Alexander Graf [Thu, 29 Jul 2010 12:47:54 +0000 (14:47 +0200)]
KVM: PPC: Magic Page Book3s support
We need to override EA as well as PA lookups for the magic page. When the guest
tells us to project it, the magic page overrides any guest mappings.
In order to reflect that, we need to hook into all the MMU layers of KVM to
force map the magic page if necessary.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:53 +0000 (14:47 +0200)]
KVM: PPC: First magic page steps
We will be introducing a method to project the shared page in guest context.
As soon as we're talking about this coupling, the shared page is colled magic
page.
This patch introduces simple defines, so the follow-up patches are easier to
read.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:52 +0000 (14:47 +0200)]
KVM: PPC: Make PAM a define
On PowerPC it's very normal to not support all of the physical RAM in real mode.
To check if we're matching on the shared page or not, we need to know the limits
so we can restrain ourselves to that range.
So let's make it a define instead of open-coding it. And while at it, let's also
increase it.
Signed-off-by: Alexander Graf <agraf@suse.de>
v2 -> v3:
- RMO -> PAM (non-magic page)
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:51 +0000 (14:47 +0200)]
KVM: PPC: Tell guest about pending interrupts
When the guest turns on interrupts again, it needs to know if we have an
interrupt pending for it. Because if so, it should rather get out of guest
context and get the interrupt.
So we introduce a new field in the shared page that we use to tell the guest
that there's a pending interrupt lying around.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:50 +0000 (14:47 +0200)]
KVM: PPC: Add PV guest scratch registers
While running in hooked code we need to store register contents out because
we must not clobber any registers.
So let's add some fields to the shared page we can just happily write to.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:49 +0000 (14:47 +0200)]
KVM: PPC: Add PV guest critical sections
When running in hooked code we need a way to disable interrupts without
clobbering any interrupts or exiting out to the hypervisor.
To achieve this, we have an additional critical field in the shared page. If
that field is equal to the r1 register of the guest, it tells the hypervisor
that we're in such a critical section and thus may not receive any interrupts.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:48 +0000 (14:47 +0200)]
KVM: PPC: Implement hypervisor interface
To communicate with KVM directly we need to plumb some sort of interface
between the guest and KVM. Usually those interfaces use hypercalls.
This hypercall implementation is described in the last patch of the series
in a special documentation file. Please read that for further information.
This patch implements stubs to handle KVM PPC hypercalls on the host and
guest side alike.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:47 +0000 (14:47 +0200)]
KVM: PPC: Convert SPRG[0-4] to shared page
When in kernel mode there are 4 additional registers available that are
simple data storage. Instead of exiting to the hypervisor to read and
write those, we can just share them with the guest using the page.
This patch converts all users of the current field to the shared page.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:46 +0000 (14:47 +0200)]
KVM: PPC: Convert SRR0 and SRR1 to shared page
The SRR0 and SRR1 registers contain cached values of the PC and MSR
respectively. They get written to by the hypervisor when an interrupt
occurs or directly by the kernel. They are also used to tell the rfi(d)
instruction where to jump to.
Because it only gets touched on defined events that, it's very simple to
share with the guest. Hypervisor and guest both have full r/w access.
This patch converts all users of the current field to the shared page.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:45 +0000 (14:47 +0200)]
KVM: PPC: Convert DAR to shared page.
The DAR register contains the address a data page fault occured at. This
register behaves pretty much like a simple data storage register that gets
written to on data faults. There is no hypervisor interaction required on
read or write.
This patch converts all users of the current field to the shared page.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:44 +0000 (14:47 +0200)]
KVM: PPC: Convert DSISR to shared page
The DSISR register contains information about a data page fault. It is fully
read/write from inside the guest context and we don't need to worry about
interacting based on writes of this register.
This patch converts all users of the current field to the shared page.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:43 +0000 (14:47 +0200)]
KVM: PPC: Convert MSR to shared page
One of the most obvious registers to share with the guest directly is the
MSR. The MSR contains the "interrupts enabled" flag which the guest has to
toggle in critical sections.
So in order to bring the overhead of interrupt en- and disabling down, let's
put msr into the shared page. Keep in mind that even though you can fully read
its contents, writing to it doesn't always update all state. There are a few
safe fields that don't require hypervisor interaction. See the documentation
for a list of MSR bits that are safe to be set from inside the guest.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Thu, 29 Jul 2010 12:47:42 +0000 (14:47 +0200)]
KVM: PPC: Introduce shared page
For transparent variable sharing between the hypervisor and guest, I introduce
a shared page. This shared page will contain all the registers the guest can
read and write safely without exiting guest context.
