcpu_ioctl_run+0x244/0x420 [kvm]
[  228.687916] [c000200cdb50fba0] [c008000007165ccc] kvm_vcpu_ioctl+0x424/0x838 [kvm]
[  228.687957] [c000200cdb50fd10] [c000000000433a24] do_vfs_ioctl+0xd4/0xcd0
[  228.687995] [c000200cdb50fdb0] [c000000000434724] ksys_ioctl+0x104/0x120
[  228.688033] [c000200cdb50fe00] [c000000000434768] sys_ioctl+0x28/0x80
[  228.688072] [c000200cdb50fe20] [c00000000000b888] system_call+0x5c/0x70
[  228.688109] Instruction dump:
[  228.688142] 4bf6342d 60000000 0fe00000 e8010080 7c0803a6 4bfffe60 3c82ff87 3c62ff87
[  228.688196] 388472d0 3863d738 4bf63405 60000000 <0fe000004bffff4c 3c82ff87 3c62ff87
[  228.688251] irq event stamp: 205
[  228.688287] hardirqs last  enabled at (205): [<c0080000068fc1b4>] kvmhv_run_single_vcpu+0x30c/0x1120 [kvm_hv]
[  228.688344] hardirqs last disabled at (204): [<c0080000068fbff0>] kvmhv_run_single_vcpu+0x148/0x1120 [kvm_hv]
[  228.688412] softirqs last  enabled at (180): [<c000000000c0b2ac>] __do_softirq+0x4ac/0x5d4
[  228.688464] softirqs last disabled at (169): [<c000000000122aa8>] irq_exit+0x1f8/0x210
[  228.688513] ---[ end trace eb16f6260022a812 ]---
[  228.688548] possible reason: unannotated irqs-off.
[  228.688571] irq event stamp: 205
[  228.688607] hardirqs last  enabled at (205): [<c0080000068fc1b4>] kvmhv_run_single_vcpu+0x30c/0x1120 [kvm_hv]
[  228.688664] hardirqs last disabled at (204): [<c0080000068fbff0>] kvmhv_run_single_vcpu+0x148/0x1120 [kvm_hv]
[  228.688719] softirqs last  enabled at (180): [<c000000000c0b2ac>] __do_softirq+0x4ac/0x5d4
[  228.688758] softirqs last disabled at (169): [<c000000000122aa8>] irq_exit+0x1f8/0x210

Cc: stable@vger.kernel.org # v4.20+
Fixes: 95a6432ce903 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages
Cédric Le Goater [Tue, 28 May 2019 21:13:24 +0000 (23:13 +0200)]
KVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages

Under XIVE, the ESB pages of an interrupt are used for interrupt
management (EOI) and triggering. They are made available to guests
through a mapping of the XIVE KVM device.

When a device is passed-through, the passthru_irq helpers,
kvmppc_xive_set_mapped() and kvmppc_xive_clr_mapped(), clear the ESB
pages of the guest IRQ number being mapped and let the VM fault
handler repopulate with the correct page.

The ESB pages are mapped at offset 4 (KVM_XIVE_ESB_PAGE_OFFSET) in the
KVM device mapping. Unfortunately, this offset was not taken into
account when clearing the pages. This lead to issues with the
passthrough devices for which the interrupts were not functional under
some guest configuration (tg3 and single CPU) or in any configuration
(e1000e adapter).

Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots
Cédric Le Goater [Tue, 28 May 2019 12:17:16 +0000 (14:17 +0200)]
KVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots

According to Documentation/virtual/kvm/locking.txt, the srcu read lock
should be taken when accessing the memslots of the VM. The XIVE KVM
device needs to do so when configuring the page of the OS event queue
of vCPU for a given priority and when marking the same page dirty
before migration.

This avoids warnings such as :

[  208.224882] =============================
[  208.224884] WARNING: suspicious RCU usage
[  208.224889] 5.2.0-rc2-xive+ #47 Not tainted
[  208.224890] -----------------------------
[  208.224894] ../include/linux/kvm_host.h:633 suspicious rcu_dereference_check() usage!
[  208.224896]
               other info that might help us debug this:

[  208.224898]
               rcu_scheduler_active = 2, debug_locks = 1
[  208.224901] no locks held by qemu-system-ppc/3923.
[  208.224902]
               stack backtrace:
[  208.224907] CPU: 64 PID: 3923 Comm: qemu-system-ppc Kdump: loaded Not tainted 5.2.0-rc2-xive+ #47
[  208.224909] Call Trace:
[  208.224918] [c000200cdd98fa30] [c000000000be1934] dump_stack+0xe8/0x164 (unreliable)
[  208.224924] [c000200cdd98fa80] [c0000000001aec80] lockdep_rcu_suspicious+0x110/0x180
[  208.224935] [c000200cdd98fb00] [c0080000075933a0] gfn_to_memslot+0x1c8/0x200 [kvm]
[  208.224943] [c000200cdd98fb40] [c008000007599600] gfn_to_pfn+0x28/0x60 [kvm]
[  208.224951] [c000200cdd98fb70] [c008000007599658] gfn_to_page+0x20/0x40 [kvm]
[  208.224959] [c000200cdd98fb90] [c0080000075b495c] kvmppc_xive_native_set_attr+0x8b4/0x1480 [kvm]
[  208.224967] [c000200cdd98fca0] [c00800000759261c] kvm_device_ioctl_attr+0x64/0xb0 [kvm]
[  208.224974] [c000200cdd98fcf0] [c008000007592730] kvm_device_ioctl+0xc8/0x110 [kvm]
[  208.224979] [c000200cdd98fd10] [c000000000433a24] do_vfs_ioctl+0xd4/0xcd0
[  208.224981] [c000200cdd98fdb0] [c000000000434724] ksys_ioctl+0x104/0x120
[  208.224984] [c000200cdd98fe00] [c000000000434768] sys_ioctl+0x28/0x80
[  208.224988] [c000200cdd98fe20] [c00000000000b888] system_call+0x5c/0x70
legoater@boss01:~$

Fixes: 13ce3297c576 ("KVM: PPC: Book3S HV: XIVE: Add controls for the EQ configuration")
Fixes: e6714bd1671d ("KVM: PPC: Book3S HV: XIVE: Add a control to dirty the XIVE EQ pages")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts
Cédric Le Goater [Tue, 28 May 2019 12:17:15 +0000 (14:17 +0200)]
KVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts

The passthrough interrupts are defined at the host level and their IRQ
data should not be cleared unless specifically deconfigured (shutdown)
by the host. They differ from the IPI interrupts which are allocated
by the XIVE KVM device and reserved to the guest usage only.

This fixes a host crash when destroying a VM in which a PCI adapter
was passed-through. In this case, the interrupt is cleared and freed
by the KVM device and then shutdown by vfio at the host level.

