KVM: x86/mmu: Exit to userspace on make_mmu_pages_available() error

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Propagate any error returned by make_mmu_pages_available() out to
userspace instead of resuming the guest if the error occurs while
handling a page fault.  Now that zapping the oldest MMU pages skips
active roots, i.e. fails if and only if there are no zappable pages,
there is no chance for a false positive, i.e. no chance of returning a
spurious error to userspace.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200623193542.7554-5-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-06-23 12:35:42 -07:00 • committed by Paolo Bonzini

parent ebdb292dac

commit 7bd7ded642

2 changed files with 4 additions and 2 deletions

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3

arch/x86/kvm/mmu/mmu.c

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3

arch/x86/kvm/mmu/paging_tmpl.h

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