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The CPACF instructions can complete with three different condition codes:
CC=0 for successful completion, CC=1 if the protected key verification
failed, and CC=3 for partial completion.
The inline functions will restart the CPACF instruction for partial
completion, this removes the CC=3 case. The CC=1 case is only relevant
for the protected key functions of the KM, KMC, KMAC and KMCTR
instructions. As the protected key functions are not used by the
current code, there is no need for any kind of return code handling.
Reviewed-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Use a separate define for the decryption modifier bit instead of
duplicating the function codes for encryption / decrypton.
In addition use an unsigned type for the function code.
Reviewed-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Using vector registers is slightly faster:
raid6: vx128x8 gen() 19705 MB/s
raid6: vx128x8 xor() 11886 MB/s
raid6: using algorithm vx128x8 gen() 19705 MB/s
raid6: .... xor() 11886 MB/s, rmw enabled
vs the software algorithms:
raid6: int64x1 gen() 3018 MB/s
raid6: int64x1 xor() 1429 MB/s
raid6: int64x2 gen() 4661 MB/s
raid6: int64x2 xor() 3143 MB/s
raid6: int64x4 gen() 5392 MB/s
raid6: int64x4 xor() 3509 MB/s
raid6: int64x8 gen() 4441 MB/s
raid6: int64x8 xor() 3207 MB/s
raid6: using algorithm int64x4 gen() 5392 MB/s
raid6: .... xor() 3509 MB/s, rmw enabled
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The machine check handler will do one of two things if the floating-point
control, a floating point register or a vector register can not be
revalidated:
1) if the PSW indicates user mode the process is terminated
2) if the PSW indicates kernel mode the system is stopped
To unconditionally stop the system for 2) is incorrect.
There are three possible outcomes if the floating-point control, a
floating point register or a vector registers can not be revalidated:
1) The kernel is inside a kernel_fpu_begin/kernel_fpu_end block and
needs the register. The system is stopped.
2) No active kernel_fpu_begin/kernel_fpu_end block and the CIF_CPU bit
is not set. The user space process needs the register and is killed.
3) No active kernel_fpu_begin/kernel_fpu_end block and the CIF_FPU bit
is set. Neither the kernel nor the user space process needs the
lost register. Just revalidate it and continue.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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In case of nested user of the FPU or vector registers in the kernel
the current code uses the mask of the FPU/vector registers of the
previous contexts to decide which registers to save and restore.
E.g. if the previous context used KERNEL_VXR_V0V7 and the next
context wants to use KERNEL_VXR_V24V31 the first 8 vector registers
are stored to the FPU state structure. But this is not necessary
as the next context does not use these registers.
Rework the FPU/vector register save and restore code. The new code
does a few things differently:
1) A lowcore field is used instead of a per-cpu variable.
2) The kernel_fpu_end function now has two parameters just like
kernel_fpu_begin. The register flags are required by both
functions to save / restore the minimal register set.
3) The inline functions kernel_fpu_begin/kernel_fpu_end now do the
update of the register masks. If the user space FPU registers
have already been stored neither save_fpu_regs nor the
__kernel_fpu_begin/__kernel_fpu_end functions have to be called
for the first context. In this case kernel_fpu_begin adds 7
instructions and kernel_fpu_end adds 4 instructions.
3) The inline assemblies in __kernel_fpu_begin / __kernel_fpu_end
to save / restore the vector registers are simplified a bit.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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To make the vx-insn.h more versatile avoid cpp preprocessor macros
and allow to use plain numbers for vector and general purpose register
operands. With that you can emit an .include from a C file into the
assembler text and then use the vx-insn macros in inline assemblies.
For example:
asm (".include \"asm/vx-insn.h\"");
static inline void xor_vec(int x, int y, int z)
{
asm volatile("VX %0,%1,%2"
: : "i" (x), "i" (y), "i" (z));
}
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The increment might not be atomic and we're not holding the
timekeeper_lock. Therefore we might lose an update to count, resulting in
VDSO being trapped in a loop. As other archs also simply update the
values and count doesn't seem to have an impact on reloading of these
values in VDSO code, let's just remove the update of tb_update_count.