[ 1007.360265] BUG: Kernel NULL pointer dereference at 0x00000d00
[ 1007.360285] Faulting instruction address: 0xc00000000009da34
[ 1007.360296] Oops: Kernel access of bad area, sig: 7 [#1]
[ 1007.360303] LE PAGE_SIZE=64K MMU=Radix MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV
[ 1007.360314] Modules linked in: vhost_net vhost iptable_mangle ipt_MASQUERADE iptable_nat nf_nat xt_conntrack nf_conntrack nf_defrag_ipv4 ipt_REJECT nf_reject_ipv4 tun bridge stp llc kvm_hv kvm xt_tcpudp iptable_filter squashfs fuse binfmt_misc vmx_crypto ib_iser rdma_cm iw_cm ib_cm libiscsi scsi_transport_iscsi nfsd ip_tables x_tables autofs4 btrfs zstd_decompress zstd_compress lzo_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq multipath mlx5_ib ib_uverbs ib_core crc32c_vpmsum mlx5_core
[ 1007.360425] CPU: 9 PID: 15576 Comm: CPU 18/KVM Kdump: loaded Not tainted 5.1.0-gad7e7d0ef #4
[ 1007.360454] NIP:  c00000000009da34 LR: c00000000009e50c CTR: c00000000009e5d0
[ 1007.360482] REGS: c000007f24ccf330 TRAP: 0300   Not tainted  (5.1.0-gad7e7d0ef)
[ 1007.360500] MSR:  900000000280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 24002484  XER: 00000000
[ 1007.360532] CFAR: c00000000009da10 DAR: 0000000000000d00 DSISR: 00080000 IRQMASK: 1
[ 1007.360532] GPR00: c00000000009e62c c000007f24ccf5c0 c000000001510600 c000007fe7f947c0
[ 1007.360532] GPR04: 0000000000000d00 0000000000000000 0000000000000000 c000005eff02d200
[ 1007.360532] GPR08: 0000000000400000 0000000000000000 0000000000000000 fffffffffffffffd
[ 1007.360532] GPR12: c00000000009e5d0 c000007fffff7b00 0000000000000031 000000012c345718
[ 1007.360532] GPR16: 0000000000000000 0000000000000008 0000000000418004 0000000000040100
[ 1007.360532] GPR20: 0000000000000000 0000000008430000 00000000003c0000 0000000000000027
[ 1007.360532] GPR24: 00000000000000ff 0000000000000000 00000000000000ff c000007faa90d98c
[ 1007.360532] GPR28: c000007faa90da40 00000000000fe040 ffffffffffffffff c000007fe7f947c0
[ 1007.360689] NIP [c00000000009da34] xive_esb_read+0x34/0x120
[ 1007.360706] LR [c00000000009e50c] xive_do_source_set_mask.part.0+0x2c/0x50
[ 1007.360732] Call Trace:
[ 1007.360738] [c000007f24ccf5c0] [c000000000a6383c] snooze_loop+0x15c/0x270 (unreliable)
[ 1007.360775] [c000007f24ccf5f0] [c00000000009e62c] xive_irq_shutdown+0x5c/0xe0
[ 1007.360795] [c000007f24ccf630] [c00000000019e4a0] irq_shutdown+0x60/0xe0
[ 1007.360813] [c000007f24ccf660] [c000000000198c44] __free_irq+0x3a4/0x420
[ 1007.360831] [c000007f24ccf700] [c000000000198dc8] free_irq+0x78/0xe0
[ 1007.360849] [c000007f24ccf730] [c00000000096c5a8] vfio_msi_set_vector_signal+0xa8/0x350
[ 1007.360878] [c000007f24ccf7f0] [c00000000096c938] vfio_msi_set_block+0xe8/0x1e0
[ 1007.360899] [c000007f24ccf850] [c00000000096cae0] vfio_msi_disable+0xb0/0x110
[ 1007.360912] [c000007f24ccf8a0] [c00000000096cd04] vfio_pci_set_msi_trigger+0x1c4/0x3d0
[ 1007.360922] [c000007f24ccf910] [c00000000096d910] vfio_pci_set_irqs_ioctl+0xa0/0x170
[ 1007.360941] [c000007f24ccf930] [c00000000096b400] vfio_pci_disable+0x80/0x5e0
[ 1007.360963] [c000007f24ccfa10] [c00000000096b9bc] vfio_pci_release+0x5c/0x90
[ 1007.360991] [c000007f24ccfa40] [c000000000963a9c] vfio_device_fops_release+0x3c/0x70
[ 1007.361012] [c000007f24ccfa70] [c0000000003b5668] __fput+0xc8/0x2b0
[ 1007.361040] [c000007f24ccfac0] [c0000000001409b0] task_work_run+0x140/0x1b0
[ 1007.361059] [c000007f24ccfb20] [c000000000118f8c] do_exit+0x3ac/0xd00
[ 1007.361076] [c000007f24ccfc00] [c0000000001199b0] do_group_exit+0x60/0x100
[ 1007.361094] [c000007f24ccfc40] [c00000000012b514] get_signal+0x1a4/0x8f0
[ 1007.361112] [c000007f24ccfd30] [c000000000021cc8] do_notify_resume+0x1a8/0x430
[ 1007.361141] [c000007f24ccfe20] [c00000000000e444] ret_from_except_lite+0x70/0x74
[ 1007.361159] Instruction dump:
[ 1007.361175] 38422c00 e9230000 712a0004 41820010 548a2036 7d442378 78840020 71290020
[ 1007.361194] 4082004c e9230010 7c892214 7c0004ac <e92400000c090000 4c00012c 792a0022

Cc: stable@vger.kernel.org # v4.12+
Fixes: 5af50993850a ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device
Cédric Le Goater [Fri, 24 May 2019 13:20:30 +0000 (15:20 +0200)]
KVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device

The XICS-on-XIVE KVM device needs to allocate XIVE event queues when a
priority is used by the OS. This is referred as EQ provisioning and it
is done under the hood when :

  1. a CPU is hot-plugged in the VM
  2. the "set-xive" is called at VM startup
  3. sources are restored at VM restore

The kvm->lock mutex is used to protect the different XIVE structures
being modified but in some contexts, kvm->lock is taken under the
vcpu->mutex which is not permitted by the KVM locking rules.

Introduce a new mutex 'lock' for the KVM devices for them to
synchronize accesses to the XIVE device structures.

Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier
Cédric Le Goater [Mon, 20 May 2019 07:15:14 +0000 (09:15 +0200)]
KVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier

When a vCPU is connected to the KVM device, it is done using its vCPU
identifier in the guest. Fix the enforced limit on the vCPU identifier
by taking into account the SMT mode.

Reported-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Tested-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting
Cédric Le Goater [Mon, 20 May 2019 07:15:13 +0000 (09:15 +0200)]
KVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting

When a CPU is hot-unplugged, the EQ is deconfigured using a zero size
and a zero address. In this case, there is no need to check the flag
and queue size validity. Move the checks after the queue reset code
section to fix CPU hot-unplug.

Reported-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Tested-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released
Cédric Le Goater [Mon, 20 May 2019 07:15:12 +0000 (09:15 +0200)]
KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released

Improve the release of the XIVE KVM device by clearing the file
address_space, which is used to unmap the interrupt ESB pages when a
device is passed-through.

Suggested-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu
Paul Mackerras [Thu, 23 May 2019 06:36:32 +0000 (16:36 +1000)]
KVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu

Currently the HV KVM code takes the kvm->lock around calls to
kvm_for_each_vcpu() and kvm_get_vcpu_by_id() (which can call
kvm_for_each_vcpu() internally).  However, that leads to a lock
order inversion problem, because these are called in contexts where
the vcpu mutex is held, but the vcpu mutexes nest within kvm->lock
according to Documentation/virtual/kvm/locking.txt.  Hence there
is a possibility of deadlock.

To fix this, we simply don't take the kvm->lock mutex around these
calls.  This is safe because the implementations of kvm_for_each_vcpu()
and kvm_get_vcpu_by_id() have been designed to be able to be called
locklessly.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list
Paul Mackerras [Wed, 29 May 2019 01:54:00 +0000 (11:54 +1000)]
KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list

Currently the Book 3S KVM code uses kvm->lock to synchronize access
to the kvm->arch.rtas_tokens list.  Because this list is scanned
inside kvmppc_rtas_hcall(), which is called with the vcpu mutex held,
taking kvm->lock cause a lock inversion problem, which could lead to
a deadlock.

