Aneesh Kumar K.V [Tue, 8 Dec 2020 03:15:39 +0000 (08:45 +0530)]
powerpc/book3s64/kuap: Improve error reporting with KUAP
This partially reverts commit
eb232b162446 ("powerpc/book3s64/kuap: Improve
error reporting with KUAP") and update the fault handler to print
[ 55.022514] Kernel attempted to access user page (
7e6725b70000) - exploit attempt? (uid: 0)
[ 55.022528] BUG: Unable to handle kernel data access on read at 0x7e6725b70000
[ 55.022533] Faulting instruction address: 0xc000000000e8b9bc
[ 55.022540] Oops: Kernel access of bad area, sig: 11 [#1]
....
when the kernel access userspace address without unlocking AMR.
bad_kuap_fault() is added as part of commit
5e5be3aed230 ("powerpc/mm: Detect
bad KUAP faults") to catch userspace access incorrectly blocked by AMR. Hence
retain the full stack dump there even with hash translation. Also, add a comment
explaining the difference between hash and radix.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201208031539.84878-1-aneesh.kumar@linux.ibm.com
Jordan Niethe [Mon, 7 Dec 2020 01:05:19 +0000 (12:05 +1100)]
powerpc/powernv/idle: Restore CIABR after idle for Power9
On Power9, CIABR is lost after idle. This means that instruction
breakpoints set by xmon which use CIABR do not work. Fix this by
restoring CIABR after idle.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201207010519.15597-2-jniethe5@gmail.com
Jordan Niethe [Mon, 7 Dec 2020 01:05:18 +0000 (12:05 +1100)]
powerpc/book3s64/kexec: Clear CIABR on kexec
The value in CIABR persists across kexec which can lead to unintended
results when the new kernel hits the old kernel's breakpoint. For
example:
0:mon> bi $loadavg_proc_show
0:mon> b
type address
1 inst
c000000000519060 loadavg_proc_show+0x0/0x130
0:mon> x
$ kexec -l /mnt/vmlinux --initrd=/mnt/rootfs.cpio.gz --append='xmon=off'
$ kexec -e
$ cat /proc/loadavg
Trace/breakpoint trap
Make sure CIABR is cleared so this does not happen.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201207010519.15597-1-jniethe5@gmail.com
Christophe Leroy [Tue, 17 Nov 2020 05:07:59 +0000 (05:07 +0000)]
powerpc: Remove ucache_bsize
ppc601 and e200 were the users of ucache_bsize.
ppc601 and e200 are now gone.
Remove ucache_bsize.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/288b6048597c0fdc495b203fda57a223d89499d2.1605589460.git.christophe.leroy@csgroup.eu
Christophe Leroy [Tue, 17 Nov 2020 05:07:58 +0000 (05:07 +0000)]
powerpc: Retire e200 core (mpc555x processor)
There is no defconfig selecting CONFIG_E200, and no platform.
e200 is an earlier version of booke, a predecessor of e500,
with some particularities like an unified cache instead of both an
instruction cache and a data cache.
Remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Scott Wood <oss@buserror.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/34ebc3ba2c768d97f363bd5f2deea2356e9ae127.1605589460.git.christophe.leroy@csgroup.eu
Christophe Leroy [Thu, 22 Oct 2020 09:29:21 +0000 (09:29 +0000)]
powerpc: Fix update form addressing in inline assembly
In several places, inline assembly uses the "%Un" modifier
to enable the use of instruction with update form addressing,
but the associated "<>" constraint is missing.
As mentioned in previous patch, this fails with gcc 4.9, so
"<>" can't be used directly.
Use UPD_CONSTR macro everywhere %Un modifier is used.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/62eab5ca595485c192de1765bdac099f633a21d0.1603358942.git.christophe.leroy@csgroup.eu
Mathieu Desnoyers [Thu, 22 Oct 2020 09:29:20 +0000 (09:29 +0000)]
powerpc: Fix incorrect stw{, ux, u, x} instructions in __set_pte_at
The placeholder for instruction selection should use the second
argument's operand, which is %1, not %0. This could generate incorrect
assembly code if the memory addressing of operand %0 is a different
form from that of operand %1.
Also remove the %Un placeholder because having %Un placeholders
for two operands which are based on the same local var (ptep) doesn't
make much sense. By the way, it doesn't change the current behaviour
because "<>" constraint is missing for the associated "=m".
[chleroy: revised commit log iaw segher's comments and removed %U0]
Fixes:
9bf2b5cdc5fe ("powerpc: Fixes for CONFIG_PTE_64BIT for SMP support")
Cc: <stable@vger.kernel.org> # v2.6.28+
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/96354bd77977a6a933fe9020da57629007fdb920.1603358942.git.christophe.leroy@csgroup.eu
Christophe Leroy [Fri, 4 Dec 2020 10:35:38 +0000 (10:35 +0000)]
powerpc/xmon: Change printk() to pr_cont()
Since some time now, printk() adds carriage return, leading to
unusable xmon output if there is no udbg backend available:
[ 54.288722] sysrq: Entering xmon
[ 54.292209] Vector: 0 at [
cace3d2c]
[ 54.292274] pc:
[ 54.292331]
c0023650
[ 54.292468] : xmon+0x28/0x58
[ 54.292519]
[ 54.292574] lr:
[ 54.292630]
c0023724
[ 54.292749] : sysrq_handle_xmon+0xa4/0xfc
[ 54.292801]
[ 54.292867] sp:
cace3de8
[ 54.292931] msr: 9032
[ 54.292999] current = 0xc28d0000
[ 54.293072] pid = 377, comm = sh
[ 54.293157] Linux version 5.10.0-rc6-s3k-dev-01364-gedf13f0ccd76-dirty (root@po17688vm.idsi0.si.c-s.fr) (powerpc64-linux-gcc (GCC) 10.1.0, GNU ld (GNU Binutils) 2.34) #4211 PREEMPT Fri Dec 4 09:32:11 UTC 2020
[ 54.293287] enter ? for help
[ 54.293470] [
cace3de8]
[ 54.293532]
c0023724
[ 54.293654] sysrq_handle_xmon+0xa4/0xfc
[ 54.293711] (unreliable)
...
[ 54.296002]
[ 54.296159] --- Exception: c01 (System Call) at
[ 54.296217]
0fd4e784
[ 54.296303]
[ 54.296375] SP (
7fca6ff0) is in userspace
[ 54.296431] mon>
[ 54.296484] <no input ...>
Use pr_cont() instead.
Fixes:
4bcc595ccd80 ("printk: reinstate KERN_CONT for printing continuation lines")
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Mention that it only happens when udbg is not available]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c8a6ec704416ecd5ff2bd26213c9bc026bdd19de.1607077340.git.christophe.leroy@csgroup.eu
Alexey Kardashevskiy [Sun, 22 Nov 2020 07:38:28 +0000 (18:38 +1100)]
powerpc/powernv/npu: Do not attempt NPU2 setup on POWER8NVL NPU
We execute certain NPU2 setup code (such as mapping an LPID to a device
in NPU2) unconditionally if an Nvlink bridge is detected. However this
cannot succeed on POWER8NVL machines and errors appear in dmesg. This is
harmless as skiboot returns an error and the only place we check it is
vfio-pci but that code does not get called on P8+ either.