This patch only implements the stubs required for the basic structure of the
shared page. The actual register moving follows.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Mohammed Gamal [Wed, 4 Aug 2010 11:41:04 +0000 (14:41 +0300)]
KVM: x86 emulator: Fix nop emulation
If a nop instruction is encountered, we jump directly to the done label.
This skip updating rip. Break from the switch case instead
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 12:40:19 +0000 (15:40 +0300)]
KVM: x86 emulator: Decode memory operands directly into a 'struct operand'
Since modrm operand can be either register or memory, decoding it into
a 'struct operand', which can represent both, is simpler.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 12:19:22 +0000 (15:19 +0300)]
KVM: x86 emulator: change invlpg emulation to use src.mem.addr
Instead of using modrm_ea, which will soon be gone.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 12:13:22 +0000 (15:13 +0300)]
KVM: x86 emulator: switch LEA to use SrcMem decoding
The NoAccess flag will prevent memory from being accessed.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 12:10:29 +0000 (15:10 +0300)]
KVM: x86 emulator: add NoAccess flag for memory instructions that skip access
Use for INVLPG, which accesses the tlb, not memory.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 11:25:22 +0000 (14:25 +0300)]
KVM: x86 emulator: use struct operand for mov reg,dr and mov dr,reg for reg op
This is an ordinary modrm source or destination; use the standard structure
representing it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 11:25:22 +0000 (14:25 +0300)]
KVM: x86 emulator: use struct operand for mov reg,cr and mov cr,reg for reg op
This is an ordinary modrm source or destination; use the standard structure
representing it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 11:48:44 +0000 (14:48 +0300)]
KVM: x86 emulator: mark mov cr and mov dr as 64-bit instructions in long mode
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 11:46:54 +0000 (14:46 +0300)]
KVM: x86 emulator: introduce Op3264 for mov cr and mov dr instructions
The operands for these instructions are 32 bits or 64 bits, depending on
long mode, and ignoring REX prefixes, or the operand size prefix.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 11:42:51 +0000 (14:42 +0300)]
KVM: x86 emulator: simplify REX.W check
(x && (x & y)) == (x & y)
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 10:53:19 +0000 (13:53 +0300)]
KVM: x86 emulator: drop use_modrm_ea
Unused (and has never been).
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 09:53:09 +0000 (12:53 +0300)]
KVM: x86 emulator: put register operand fetch into a function
The code is repeated three times, put it into fetch_register_operand()
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 09:41:59 +0000 (12:41 +0300)]
KVM: x86 emulator: use SrcAcc to simplify xchg decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 09:39:53 +0000 (12:39 +0300)]
KVM: x86 emulator: simplify xchg decode tables
Use X8() to avoid repetition.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 09:35:10 +0000 (12:35 +0300)]
KVM: x86 emulator: use correct type for memory address in operands
Currently we use a void pointer for memory addresses. That's wrong since
these are guest virtual addresses which are not directly dereferencable by
the host.
Use the correct type, unsigned long.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 09:07:29 +0000 (12:07 +0300)]
KVM: x86 emulator: push segment override out of decode_modrm()
Let it compute modrm_seg instead, and have the caller apply it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Joerg Roedel [Mon, 2 Aug 2010 14:46:45 +0000 (16:46 +0200)]
KVM: SVM: Check for asid != 0 on nested vmrun
This patch lets a nested vmrun fail if the L1 hypervisor
left the asid zero. This fixes the asid_zero unit test.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Joerg Roedel [Mon, 2 Aug 2010 14:46:44 +0000 (16:46 +0200)]
KVM: SVM: Check for nested vmrun intercept before emulating vmrun
This patch lets the nested vmrun fail if the L1 hypervisor
has not intercepted vmrun. This fixes the "vmrun intercept
check" unit test.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 2 Aug 2010 08:15:08 +0000 (16:15 +0800)]
KVM: MMU: mark page dirty only when page is really written
Mark page dirty only when this page is really written, it's more exacter,
and also can fix dirty page marking in speculation path
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 2 Aug 2010 08:14:04 +0000 (16:14 +0800)]
KVM: MMU: move bits lost judgement into a separate function
Introduce spte_has_volatile_bits() function to judge whether spte
bits will miss, it's more readable and can help us to cleanup code
later
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 2 Aug 2010 08:12:08 +0000 (16:12 +0800)]
KVM: MMU: using kvm_set_pfn_accessed() instead of mark_page_accessed()
It's a small cleanup that using using kvm_set_pfn_accessed() instead
of mark_page_accessed()
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Mon, 2 Aug 2010 09:47:51 +0000 (12:47 +0300)]
KVM: x86 emulator: check io permissions only once for string pio
Do not recheck io permission on every iteration.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 1 Aug 2010 15:35:24 +0000 (18:35 +0300)]
KVM: x86 emulator: fix LMSW able to clear cr0.pe
LMSW is documented not to be able to clear cr0.pe; make it so.