To fix this, we add a new mutex, kvm->arch.rtas_token_lock, which nests
inside the vcpu mutexes, and use that instead of kvm->lock when
accessing the rtas token list.

This removes the lockdep_assert_held() in kvmppc_rtas_tokens_free().
At this point we don't hold the new mutex, but that is OK because
kvmppc_rtas_tokens_free() is only called when the whole VM is being
destroyed, and at that point nothing can be looking up a token in
the list.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup
Paul Mackerras [Thu, 23 May 2019 06:35:34 +0000 (16:35 +1000)]
KVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup

Currently the HV KVM code uses kvm->lock in conjunction with a flag,
kvm->arch.mmu_ready, to synchronize MMU setup and hold off vcpu
execution until the MMU-related data structures are ready.  However,
this means that kvm->lock is being taken inside vcpu->mutex, which
is contrary to Documentation/virtual/kvm/locking.txt and results in
lockdep warnings.

To fix this, we add a new mutex, kvm->arch.mmu_setup_lock, which nests
inside the vcpu mutexes, and is taken in the places where kvm->lock
was taken that are related to MMU setup.

Additionally we take the new mutex in the vcpu creation code at the
point where we are creating a new vcore, in order to provide mutual
exclusion with kvmppc_update_lpcr() and ensure that an update to
kvm->arch.lpcr doesn't get missed, which could otherwise lead to a
stale vcore->lpcr value.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions
Paul Mackerras [Thu, 23 May 2019 06:35:07 +0000 (16:35 +1000)]
KVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions

Currently, kvmppc_xive_release() and kvmppc_xive_native_release() clear
kvm->arch.mmu_ready and call kick_all_cpus_sync() as a way of ensuring
that no vcpus are executing in the guest.  However, future patches will
change the mutex associated with kvm->arch.mmu_ready to a new mutex that
nests inside the vcpu mutexes, making it difficult to continue to use
this method.

In fact, taking the vcpu mutex for a vcpu excludes execution of that
vcpu, and we already take the vcpu mutex around the call to
kvmppc_xive_[native_]cleanup_vcpu().  Once the cleanup function is
done and we release the vcpu mutex, the vcpu can execute once again,
but because we have cleared vcpu->arch.xive_vcpu, vcpu->arch.irq_type,
vcpu->arch.xive_esc_vaddr and vcpu->arch.xive_esc_raddr, that vcpu will
not be going into XIVE code any more.  Thus, once we have cleaned up
all of the vcpus, we are safe to clean up the rest of the XIVE state,
and we don't need to use kvm->arch.mmu_ready to hold off vcpu execution.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agoKVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID
Thomas Huth [Thu, 23 May 2019 16:43:08 +0000 (18:43 +0200)]
KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID

KVM_CAP_MAX_VCPU_ID is currently always reporting KVM_MAX_VCPU_ID on all
architectures. However, on s390x, the amount of usable CPUs is determined
during runtime - it is depending on the features of the machine the code
is running on. Since we are using the vcpu_id as an index into the SCA
structures that are defined by the hardware (see e.g. the sca_add_vcpu()
function), it is not only the amount of CPUs that is limited by the hard-
ware, but also the range of IDs that we can use.
Thus KVM_CAP_MAX_VCPU_ID must be determined during runtime on s390x, too.
So the handling of KVM_CAP_MAX_VCPU_ID has to be moved from the common
code into the architecture specific code, and on s390x we have to return
the same value here as for KVM_CAP_MAX_VCPUS.
This problem has been discovered with the kvm_create_max_vcpus selftest.
With this change applied, the selftest now passes on s390x, too.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20190523164309.13345-9-thuth@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
5 years agokvm: fix compile on s390 part 2
Christian Borntraeger [Mon, 27 May 2019 08:28:25 +0000 (10:28 +0200)]
kvm: fix compile on s390 part 2

We also need to fence the memunmap part.

Fixes: e45adf665a53 ("KVM: Introduce a new guest mapping API")
Fixes: d30b214d1d0a (kvm: fix compilation on s390)
Cc: Michal Kubecek <mkubecek@suse.cz>
Cc: KarimAllah Ahmed <karahmed@amazon.de>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
5 years agoLinux 5.2-rc2
Linus Torvalds [Sun, 26 May 2019 23:49:19 +0000 (16:49 -0700)]
Linux 5.2-rc2

5 years agoMerge tag 'trace-v5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sun, 26 May 2019 20:49:40 +0000 (13:49 -0700)]
Merge tag 'trace-v5.2-rc1-2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing warning fix from Steven Rostedt:
 "Make the GCC 9 warning for sub struct memset go away.

  GCC 9 now warns about calling memset() on partial structures when it
  goes across multiple fields. This adds a helper for the place in
  tracing that does this type of clearing of a structure"

* tag 'trace-v5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Silence GCC 9 array bounds warning

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 26 May 2019 20:45:15 +0000 (13:45 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "The usual smattering of fixes and tunings that came in too late for
  the merge window, but should not wait four months before they appear
  in a release.

  I also travelled a bit more than usual in the first part of May, which
  didn't help with picking up patches and reports promptly"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (33 commits)
  KVM: x86: fix return value for reserved EFER
  tools/kvm_stat: fix fields filter for child events
  KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard
  kvm: selftests: aarch64: compile with warnings on
  kvm: selftests: aarch64: fix default vm mode
  kvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size
  KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION
  KVM: x86/pmu: do not mask the value that is written to fixed PMUs
  KVM: x86/pmu: mask the result of rdpmc according to the width of the counters
  x86/kvm/pmu: Set AMD's virt PMU version to 1
  KVM: x86: do not spam dmesg with VMCS/VMCB dumps
  kvm: Check irqchip mode before assign irqfd
  kvm: svm/avic: fix off-by-one in checking host APIC ID
  KVM: selftests: do not blindly clobber registers in guest asm
  KVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c
  KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace
  KVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow
  kvm: vmx: Fix -Wmissing-prototypes warnings
  KVM: nVMX: Fix using __this_cpu_read() in preemptible context
  kvm: fix compilation on s390
  ...

5 years agoMerge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 26 May 2019 15:30:16 +0000 (08:30 -0700)]
Merge tag 'random_for_linus_stable' of git://git./linux/kernel/git/tytso/random

Pull /dev/random fix from Ted Ts'o:
 "Fix a soft lockup regression when reading from /dev/random in early
  boot"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: fix soft lockup when trying to read from an uninitialized blocking pool

5 years agorandom: fix soft lockup when trying to read from an uninitialized blocking pool
Theodore Ts'o [Wed, 22 May 2019 16:02:16 +0000 (12:02 -0400)]
random: fix soft lockup when trying to read from an uninitialized blocking pool

Fixes: eb9d1bf079bb: "random: only read from /dev/random after its pool has received 128 bits"
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
5 years agotracing: Silence GCC 9 array bounds warning
Miguel Ojeda [Thu, 23 May 2019 12:45:35 +0000 (14:45 +0200)]
tracing: Silence GCC 9 array bounds warning

Starting with GCC 9, -Warray-bounds detects cases when memset is called
starting on a member of a struct but the size to be cleared ends up
writing over further members.