This adds a check if pnv_npu2_xxx helpers are called on a machine with
NPU2 which initializes pnv_phb::npu in pnv_npu2_init();
pnv_phb::npu==NULL on POWER8/NVL (Naples).
While at this, fix NULL derefencing in pnv_npu_peers_take_ownership/
pnv_npu_peers_release_ownership which occurs when GPUs on mentioned P8s
cause EEH which happens if "vfio-pci" disables devices using
the D3 power state; the vfio-pci's disable_idle_d3 module parameter
controls this and must be set on Naples. The EEH handling clears
the entire pnv_ioda_pe struct in pnv_ioda_free_pe() hence
the NULL derefencing. We cannot recover from that but at least we stop
crashing.
Tested on
- POWER9 pvr=
004e1201, Ubuntu 19.04 host, Ubuntu 18.04 vm,
NVIDIA GV100 10de:1db1 driver 418.39
- POWER8 pvr=
004c0100, RHEL 7.6 host, Ubuntu 16.10 vm,
NVIDIA P100 10de:15f9 driver 396.47
Fixes:
1b785611e119 ("powerpc/powernv/npu: Add release_ownership hook")
Cc: stable@vger.kernel.org # 5.0
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201122073828.15446-1-aik@ozlabs.ru
Ganesh Goudar [Mon, 30 Nov 2020 08:30:57 +0000 (14:00 +0530)]
lkdtm/powerpc: Add SLB multihit test
To check machine check handling, add support to inject slb
multihit errors.
Co-developed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
[mpe: Use CONFIG_PPC_BOOK3S_64 to fix compile errors reported by lkp@intel.com]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201130083057.135610-1-ganeshgr@linux.ibm.com
Oliver O'Halloran [Thu, 9 Apr 2020 06:13:37 +0000 (16:13 +1000)]
powernv/pci: Print an error when device enable is blocked
If the platform decides to block enabling the device nothing is printed
currently. This can lead to some confusion since the dmesg output will
usually print an error with no context e.g.
e1000e: probe of 0022:01:00.0 failed with error -22
This shouldn't be spammy since pci_enable_device() already prints a
messages when it succeeds.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200409061337.9187-1-oohall@gmail.com
Oliver O'Halloran [Wed, 2 Dec 2020 00:52:22 +0000 (11:52 +1100)]
powerpc/pci: Remove LSI mappings on device teardown
When a passthrough IO adapter is removed from a pseries machine using hash
MMU and the XIVE interrupt mode, the POWER hypervisor expects the guest OS
to clear all page table entries related to the adapter. If some are still
present, the RTAS call which isolates the PCI slot returns error 9001
"valid outstanding translations" and the removal of the IO adapter fails.
This is because when the PHBs are scanned, Linux maps automatically the
INTx interrupts in the Linux interrupt number space but these are never
removed.
This problem can be fixed by adding the corresponding unmap operation when
the device is removed. There's no pcibios_* hook for the remove case, but
the same effect can be achieved using a bus notifier.
Because INTx are shared among PHBs (and potentially across the system),
this adds tracking of virq to unmap them only when the last user is gone.
[aik: added refcounter]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202005222.5477-1-aik@ozlabs.ru
Daniel Axtens [Thu, 3 Dec 2020 04:28:07 +0000 (15:28 +1100)]
powerpc: add security.config, enforcing lockdown=integrity
It's sometimes handy to have a config that boots a bit like a system
under secure boot (forcing lockdown=integrity, without needing any
extra stuff like a command line option).
This config file allows that, and also turns on a few assorted security
and hardening options for good measure.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201203042807.1293655-1-dja@axtens.net
Christophe Leroy [Sun, 18 Oct 2020 17:25:18 +0000 (17:25 +0000)]
powerpc/44x: Don't support 47x code and non 47x code at the same time
440/460 variants and 470 variants are not compatible, no
need to make code supporting both and using MMU features.
Just use CONFIG_PPC_47x to decide what to build.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c3e64da3d5d068c69a201e03bbae7da055761e5b.1603041883.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 18 Oct 2020 17:25:17 +0000 (17:25 +0000)]
powerpc/44x: Don't support 440 when CONFIG_PPC_47x is set
As stated in platform/44x/Kconfig, CONFIG_PPC_47x is not
compatible with 440 and 460 variants.
This is confirmed in asm/cache.h as L1_CACHE_SHIFT is different
for 47x, meaning a kernel built for 47x will not run correctly
on a 440.
In cputable, opt out all 440 and 460 variants when CONFIG_PPC_47x
is set. Also add a default match dedicated to 470.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/822833ce3dc10634339818f7d1ab616edf63b0c6.1603041883.git.christophe.leroy@csgroup.eu
Christophe Leroy [Tue, 13 Oct 2020 11:11:21 +0000 (11:11 +0000)]
powerpc/feature: Remove CPU_FTR_NODSISRALIGN
CPU_FTR_NODSISRALIGN has not been used since
commit
31bfdb036f12 ("powerpc: Use instruction emulation
infrastructure to handle alignment faults")
Remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/05d98136b24bbf11525445414bb18cffe2724f48.1602587470.git.christophe.leroy@csgroup.eu
Christophe Leroy [Mon, 12 Oct 2020 08:04:24 +0000 (08:04 +0000)]
powerpc/mm: Desintegrate MMU_FTR_PPCAS_ARCH_V2
MMU_FTR_PPCAS_ARCH_V2 is defined in cpu_table.h
as MMU_FTR_TLBIEL | MMU_FTR_16M_PAGE.
MMU_FTR_TLBIEL and MMU_FTR_16M_PAGE are defined in mmu.h
MMU_FTR_PPCAS_ARCH_V2 is used only in mmu.h and it is used only once.
Remove MMU_FTR_PPCAS_ARCH_V2 and use
directly MMU_FTR_TLBIEL | MMU_FTR_16M_PAGE
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/829ae1aed1d2fc6b5fc5818362e573dee5d6ecde.1602489852.git.christophe.leroy@csgroup.eu
Christophe Leroy [Mon, 12 Oct 2020 08:05:49 +0000 (08:05 +0000)]
powerpc/mm: MMU_FTR_NEED_DTLB_SW_LRU is only possible with CONFIG_PPC_83xx
Only mpc83xx will set MMU_FTR_NEED_DTLB_SW_LRU and its
definition is enclosed in #ifdef CONFIG_PPC_83xx.
