https://github.com/torvalds/linux
Revision d7add05458084a5e3d65925764a02ca9c8202c1e authored by Haozhong Zhang on 07 August 2015, 03:24:32 UTC, committed by Paolo Bonzini on 07 August 2015, 11:28:03 UTC
When kvm_set_msr_common() handles a guest's write to MSR_IA32_TSC_ADJUST, it will calcuate an adjustment based on the data written by guest and then use it to adjust TSC offset by calling a call-back adjust_tsc_offset(). The 3rd parameter of adjust_tsc_offset() indicates whether the adjustment is in host TSC cycles or in guest TSC cycles. If SVM TSC scaling is enabled, adjust_tsc_offset() [i.e. svm_adjust_tsc_offset()] will first scale the adjustment; otherwise, it will just use the unscaled one. As the MSR write here comes from the guest, the adjustment is in guest TSC cycles. However, the current kvm_set_msr_common() uses it as a value in host TSC cycles (by using true as the 3rd parameter of adjust_tsc_offset()), which can result in an incorrect adjustment of TSC offset if SVM TSC scaling is enabled. This patch fixes this problem. Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com> Cc: stable@vger.linux.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 18c3626
Tip revision: d7add05458084a5e3d65925764a02ca9c8202c1e authored by Haozhong Zhang on 07 August 2015, 03:24:32 UTC
KVM: x86: Use adjustment in guest cycles when handling MSR_IA32_TSC_ADJUST
KVM: x86: Use adjustment in guest cycles when handling MSR_IA32_TSC_ADJUST
Tip revision: d7add05
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Kconfig | -rw-r--r-- | 22.1 KB |
Kconfig.debug | -rw-r--r-- | 1.2 KB |
Makefile | -rw-r--r-- | 2.6 KB |
backing-dev.c | -rw-r--r-- | 25.5 KB |
balloon_compaction.c | -rw-r--r-- | 6.8 KB |
bootmem.c | -rw-r--r-- | 20.8 KB |
cleancache.c | -rw-r--r-- | 9.9 KB |
cma.c | -rw-r--r-- | 12.1 KB |
cma.h | -rw-r--r-- | 508 bytes |
cma_debug.c | -rw-r--r-- | 4.4 KB |
compaction.c | -rw-r--r-- | 47.3 KB |
debug-pagealloc.c | -rw-r--r-- | 2.6 KB |
debug.c | -rw-r--r-- | 6.5 KB |
dmapool.c | -rw-r--r-- | 13.7 KB |
early_ioremap.c | -rw-r--r-- | 5.4 KB |
fadvise.c | -rw-r--r-- | 3.7 KB |
failslab.c | -rw-r--r-- | 1.3 KB |
filemap.c | -rw-r--r-- | 70.7 KB |
frontswap.c | -rw-r--r-- | 14.3 KB |
gup.c | -rw-r--r-- | 39.0 KB |
highmem.c | -rw-r--r-- | 11.8 KB |
huge_memory.c | -rw-r--r-- | 79.1 KB |
hugetlb.c | -rw-r--r-- | 107.0 KB |
hugetlb_cgroup.c | -rw-r--r-- | 10.4 KB |
hwpoison-inject.c | -rw-r--r-- | 3.3 KB |
init-mm.c | -rw-r--r-- | 619 bytes |
internal.h | -rw-r--r-- | 13.4 KB |
interval_tree.c | -rw-r--r-- | 3.1 KB |