Such a call happens in the trace code to clear, at once, all members
after and including `seq` on struct trace_iterator:

    In function 'memset',
        inlined from 'ftrace_dump' at kernel/trace/trace.c:8914:3:
    ./include/linux/string.h:344:9: warning: '__builtin_memset' offset
    [8505, 8560] from the object at 'iter' is out of the bounds of
    referenced subobject 'seq' with type 'struct trace_seq' at offset
    4368 [-Warray-bounds]
      344 |  return __builtin_memset(p, c, size);
          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

In order to avoid GCC complaining about it, we compute the address
ourselves by adding the offsetof distance instead of referring
directly to the member.

Since there are two places doing this clear (trace.c and trace_kdb.c),
take the chance to move the workaround into a single place in
the internal header.

Link: http://lkml.kernel.org/r/20190523124535.GA12931@gmail.com
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
[ Removed unnecessary parenthesis around "iter" ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoMerge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 25 May 2019 22:03:12 +0000 (15:03 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Bug fixes (including a regression fix) for ext4"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix dcache lookup of !casefolded directories
  ext4: do not delete unlinked inode from orphan list on failed truncate
  ext4: wait for outstanding dio during truncate in nojournal mode
  ext4: don't perform block validity checks on the journal inode

5 years agoMerge tag 'libnvdimm-fixes-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 May 2019 17:11:23 +0000 (10:11 -0700)]
Merge tag 'libnvdimm-fixes-5.2-rc2' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - Fix a regression that disabled device-mapper dax support

 - Remove unnecessary hardened-user-copy overhead (>30%) for dax
   read(2)/write(2).

 - Fix some compilation warnings.

* tag 'libnvdimm-fixes-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm/pmem: Bypass CONFIG_HARDENED_USERCOPY overhead
  dax: Arrange for dax_supported check to span multiple devices
  libnvdimm: Fix compilation warnings with W=1

5 years agoMerge tag 'trace-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 25 May 2019 17:08:14 +0000 (10:08 -0700)]
Merge tag 'trace-v5.2-rc1' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Tom Zanussi sent me some small fixes and cleanups to the histogram
  code and I forgot to incorporate them.

  I also added a small clean up patch that was sent to me a while ago
  and I just noticed it"

* tag 'trace-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  kernel/trace/trace.h: Remove duplicate header of trace_seq.h
  tracing: Add a check_val() check before updating cond_snapshot() track_val
  tracing: Check keys for variable references in expressions too
  tracing: Prevent hist_field_var_ref() from accessing NULL tracing_map_elts

5 years agoext4: fix dcache lookup of !casefolded directories
Gabriel Krisman Bertazi [Sat, 25 May 2019 03:48:23 +0000 (23:48 -0400)]
ext4: fix dcache lookup of !casefolded directories

Found by visual inspection, this wasn't caught by my xfstest, since it's
effect is ignoring positive dentries in the cache the fallback just goes
to the disk.  it was introduced in the last iteration of the
case-insensitive patch.

d_compare should return 0 when the entries match, so make sure we are
correctly comparing the entire string if the encoding feature is set and
we are on a case-INsensitive directory.

Fixes: b886ee3e778e ("ext4: Support case-insensitive file name lookups")
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
5 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 25 May 2019 00:30:28 +0000 (17:30 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is the same set of patches sent in the merge window as the final
  pull except that Martin's read only rework is replaced with a simple
  revert of the original change that caused the regression.

  Everything else is an obvious fix or small cleanup"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  Revert "scsi: sd: Keep disk read-only when re-reading partition"
  scsi: bnx2fc: fix incorrect cast to u64 on shift operation
  scsi: smartpqi: Reporting unhandled SCSI errors
  scsi: myrs: Fix uninitialized variable
  scsi: lpfc: Update lpfc version to 12.2.0.2
  scsi: lpfc: add check for loss of ndlp when sending RRQ
  scsi: lpfc: correct rcu unlock issue in lpfc_nvme_info_show
  scsi: lpfc: resolve lockdep warnings
  scsi: qedi: remove set but not used variables 'cdev' and 'udev'
  scsi: qedi: remove memset/memcpy to nfunc and use func instead
  scsi: qla2xxx: Add cleanup for PCI EEH recovery

5 years agoMerge tag 'for-linus-20190524' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 24 May 2019 23:02:14 +0000 (16:02 -0700)]
Merge tag 'for-linus-20190524' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - NVMe pull request from Keith, with fixes from a few folks.

 - bio and sbitmap before atomic barrier fixes (Andrea)

 - Hang fix for blk-mq freeze and unfreeze (Bob)

 - Single segment count regression fix (Christoph)

 - AoE now has a new maintainer

 - tools/io_uring/ Makefile fix, and sync with liburing (me)

* tag 'for-linus-20190524' of git://git.kernel.dk/linux-block: (23 commits)
  tools/io_uring: sync with liburing
  tools/io_uring: fix Makefile for pthread library link
  blk-mq: fix hang caused by freeze/unfreeze sequence
  block: remove the bi_seg_{front,back}_size fields in struct bio
  block: remove the segment size check in bio_will_gap
  block: force an unlimited segment size on queues with a virt boundary
  block: don't decrement nr_phys_segments for physically contigous segments
  sbitmap: fix improper use of smp_mb__before_atomic()
  bio: fix improper use of smp_mb__before_atomic()
  aoe: list new maintainer for aoe driver
  nvme-pci: use blk-mq mapping for unmanaged irqs
  nvme: update MAINTAINERS
  nvme: copy MTFA field from identify controller
  nvme: fix memory leak for power latency tolerance
  nvme: release namespace SRCU protection before performing controller ioctls
  nvme: merge nvme_ns_ioctl into nvme_ioctl
  nvme: remove the ifdef around nvme_nvm_ioctl
  nvme: fix srcu locking on error return in nvme_get_ns_from_disk
  nvme: Fix known effects
  nvme-pci: Sync queues on reset
  ...

5 years agoMerge tag 'linux-kselftest-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 24 May 2019 22:21:05 +0000 (15:21 -0700)]
Merge tag 'linux-kselftest-5.2-rc2' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull Kselftest fixes from Shuah Khan:

 - Two fixes to regressions introduced in kselftest Makefile test run
   output refactoring work (Kees Cook)

 - Adding Atom support to syscall_arg_fault test (Tong Bo)

* tag 'linux-kselftest-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/timers: Add missing fflush(stdout) calls
  selftests: Remove forced unbuffering for test running
  selftests/x86: Support Atom for syscall_arg_fault test

5 years agoMerge tag 'devicetree-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 24 May 2019 22:16:46 +0000 (15:16 -0700)]
Merge tag 'devicetree-fixes-for-5.2' of git://git./linux/kernel/git/robh/linux

Pull Devicetree fixes from Rob Herring:

 - Update checkpatch.pl to use DT vendor-prefixes.yaml

 - Fix DT binding references to files converted to DT schema

 - Clean-up Arm CPU binding examples to match schema

 - Add Sifive block versioning scheme documentation

 - Pass binding directory base to validation tools for reference lookups

* tag 'devicetree-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  checkpatch.pl: Update DT vendor prefix check
  dt: bindings: mtd: replace references to nand.txt with nand-controller.yaml
  dt-bindings: interrupt-controller: arm,gic: Fix schema errors in example
  dt-bindings: arm: Clean up CPU binding examples
  dt: fix refs that were renamed to json with the same file name
  dt-bindings: Pass binding directory to validation tools
  dt-bindings: sifive: describe sifive-blocks versioning

5 years agoMerge tag 'spdx-5.2-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 24 May 2019 21:31:58 +0000 (14:31 -0700)]
Merge tag 'spdx-5.2-rc2-2' of git://git./linux/kernel/git/gregkh/driver-core

Pule more SPDX updates from Greg KH:
 "Here is another set of reviewed patches that adds SPDX tags to
  different kernel files, based on a set of rules that are being used to
  parse the comments to try to determine that the license of the file is
  "GPL-2.0-or-later".