Make MMU_FTR_NEED_DTLB_SW_LRU possible only when
CONFIG_PPC_83xx is set.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d01d7613664fafa43de1f1ae89924075bc24241c.1602489931.git.christophe.leroy@csgroup.eu
Christophe Leroy [Mon, 12 Oct 2020 08:02:30 +0000 (08:02 +0000)]
powerpc/mm: Remove useless #ifndef CPU_FTR_COHERENT_ICACHE in mem.c
Since commit
10b35d9978ac ("[PATCH] powerpc: merged asm/cputable.h"),
CPU_FTR_COHERENT_ICACHE has always been defined.
Remove the #ifndef CPU_FTR_COHERENT_ICACHE block.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e26ddc1d6f6aca739dd8d2b7c67351ead559b084.1602489664.git.christophe.leroy@csgroup.eu
Christophe Leroy [Mon, 12 Oct 2020 08:02:13 +0000 (08:02 +0000)]
powerpc/feature: Add CPU_FTR_NOEXECUTE to G2_LE
G2_LE has a 603 core, add CPU_FTR_NOEXECUTE.
Fixes:
385e89d5b20f ("powerpc/mm: add exec protection on powerpc 603")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/39a530ee41d83f49747ab3af8e39c056450b9b4d.1602489653.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sat, 10 Oct 2020 17:30:59 +0000 (17:30 +0000)]
powerpc/mm: Fix verification of MMU_FTR_TYPE_44x
MMU_FTR_TYPE_44x cannot be checked by cpu_has_feature()
Use mmu_has_feature() instead
Fixes:
23eb7f560a2a ("powerpc: Convert flush_icache_range & friends to C")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ceede82fadf37f3b8275e61fcf8cf29a3e2ec7fe.1602351011.git.christophe.leroy@csgroup.eu
Christophe Leroy [Thu, 1 Oct 2020 10:59:20 +0000 (10:59 +0000)]
powerpc/time: Remove ifdef in get_vtb()
SPRN_VTB and CPU_FTR_ARCH_207S are always defined,
no need of an ifdef.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a0fc81cd85121407726bcf480fc9a0d8e7617fce.1601549933.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:53 +0000 (07:10 +0000)]
powerpc/32: Use SPRN_SPRG_SCRATCH2 in exception prologs
Use SPRN_SPRG_SCRATCH2 as a third scratch register in
exception prologs in order to simplify them and avoid
data going back and forth from/to CR.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6f5c8a7faa8cc54acb89c55c20aa579a2f30a4e9.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:52 +0000 (07:10 +0000)]
powerpc/32s: Use SPRN_SPRG_SCRATCH2 in DSI prolog
Use SPRN_SPRG_SCRATCH2 as an alternative scratch register in
the early part of DSI prolog in order to avoid clobbering
SPRN_SPRG_SCRATCH0/1 used by other prologs.
The 603 doesn't like a jump from DataLoadTLBMiss to the 10 nops
that are now in the beginning of DSI exception as a result of
the feature section. To workaround this, add a jump as alternative.
It also avoids fetching 10 nops for nothing.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f9f8df2a2be93568768ef1ac793639f7914cf103.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:51 +0000 (07:10 +0000)]
powerpc/32: Simplify EXCEPTION_PROLOG_1 macro
Make code more readable with a clear CONFIG_VMAP_STACK
section and a clear non CONFIG_VMAP_STACK section.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c0f16cf432d22fc80097264d94649460d3dd761d.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:50 +0000 (07:10 +0000)]
powerpc/603: Use SPRN_SDR1 to store the pgdir phys address
On the 603, SDR1 is not used.
In order to free SPRN_SPRG2, use SPRN_SDR1 to store the pgdir
phys addr.
But only some bits of SDR1 can be used (0xffff01ff).
As the pgdir is 4k aligned, rotate it by 4 bits to the left.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7370574b49d8476878ce5480726197993cb76108.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:49 +0000 (07:10 +0000)]
powerpc/32s: Don't use SPRN_SPRG_PGDIR in hash_page
SPRN_SPRG_PGDIR is there mainly to speedup SW TLB miss handlers
for powerpc 603.
We need to free SPRN_SPRG2 to reduce the mess with CONFIG_VMAP_STACK.
In hash_page(), reading PGDIR from thread_struct will be in the noise
performance wise.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4adca19b7120cdf619956768ed09e74fc6a558f3.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:48 +0000 (07:10 +0000)]
powerpc/32s: Fix an FTR_SECTION_ELSE
An FTR_SECTION_ELSE is in the middle of
BEGIN_MMU_FTR_SECTION/ALT_MMU_FTR_SECTION_END_IFSET
Change it to MMU_FTR_SECTION_ELSE
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/61790f1a91692950a6bb5bb53d6d514d9bcdad74.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:47 +0000 (07:10 +0000)]
powerpc/32s: Don't hash_preload() kernel text
We now always map kernel text with BATs. Neither need to preload
hash with kernel text addresses nor ensure they are never evicted.
This is more or less a revert of commit
ee4f2ea48674 ("[POWERPC] Fix
32-bit mm operations when not using BATs")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0a0bab7fadd89aa829e33420fbc10d60c59040a7.1606285014.git.christophe.leroy@csgroup.eu
Christophe Leroy [Wed, 25 Nov 2020 07:10:46 +0000 (07:10 +0000)]
powerpc/32s: Always map kernel text and rodata with BATs
Since commit
2b279c0348af ("powerpc/32s: Allow mapping with BATs with
DEBUG_PAGEALLOC"), there is no real situation where mapping without
BATs is required.
In order to simplify memory handling, always map kernel text
and rodata with BATs even when "nobats" kernel parameter is set.
Also fix the 603 TLB miss exceptions that don't require anymore
kernel page table if DEBUG_PAGEALLOC.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/da51f7ec632825a4ce43290a904aad61648408c0.1606285013.git.christophe.leroy@csgroup.eu
Christophe Lombard [Wed, 25 Nov 2020 15:50:13 +0000 (16:50 +0100)]
ocxl: Add new kernel traces
Add specific kernel traces which provide information on mmu notifier and on
pages range.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-6-clombard@linux.vnet.ibm.com
Christophe Lombard [Wed, 25 Nov 2020 15:50:12 +0000 (16:50 +0100)]
ocxl: Add mmu notifier
Add invalidate_range mmu notifier, when required (ATSD access of MMIO
registers is available), to initiate TLB invalidation commands.
For the time being, the ATSD0 set of registers is used by default.
The pasid and bdf values have to be configured in the Process Element
Entry.
The PEE must be set up to match the BDF/PASID of the AFU.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-5-clombard@linux.vnet.ibm.com
Christophe Lombard [Wed, 25 Nov 2020 15:50:11 +0000 (16:50 +0100)]
ocxl: Update the Process Element Entry
To complete the MMIO based mechanism, the fields: PASID, bus, device and
function of the Process Element Entry have to be filled. (See
OpenCAPI Power Platform Architecture document)
Hypervisor Process Element Entry
Word
0 1 .... 7 8 ...... 12 13 ..15 16.... 19 20 ........... 31
0 OSL Configuration State (0:31)
1 OSL Configuration State (32:63)
2 PASID | Reserved
3 Bus | Device |Function | Reserved
4 Reserved
5 Reserved
6 ....
