KVM: VMX: Re-enter guest in fastpath for "spurious" preemption timer exits

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Re-enter the guest in the fast path if VMX preeemption timer VM-Exit was
"spurious", i.e. if KVM "soft disabled" the timer by writing -1u and by
some miracle the timer expired before any other VM-Exit occurred.  This is
just an intermediate step to cleaning up the preemption timer handling,
optimizing these types of spurious VM-Exits is not interesting as they are
extremely rare/infrequent.

Link: https://lore.kernel.org/r/20240110012705.506918-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-01-09 17:27:01 -08:00

parent 9c9025ea00

commit e6b5d16bbd

1 changed files with 9 additions and 2 deletions

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arch/x86/kvm/vmx/vmx.c

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