Suggested-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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By leaving fixup_cc unset, only the clock comparator of the cpu actually
doing the sync is fixed up until now.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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There are still some etr leftovers and wrong comments, let's clean that up.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The way we call do_adjtimex() today is broken. It has 0 effect, as
ADJ_OFFSET_SINGLESHOT (0x0001) in the kernel maps to !ADJ_ADJTIME
(in contrast to user space where it maps to ADJ_OFFSET_SINGLESHOT |
ADJ_ADJTIME - 0x8001). !ADJ_ADJTIME will silently ignore all adjustments
without STA_PLL being active. We could switch to ADJ_ADJTIME or turn
STA_PLL on, but still we would run into some problems:
- Even when switching to nanoseconds, we lose accuracy.
- Successive calls to do_adjtimex() will simply overwrite any leftovers
from the previous call (if not fully handled)
- Anything that NTP does using the sysctl heavily interferes with our
use.
- !ADJ_ADJTIME will silently round stuff > or < than 0.5 seconds
Reusing do_adjtimex() here just feels wrong. The whole STP synchronization
works right now *somehow* only, as do_adjtimex() does nothing and our
TOD clock jumps in time, although it shouldn't. This is especially bad
as the clock could jump backwards in time. We will have to find another
way to fix this up.
As leap seconds are also not properly handled yet, let's just get rid of
all this complex logic altogether and use the correct clock_delta for
fixing up the clock comparator and keeping the sched_clock monotonic.
This change should have 0 effect on the current STP mechanism. Once we
know how to best handle sync events and leap second updates, we'll start
with a fresh implementation.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
Pull facility mask patch from the KVM tree.
* tag 's390forkvm' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
KVM: s390: generate facility mask from readable list
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Automatically generate the KVM facility mask out of a readable list.
Manually changing the masks is very error prone, especially if the
special IBM bit numbering has to be considered.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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The 'report_error' interface for PCI devices found on s390 can be
used by a user space program to inject an adapter error notification.
Add a new kernel interface zpci_report_error to allow a PCI device
driver to inject these error notifications without a detour over
user space.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Merge the __p[m|u]xdp_idte and __p[m|u]dp_idte_local functions into a
single __p[m|u]dp_idte function with an additional parameter.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Merge the __ptep_ipte and __ptep_ipte_local functions into a single
__ptep_ipte function with an additional parameter. The __pte_ipte_range
function is still extra as the while loops makes it hard to merge.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The __tlb_flush_mm() helper uses a global flush if the mm struct
has a gmap structure attached to it. Replace the global flush with
two individual flushes by means of the IDTE instruction if only a
single gmap is attached the the mm.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The local-clearing control of the IDTE instruction does not have any effect
for the clearing-by-ASCE operation. Only the invalidation-and-clearing
operation respects the local-clearing bit.
Remove __tlb_flush_idte_local and simplify the batched TLB flushing code.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a number of memory corruption bugs in the newly added
sha256-mb/sha256-mb code"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: sha512-mb - fix ctx pointer
crypto: sha256-mb - fix ctx pointer and digest copy
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git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
- support for Syscall ABI v4 with upstream gcc 6.x
- lockdep fix (Daniel Mentz)
- gdb register clobber (Liav Rehana)
- couple of missing exports for modules
- other fixes here and there
* tag 'arc-4.8-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: export __udivdi3 for modules
ARC: mm: fix build breakage with STRICT_MM_TYPECHECKS
ARC: export kmap
ARC: Support syscall ABI v4
ARC: use correct offset in pt_regs for saving/restoring user mode r25
ARC: Elide redundant setup of DMA callbacks
ARC: Call trace_hardirqs_on() before enabling irqs
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When building gccgo in userspace, errno.h gets parsed and the go include file
sysinfo.go is generated.
Since EREFUSED is defined to the same value as ECONNREFUSED, and ECONNREFUSED
is defined later on in errno.h, this leads to go complaining that EREFUSED
isn't defined yet.
Fix this trivial problem by moving the define of EREFUSED down after
ECONNREFUSED in errno.h (and clean up the indenting while touching this line).
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
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Commit 54b66800907 (parisc: Add native high-resolution sched_clock()
implementation) added support to use the CPU-internal cr16 counters as reliable
clocksource with the help of HAVE_UNSTABLE_SCHED_CLOCK.