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-4-clombard@linux.vnet.ibm.com
Christophe Lombard [Wed, 25 Nov 2020 15:50:10 +0000 (16:50 +0100)]
ocxl: Initiate a TLB invalidate command
When a TLB Invalidate is required for the Logical Partition, the following
sequence has to be performed:
1. Load MMIO ATSD AVA register with the necessary value, if required.
2. Write the MMIO ATSD launch register to initiate the TLB Invalidate
command.
3. Poll the MMIO ATSD status register to determine when the TLB Invalidate
has been completed.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-3-clombard@linux.vnet.ibm.com
Christophe Lombard [Wed, 25 Nov 2020 15:50:09 +0000 (16:50 +0100)]
ocxl: Assign a register set to a Logical Partition
Platform specific function to assign a register set to a Logical Partition.
The "ibm,mmio-atsd" property, provided by the firmware, contains the 16
base ATSD physical addresses (ATSD0 through ATSD15) of the set of MMIO
registers (XTS MMIO ATSDx LPARID/AVA/launch/status register).
For the time being, the ATSD0 set of registers is used by default.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201125155013.39955-2-clombard@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:44 +0000 (11:54 -0500)]
powerpc/perf: MMCR0 control for PMU registers under PMCC=00
PowerISA v3.1 introduces new control bit (PMCCEXT) for restricting
access to group B PMU registers in problem state when
MMCR0 PMCC=0b00. In problem state and when MMCR0 PMCC=0b00,
setting the Monitor Mode Control Register bit 54 (MMCR0 PMCCEXT),
will restrict read permission on Group B Performance Monitor
Registers (SIER, SIAR, SDAR and MMCR1). When this bit is set to zero,
group B registers will be readable. In other platforms (like power9),
the older behaviour is retained where group B PMU SPRs are readable.
Patch adds support for MMCR0 PMCCEXT bit in power10 by enabling
this bit during boot and during the PMU event enable/disable callback
functions.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-8-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:43 +0000 (11:54 -0500)]
powerpc/perf: Fix to update cache events with l2l3 events in power10
Export l2l3 events (PM_L2_ST_MISS and PM_L2_ST) and LLC-prefetches
(PM_L3_PF_MISS_L3) via sysfs, and also add these to list of
cache_events.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-7-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:42 +0000 (11:54 -0500)]
powerpc/perf: Fix to update generic event codes for power10
Fix the event code for events: branch-instructions (to PM_BR_FIN),
branch-misses (to PM_MPRED_BR_FIN) and cache-misses (to
PM_LD_DEMAND_MISS_L1_FIN) for power10 PMU. Update the
list of generic events with this modified event code.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-6-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:41 +0000 (11:54 -0500)]
powerpc/perf: Add generic and cache event list for power10 DD1
There are event code updates for some of the generic events
and cache events for power10. Inorder to maintain the current
event codes work with DD1 also, create a new array of generic_events,
cache_events and pmu_attr_groups with suffix _dd1, example,
power10_events_attr_dd1. So that further updates to event codes
can be made in the original list, ie, power10_events_attr. Update the
power10 pmu init code to pick the dd1 list while registering
the power PMU, based on the pvr (Processor Version Register) value.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-5-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:40 +0000 (11:54 -0500)]
powerpc/perf: Fix the PMU group constraints for threshold events in power10
The PMU group constraints mask for threshold events covers
all thresholding bits which includes threshold control value
(start/stop), select value as well as thresh_cmp value (MMCRA[9:18].
In power9, thresh_cmp bits were part of the event code. But in case
of power10, thresh_cmp bits are not part of event code due to
inclusion of MMCR3 bits. Hence thresh_cmp is not valid for
group constraints for power10.
Fix the PMU group constraints checking for threshold events in
power10 by using constraint mask and value for only threshold control
and select bits.
Fixes:
a64e697cef23 ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-4-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:39 +0000 (11:54 -0500)]
powerpc/perf: Update the PMU group constraints for l2l3 events in power10
In Power9, L2/L3 bus events are always available as a
"bank" of 4 events. To obtain the counts for any of the
l2/l3 bus events in a given bank, the user will have to
program PMC4 with corresponding l2/l3 bus event for that
bank.
Commit
59029136d750 ("powerpc/perf: Add constraints for power9 l2/l3 bus events")
enforced this rule in Power9. But this is not valid for
Power10, since in Power10 Monitor Mode Control Register2
(MMCR2) has bits to configure l2/l3 event bits. Hence remove
this PMC4 constraint check from power10.
Since the l2/l3 bits in MMCR2 are not per-pmc, patch handles
group constrints checks for l2/l3 bits in MMCR2.
Fixes:
a64e697cef23 ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-3-git-send-email-atrajeev@linux.vnet.ibm.com
Athira Rajeev [Thu, 26 Nov 2020 16:54:38 +0000 (11:54 -0500)]
powerpc/perf: Fix to update radix_scope_qual in power10
power10 uses bit 9 of the raw event code as RADIX_SCOPE_QUAL.
This bit is used for enabling the radix process events.
Patch fixes the PMU counter support functions to program bit
18 of MMCR1 ( Monitor Mode Control Register1 ) with the
RADIX_SCOPE_QUAL bit value. Since this field is not per-pmc,
add this to PMU group constraints to make sure events in a
group will have same bit value for this field. Use bit 21 as
constraint bit field for radix_scope_qual. Patch also updates
the power10 raw event encoding layout information, format field
and constraints bit layout to include the radix_scope_qual bit.
Fixes:
a64e697cef23 ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-2-git-send-email-atrajeev@linux.vnet.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:24 +0000 (10:14 +0530)]
powerpc/book3s64/pkeys: Optimize KUAP and KUEP feature disabled case
If FTR_BOOK3S_KUAP is disabled, kernel will continue to run with the same AMR
value with which it was entered. Hence there is a high chance that
we can return without restoring the AMR value. This also helps the case
when applications are not using the pkey feature. In this case, different
applications will have the same AMR values and hence we can avoid restoring
AMR in this case too.
Also avoid isync() if not really needed.
Do the same for IAMR.
null-syscall benchmark results:
With smap/smep disabled:
Without patch:
957.95 ns 2778.17 cycles
With patch:
858.38 ns 2489.30 cycles
With smap/smep enabled:
Without patch:
1017.26 ns 2950.36 cycles
With patch:
1021.51 ns 2962.44 cycles
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-23-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Wed, 2 Dec 2020 04:38:54 +0000 (10:08 +0530)]
powerpc/book3s64/kup: Check max key supported before enabling kup
Don't enable KUEP/KUAP if we support less than or equal to 3 keys.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202043854.76406-1-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:22 +0000 (10:14 +0530)]
powerpc/book3s64/hash/kuep: Enable KUEP on hash
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-21-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:21 +0000 (10:14 +0530)]
powerpc/book3s64/hash/kuap: Enable kuap on hash
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-20-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:20 +0000 (10:14 +0530)]
powerpc/book3s64/kuep: Use Key 3 to implement KUEP with hash translation.