  Only the "obvious" versions of these matches are included here, a
  number of "non-obvious" variants of text have been found but those
  have been postponed for later review and analysis.

  These patches have been out for review on the linux-spdx@vger mailing
  list, and while they were created by automatic tools, they were
  hand-verified by a bunch of different people, all whom names are on
  the patches are reviewers"

* tag 'spdx-5.2-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (85 commits)
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 121
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 119
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 116
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 113
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 112
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 110
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 106
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 105
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 104
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 103
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 101
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 98
  ...

5 years agolocking/lock_events: Use this_cpu_add() when necessary
Waiman Long [Fri, 24 May 2019 19:42:22 +0000 (15:42 -0400)]
locking/lock_events: Use this_cpu_add() when necessary

The kernel test robot has reported that the use of __this_cpu_add()
causes bug messages like:

  BUG: using __this_cpu_add() in preemptible [00000000] code: ...

Given the imprecise nature of the count and the possibility of resetting
the count and doing the measurement again, this is not really a big
problem to use the unprotected __this_cpu_*() functions.

To make the preemption checking code happy, the this_cpu_*() functions
will be used if CONFIG_DEBUG_PREEMPT is defined.

The imprecise nature of the locking counts are also documented with
the suggestion that we should run the measurement a few times with the
counts reset in between to get a better picture of what is going on
under the hood.

Fixes: a8654596f0371 ("locking/rwsem: Enable lock event counting")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoKVM: x86: fix return value for reserved EFER
Paolo Bonzini [Fri, 24 May 2019 19:52:46 +0000 (21:52 +0200)]
KVM: x86: fix return value for reserved EFER

Commit 11988499e62b ("KVM: x86: Skip EFER vs. guest CPUID checks for
host-initiated writes", 2019-04-02) introduced a "return false" in a
function returning int, and anyway set_efer has a "nonzero on error"
conventon so it should be returning 1.

Reported-by: Pavel Machek <pavel@denx.de>
Fixes: 11988499e62b ("KVM: x86: Skip EFER vs. guest CPUID checks for host-initiated writes")
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agotools/kvm_stat: fix fields filter for child events
Stefan Raspl [Sun, 21 Apr 2019 13:26:24 +0000 (15:26 +0200)]
tools/kvm_stat: fix fields filter for child events

The fields filter would not work with child fields, as the respective
parents would not be included. No parents displayed == no childs displayed.
To reproduce, run on s390 (would work on other platforms, too, but would
require a different filter name):
- Run 'kvm_stat -d'
- Press 'f'
- Enter 'instruct'
Notice that events like instruction_diag_44 or instruction_diag_500 are not
displayed - the output remains empty.
With this patch, we will filter by matching events and their parents.
However, consider the following example where we filter by
instruction_diag_44:

  kvm statistics - summary
                   regex filter: instruction_diag_44
   Event                                         Total %Total CurAvg/s
   exit_instruction                                276  100.0       12
     instruction_diag_44                           256   92.8       11
   Total                                           276              12

Note that the parent ('exit_instruction') displays the total events, but
the childs listed do not match its total (256 instead of 276). This is
intended (since we're filtering all but one child), but might be confusing
on first sight.

Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard
Thomas Huth [Thu, 23 May 2019 09:31:14 +0000 (11:31 +0200)]
KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard

struct kvm_nested_state is only available on x86 so far. To be able
to compile the code on other architectures as well, we need to wrap
the related code with #ifdefs.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: aarch64: compile with warnings on
Andrew Jones [Thu, 23 May 2019 10:16:34 +0000 (12:16 +0200)]
kvm: selftests: aarch64: compile with warnings on

aarch64 fixups needed to compile with warnings as errors.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: aarch64: fix default vm mode
Andrew Jones [Thu, 23 May 2019 11:05:46 +0000 (13:05 +0200)]
kvm: selftests: aarch64: fix default vm mode

VM_MODE_P52V48_4K is not a valid mode for AArch64. Replace its
use in vm_create_default() with a mode that works and represents
a good AArch64 default. (We didn't ever see a problem with this
because we don't have any unit tests using vm_create_default(),
but it's good to get it fixed in advance.)

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size
Andrew Jones [Thu, 23 May 2019 09:34:05 +0000 (11:34 +0200)]
kvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size

The memory slot size must be aligned to the host's page size. When
testing a guest with a 4k page size on a host with a 64k page size,
then 3 guest pages are not host page size aligned. Since we just need
a nearly arbitrary number of extra pages to ensure the memslot is not
aligned to a 64 host-page boundary for this test, then we can use
16, as that's 64k aligned, but not 64 * 64k aligned.

Fixes: 76d58e0f07ec ("KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size", 2019-04-17)
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION
Christian Borntraeger [Fri, 24 May 2019 14:06:23 +0000 (16:06 +0200)]
KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION

kselftests exposed a problem in the s390 handling for memory slots.
Right now we only do proper memory slot handling for creation of new
memory slots. Neither MOVE, nor DELETION are handled properly. Let us
implement those.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86/pmu: do not mask the value that is written to fixed PMUs
Paolo Bonzini [Mon, 20 May 2019 15:34:30 +0000 (17:34 +0200)]
KVM: x86/pmu: do not mask the value that is written to fixed PMUs

According to the SDM, for MSR_IA32_PERFCTR0/1 "the lower-order 32 bits of
each MSR may be written with any value, and the high-order 8 bits are
sign-extended according to the value of bit 31", but the fixed counters
in real hardware are limited to the width of the fixed counters ("bits
beyond the width of the fixed-function counter are reserved and must be
written as zeros").  Fix KVM to do the same.

Reported-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86/pmu: mask the result of rdpmc according to the width of the counters
Paolo Bonzini [Mon, 20 May 2019 15:20:40 +0000 (17:20 +0200)]
KVM: x86/pmu: mask the result of rdpmc according to the width of the counters

This patch will simplify the changes in the next, by enforcing the
masking of the counters to RDPMC and RDMSR.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agox86/kvm/pmu: Set AMD's virt PMU version to 1
Borislav Petkov [Wed, 8 May 2019 17:02:48 +0000 (19:02 +0200)]
x86/kvm/pmu: Set AMD's virt PMU version to 1

After commit:

  672ff6cff80c ("KVM: x86: Raise #GP when guest vCPU do not support PMU")

my AMD guests started #GPing like this:

  general protection fault: 0000 [#1] PREEMPT SMP
  CPU: 1 PID: 4355 Comm: bash Not tainted 5.1.0-rc6+ #3
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
  RIP: 0010:x86_perf_event_update+0x3b/0xa0

with Code: pointing to RDPMC. It is RDPMC because the guest has the
hardware watchdog CONFIG_HARDLOCKUP_DETECTOR_PERF enabled which uses
perf. Instrumenting kvm_pmu_rdpmc() some, showed that it fails due to:

  if (!pmu->version)
   return 1;

which the above commit added. Since AMD's PMU leaves the version at 0,
that causes the #GP injection into the guest.

