github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 09:04:39 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: SVM: Remove references to VCPU_EXREG_CR3

Browse Source 
VCPU_EXREG_CR3 is never cleared from vcpu->arch.regs_avail or
vcpu->arch.regs_dirty in SVM; therefore, marking CR3 as available is
merely a NOP, and testing it will likewise always succeed.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211108124407.12187-9-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Lai Jiangshan 2021-11-08 20:44:00 +08:00 committed by Paolo Bonzini
parent 8f29bf12a3
commit aec9c2402f
2 changed files with 0 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/kvm/svm/nested.c
View File

@ -468,7 +468,6 @@ static int nested_svm_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3,
kvm_mmu_new_pgd(vcpu, cr3);
vcpu->arch.cr3 = cr3;
kvm_register_mark_available(vcpu, VCPU_EXREG_CR3);
/* Re-initialize the MMU, e.g. to pick up CR4 MMU role changes. */
kvm_init_mmu(vcpu);

2
arch/x86/kvm/svm/svm.c
View File

@ -4010,8 +4010,6 @@ static void svm_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa,
hv_track_root_tdp(vcpu, root_hpa);
if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
return;
cr3 = vcpu->arch.cr3;
} else if (vcpu->arch.mmu->shadow_root_level >= PT64_ROOT_4LEVEL) {
cr3 = __sme_set(root_hpa) | kvm_get_active_pcid(vcpu);