Radix use IAMR Key 0 and hash translation use IAMR key 3.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-19-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:19 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Use Key 3 to implement KUAP with hash translation.
Radix use AMR Key 0 and hash translation use AMR key 3.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-18-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:18 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Improve error reporting with KUAP
With hash translation use DSISR_KEYFAULT to identify a wrong access.
With Radix we look at the AMR value and type of fault.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-17-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:17 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Restrict access to userspace based on userspace AMR
If an application has configured address protection such that read/write is
denied using pkey even the kernel should receive a FAULT on accessing the same.
This patch use user AMR value stored in pt_regs.amr to achieve the same.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-16-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:16 +0000 (10:14 +0530)]
powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode.
Now that kernel correctly store/restore userspace AMR/IAMR values, avoid
manipulating AMR and IAMR from the kernel on behalf of userspace.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-15-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:15 +0000 (10:14 +0530)]
powerpc/ptrace-view: Use pt_regs values instead of thread_struct based one.
We will remove thread.amr/iamr/uamor in a later patch
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-14-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:14 +0000 (10:14 +0530)]
powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec
On fork, we inherit from the parent and on exec, we should switch to default_amr values.
Also, avoid changing the AMR register value within the kernel. The kernel now runs with
different AMR values.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-13-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:13 +0000 (10:14 +0530)]
powerpc/book3s64/pkeys: Inherit correctly on fork.
Child thread.kuap value is inherited from the parent in copy_thread_tls. We still
need to make sure when the child returns from a fork in the kernel we start with the kernel
default AMR value.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-12-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:12 +0000 (10:14 +0530)]
powerpc/book3s64/pkeys: Store/restore userspace AMR/IAMR correctly on entry and exit from kernel
This prepare kernel to operate with a different value than userspace AMR/IAMR.
For this, AMR/IAMR need to be saved and restored on entry and return from the
kernel.
With KUAP we modify kernel AMR when accessing user address from the kernel
via copy_to/from_user interfaces. We don't need to modify IAMR value in
similar fashion.
If MMU_FTR_PKEY is enabled we need to save AMR/IAMR in pt_regs on entering
kernel from userspace. If not we can assume that AMR/IAMR is not modified
from userspace.
We need to save AMR if we have MMU_FTR_BOOK3S_KUAP feature enabled and we are
interrupted within kernel. This is required so that if we get interrupted
within copy_to/from_user we continue with the right AMR value.
If we hae MMU_FTR_BOOK3S_KUEP enabled we need to restore IAMR on
return to userspace beause kernel will be running with a different
IAMR value.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-11-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:11 +0000 (10:14 +0530)]
powerpc/exec: Set thread.regs early during exec
In later patches during exec, we would like to access default regs.amr to
control access to the user mapping. Having thread.regs set early makes the
code changes simpler.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-10-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:10 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation
This patch updates kernel hash page table entries to use storage key 3
for its mapping. This implies all kernel access will now use key 3 to
control READ/WRITE. The patch also prevents the allocation of key 3 from
userspace and UAMOR value is updated such that userspace cannot modify key 3.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-9-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:09 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Rename MMU_FTR_RADIX_KUAP and MMU_FTR_KUEP
This is in preparation to adding support for kuap with hash translation.
In preparation for that rename/move kuap related functions to
non radix names. Also move the feature bit closer to MMU_FTR_KUEP.
MMU_FTR_KUEP is renamed to MMU_FTR_BOOK3S_KUEP to indicate the feature
is only relevant to BOOK3S_64
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-8-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:08 +0000 (10:14 +0530)]
powerpc/book3s64/kuep: Move KUEP related function outside radix
The next set of patches adds support for kuep with hash translation.
In preparation for that rename/move kuap related functions to
non radix names.
Also set MMU_FTR_KUEP and add the missing isync().
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-7-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:07 +0000 (10:14 +0530)]
powerpc/book3s64/kuap: Move KUAP related function outside radix
The next set of patches adds support for kuap with hash translation.
In preparation for that rename/move kuap related functions to
non radix names.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-6-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:06 +0000 (10:14 +0530)]
powerpc/book3s64/kuap/kuep: Move uamor setup to pkey init
This patch consolidates UAMOR update across pkey, kuap and kuep features.
The boot cpu initialize UAMOR via pkey init and both radix/hash do the
secondary cpu UAMOR init in early_init_mmu_secondary.
We don't check for mmu_feature in radix secondary init because UAMOR
is a supported SPRN with all CPUs supporting radix translation.
The old code was not updating UAMOR if we had smap disabled and smep enabled.
This change handles that case.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-5-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:05 +0000 (10:14 +0530)]
powerpc/book3s64/kuap/kuep: Add PPC_PKEY config on book3s64
The config CONFIG_PPC_PKEY is used to select the base support that is
required for PPC_MEM_KEYS, KUAP, and KUEP. Adding this dependency
reduces the code complexity(in terms of #ifdefs) and enables us to
move some of the initialization code to pkeys.c
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-4-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:04 +0000 (10:14 +0530)]
KVM: PPC: BOOK3S: PR: Ignore UAMOR SPR
With power7 and above we expect the cpu to support keys. The
number of keys are firmware controlled based on device tree.
PR KVM do not expose key details via device tree. Hence when running with PR KVM
we do run with MMU_FTR_KEY support disabled. But we can still
get updates on UAMOR. Hence ignore access to them and for mfstpr return
0 indicating no AMR/IAMR update is no allowed.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-3-aneesh.kumar@linux.ibm.com
Aneesh Kumar K.V [Fri, 27 Nov 2020 04:44:03 +0000 (10:14 +0530)]
powerpc: Add new macro to handle NESTED_IFCLR
This will be used by the following patches
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-2-aneesh.kumar@linux.ibm.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:28 +0000 (17:07 +1000)]
powerpc/64s: Tidy machine check SLB logging
Since ISA v3.0, SLB no longer uses the slb_cache, and stab_rr is no
longer correlated with SLB allocation. Move those to pre-3.0.
While here, improve some alignments and reduce whitespace.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-9-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:27 +0000 (17:07 +1000)]
powerpc/64s: Remove "Host" from MCE logging
"Host" caused machine check is printed when the kernel sees a MCE
hit in this kernel or userspace, and "Guest" if it hit one of its
guests. This is confusing when a guest kernel handles a hypervisor-
delivered MCE, it also prints "Host".
Just remove "Host". "Guest" is adequate to make the distinction.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-8-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:26 +0000 (17:07 +1000)]
powerpc/64s/pseries: Add ERAT specific machine check handler
Don't treat ERAT MCEs as SLB, don't save the SLB and use a specific
ERAT flush to recover it.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-7-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:25 +0000 (17:07 +1000)]
powerpc/64s/powernv: Ratelimit harmless HMI error printing
Harmless HMI errors can be triggered by guests in some cases, and don't
contain much useful information anyway. Ratelimit these to avoid
flooding the console/logs.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Use dedicated ratelimit state, not printk_ratelimit()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-6-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:24 +0000 (17:07 +1000)]
KVM: PPC: Book3S HV: Ratelimit machine check messages coming from guests
A number of machine check exceptions are triggerable by the guest.