Set pmu->version arbitrarily to 1 and move it above the non-applicable
struct kvm_pmu members.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Cc: kvm@vger.kernel.org
Cc: Liran Alon <liran.alon@oracle.com>
Cc: Mihai Carabas <mihai.carabas@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86@kernel.org
Cc: stable@vger.kernel.org
Fixes: 672ff6cff80c ("KVM: x86: Raise #GP when guest vCPU do not support PMU")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86: do not spam dmesg with VMCS/VMCB dumps
Paolo Bonzini [Mon, 20 May 2019 13:34:35 +0000 (15:34 +0200)]
KVM: x86: do not spam dmesg with VMCS/VMCB dumps

Userspace can easily set up invalid processor state in such a way that
dmesg will be filled with VMCS or VMCB dumps.  Disable this by default
using a module parameter.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: Check irqchip mode before assign irqfd
Peter Xu [Sun, 5 May 2019 08:56:42 +0000 (16:56 +0800)]
kvm: Check irqchip mode before assign irqfd

When assigning kvm irqfd we didn't check the irqchip mode but we allow
KVM_IRQFD to succeed with all the irqchip modes.  However it does not
make much sense to create irqfd even without the kernel chips.  Let's
provide a arch-dependent helper to check whether a specific irqfd is
allowed by the arch.  At least for x86, it should make sense to check:

- when irqchip mode is NONE, all irqfds should be disallowed, and,

- when irqchip mode is SPLIT, irqfds that are with resamplefd should
  be disallowed.

For either of the case, previously we'll silently ignore the irq or
the irq ack event if the irqchip mode is incorrect.  However that can
cause misterious guest behaviors and it can be hard to triage.  Let's
fail KVM_IRQFD even earlier to detect these incorrect configurations.

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Radim Krčmář <rkrcmar@redhat.com>
CC: Alex Williamson <alex.williamson@redhat.com>
CC: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: svm/avic: fix off-by-one in checking host APIC ID
Suthikulpanit, Suravee [Tue, 14 May 2019 15:49:52 +0000 (15:49 +0000)]
kvm: svm/avic: fix off-by-one in checking host APIC ID

Current logic does not allow VCPU to be loaded onto CPU with
APIC ID 255. This should be allowed since the host physical APIC ID
field in the AVIC Physical APIC table entry is an 8-bit value,
and APIC ID 255 is valid in system with x2APIC enabled.
Instead, do not allow VCPU load if the host APIC ID cannot be
represented by an 8-bit value.

Also, use the more appropriate AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK
instead of AVIC_MAX_PHYSICAL_ID_COUNT.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: do not blindly clobber registers in guest asm
Paolo Bonzini [Mon, 20 May 2019 11:31:02 +0000 (13:31 +0200)]
KVM: selftests: do not blindly clobber registers in guest asm

The guest_code of sync_regs_test is assuming that the compiler will not
touch %r11 outside the asm that increments it, which is a bit brittle.
Instead, we can increment a variable and use a dummy asm to ensure the
increment is not optimized away.  However, we also need to use a
callee-save register or the compiler will insert a save/restore around
the vmexit, breaking the whole idea behind the test.

(Yes, "if it ain't broken...", but I would like the test to be clean
before it is copied into the upcoming s390 selftests).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c
Thomas Huth [Mon, 20 May 2019 10:55:11 +0000 (12:55 +0200)]
KVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c

The check for entry->index == 0 is done twice. One time should
be sufficient.

Suggested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace
Wanpeng Li [Mon, 20 May 2019 08:18:07 +0000 (16:18 +0800)]
KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace

Expose per-vCPU timer_advance_ns to userspace, so it is able to
query the auto-adjusted value.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow
Wanpeng Li [Mon, 20 May 2019 08:18:06 +0000 (16:18 +0800)]
KVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow

After commit c3941d9e0 (KVM: lapic: Allow user to disable adaptive tuning of
timer advancement), '-1' enables adaptive tuning starting from default
advancment of 1000ns. However, we should expose an int instead of an overflow
uint module parameter.

Before patch:

/sys/module/kvm/parameters/lapic_timer_advance_ns:4294967295

After patch:

/sys/module/kvm/parameters/lapic_timer_advance_ns:-1

Fixes: c3941d9e0 (KVM: lapic: Allow user to disable adaptive tuning of timer advancement)
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: vmx: Fix -Wmissing-prototypes warnings
Yi Wang [Mon, 20 May 2019 04:27:47 +0000 (12:27 +0800)]
kvm: vmx: Fix -Wmissing-prototypes warnings

We get a warning when build kernel W=1:
arch/x86/kvm/vmx/vmx.c:6365:6: warning: no previous prototype for ‘vmx_update_host_rsp’ [-Wmissing-prototypes]
 void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp)

Add the missing declaration to fix this.

Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: nVMX: Fix using __this_cpu_read() in preemptible context
Wanpeng Li [Fri, 17 May 2019 08:49:50 +0000 (16:49 +0800)]
KVM: nVMX: Fix using __this_cpu_read() in preemptible context

 BUG: using __this_cpu_read() in preemptible [00000000] code: qemu-system-x86/4590
  caller is nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
  CPU: 4 PID: 4590 Comm: qemu-system-x86 Tainted: G           OE     5.1.0-rc4+ #1
  Call Trace:
   dump_stack+0x67/0x95
   __this_cpu_preempt_check+0xd2/0xe0
   nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
   nested_vmx_run+0xda/0x2b0 [kvm_intel]
   handle_vmlaunch+0x13/0x20 [kvm_intel]
   vmx_handle_exit+0xbd/0x660 [kvm_intel]
   kvm_arch_vcpu_ioctl_run+0xa2c/0x1e50 [kvm]
   kvm_vcpu_ioctl+0x3ad/0x6d0 [kvm]
   do_vfs_ioctl+0xa5/0x6e0
   ksys_ioctl+0x6d/0x80
   __x64_sys_ioctl+0x1a/0x20
   do_syscall_64+0x6f/0x6c0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

Accessing per-cpu variable should disable preemption, this patch extends the
preemption disable region for __this_cpu_read().

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: 52017608da33 ("KVM: nVMX: add option to perform early consistency checks via H/W")
Cc: stable@vger.kernel.org
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: fix compilation on s390
Paolo Bonzini [Mon, 20 May 2019 10:06:36 +0000 (12:06 +0200)]
kvm: fix compilation on s390

s390 does not have memremap, even though in this particular case it
would be useful.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86: Include CPUID leaf 0x8000001e in kvm's supported CPUID
Jim Mattson [Wed, 27 Mar 2019 20:15:37 +0000 (13:15 -0700)]
kvm: x86: Include CPUID leaf 0x8000001e in kvm's supported CPUID

Kvm now supports extended CPUID functions through 0x8000001f.  CPUID
leaf 0x8000001e is AMD's Processor Topology Information leaf. This
contains similar information to CPUID leaf 0xb (Intel's Extended
Topology Enumeration leaf), and should be included in the output of
KVM_GET_SUPPORTED_CPUID, even though userspace is likely to override
some of this information based upon the configuration of the
particular VM.

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Borislav Petkov <bp@suse.de>
Fixes: 8765d75329a38 ("KVM: X86: Extend CPUID range to include new leaf")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86: Include multiple indices with CPUID leaf 0x8000001d
Jim Mattson [Wed, 27 Mar 2019 20:15:36 +0000 (13:15 -0700)]
kvm: x86: Include multiple indices with CPUID leaf 0x8000001d

Per the APM, "CPUID Fn8000_001D_E[D,C,B,A]X reports cache topology
information for the cache enumerated by the value passed to the
instruction in ECX, referred to as Cache n in the following
description. To gather information for all cache levels, software must
repeatedly execute CPUID with 8000_001Dh in EAX and ECX set to
increasing values beginning with 0 until a value of 00h is returned in
the field CacheType (EAX[4:0]) indicating no more cache descriptions
are available for this processor."

The termination condition is the same as leaf 4, so we can reuse that
code block for leaf 0x8000001d.