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Thu, 29 Jul 2010 12:11:52 +0000 (15:11 +0300)]
KVM: x86 emulator: don't update vcpu state if instruction is restarted
No need to update vcpu state since instruction is in the middle of the
emulation.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:55 +0000 (15:11 +0300)]
KVM: x86 emulator: convert some push instructions to direct decode
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:54 +0000 (15:11 +0300)]
KVM: x86 emulator: allow repeat macro arguments to contain commas
Needed for repeating instructions with execution functions.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:53 +0000 (15:11 +0300)]
KVM: x86 emulator: move decode tables downwards
So they can reference execution functions.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:52 +0000 (15:11 +0300)]
KVM: x86 emulator: move x86_decode_insn() downwards
No code changes.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:51 +0000 (15:11 +0300)]
KVM: x86 emulator: allow storing emulator execution function in decode tables
Instead of looking up the opcode twice (once for decode flags, once for
the big execution switch) look up both flags and function in the decode tables.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:50 +0000 (15:11 +0300)]
KVM: x86 emulator: store x86_emulate_ops in emulation context
It doesn't ever change, so we don't need to pass it around everywhere.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:49 +0000 (15:11 +0300)]
KVM: x86 emulator: move ByteOp and Dst back to bits 0:3
Now that the group index no longer exists, the space is free.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:48 +0000 (15:11 +0300)]
KVM: x86 emulator: drop support for old-style groups
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:47 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 9 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:46 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 8 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:45 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 7 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:44 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 5 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:43 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 4 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:42 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 3 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:41 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 1A to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:40 +0000 (15:11 +0300)]
KVM: x86 emulator: convert group 1 to new style
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:39 +0000 (15:11 +0300)]
KVM: x86 emulator: allow specifying group directly in opcode
Instead of having a group number, store the group table pointer directly in
the opcode.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:38 +0000 (15:11 +0300)]
KVM: x86 emulator: reserve group code 0
We'll be using that to distinguish between new-style and old-style groups.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:37 +0000 (15:11 +0300)]
KVM: x86 emulator: move group tables to top
No code changes.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:36 +0000 (15:11 +0300)]
KVM: x86 emulator: Add wrappers for easily defining opcodes
Once 'struct opcode' grows, its initializer will become more complicated.
Wrap the simple initializers in a D() macro, and replace the empty initializers
with an even simpler N macro.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:35 +0000 (15:11 +0300)]
KVM: x86 emulator: introduce 'struct opcode'
This will hold all the information known about the opcode. Currently, this
is just the decode flags.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Thu, 29 Jul 2010 12:11:34 +0000 (15:11 +0300)]
KVM: x86 emulator: drop parentheses in repreat macros
The parenthese make is impossible to use the macros with initializers that
require braces.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Mohammed Gamal [Wed, 28 Jul 2010 09:38:40 +0000 (12:38 +0300)]
KVM: x86 emulator: Add IRET instruction
Ths patch adds IRET instruction (opcode 0xcf).
Currently, only IRET in real mode is emulated. Protected mode support is to be added later if needed.