Sadly the commit missed to remove the hack which prevented cr16 to become the
default clocksource even on SMP systems.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.7+
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Some module using div_u64() was failing to link because the libgcc 64-bit
divide assist routine was not being exported for modules
Reported-by: avinashp@quantenna.com
Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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| CC mm/memory.o
| In file included from ../mm/memory.c:53:0:
| ../include/linux/pfn_t.h: In function ‘pfn_t_pte’:
| ../include/linux/pfn_t.h:78:2: error: conversion to non-scalar type requested
| return pfn_pte(pfn_t_to_pfn(pfn), pgprot);
With STRICT_MM_TYPECHECKS pte_t is a struct and the offending code
forces a cast which ends up shifting a struct and hence the gcc warning.
Note that in recent past some of the arches (aarch64, s390) made
STRICT_MM_TYPECHECKS default, but we don't for ARC as this leads to slightly
worse generated code, given ARC ABI definition of returning structs
(which pte_t would become)
Quoting from ARC ABI...
"Results of type struct are returned in a caller-supplied temporary
variable whose address is passed in r0.
For such functions, the arguments are shifted so that they are
passed in r1 and up."
So
- struct to be returned would be allocated on stack requiring extra
code at call sites
- callee updates stack memory to facilitate the return (vs. simple
MOV into return reg r0)
Hence STRICT_MM_TYPECHECKS is not enabled by default for ARC
Cc: <stable@vger.kernel.org> #4.4+
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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| MODPOST 7 modules
| ERROR: "kmap" [fs/ext2/ext2.ko] undefined!
| ../scripts/Makefile.modpost:91: recipe for target '__modpost' failed
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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The syscall ABI includes the gcc functional calling ABI since a syscall
implies userland caller and kernel callee.
The current gcc ABI (v3) for ARCv2 ISA required 64-bit data be passed in
even-odd register pairs, (potentially punching reg holes when passing such
values as args). This was partly driven by the fact that the double-word
LDD/STD instructions in ARCv2 expect the register alignment and thus gcc
forcing this avoids extra MOV at the cost of a few unused register (which we
have plenty anyways).
This however was rejected as part of upstreaming gcc port to HS. So the new
ABI v4 doesn't enforce the even-odd reg restriction.
Do note that for ARCompact ISA builds v3 and v4 are practically the same in
terms of gcc code generation.
In terms of change management, we infer the new ABI if gcc 6.x onwards
is used for building the kernel.
This also needs a stable backport to enable older kernels to work with
new tools/user-space
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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User mode callee regs are explicitly collected before signal delivery or
breakpoint trap. r25 is special for kernel as it serves as task pointer,
so user mode value is clobbered very early. It is saved in pt_regs where
generally only scratch (aka caller saved) regs are saved.
The code to access the corresponding pt_regs location had a subtle bug as
it was using load/store with scaling of offset, whereas the offset was already
byte wise correct. So fix this by replacing LD.AS with a standard LD
Cc: <stable@vger.kernel.org>
Signed-off-by: Liav Rehana <liavr@mellanox.com>
Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com>
[vgupta: rewrote title and commit log]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree fixes from Rob Herring:
- a couple of DT node ref counting fixes
- fix __unflatten_device_tree for PPC PCI hotplug case
- rework marking irq controllers as OF_POPULATED in cases where real
driver is used.
- disable of_platform_default_populate_init on PPC. The change in
initcall order causes problems which need to be sorted out later.
* tag 'devicetree-fixes-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: fix reference counting in of_graph_get_endpoint_by_regs
of/platform: disable the of_platform_default_populate_init() for all the ppc boards
ARM: imx6: mark GPC node as not populated after irq init to probe pm domain driver
of/irq: Mark interrupt controllers as populated before initialisation
drivers/of: Validate device node in __unflatten_device_tree()
of: Delete an unnecessary check before the function call "of_node_put"
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"An initrd microcode loading fix, and an SMP bootup topology setup fix
to resolve crashes on SGI/UV systems if the BIOS is configured in a
certain way"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/smp: Fix __max_logical_packages value setup
x86/microcode/AMD: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Avoid a literal load with the MMU off on the CPU resume path
(potential inconsistency between cache and RAM)
- Build error with CONFIG_ACPI=n fixed
- Compiler warning in the arch/arm64/mm/dump.c code fixed
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Fix shift warning in arch/arm64/mm/dump.c
arm64: kernel: avoid literal load of virtual address with MMU off
arm64: Fix NUMA build error when !CONFIG_ACPI
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Pull ARM fixes from Russell King:
"Only three fixes this time:
- Emil found an overflow problem with the memory layout sanity check.
