Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH 14/15] KVM: X86: Calculate quadrant when !role.gpte_is_8_bytes | Date | Thu, 18 Nov 2021 19:08:13 +0800 |
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From: Lai Jiangshan <laijs@linux.alibaba.com>
role.quadrant is only valid when gpte size is 4 bytes and only be calculated when gpte size is 4 bytes.
Although "vcpu->arch.mmu->root_level <= PT32_ROOT_LEVEL" also means gpte size is 4 bytes, but using "!role.gpte_is_8_bytes" is clearer
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> --- arch/x86/kvm/mmu/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index db8b64971f25..6948f2d696c3 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -2083,7 +2083,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, role.level = level; role.direct = direct; role.access = access; - if (!direct_mmu && vcpu->arch.mmu->root_level <= PT32_ROOT_LEVEL) { + if (!direct_mmu && !role.gpte_is_8_bytes) { quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level)); quadrant &= (1 << ((PT32_PT_BITS - PT64_PT_BITS) * level)) - 1; role.quadrant = quadrant; -- 2.19.1.6.gb485710b
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