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| author | Zelin Deng <zelin.deng@linux.alibaba.com> | 2021-04-28 05:22:01 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-06 14:07:03 +0300 |
| commit | d9130a2dfdd4b21736c91b818f87dbc0ccd1e757 (patch) | |
| tree | ccefffafbd89e8eab9ee525e9b12fef527258da1 /arch/mips | |
| parent | 4ac214574d2d83b7ef20c603d75f1937c912bfd6 (diff) | |
| download | linux-d9130a2dfdd4b21736c91b818f87dbc0ccd1e757.tar.xz | |
KVM: x86: Update vCPU's hv_clock before back to guest when tsc_offset is adjusted
When MSR_IA32_TSC_ADJUST is written by guest due to TSC ADJUST feature
especially there's a big tsc warp (like a new vCPU is hot-added into VM
which has been up for a long time), tsc_offset is added by a large value
then go back to guest. This causes system time jump as tsc_timestamp is
not adjusted in the meantime and pvclock monotonic character.
To fix this, just notify kvm to update vCPU's guest time before back to
guest.
Cc: stable@vger.kernel.org
Signed-off-by: Zelin Deng <zelin.deng@linux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1619576521-81399-2-git-send-email-zelin.deng@linux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips')
0 files changed, 0 insertions, 0 deletions