- Ard Biesheuvel noticed that late-allocated page tables (for EFI)
weren't being properly constructed.
- Guenter Roeck reported a problem found on qemu caused by the recent
addr_limit changes"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: fix address limit restoration for undefined instructions
ARM: 8591/1: mm: use fully constructed struct pages for EFI pgd allocations
ARM: 8590/1: sanity_check_meminfo(): avoid overflow on vmalloc_limit
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"More hibernation-related material: one fix for a recent regression in
the core, one small cleanup of the x86-64 resume code and a
documentation update.
Specifics:
- Fix a hibernate core regression resulting from uncovering a latent
bug in its implementation of memory bitmaps by a recent commit
(James Morse).
- Use __pa() to compute a physical address in the x86-64 code
finalizing resume from hibernation (Rafael Wysocki).
- Update power management documentation related to system sleep
states to remove outdated information from it and to add a
description of a recently introduced hibernation debug feature to
it (Rafael Wysocki)"
* tag 'pm-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / hibernate: Fix rtree_next_node() to avoid walking off list ends
x86/power/64: Use __pa() for physical address computation
PM / sleep: Update some system sleep documentation
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When building with 48-bit VAs and 16K page configuration, it's possible
to get the following warning when building the arm64 page table dumping
code:
arch/arm64/mm/dump.c: In function ‘walk_pud’:
arch/arm64/mm/dump.c:274:102: warning: right shift count >= width of type [-Wshift-count-overflow]
This is because pud_offset(pgd, 0) performs a shift to the right by 36
while the value 0 has the type 'int' by default, therefore 32-bit.
This patch modifies all the p*_offset() uses in arch/arm64/mm/dump.c to
use 0UL for the address argument.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Frank reported kernel panic when he disabled several cores in BIOS
via following option:
Core Disable Bitmap(Hex) [0]
with number 0xFFE, which leaves 16 CPUs in system (out of 48).
The kernel panic below goes along with following messages:
smpboot: Max logical packages: 2^M
smpboot: APIC(0) Converting physical 0 to logical package 0^M
smpboot: APIC(20) Converting physical 1 to logical package 1^M
smpboot: APIC(40) Package 2 exceeds logical package map^M
smpboot: CPU 8 APICId 40 disabled^M
smpboot: APIC(60) Package 3 exceeds logical package map^M
smpboot: CPU 12 APICId 60 disabled^M
...
general protection fault: 0000 [#1] SMP^M
Modules linked in:^M
CPU: 15 PID: 1 Comm: swapper/0 Not tainted 4.7.0-rc5+ #1^M
Hardware name: SGI UV300/UV300, BIOS SGI UV 300 series BIOS 05/25/2016^M
task: ffff8801673e0000 ti: ffff8801673ac000 task.ti: ffff8801673ac000^M
RIP: 0010:[<ffffffff81014d54>] [<ffffffff81014d54>] uncore_change_context+0xd4/0x180^M
...
[<ffffffff810158ac>] uncore_event_init_cpu+0x6c/0x70^M
[<ffffffff81d8c91c>] intel_uncore_init+0x1c2/0x2dd^M
[<ffffffff81d8c75a>] ? uncore_cpu_setup+0x17/0x17^M
[<ffffffff81002190>] do_one_initcall+0x50/0x190^M
[<ffffffff810ab193>] ? parse_args+0x293/0x480^M
[<ffffffff81d87365>] kernel_init_freeable+0x1a5/0x249^M
[<ffffffff81d86a35>] ? set_debug_rodata+0x12/0x12^M
[<ffffffff816dc19e>] kernel_init+0xe/0x110^M
[<ffffffff816e93bf>] ret_from_fork+0x1f/0x40^M
[<ffffffff816dc190>] ? rest_init+0x80/0x80^M
The reason for the panic is wrong value of __max_logical_packages,
which lets logical_package_map uninitialized and the uncore code
relying on this map being properly initialized (maybe we should
add some safety checks there as well).