Fixes: 8765d75329a38 ("KVM: X86: Extend CPUID range to include new leaf")
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: Compile code with warnings enabled
Thomas Huth [Fri, 17 May 2019 09:04:45 +0000 (11:04 +0200)]
KVM: selftests: Compile code with warnings enabled

So far the KVM selftests are compiled without any compiler warnings
enabled. That's quite bad, since we miss a lot of possible bugs this
way. Let's enable at least "-Wall" and some other useful warning flags
now, and fix at least the trivial problems in the code (like unused
variables).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: avoid type punning
Paolo Bonzini [Mon, 20 May 2019 10:02:16 +0000 (12:02 +0200)]
kvm: selftests: avoid type punning

Avoid warnings from -Wstrict-aliasing by using memcpy.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: Fix a condition in test_hv_cpuid()
Dan Carpenter [Tue, 14 May 2019 10:34:51 +0000 (13:34 +0300)]
KVM: selftests: Fix a condition in test_hv_cpuid()

The code is trying to check that all the padding is zeroed out and it
does this:

    entry->padding[0] == entry->padding[1] == entry->padding[2] == 0

Assume everything is zeroed correctly, then the first comparison is
true, the next comparison is false and false is equal to zero so the
overall condition is true.  This bug doesn't affect run time very
badly, but the code should instead just check that all three paddings
are zero individually.

Also the error message was copy and pasted from an earlier error and it
wasn't correct.

Fixes: 7edcb7343327 ("KVM: selftests: Add hyperv_cpuid test")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: Fix spinlock taken warning during host resume
Wanpeng Li [Fri, 17 May 2019 08:49:49 +0000 (16:49 +0800)]
KVM: Fix spinlock taken warning during host resume

 WARNING: CPU: 0 PID: 13554 at kvm/arch/x86/kvm//../../../virt/kvm/kvm_main.c:4183 kvm_resume+0x3c/0x40 [kvm]
  CPU: 0 PID: 13554 Comm: step_after_susp Tainted: G           OE     5.1.0-rc4+ #1
  RIP: 0010:kvm_resume+0x3c/0x40 [kvm]
  Call Trace:
   syscore_resume+0x63/0x2d0
   suspend_devices_and_enter+0x9d1/0xa40
   pm_suspend+0x33a/0x3b0
   state_store+0x82/0xf0
   kobj_attr_store+0x12/0x20
   sysfs_kf_write+0x4b/0x60
   kernfs_fop_write+0x120/0x1a0
   __vfs_write+0x1b/0x40
   vfs_write+0xcd/0x1d0
   ksys_write+0x5f/0xe0
   __x64_sys_write+0x1a/0x20
   do_syscall_64+0x6f/0x6c0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

Commit ca84d1a24 (KVM: x86: Add clock sync request to hardware enable) mentioned
that "we always hold kvm_lock when hardware_enable is called.  The one place that
doesn't need to worry about it is resume, as resuming a frozen CPU, the spinlock
won't be taken." However, commit 6706dae9 (virt/kvm: Replace spin_is_locked() with
lockdep) introduces a bug, it asserts when the lock is not held which is contrary
to the original goal.

This patch fixes it by WARN_ON when the lock is held.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: 6706dae9 ("virt/kvm: Replace spin_is_locked() with lockdep")
[Wrap with #ifdef CONFIG_LOCKDEP - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: nVMX: Clear nested_run_pending if setting nested state fails
Sean Christopherson [Wed, 8 May 2019 18:04:32 +0000 (11:04 -0700)]
KVM: nVMX: Clear nested_run_pending if setting nested state fails

VMX's nested_run_pending flag is subtly consumed when stuffing state to
enter guest mode, i.e. needs to be set according before KVM knows if
setting guest state is successful.  If setting guest state fails, clear
the flag as a nested run is obviously not pending.

Reported-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: nVMX: really fix the size checks on KVM_SET_NESTED_STATE
Paolo Bonzini [Mon, 20 May 2019 09:55:36 +0000 (11:55 +0200)]
KVM: nVMX: really fix the size checks on KVM_SET_NESTED_STATE

The offset for reading the shadow VMCS is sizeof(*kvm_state)+VMCS12_SIZE,
so the correct size must be that plus sizeof(*vmcs12).  This could lead
to KVM reading garbage data from userspace and not reporting an error,
but is otherwise not sensitive.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoMerge tag 'kvmarm-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Fri, 24 May 2019 19:27:00 +0000 (21:27 +0200)]
Merge tag 'kvmarm-fixes-for-5.2' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm updates for 5.2-rc2

- Correctly annotate HYP-callable code to be non-traceable
- Remove Christoffer from the MAINTAINERS file as his request

5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 24 May 2019 18:03:26 +0000 (11:03 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull more arm64 fixes from Will Deacon:

 - Fix incorrect LDADD instruction encoding in our disassembly macros

 - Disable the broken ARM64_PSEUDO_NMI support for now

 - Add workaround for Cortex-A76 CPU erratum #1463225

 - Handle Cortex-A76/Neoverse-N1 erratum #1418040 w/ existing workaround

 - Fix IORT build failure if IOMMU_SUPPORT=n

 - Fix place-relative module relocation range checking and its
   interaction with KASLR

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: insn: Add BUILD_BUG_ON() for invalid masks
  arm64: insn: Fix ldadd instruction encoding
  arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now
  arm64: Handle erratum 1418040 as a superset of erratum 1188873
  arm64/module: deal with ambiguity in PRELxx relocation ranges
  ACPI/IORT: Fix build error when IOMMU_SUPPORT is disabled
  arm64/kernel: kaslr: reduce module randomization range to 2 GB
  arm64: errata: Add workaround for Cortex-A76 erratum #1463225
  arm64: Remove useless message during oops

5 years agoMerge tag 'platform-drivers-x86-v5.2-2' of git://git.infradead.org/linux-platform...
Linus Torvalds [Fri, 24 May 2019 17:19:26 +0000 (10:19 -0700)]
Merge tag 'platform-drivers-x86-v5.2-2' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver fixes from Andy Shevchenko:
 "Some of Intel Cherrytrail based platforms depend on PMC clock to be
  always on. Here are a couple of quirks to the driver to support
  affected hardware"

* tag 'platform-drivers-x86-v5.2-2' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: pmc_atom: Add several Beckhoff Automation boards to critclk_systems DMI table
  platform/x86: pmc_atom: Add Lex 3I380D industrial PC to critclk_systems DMI table

5 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
Linus Torvalds [Fri, 24 May 2019 17:04:17 +0000 (10:04 -0700)]
Merge branch 'fixes' of git://git./linux/kernel/git/evalenti/linux-soc-thermal

Pull thermal SoC fixes from Eduardo Valentin:

 - revert pinctrl settings on rockchip which causes boot failure on
   rk3288. The proper follow-up patch is being discussed, meanwhile
   the revert gets those booting again.