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Reviewed-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Joerg Roedel [Tue, 27 Jul 2010 16:14:21 +0000 (18:14 +0200)]
KVM: SVM: Emulate next_rip svm feature
This patch implements the emulations of the svm next_rip
feature in the nested svm implementation in kvm.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Joerg Roedel [Tue, 27 Jul 2010 16:14:20 +0000 (18:14 +0200)]
KVM: SVM: Sync efer back into nested vmcb
This patch fixes a bug in a nested hypervisor that heavily
switches between real-mode and long-mode. The problem is
fixed by syncing back efer into the guest vmcb on emulated
vmexit.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Xiao Guangrong [Tue, 27 Jul 2010 03:21:18 +0000 (11:21 +0800)]
KVM: MMU: remove valueless output message
After commit
53383eaad08d, the '*spte' has updated before call
rmap_remove()(in most case it's 'shadow_trap_nonpresent_pte'), so
remove this information from error message
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 15:32:39 +0000 (18:32 +0300)]
KVM: VMX: Use host_gdt variable wherever we need the host gdt
Now that we have the host gdt conveniently stored in a variable, make use
of it instead of querying the cpu.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:51 +0000 (14:37 +0300)]
KVM: x86 emulator: unify the two Group 3 variants
Use just one group table for byte (F6) and word (F7) opcodes.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:50 +0000 (14:37 +0300)]
KVM: x86 emulator: Allow LOCK prefix for NEG and NOT
Opcodes F6/2, F6/3, F7/2, F7/3.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:49 +0000 (14:37 +0300)]
KVM: x86 emulator: simplify Group 1 decoding
Move operand decoding to the opcode table, keep lock decoding in the group
table. This allows us to get consolidate the four variants of Group 1 into one
group.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:48 +0000 (14:37 +0300)]
KVM: x86 emulator: mix decode bits from opcode and group decode tables
Allow bits that are common to all members of a group to be specified in the
opcode table instead of the group table. This allows some simplification
of the decode tables.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:47 +0000 (14:37 +0300)]
KVM: x86 emulator: add Undefined decode flag
Add a decode flag to indicate the instruction is invalid. Will come in useful
later, when we mix decode bits from the opcode and group table.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:46 +0000 (14:37 +0300)]
KVM: x86 emulator: Make group storage bits separate from operand bits
Currently group bits are stored in bits 0:7, where operand bits are stored.
Make group bits be 0:3, and move the existing bits 0:3 to 16:19, so we can
mix group and operand bits.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:45 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate Jcc rel32 decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:44 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate CMOVcc decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:43 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate MOV reg, imm decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:42 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate Jcc rel8 decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:41 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate push/pop reg decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:40 +0000 (14:37 +0300)]
KVM: x86 emulator: consolidate inc/dec reg decoding
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 26 Jul 2010 11:37:39 +0000 (14:37 +0300)]
KVM: x86 emulator: add macros for repetitive instructions
Some instructions are repetitive in the opcode space, add macros for
consolidating them.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Sun, 25 Jul 2010 11:51:16 +0000 (14:51 +0300)]
KVM: x86 emulator: fix handling for unemulated instructions
If an instruction is present in the decode tables but not in the execution
switch, it will be emulated as a NOP. An example is IRET (0xcf).
Fix by adding default: labels to the execution switches.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Linus Torvalds [Wed, 20 Oct 2010 16:00:44 +0000 (09:00 -0700)]
Merge branch 'kvm-updates/2.6.36' of git://git./virt/kvm/kvm
* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: Fix fs/gs reload oops with invalid ldt
Linus Torvalds [Tue, 19 Oct 2010 17:10:20 +0000 (10:10 -0700)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: avivo cursor workaround applies to evergreen as well
Avi Kivity [Tue, 19 Oct 2010 14:46:55 +0000 (16:46 +0200)]
KVM: Fix fs/gs reload oops with invalid ldt
kvm reloads the host's fs and gs blindly, however the underlying segment
descriptors may be invalid due to the user modifying the ldt after loading
them.
Fix by using the safe accessors (loadsegment() and load_gs_index()) instead
of home grown unsafe versions.
This is CVE-2010-3698.
KVM-Stable-Tag.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Linus Torvalds [Mon, 18 Oct 2010 20:10:36 +0000 (13:10 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/upstream-linus
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus:
MIPS: Enable ISA_DMA_API config to fix build failure
MIPS: 32-bit: Fix build failure in asm/fcntl.h
MIPS: Remove all generated vmlinuz* files on "make clean"
MIPS: do_sigaltstack() expects userland pointers
MIPS: Fix error values in case of bad_stack
MIPS: Sanitize restart logics
MIPS: secure_computing, syscall audit: syscall number should in r2, not r0.