The __max_logical_packages is computed as:
DIV_ROUND_UP(total_cpus, ncpus);
- ncpus being number of cores
With above BIOS setup we get total_cpus == 16 which set
__max_logical_packages to 2 (ncpus is 12).
Once topology_update_package_map processes CPU with logical
pkg over 2 we display above messages and fail to initialize
the physical_to_logical_pkg map, which makes the uncore code
crash.
The fix is to remove logical_package_map bitmap completely
and keep and update the logical_packages number instead.
After we enumerate all the present CPUs, we check if the
enumerated logical packages count is within its computed
maximum from BIOS data.
If it's not the case, we set this maximum to the new enumerated
value and freeze any new addition of logical packages.
The freeze is because lot of init code like uncore/rapl/cqm
depends on having maximum logical package value set to allocate
their data, so we can't change it later on.
Prarit Bhargava tested the patch and confirms that it solves
the problem:
From dmidecode:
Core Count: 24
Core Enabled: 24
Thread Count: 48
Orig kernel boot log:
[ 0.464981] smpboot: Max logical packages: 19
[ 0.469861] smpboot: APIC(0) Converting physical 0 to logical package 0
[ 0.477261] smpboot: APIC(40) Converting physical 1 to logical package 1
[ 0.484760] smpboot: APIC(80) Converting physical 2 to logical package 2
[ 0.492258] smpboot: APIC(c0) Converting physical 3 to logical package 3
1. nr_cpus=8, should stop enumerating in package 0:
[ 0.533664] smpboot: APIC(0) Converting physical 0 to logical package 0
[ 0.539596] smpboot: Max logical packages: 19
2. max_cpus=8, should still enumerate all packages:
[ 0.526494] smpboot: APIC(0) Converting physical 0 to logical package 0
[ 0.532428] smpboot: APIC(40) Converting physical 1 to logical package 1
[ 0.538456] smpboot: APIC(80) Converting physical 2 to logical package 2
[ 0.544486] smpboot: APIC(c0) Converting physical 3 to logical package 3
[ 0.550524] smpboot: Max logical packages: 19
3. nr_cpus=49 ( 2 socket + 1 core on 3rd socket), should stop enumerating in
package 2:
[ 0.521378] smpboot: APIC(0) Converting physical 0 to logical package 0
[ 0.527314] smpboot: APIC(40) Converting physical 1 to logical package 1
[ 0.533345] smpboot: APIC(80) Converting physical 2 to logical package 2
[ 0.539368] smpboot: Max logical packages: 19
4. maxcpus=49, should still enumerate all packages:
[ 0.525591] smpboot: APIC(0) Converting physical 0 to logical package 0
[ 0.531525] smpboot: APIC(40) Converting physical 1 to logical package 1
[ 0.537547] smpboot: APIC(80) Converting physical 2 to logical package 2
[ 0.543579] smpboot: APIC(c0) Converting physical 3 to logical package 3
[ 0.549624] smpboot: Max logical packages: 19
5. kdump (nr_cpus=1) works as well.
Reported-by: Frank Ramsay <framsay@redhat.com>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160815101700.GA30090@krava
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Similar to:
efaad554b4ff ("x86/microcode/intel: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y")
... fix microcode loading from the initrd on AMD by adding the
randomization offset to the microcode patch container within the initrd.
Reported-and-tested-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-tip-commits@vger.kernel.org
Link: http://lkml.kernel.org/r/20160817113314.GA19221@nazgul.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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* pm-sleep:
PM / hibernate: Fix rtree_next_node() to avoid walking off list ends
x86/power/64: Use __pa() for physical address computation
PM / sleep: Update some system sleep documentation
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Literal loads of virtual addresses are subject to runtime relocation when
CONFIG_RELOCATABLE=y, and given that the relocation routines run with the
MMU and caches enabled, literal loads of relocated values performed with
the MMU off are not guaranteed to return the latest value unless the
memory covering the literal is cleaned to the PoC explicitly.
So defer the literal load until after the MMU has been enabled, just like
we do for primary_switch() and secondary_switch() in head.S.