Ratelimit these to avoid a guest flooding the host console and logs.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Use dedicated ratelimit state, not printk_ratelimit()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-5-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:23 +0000 (17:07 +1000)]
KVM: PPC: Book3S HV: Don't attempt to recover machine checks for FWNMI enabled guests
Guests that can deal with machine checks would actually prefer the
hypervisor not to try recover for them. For example if SLB multi-hits
are recovered by the hypervisor by clearing the SLB then the guest
will not be able to log the contents and debug its programming error.
If guests don't register for FWNMI, they may not be so capable and so
the hypervisor will continue to recover for those.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-4-npiggin@gmail.com
Nicholas Piggin [Sat, 28 Nov 2020 07:07:22 +0000 (17:07 +1000)]
powerpc/64s/powernv: Allow KVM to handle guest machine check details
KVM has strategies to perform machine check recovery. If a MCE hits
in a guest, have the low level handler just decode and save the MCE
but not try to recover anything, so KVM can deal with it.
The host does not own SLBs and does not need to report the SLB state
in case of a multi-hit for example, or know about the virtual memory
map of the guest.
UE and memory poisoning of guest pages in the host is one thing that
is possibly not completely robust at the moment, but this too needs
to go via KVM (possibly via the guest and back out to host via hcall)
rather than being handled at a low level in the host handler.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-3-npiggin@gmail.com
Uwe Kleine-König [Thu, 26 Nov 2020 16:59:50 +0000 (17:59 +0100)]
powerpc/ps3: make system bus's remove and shutdown callbacks return void
The driver core ignores the return value of struct device_driver::remove
because there is only little that can be done. For the shutdown callback
it's ps3_system_bus_shutdown() which ignores the return value.
To simplify the quest to make struct device_driver::remove return void,
let struct ps3_system_bus_driver::remove return void, too. All users
already unconditionally return 0, this commit makes it obvious that
returning an error code is a bad idea and ensures future users behave
accordingly.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126165950.2554997-2-u.kleine-koenig@pengutronix.de
Uwe Kleine-König [Thu, 26 Nov 2020 16:59:49 +0000 (17:59 +0100)]
ALSA: ppc: drop if block with always false condition
The remove callback is only called for devices that were probed
successfully before. As the matching probe function cannot complete
without error if dev->match_id != PS3_MATCH_ID_SOUND, we don't have to
check this here.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126165950.2554997-1-u.kleine-koenig@pengutronix.de
Srikar Dronamraju [Wed, 2 Dec 2020 05:04:56 +0000 (10:34 +0530)]
powerpc/paravirt: Use is_kvm_guest() in vcpu_is_preempted()
If its a shared LPAR but not a KVM guest, then see if the vCPU is
related to the calling vCPU. On PowerVM, only cores can be preempted.
So if one vCPU is a non-preempted state, we can decipher that all
other vCPUs sharing the same core are in non-preempted state.
Performance results:
$ perf stat -r 5 -a perf bench sched pipe -l
10000000 (lesser time is better)
powerpc/next
35,107,951.20 msec cpu-clock # 255.898 CPUs utilized ( +- 0.31% )
23,655,348 context-switches # 0.674 K/sec ( +- 3.72% )
14,465 cpu-migrations # 0.000 K/sec ( +- 5.37% )
82,463 page-faults # 0.002 K/sec ( +- 8.40% )
1,127,182,328,206 cycles # 0.032 GHz ( +- 1.60% ) (66.67%)
78,587,300,622 stalled-cycles-frontend # 6.97% frontend cycles idle ( +- 0.08% ) (50.01%)
654,124,218,432 stalled-cycles-backend # 58.03% backend cycles idle ( +- 1.74% ) (50.01%)
834,013,059,242 instructions # 0.74 insn per cycle
# 0.78 stalled cycles per insn ( +- 0.73% ) (66.67%)
132,911,454,387 branches # 3.786 M/sec ( +- 0.59% ) (50.00%)
2,890,882,143 branch-misses # 2.18% of all branches ( +- 0.46% ) (50.00%)
137.195 +- 0.419 seconds time elapsed ( +- 0.31% )
powerpc/next + patchset
29,981,702.64 msec cpu-clock # 255.881 CPUs utilized ( +- 1.30% )
40,162,456 context-switches # 0.001 M/sec ( +- 0.01% )
1,110 cpu-migrations # 0.000 K/sec ( +- 5.20% )
62,616 page-faults # 0.002 K/sec ( +- 3.93% )
1,430,030,626,037 cycles # 0.048 GHz ( +- 1.41% ) (66.67%)
83,202,707,288 stalled-cycles-frontend # 5.82% frontend cycles idle ( +- 0.75% ) (50.01%)
744,556,088,520 stalled-cycles-backend # 52.07% backend cycles idle ( +- 1.39% ) (50.01%)
940,138,418,674 instructions # 0.66 insn per cycle
# 0.79 stalled cycles per insn ( +- 0.51% ) (66.67%)
146,452,852,283 branches # 4.885 M/sec ( +- 0.80% ) (50.00%)
3,237,743,996 branch-misses # 2.21% of all branches ( +- 1.18% ) (50.01%)
117.17 +- 1.52 seconds time elapsed ( +- 1.30% )
This is around 14.6% improvement in performance.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Waiman Long <longman@redhat.com>
[mpe: Fold in performance results from cover letter]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202050456.164005-5-srikar@linux.vnet.ibm.com
Srikar Dronamraju [Wed, 2 Dec 2020 05:04:55 +0000 (10:34 +0530)]
powerpc: Reintroduce is_kvm_guest() as a fast-path check
Introduce a static branch that would be set during boot if the OS
happens to be a KVM guest. Subsequent checks to see if we are on KVM
will rely on this static branch. This static branch would be used in
vcpu_is_preempted() in a subsequent patch.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202050456.164005-4-srikar@linux.vnet.ibm.com
Srikar Dronamraju [Wed, 2 Dec 2020 05:04:54 +0000 (10:34 +0530)]
powerpc: Rename is_kvm_guest() to check_kvm_guest()
We want to reuse the is_kvm_guest() name in a subsequent patch but
with a new body. Hence rename is_kvm_guest() to check_kvm_guest(). No
additional changes.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: kernel test robot <lkp@intel.com> # int -> bool fix
[mpe: Fold in fix from lkp to use true/false not 0/1]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202050456.164005-3-srikar@linux.vnet.ibm.com
Srikar Dronamraju [Wed, 2 Dec 2020 05:04:53 +0000 (10:34 +0530)]
powerpc: Refactor is_kvm_guest() declaration to new header
Only code/declaration movement, in anticipation of doing a KVM-aware
vcpu_is_preempted(). No additional changes.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201202050456.164005-2-srikar@linux.vnet.ibm.com
Nicholas Piggin [Sat, 7 Nov 2020 02:33:05 +0000 (12:33 +1000)]
powerpc: show registers when unwinding interrupt frames
It's often useful to know the register state for interrupts in
the stack frame. In the below example (with this patch applied),
the important information is the state of the page fault.
