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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-12-05 01:45:01 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-01-08 18:14:41 +0100 |
| commit | 1c6d984f523f67ecfad1083bb04c55d91977bb15 (patch) | |
| tree | eab97f8ec6bcf5c56e448e1e0cfa8a5d62944eba /fs/userfaultfd.c | |
| parent | Merge tag 'kvm-x86-mmu-6.8' of https://github.com/kvm-x86/linux into HEAD (diff) | |
| download | linux-1c6d984f523f67ecfad1083bb04c55d91977bb15.tar.xz linux-1c6d984f523f67ecfad1083bb04c55d91977bb15.zip | |
x86/kvm: Do not try to disable kvmclock if it was not enabled
kvm_guest_cpu_offline() tries to disable kvmclock regardless if it is
present in the VM. It leads to write to a MSR that doesn't exist on some
configurations, namely in TDX guest:
unchecked MSR access error: WRMSR to 0x12 (tried to write 0x0000000000000000)
at rIP: 0xffffffff8110687c (kvmclock_disable+0x1c/0x30)
kvmclock enabling is gated by CLOCKSOURCE and CLOCKSOURCE2 KVM paravirt
features.
Do not disable kvmclock if it was not enabled.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Fixes: c02027b5742b ("x86/kvm: Disable kvmclock on all CPUs on shutdown")
Reviewed-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: stable@vger.kernel.org
Message-Id: <20231205004510.27164-6-kirill.shutemov@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'fs/userfaultfd.c')
0 files changed, 0 insertions, 0 deletions