Fixes: 1e48ef7fcc37 ("arm64: add support for building vmlinux as a relocatable PIE binary")
Cc: <stable@vger.kernel.org> # 4.6+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Since asm/acpi.h is only included by linux/acpi.h when CONFIG_ACPI is
enabled, disabling the latter leads to the following build error on
arm64:
arch/arm64/mm/numa.c: In function ‘arm64_numa_init’:
arch/arm64/mm/numa.c:395:24: error: ‘arm64_acpi_numa_init’ undeclared (first use in this function)
if (!acpi_disabled && !numa_init(arm64_acpi_numa_init))
This patch include the asm/acpi.h explicitly in arch/arm64/mm/numa.c for
the arm64_acpi_numa_init() definition.
Fixes: d8b47fca8c23 ("arm64, ACPI, NUMA: NUMA support based on SRAT and SLIT")
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"A couple of bug fixes, minor cleanup and a change to the default
config"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/dasd: fix failing CUIR assignment under LPAR
s390/pageattr: handle numpages parameter correctly
s390/dasd: fix hanging device after clear subchannel
s390/qdio: avoid reschedule of outbound tasklet once killed
s390/qdio: remove checks for ccw device internal state
s390/qdio: fix double return code evaluation
s390/qdio: get rid of spin_lock_irqsave usage
s390/cio: remove subchannel_id from ccw_device_private
s390/qdio: obtain subchannel_id via ccw_device_get_schid()
s390/cio: stop using subchannel_id from ccw_device_private
s390/config: make the vector optimized crc function builtin
s390/lib: fix memcmp and strstr
s390/crc32-vx: Fix checksum calculation for small sizes
s390: clarify compressed image code path
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1. fix ctx pointer
Use req_ctx which is the ctx for the next job that have
been completed in the lanes instead of the first
completed job rctx, whose completion could have been
called and released.
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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1. fix ctx pointer
Use req_ctx which is the ctx for the next job that have
been completed in the lanes instead of the first
completed job rctx, whose completion could have been
called and released.
2. fix digest copy
Use XMM register to copy another 16 bytes sha256 digest
instead of a regular register.
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The value of temp_level4_pgt is the physical address of the
top-level page directory, so use __pa() to compute it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu fix from Greg Ungerer:
"This contains only a single fix for a register corruption problem on
certain types of m68k flat format binaries"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68knommu: fix user a5 register being overwritten
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull h8300 and unicore32 architecture fixes from Guenter Roeck:
"Two patches to fix h8300 and unicore32 builds.
unicore32 builds have been broken since v4.6. The fix has been
available in -next since March of this year.
h8300 builds have been broken since the last commit window. The fix
has been available in -next since June of this year"
* tag 'fixes-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
h8300: Add missing include file to asm/io.h
unicore32: mm: Add missing parameter to arch_vma_access_permitted
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- support for nr_cpus= command line argument (maxcpus was previously
changed to allow secondary CPUs to be hot-plugged)
- ARM PMU interrupt handling fix
- fix potential TLB conflict in the hibernate code
- improved handling of EL1 instruction aborts (better error reporting)
- removal of useless jprobes code for stack saving/restoring
- defconfig updates
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: defconfig: enable CONFIG_LOCALVERSION_AUTO
arm64: defconfig: add options for virtualization and containers
arm64: hibernate: handle allocation failures
arm64: hibernate: avoid potential TLB conflict
arm64: Handle el1 synchronous instruction aborts cleanly
arm64: Remove stack duplicating code from jprobes
drivers/perf: arm-pmu: Fix handling of SPI lacking "interrupt-affinity" property
drivers/perf: arm-pmu: convert arm_pmu_mutex to spinlock
arm64: Support hard limit of cpu count by nr_cpus
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Pull KVM fixes from Radim Krčmář:
"KVM:
- lock kvm_device list to prevent corruption on device creation.
PPC:
- split debugfs initialization from creation of the xics device to
unlock the newly taken kvm lock earlier.
s390:
- prevent userspace from triggering two WARN_ON_ONCE.
MIPS:
- fix several issues in the management of TLB faults (Cc: stable)"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
MIPS: KVM: Propagate kseg0/mapped tlb fault errors
MIPS: KVM: Fix gfn range check in kseg0 tlb faults
MIPS: KVM: Add missing gfn range check
MIPS: KVM: Fix mapped fault broken commpage handling
KVM: Protect device ops->create and list_add with kvm->lock
KVM: PPC: Move xics_debugfs_init out of create
KVM: s390: reset KVM_REQ_MMU_RELOAD if mapping the prefix failed
KVM: s390: set the prefix initially properly
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h8300 builds fail with
arch/h8300/include/asm/io.h:9:15: error: unknown type name ‘u8’
arch/h8300/include/asm/io.h:15:15: error: unknown type name ‘u16’
arch/h8300/include/asm/io.h:21:15: error: unknown type name ‘u32’
and many related errors.