A blatant case like this probably rather should have the page
fault regs passed down to the warning, but quite often there are
less obvious cases where an interrupt shows up that might give
some more clues.
The downside is longer and more complex bug output.
Bug: Write fault blocked by AMR!
WARNING: CPU: 0 PID: 72 at arch/powerpc/include/asm/book3s/64/kup-radix.h:164 __do_page_fault+0x880/0xa90
Modules linked in:
CPU: 0 PID: 72 Comm: systemd-gpt-aut Not tainted
NIP:
c00000000006e2f0 LR:
c00000000006e2ec CTR:
0000000000000000
REGS:
c00000000a4f3420 TRAP: 0700
MSR:
8000000000021033 <SF,ME,IR,DR,RI,LE> CR:
28002840 XER:
20040000
CFAR:
c000000000128be0 IRQMASK: 3
GPR00:
c00000000006e2ec c00000000a4f36c0 c0000000014f0700 0000000000000020
GPR04:
0000000000000001 c000000001290f50 0000000000000001 c000000001290f80
GPR08:
c000000001612b08 0000000000000000 0000000000000000 00000000ffffe0f7
GPR12:
0000000048002840 c0000000016e0000 c00c000000021c80 c000000000fd6f60
GPR16:
0000000000000000 c00000000a104698 0000000000000003 c0000000087f0000
GPR20:
0000000000000100 c0000000070330b8 0000000000000000 0000000000000004
GPR24:
0000000002000000 0000000000000300 0000000002000000 c00000000a5b0c00
GPR28:
0000000000000000 000000000a000000 00007fffb2a90038 c00000000a4f3820
NIP [
c00000000006e2f0] __do_page_fault+0x880/0xa90
LR [
c00000000006e2ec] __do_page_fault+0x87c/0xa90
Call Trace:
[
c00000000a4f36c0] [
c00000000006e2ec] __do_page_fault+0x87c/0xa90 (unreliable)
[
c00000000a4f3780] [
c000000000e1c034] do_page_fault+0x34/0x90
[
c00000000a4f37b0] [
c000000000008908] data_access_common_virt+0x158/0x1b0
--- interrupt: 300 at __copy_tofrom_user_base+0x9c/0x5a4
NIP:
c00000000009b028 LR:
c000000000802978 CTR:
0000000000000800
REGS:
c00000000a4f3820 TRAP: 0300
MSR:
800000000280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR:
24004840 XER:
00000000
CFAR:
c00000000009aff4 DAR:
00007fffb2a90038 DSISR:
0a000000 IRQMASK: 0
GPR00:
0000000000000000 c00000000a4f3ac0 c0000000014f0700 00007fffb2a90028
GPR04:
c000000008720010 0000000000010000 0000000000000000 0000000000000000
GPR08:
0000000000000000 0000000000000000 0000000000000000 0000000000000001
GPR12:
0000000000004000 c0000000016e0000 c00c000000021c80 c000000000fd6f60
GPR16:
0000000000000000 c00000000a104698 0000000000000003 c0000000087f0000
GPR20:
0000000000000100 c0000000070330b8 0000000000000000 0000000000000004
GPR24:
c00000000a4f3c80 c000000008720000 0000000000010000 0000000000000000
GPR28:
0000000000010000 0000000008720000 0000000000010000 c000000001515b98
NIP [
c00000000009b028] __copy_tofrom_user_base+0x9c/0x5a4
LR [
c000000000802978] copyout+0x68/0xc0
--- interrupt: 300
[
c00000000a4f3af0] [
c0000000008074b8] copy_page_to_iter+0x188/0x540
[
c00000000a4f3b50] [
c00000000035c678] generic_file_buffered_read+0x358/0xd80
[
c00000000a4f3c40] [
c0000000004c1e90] blkdev_read_iter+0x50/0x80
[
c00000000a4f3c60] [
c00000000045733c] new_sync_read+0x12c/0x1c0
[
c00000000a4f3d00] [
c00000000045a1f0] vfs_read+0x1d0/0x240
[
c00000000a4f3d50] [
c00000000045a7f4] ksys_read+0x84/0x140
[
c00000000a4f3da0] [
c000000000033a60] system_call_exception+0x100/0x280
[
c00000000a4f3e10] [
c00000000000c508] system_call_common+0xf8/0x2f8
Instruction dump:
eae10078 3be0000b 4bfff890 60420000 792917e1 4182ff18 3c82ffab 3884a5e0
3c62ffab 3863a6e8 480ba891 60000000 <
0fe00000>
3be0000b 4bfff860 e93c0938
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201107023305.2384874-1-npiggin@gmail.com
Athira Rajeev [Tue, 1 Dec 2020 09:28:00 +0000 (04:28 -0500)]
powerpc/perf: Invoke per-CPU variable access with disabled interrupts
The power_pmu_event_init() callback access per-cpu variable
(cpu_hw_events) to check for event constraints and Branch Stack
(BHRB). Current usage is to disable preemption when accessing the
per-cpu variable, but this does not prevent timer callback from
interrupting event_init. Fix this by using 'local_irq_save/restore'
to make sure the code path is invoked with disabled interrupts.
This change is tested in mambo simulator to ensure that, if a timer
interrupt comes in during the per-cpu access in event_init, it will be
soft masked and replayed later. For testing purpose, introduced a
udelay() in power_pmu_event_init() to make sure a timer interrupt arrives
while in per-cpu variable access code between local_irq_save/resore.
As expected the timer interrupt was replayed later during local_irq_restore
called from power_pmu_event_init. This was confirmed by adding
breakpoint in mambo and checking the backtrace when timer_interrupt
was hit.
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606814880-1720-1-git-send-email-atrajeev@linux.vnet.ibm.com
Harish [Tue, 1 Dec 2020 09:24:03 +0000 (14:54 +0530)]
selftests/powerpc: Fix uninitialized variable warning
Patch fixes uninitialized variable warning in bad_accesses test
which causes the selftests build to fail in older distibutions
bad_accesses.c: In function ‘bad_access’:
bad_accesses.c:52:9: error: ‘x’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
printf("Bad - no SEGV! (%c)\n", x);
^
cc1: all warnings being treated as errors
Signed-off-by: Harish <harish@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201201092403.238182-1-harish@linux.ibm.com
Daniel Axtens [Tue, 1 Dec 2020 14:44:27 +0000 (01:44 +1100)]
selftests/powerpc: update .gitignore
I did an in-place build of the self-tests and found that it left
the tree dirty.