MIPS: Don't block signals if we'd failed to setup a sigframe
Linus Torvalds [Mon, 18 Oct 2010 20:10:08 +0000 (13:10 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: evdev - fix EVIOCSABS regression
Input: evdev - fix Ooops in EVIOCGABS/EVIOCSABS
Linus Torvalds [Mon, 18 Oct 2010 20:09:26 +0000 (13:09 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: ohci: fix TI TSB82AA2 regression since 2.6.35
Sascha Hauer [Mon, 18 Oct 2010 08:16:26 +0000 (10:16 +0200)]
mxc_nand: do not depend on disabling the irq in the interrupt handler
This patch reverts the driver to enabling/disabling the NFC interrupt
mask rather than enabling/disabling the system interrupt. This cleans
up the driver so that it doesn't rely on interrupts being disabled
within the interrupt handler.
For i.MX21 we keep the current behaviour, that is calling
enable_irq/disable_irq_nosync to enable/disable interrupts. This patch
is based on earlier work by John Ogness.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: John Ogness <john.ogness@linutronix.de>
Tested-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 18 Oct 2010 20:05:10 +0000 (13:05 -0700)]
Merge branch 'for-linus/i2c/2636-rc8' of git://git.fluff.org/bjdooks/linux
* 'for-linus/i2c/2636-rc8' of git://git.fluff.org/bjdooks/linux:
i2c-imx: do not allow interruptions when waiting for I2C to complete
i2c-davinci: Fix TX setup for more SoCs
Linus Torvalds [Mon, 18 Oct 2010 20:04:33 +0000 (13:04 -0700)]
Merge branch 'fixes'
* fixes:
v4l1: fix 32-bit compat microcode loading translation
De-pessimize rds_page_copy_user
Namhyung Kim [Mon, 18 Oct 2010 03:55:21 +0000 (12:55 +0900)]
MIPS: Enable ISA_DMA_API config to fix build failure
Add ISA_DMA_API config item and select it when GENERIC_ISA_DMA enabled.
This fixes build failure on allmodconfig like following:
CC sound/isa/es18xx.o
sound/isa/es18xx.c: In function 'snd_es18xx_playback1_prepare':
sound/isa/es18xx.c:501:9: error: implicit declaration of function 'snd_dma_program'
sound/isa/es18xx.c: In function 'snd_es18xx_playback_pointer':
sound/isa/es18xx.c:818:3: error: implicit declaration of function 'snd_dma_pointer'
make[3]: *** [sound/isa/es18xx.o] Error 1
make[2]: *** [sound/isa/es18xx.o] Error 2
make[1]: *** [sub-make] Error 2
make: *** [all] Error 2
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1717/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Namhyung Kim [Sun, 17 Oct 2010 16:41:39 +0000 (01:41 +0900)]
MIPS: 32-bit: Fix build failure in asm/fcntl.h
CC security/integrity/ima/ima_fs.o
In file included from linux/include/linux/fcntl.h:4:0,
from linux/security/integrity/ima/ima_fs.c:18:
linux/arch/mips/include/asm/fcntl.h:63:2: error: expected specifier-qualifier-list before 'off_t'
make[3]: *** [security/integrity/ima/ima_fs.o] Error 1
make[2]: *** [security/integrity/ima/ima_fs.o] Error 2
make[1]: *** [sub-make] Error 2
make: *** [all] Error 2
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1715/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Wu Zhangjin [Wed, 22 Sep 2010 06:03:57 +0000 (14:03 +0800)]
MIPS: Remove all generated vmlinuz* files on "make clean"
[Ralf: I changed the patch to explicitly list all files to be deleted out
of paranoia.]
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/1590/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Tue, 28 Sep 2010 17:50:57 +0000 (18:50 +0100)]
MIPS: do_sigaltstack() expects userland pointers
o32 compat does the right thing, native and n32 compat do not...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Tue, 28 Sep 2010 17:50:47 +0000 (18:50 +0100)]
MIPS: Fix error values in case of bad_stack
We want EFAULT, not -<syscall number>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1699/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Tue, 28 Sep 2010 17:50:37 +0000 (18:50 +0100)]
MIPS: Sanitize restart logics
Put the original syscall number into ->regs[0] when we leave syscall
with error. Use it in restart logics. Everything else will have
it 0 since we pass through SAVE_SOME on all the ways in. Note that
in places like bad_stack and inllegal_syscall we leave it 0 - it's not
restartable.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1698/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Tue, 28 Sep 2010 17:50:27 +0000 (18:50 +0100)]
MIPS: secure_computing, syscall audit: syscall number should in r2, not r0.
