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linux/arch
Lai Jiangshan af3511ff7f KVM: x86: Ensure PV TLB flush tracepoint reflects KVM behavior
In record_steal_time(), st->preempted is read twice, and
trace_kvm_pv_tlb_flush() might output result inconsistent if
kvm_vcpu_flush_tlb_guest() see a different st->preempted later.

It is a very trivial problem and hardly has actual harm and can be
avoided by reseting and reading st->preempted in atomic way via xchg().

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>

Message-Id: <20210531174628.10265-1-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-06-08 13:15:20 -04:00
..
alpha Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
arc mm: drop redundant HAVE_ARCH_TRANSPARENT_HUGEPAGE 2021-05-05 11:27:25 -07:00
arm Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
arm64 KVM: arm64: Prevent mixed-width VM creation 2021-05-27 10:34:33 +01:00
csky arch/csky patches for 5.13-rc1 2021-05-03 12:58:31 -07:00
h8300 arch: rearrange headers inclusion order in asm/bitops for m68k, sh and h8300 2021-05-06 19:24:11 -07:00
hexagon Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
ia64 Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
m68k Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
microblaze tracing updates for 5.13 2021-05-03 11:19:54 -07:00
mips Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
nds32 tracing updates for 5.13 2021-05-03 11:19:54 -07:00
nios2 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-05-02 09:14:01 -07:00
openrisc drivers/char: remove /dev/kmem for good 2021-05-07 00:26:34 -07:00
parisc Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
powerpc KVM: rename KVM_REQ_PENDING_TIMER to KVM_REQ_UNBLOCK 2021-05-27 07:57:38 -04:00
riscv riscv: remove unused handle_exception symbol 2021-05-06 09:40:16 -07:00
s390 Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
sh Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
sparc Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
um Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
x86 KVM: x86: Ensure PV TLB flush tracepoint reflects KVM behavior 2021-06-08 13:15:20 -04:00
xtensa Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig Add Landlock, a new LSM from Mickaël Salaün <mic@linux.microsoft.com> 2021-05-01 18:50:44 -07:00