KVM: x86/mmu: Add helpers to do full reserved SPTE checks w/ generic MMU

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Extract the reserved SPTE check and print helpers in get_mmio_spte() to
new helpers so that KVM can also WARN on reserved badness when making a
SPTE.

Tag the checking helper with __always_inline to improve the probability
of the compiler generating optimal code for the checking loop, e.g. gcc
appears to avoid using %rbp when the helper is tagged with a vanilla
"inline".

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-48-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2021-06-22 10:57:32 -07:00 • committed by Paolo Bonzini

parent 36f267871e

commit 961f84457c

2 changed files with 34 additions and 21 deletions

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23

arch/x86/kvm/mmu/mmu.c

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32

arch/x86/kvm/mmu/spte.h

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