As it is, audit_syscall_entry() and secure_computing() get the
bogus value (0, in fact)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1697/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Al Viro [Tue, 28 Sep 2010 17:50:17 +0000 (18:50 +0100)]
MIPS: Don't block signals if we'd failed to setup a sigframe
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1696/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Daniel Mack [Mon, 18 Oct 2010 15:43:50 +0000 (08:43 -0700)]
Input: evdev - fix EVIOCSABS regression
448cd16 ("Input: evdev - rearrange ioctl handling") broke EVIOCSABS by
checking for the wrong direction bit.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Tested-by: Sven Neumann <s.neumann@raumfeld.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Daniel Mack [Mon, 18 Oct 2010 15:43:30 +0000 (08:43 -0700)]
Input: evdev - fix Ooops in EVIOCGABS/EVIOCSABS
This fixes a regression introduced by the dynamic allocation of absinfo
for input devices. We need to bail out early for input devices which
don't have absolute axis.
[ 929.664303] Pid: 2989, comm: input Not tainted 2.6.36-rc8+ #14 MS-7260/MS-7260
[ 929.664318] EIP: 0060:[<
c12bdc01>] EFLAGS:
00010246 CPU: 0
[ 929.664331] EIP is at evdev_ioctl+0x4f8/0x59f
[ 929.664341] EAX:
00000040 EBX:
00000000 ECX:
00000006 EDX:
f45a1efc
[ 929.664355] ESI:
00000000 EDI:
f45a1efc EBP:
f45a1f24 ESP:
f45a1eb8
[ 929.664369] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 929.664402]
f470da74 f6a30e78 f462c240 00000018 bfe4a260 00000000 f45b06fc 00000000
[ 929.664429] <0>
000000c4 b769d000 c3544620 f470da74 f45b06fc f45b06fc f45a1f38 c107dd1f
[ 929.664458] <0>
f4710b74 000000c4 00000000 00000000 00000000 0000029d 00000a74 f4710b74
[ 929.664500] [<
c107dd1f>] ? handle_mm_fault+0x2be/0x59a
[ 929.664513] [<
c12bd709>] ? evdev_ioctl+0x0/0x59f
[ 929.664524] [<
c1099d30>] ? do_vfs_ioctl+0x494/0x4d9
[ 929.664538] [<
c10432a1>] ? up_read+0x16/0x29
[ 929.664550] [<
c101c818>] ? do_page_fault+0x2ff/0x32d
[ 929.664564] [<
c108d048>] ? do_sys_open+0xc5/0xcf
[ 929.664575] [<
c1099db6>] ? sys_ioctl+0x41/0x61
[ 929.664587] [<
c1002710>] ? sysenter_do_call+0x12/0x36
[ 929.684570] ---[ end trace
11b83e923bd8f2bb ]---
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Marc Kleine-Budde [Mon, 21 Jun 2010 07:27:05 +0000 (09:27 +0200)]
i2c-imx: do not allow interruptions when waiting for I2C to complete
The i2c_imx_trx_complete() function is using
wait_event_interruptible_timeout() to wait for the I2C controller to
signal that it has completed an I2C bus operation. If the process that
causes the I2C operation receives a signal, the wait will be
interrupted, returning an error. It is better to let the I2C operation
finished before handling the signal (i.e. returning into userspace).
It is safe to use wait_event_timeout() instead, because the timeout
will allow the process to exit if the I2C bus hangs. It's also better
to allow the I2C operation to finish, because unacknowledged I2C
operations can cause the I2C bus to hang.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Jon Povey [Tue, 12 Oct 2010 04:47:05 +0000 (13:47 +0900)]
i2c-davinci: Fix TX setup for more SoCs
This patch is an improvement to
4bba0fd8d1c6d405df666e2573e1a1f917098be0
which got to mainline a little early.
Sudhakar Rajashekhara explains that at least OMAP-L138 requires MDR mode
settings before DXR for correct behaviour, so load MDR first with
STT cleared and later load again with STT set.
Tested on DM355 connected to Techwell TW2836 and Wolfson WM8985
Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Acked-by: Troy Kisky <troy.kisky@boundarydevices.com>
Tested-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Alex Deucher [Thu, 14 Oct 2010 21:14:57 +0000 (17:14 -0400)]
drm/radeon/kms: avivo cursor workaround applies to evergreen as well
Fixes cursor corruption in certain cases.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
projects / platform / kernel / linux-amlogic.git / log