On Fri, Oct 20, 2023, Kirill A. Shutemov wrote: > 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.shute...@linux.intel.com> > Fixes: c02027b5742b ("x86/kvm: Disable kvmclock on all CPUs on shutdown") > Cc: Paolo Bonzini <pbonz...@redhat.com> > Cc: Wanpeng Li <wanpen...@tencent.com> > Cc: Vitaly Kuznetsov <vkuzn...@redhat.com> > Cc: Sean Christopherson <sea...@google.com> > ---
Reviewed-by: Sean Christopherson <sea...@google.com> _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec