KVM: x86: do not deliver asynchronous page faults if CR0.PG=0

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Enabling async page faults is nonsensical if paging is disabled, but
it is allowed because CR0.PG=0 does not clear the async page fault
MSR.  Just ignore them and only use the artificial halt state,
similar to what happens in guest mode if async #PF vmexits are disabled.

Given the increasingly complex logic, and the nicer code if the new
"if" is placed last, opportunistically change the "||" into a chain
of "if (...) return false" statements.

Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2022-02-09 05:17:38 -05:00

parent d617429936

commit 57cb3bb0dc

1 changed files with 18 additions and 4 deletions

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arch/x86/kvm/x86.c

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