Fixes: 23c82d41bdf4 ("kexec-allow-architectures-to-override-boot-mapping-fix")
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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unicore32 fails to compile with the following errors.
mm/memory.c: In function ‘__handle_mm_fault’:
mm/memory.c:3381: error:
too many arguments to function ‘arch_vma_access_permitted’
mm/gup.c: In function ‘check_vma_flags’:
mm/gup.c:456: error:
too many arguments to function ‘arch_vma_access_permitted’
mm/gup.c: In function ‘vma_permits_fault’:
mm/gup.c:640: error:
too many arguments to function ‘arch_vma_access_permitted’
Fixes: d61172b4b695b ("mm/core, x86/mm/pkeys: Differentiate instruction fetches")
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Two hibernation fixes allowing it to work with the recently added
randomization of the kernel identity mapping base on x86-64 and one
cpufreq driver regression fix.
Specifics:
- Fix the x86 identity mapping creation helpers to avoid the
assumption that the base address of the mapping will always be
aligned at the PGD level, as it may be aligned at the PUD level if
address space randomization is enabled (Rafael Wysocki).
- Fix the hibernation core to avoid executing tracing functions
before restoring the processor state completely during resume
(Thomas Garnier).
- Fix a recently introduced regression in the powernv cpufreq driver
that causes it to crash due to an out-of-bounds array access
(Akshay Adiga)"
* tag 'pm-4.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / hibernate: Restore processor state before using per-CPU variables
x86/power/64: Always create temporary identity mapping correctly
cpufreq: powernv: Fix crash in gpstate_timer_handler()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"This is bigger than usual - the reason is partly a pent-up stream of
fixes after the merge window and partly accidental. The fixes are:
- five patches to fix a boot failure on Andy Lutomirsky's laptop
- four SGI UV platform fixes
- KASAN fix
- warning fix
- documentation update
- swap entry definition fix
- pkeys fix
- irq stats fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic/x2apic, smp/hotplug: Don't use before alloc in x2apic_cluster_probe()
x86/efi: Allocate a trampoline if needed in efi_free_boot_services()
x86/boot: Rework reserve_real_mode() to allow multiple tries
x86/boot: Defer setup_real_mode() to early_initcall time
x86/boot: Synchronize trampoline_cr4_features and mmu_cr4_features directly
x86/boot: Run reserve_bios_regions() after we initialize the memory map
x86/irq: Do not substract irq_tlb_count from irq_call_count
x86/mm: Fix swap entry comment and macro
x86/mm/kaslr: Fix -Wformat-security warning
x86/mm/pkeys: Fix compact mode by removing protection keys' XSAVE buffer manipulation
x86/build: Reduce the W=1 warnings noise when compiling x86 syscall tables
x86/platform/UV: Fix kernel panic running RHEL kdump kernel on UV systems
x86/platform/UV: Fix problem with UV4 BIOS providing incorrect PXM values
x86/platform/UV: Fix bug with iounmap() of the UV4 EFI System Table causing a crash
x86/platform/UV: Fix problem with UV4 Socket IDs not being contiguous
x86/entry: Clarify the RF saving/restoring situation with SYSCALL/SYSRET
x86/mm: Disable preemption during CR3 read+write
x86/mm/KASLR: Increase BRK pages for KASLR memory randomization
x86/mm/KASLR: Fix physical memory calculation on KASLR memory randomization
x86, kasan, ftrace: Put APIC interrupt handlers into .irqentry.text
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
"Misc fixes: a /dev/rtc regression fix, two APIC timer period
calibration fixes, an ARM clocksource driver fix and a NOHZ
power use regression fix"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/hpet: Fix /dev/rtc breakage caused by RTC cleanup
x86/timers/apic: Inform TSC deadline clockevent device about recalibration
x86/timers/apic: Fix imprecise timer interrupts by eliminating TSC clockevents frequency roundoff error
timers: Fix get_next_timer_interrupt() computation
clocksource/arm_arch_timer: Force per-CPU interrupt to be level-triggered
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