Add missed test binaries to .gitignore
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201201144427.1228745-1-dja@axtens.net
Daniel Axtens [Tue, 1 Dec 2020 14:43:44 +0000 (01:43 +1100)]
powerpc/feature-fixups: use a semicolon rather than a comma
In a bunch of our security flushes, we use a comma rather than
a semicolon to 'terminate' an assignment. Nothing breaks, but
checkpatch picks it up if you copy it into another flush.
Switch to semicolons for ending statements.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201201144344.1228421-1-dja@axtens.net
Frederic Barrat [Mon, 30 Nov 2020 15:29:49 +0000 (16:29 +0100)]
powerpc/pseries: Define PCI bus speed for Gen4 and Gen5
Update bus speed definition for PCI Gen4 and 5.
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201130152949.26467-1-fbarrat@linux.ibm.com
Jordan Niethe [Tue, 1 Dec 2020 00:52:03 +0000 (11:52 +1100)]
powerpc: Allow relative pointers in bug table entries
This enables GENERIC_BUG_RELATIVE_POINTERS on Power so that 32-bit
offsets are stored in the bug entries rather than 64-bit pointers.
While this doesn't save space for 32-bit machines, use it anyway so
there is only one code path.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201201005203.15210-1-jniethe5@gmail.com
Ravi Bangoria [Mon, 30 Nov 2020 03:44:06 +0000 (09:14 +0530)]
powerpc/xmon: Fix build failure for 8xx
With CONFIG_PPC_8xx and CONFIG_XMON set, kernel build fails with
arch/powerpc/xmon/xmon.c:1379:12: error: 'find_free_data_bpt' defined
but not used [-Werror=unused-function]
Fix it by enclosing find_free_data_bpt() inside #ifndef CONFIG_PPC_8xx.
Fixes:
30df74d67d48 ("powerpc/watchpoint/xmon: Support 2nd DAWR")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201130034406.288047-1-ravi.bangoria@linux.ibm.com
Youling Tang [Fri, 27 Nov 2020 07:07:37 +0000 (15:07 +0800)]
powerpc: Use common STABS_DEBUG and DWARF_DEBUG and ELF_DETAILS macro
Use the common STABS_DEBUG and DWARF_DEBUG and ELF_DETAILS macro rule for
the linker script in an effort.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606460857-2723-1-git-send-email-tangyouling@loongson.cn
Jordan Niethe [Mon, 30 Nov 2020 00:44:04 +0000 (11:44 +1100)]
powerpc/64: Fix an EMIT_BUG_ENTRY in head_64.S
Commit
63ce271b5e37 ("powerpc/prom: convert PROM_BUG() to standard
trap") added an EMIT_BUG_ENTRY for the trap after the branch to
start_kernel(). The EMIT_BUG_ENTRY was for the address "0b", however the
trap was not labeled with "0". Hence the address used for bug is in
relative_toc() where the previous "0" label is. Label the trap as "0" so
the correct address is used.
Fixes:
63ce271b5e37 ("powerpc/prom: convert PROM_BUG() to standard trap")
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201130004404.30953-1-jniethe5@gmail.com
Christophe Leroy [Sun, 27 Sep 2020 09:16:48 +0000 (09:16 +0000)]
powerpc/vdso: Cleanup vdso.h
Rename the guard define to _ASM_POWERPC_VDSO_H
And remove useless #ifdef __KERNEL__
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/9902590d410cd1c2afa48b83b277faf0711f07b2.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:47 +0000 (09:16 +0000)]
powerpc/vdso: Remove VDSO32_LBASE and VDSO64_LBASE
VDSO32_LBASE and VDSO64_LBASE are 0. Remove them to simplify code.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6c4d6570d886bbe1cc471e8ca01602e4b4d9beb5.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:46 +0000 (09:16 +0000)]
powerpc/vdso: Remove DBG()
DBG() is not used anymore. Remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e11a9b50e709f197bb3aa2ed1d80d2dee8714afc.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:45 +0000 (09:16 +0000)]
powerpc/vdso: Remove vdso_ready
There is no way to get out of vdso_init() prematuraly anymore.
Remove vdso_ready as it will always be 1.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0e1e18c6329b848aa3edeeba76509b4d76182e7d.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:43 +0000 (09:16 +0000)]
powerpc/vdso: Remove vdso_setup()
vdso_fixup_features() cannot fail anymore and that's
the only function called by vdso_setup().
vdso_setup() has become trivial and can be removed.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/11522eec6140f510a8c89c63cbb739277d097fdc.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:42 +0000 (09:16 +0000)]
powerpc/vdso: Remove lib32_elfinfo and lib64_elfinfo
lib32_elfinfo and lib64_elfinfo are not used anymore, remove them.
Also remove vdso32_kbase and vdso64_kbase while removing the
last use.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/01ac65abf22f0428f8f764525a7d84459c54d806.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:41 +0000 (09:16 +0000)]
powerpc/vdso: Remove symbol section information in struct lib32/64_elfinfo
The members related to the symbol section in struct lib32_elfinfo and
struct lib64_elfinfo are not used anymore, removed them.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b779e5b7cc0354e2f87fd407fe5b02f4a8a73825.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:40 +0000 (09:16 +0000)]
powerpc/vdso: Remove unused text member in struct lib32/64_elfinfo
The text member in struct lib32_elfinfo and struct lib64_elfinfo
is not used, remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f53dcc9bb1946a7854d15b34d03d3d2e2003848c.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:39 +0000 (09:16 +0000)]
powerpc/vdso: Remove vdso_patches[] and associated functions
vdso_patches[] is now empty, remove it and remove
all functions that depends on it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/27d75debd6e4ddeaffe1d66ffed1e7526684a004.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:38 +0000 (09:16 +0000)]
powerpc/vdso: Remove runtime generated sigtramp offsets
Signal trampoline offsets are now generated at buildtime.
Runtime generated offsets are not used anymore, remove them.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7c192d35a437151837cf4c48aeccb42380d6daac.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:37 +0000 (09:16 +0000)]
powerpc/vdso: Remove __kernel_datapage_offset
__kernel_datapage_offset is not used anymore, remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ddb5c746bec4e1a026d7c85243213a1876ef844f.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:36 +0000 (09:16 +0000)]
powerpc/vdso: Remove vdso32_pages and vdso64_pages
vdso32_pages and vdso64_pages are not used anymore.
Remove them.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/bce021f616cbaf39dfb5766cf7ef114adcb918d9.1601197618.git.christophe.leroy@csgroup.eu
Christophe Leroy [Sun, 27 Sep 2020 09:16:35 +0000 (09:16 +0000)]
powerpc/vdso: Merge __kernel_sync_dicache_p5() into __kernel_sync_dicache()
__kernel_sync_dicache_p5() is an alternative to
__kernel_sync_dicache() when cpu has CPU_FTR_COHERENT_ICACHE
Remove this alternative function and merge
__kernel_sync_dicache_p5() into __kernel_sync_dicache() using
standard CPU feature fixup.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4c7dcc6544882761b2b0249d7a8ec2c3a8088cb5.1601197618.git.christophe.leroy@csgroup.eu