KVM: x86/mmu: Skip calling mmu->sync_spte() when the spte is 0

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Sync the spte only when the spte is set and avoid the indirect branch.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Link: https://lore.kernel.org/r/20230216235321.735214-5-jiangshanlai@gmail.com
[sean: add wrapper instead of open coding each check]
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Lai Jiangshan 2023-02-17 07:53:21 +08:00 • committed by Sean Christopherson

parent 91ca7672dc

commit 19ace7d6ca

2 changed files with 11 additions and 3 deletions

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12

arch/x86/kvm/mmu/mmu.c

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2

arch/x86/kvm/mmu/paging_tmpl.h

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