kmemcheck.c | -rw-r--r-- | 2.9 KB |
kmemleak-test.c | -rw-r--r-- | 3.2 KB |
kmemleak.c | -rw-r--r-- | 54.8 KB |
ksm.c | -rw-r--r-- | 63.3 KB |
list_lru.c | -rw-r--r-- | 12.2 KB |
maccess.c | -rw-r--r-- | 1.6 KB |
madvise.c | -rw-r--r-- | 13.9 KB |
memblock.c | -rw-r--r-- | 47.7 KB |
memcontrol.c | -rw-r--r-- | 153.3 KB |
memory-failure.c | -rw-r--r-- | 48.1 KB |
memory.c | -rw-r--r-- | 103.8 KB |
memory_hotplug.c | -rw-r--r-- | 51.2 KB |
mempolicy.c | -rw-r--r-- | 70.6 KB |
mempool.c | -rw-r--r-- | 13.9 KB |
memtest.c | -rw-r--r-- | 3.0 KB |
migrate.c | -rw-r--r-- | 46.7 KB |
mincore.c | -rw-r--r-- | 6.6 KB |
mlock.c | -rw-r--r-- | 19.5 KB |
mm_init.c | -rw-r--r-- | 4.9 KB |
mmap.c | -rw-r--r-- | 89.8 KB |
mmu_context.c | -rw-r--r-- | 1.3 KB |
mmu_notifier.c | -rw-r--r-- | 11.4 KB |
mmzone.c | -rw-r--r-- | 2.3 KB |
mprotect.c | -rw-r--r-- | 10.8 KB |
mremap.c | -rw-r--r-- | 15.3 KB |
msync.c | -rw-r--r-- | 2.6 KB |
nobootmem.c | -rw-r--r-- | 11.1 KB |
nommu.c | -rw-r--r-- | 52.0 KB |
oom_kill.c | -rw-r--r-- | 20.6 KB |
page-writeback.c | -rw-r--r-- | 83.1 KB |
page_alloc.c | -rw-r--r-- | 192.4 KB |
page_counter.c | -rw-r--r-- | 4.8 KB |
page_ext.c | -rw-r--r-- | 10.3 KB |
page_io.c | -rw-r--r-- | 9.4 KB |
page_isolation.c | -rw-r--r-- | 8.7 KB |
page_owner.c | -rw-r--r-- | 7.1 KB |
pagewalk.c | -rw-r--r-- | 7.5 KB |
percpu-km.c | -rw-r--r-- | 2.8 KB |
percpu-vm.c | -rw-r--r-- | 10.0 KB |
percpu.c | -rw-r--r-- | 66.1 KB |
pgtable-generic.c | -rw-r--r-- | 5.7 KB |
process_vm_access.c | -rw-r--r-- | 9.8 KB |
quicklist.c | -rw-r--r-- | 2.4 KB |
readahead.c | -rw-r--r-- | 15.6 KB |
rmap.c | -rw-r--r-- | 43.8 KB |
shmem.c | -rw-r--r-- | 89.3 KB |
slab.c | -rw-r--r-- | 107.0 KB |
slab.h | -rw-r--r-- | 10.5 KB |
slab_common.c | -rw-r--r-- | 27.9 KB |
slob.c | -rw-r--r-- | 15.7 KB |
slub.c | -rw-r--r-- | 127.4 KB |
sparse-vmemmap.c | -rw-r--r-- | 6.0 KB |
sparse.c | -rw-r--r-- | 20.9 KB |
swap.c | -rw-r--r-- | 32.0 KB |
swap_cgroup.c | -rw-r--r-- | 4.6 KB |
swap_state.c | -rw-r--r-- | 12.7 KB |
swapfile.c | -rw-r--r-- | 77.0 KB |
truncate.c | -rw-r--r-- | 23.7 KB |
util.c | -rw-r--r-- | 10.9 KB |
vmacache.c | -rw-r--r-- | 3.1 KB |
vmalloc.c | -rw-r--r-- | 69.0 KB |
vmpressure.c | -rw-r--r-- | 11.4 KB |
vmscan.c | -rw-r--r-- | 110.3 KB |
vmstat.c | -rw-r--r-- | 40.7 KB |
workingset.c | -rw-r--r-- | 13.6 KB |
zbud.c | -rw-r--r-- | 18.2 KB |
zpool.c | -rw-r--r-- | 9.0 KB |
zsmalloc.c | -rw-r--r-- | 45.4 KB |
zswap.c | -rw-r--r-- | 24.8 KB |
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