From: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx> If root_level >= 4, shadow_root_level must be >= 4 too. Checking only root_level can reduce a check. Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx> --- arch/x86/kvm/mmu/mmu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 9fb9927264d8..1dc8bfd12ecd 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4136,8 +4136,7 @@ static bool fast_pgd_switch(struct kvm_vcpu *vcpu, gpa_t new_pgd, * having to deal with PDPTEs. We may add support for 32-bit hosts/VMs * later if necessary. */ - if (mmu->shadow_root_level >= PT64_ROOT_4LEVEL && - mmu->root_level >= PT64_ROOT_4LEVEL) + if (mmu->root_level >= PT64_ROOT_4LEVEL) return cached_root_available(vcpu, new_pgd, new_role); return false; -- 2.19.1.6.gb485710b