 - minor fixes on rcar and tegra

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal: rcar_gen3_thermal: Update temperature conversion method
  thermal: rcar_gen3_thermal: Update calculation formula of IRQTEMP
  thermal: rcar_gen3_thermal: Update value of Tj_1
  thermal: tegra: Make tegra210_tsensor_thermtrips static
  Revert "thermal: rockchip: fix up the tsadc pinctrl setting error"

5 years agoMerge tag 'mmc-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 24 May 2019 16:57:11 +0000 (09:57 -0700)]
Merge tag 'mmc-v5.2-2' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "Fix HS50 data hold time problem for a few variants of sdhci-iproc"

* tag 'mmc-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-iproc: Set NO_HISPD bit to fix HS50 data hold time problem
  mmc: sdhci-iproc: cygnus: Set NO_HISPD bit to fix HS50 data hold time problem

5 years agoMerge tag 'drm-fixes-2019-05-24-1' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 24 May 2019 16:12:46 +0000 (09:12 -0700)]
Merge tag 'drm-fixes-2019-05-24-1' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Nothing too unusual here for rc2. Except the amdgpu DMCU firmware
  loading fix caused build breakage with a different set of Kconfig
  options. I've just reverted it for now until the AMD folks can rewrite
  it to avoid that problem.

  i915:
   - boosting fix
   - bump ready task fixes
   - GVT - reset fix, error return, TRTT handling fix

  amdgpu:
   - DMCU firmware loading fix
   - Polaris 10 pci id for kfd
   - picasso screen corruption fix
   - SR-IOV fixes
   - vega driver reload fixes
   - SMU locking fix
   - compute profile fix for kfd

  vmwgfx:
   - integer overflow fixes
   - dma sg fix

  sun4i:
   - HDMI phy fixes

  gma500:
   - LVDS detection fix

  panfrost:
   - devfreq selection fix"

* tag 'drm-fixes-2019-05-24-1' of git://anongit.freedesktop.org/drm/drm: (32 commits)
  Revert "drm/amd/display: Don't load DMCU for Raven 1"
  drm/panfrost: Select devfreq
  drm/gma500/cdv: Check vbt config bits when detecting lvds panels
  drm/vmwgfx: integer underflow in vmw_cmd_dx_set_shader() leading to an invalid read
  drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define()
  drm/vmwgfx: Use the dma scatter-gather iterator to get dma addresses
  drm/vmwgfx: Fix compat mode shader operation
  drm/vmwgfx: Fix user space handle equal to zero
  drm/vmwgfx: Don't send drm sysfs hotplug events on initial master set
  drm/i915/gvt: Fix an error code in ppgtt_populate_spt_by_guest_entry()
  drm/i915/gvt: do not let TRTTE and 0x4dfc write passthrough to hardware
  drm/i915/gvt: add 0x4dfc to gen9 save-restore list
  drm/i915/gvt: Tiled Resources mmios are in-context mmios for gen9+
  drm/i915/gvt: use cmd to restore in-context mmios to hw for gen9 platform
  drm/i915/gvt: emit init breadcrumb for gvt request
  drm/amdkfd: Fix compute profile switching
  drm/amdgpu: skip fw pri bo alloc for SRIOV
  drm/amd/powerplay: fix locking in smu_feature_set_supported()
  drm/amdgpu/gmc9: set vram_width properly for SR-IOV
  drm/amdgpu/soc15: skip reset on init
  ...

5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125
Thomas Gleixner [Thu, 23 May 2019 09:15:02 +0000 (11:15 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125

Based on 1 normalized pattern(s):

  osl gpl code release authorized by [jalil] [fadavi] this program is
  free software you can redistribute it and or modify it under the
  terms of the gnu general public license as published by the free
  software foundation either version 2 or at your option any later
  version this program is distributed in the hope that it will be
  useful but without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with this program see
  the file copying if not write to the free software foundation 675
  mass ave cambridge ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.689335553@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123
Thomas Gleixner [Thu, 23 May 2019 09:15:00 +0000 (11:15 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 or later as published by the free software foundation this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with this program if
  not see http www gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 7 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.504392586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122
Thomas Gleixner [Thu, 23 May 2019 09:14:59 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 2 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.414247666@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 121
Thomas Gleixner [Thu, 23 May 2019 09:14:58 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 121

Based on 1 normalized pattern(s):

  licensed under the gplv2 or at your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.323272658@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120
Thomas Gleixner [Thu, 23 May 2019 09:14:57 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not see the file copying or write to the free
  software foundation inc

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 12 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.231300438@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 119
Thomas Gleixner [Thu, 23 May 2019 09:14:56 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 119

Based on 1 normalized pattern(s):

  released under the gpl this program is free software you can
  redistribute it and or modify it under the terms of the gnu general
  public license as published by the free software foundation either
  version 2 of the license or at your option any later version this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 2 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.124582774@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
Thomas Gleixner [Thu, 23 May 2019 09:14:55 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 or at your option any
  later version this program is distributed in the hope that it will
  be useful but without any warranty without even the implied warranty
  of merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 44 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.032047323@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 116
Thomas Gleixner [Thu, 23 May 2019 09:14:53 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 116

Based on 1 normalized pattern(s):

  gpl license this program is free software you can redistribute it
  and or modify it under the terms of the gnu general public license
  as published by the free software foundation either version 2 of the
  license or at your option any later version this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 59 temple place suite 330 boston ma 02111
  1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.847878191@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
Thomas Gleixner [Thu, 23 May 2019 09:14:51 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 8 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.663497195@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 113
Thomas Gleixner [Thu, 23 May 2019 09:14:50 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 113

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details to
  obtain the license point your browser to http www gnu org copyleft
  gpl html

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 26 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.572604764@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 112
Thomas Gleixner [Thu, 23 May 2019 09:14:49 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 112

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or
  later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 4 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.480557885@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111
Thomas Gleixner [Thu, 23 May 2019 09:14:48 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  i t under the terms of the gnu general public license as published
  by th e free software foundation either version 2 of the license or
  at you r option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.375638818@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 110
Thomas Gleixner [Thu, 23 May 2019 09:14:47 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 110

Based on 1 normalized pattern(s):

  this file is free software you can redistribute it and or modify it
  under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this file is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091650.284757242@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 106
Thomas Gleixner [Thu, 23 May 2019 09:14:43 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 106

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this software is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with atmel wireless lan drivers if not see http www gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 2 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.881590905@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 105
Thomas Gleixner [Thu, 23 May 2019 09:14:42 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 105

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version author [hema] [hk] [hemahk]@[ti] [com]
  this program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with this program if
  not write to the free software foundation inc 675 mass ave cambridge
  ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.791555110@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 104
Thomas Gleixner [Thu, 23 May 2019 09:14:41 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 104

Based on 1 normalized pattern(s):

  this sctp implementation is free software you can redistribute it
  and or modify it under the terms of the gnu general public license
  as published by the free software foundation either version 2 or at
  your option any later version this sctp implementation is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with gnu cc see the file copying if not see
  http www gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 42 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.683323110@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 103
Thomas Gleixner [Thu, 23 May 2019 09:14:40 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 103

Based on 1 normalized pattern(s):

  the sctp implementation is free software you can redistribute it and
  or modify it under the terms of the gnu general public license as
  published by the free software foundation either version 2 or at
  your option any later version the sctp implementation is distributed
  in the hope that it will be useful but without any warranty without
  even the implied warranty of merchantability or fitness for a
  particular purpose see the gnu general public license for more
  details you should have received a copy of the gnu general public
  license along with gnu cc see the file copying if not see http www
  gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.592169384@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
Thomas Gleixner [Thu, 23 May 2019 09:14:39 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  51 franklin st fifth floor boston ma 02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 50 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.499889647@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotreewide: Replace GPLv2 boilerplate/reference with SPDX - rule 101
Thomas Gleixner [Thu, 23 May 2019 09:14:38 +0000 (11:14 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 101

Based on 1 normalized pattern(s):

  the sctp reference implementation is free software you can
  redistribute it and or modify it under the terms of the gnu general
  public license as published by the free software foundation either
  version 2 or at your option any later version the sctp reference
  implementation is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with gnu cc see the
  file copying if not see http www gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091649.408473526@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>