diff options
| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-11-11 22:45:26 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:25:04 -0500 |
| commit | 24cd19a28cb7174df502162641d6e1e12e7ffbd9 (patch) | |
| tree | 2b4992a5199ca2e376bb5ecd800c6200be98b0f2 /arch | |
| parent | 2e9ebd55096f70b76c2a5edf93903c8c2f778a9f (diff) | |
KVM: X86: Update mmu->pdptrs only when it is changed
It is unchanged in most cases.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211111144527.88852-1-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index be3b4a073e72..d4f1dff258cc 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -828,9 +828,12 @@ int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) } } - memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); - kvm_register_mark_dirty(vcpu, VCPU_EXREG_PDPTR); - kvm_make_request(KVM_REQ_LOAD_MMU_PGD, vcpu); + kvm_register_mark_available(vcpu, VCPU_EXREG_PDPTR); + if (memcmp(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs))) { + memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); + kvm_register_mark_dirty(vcpu, VCPU_EXREG_PDPTR); + kvm_make_request(KVM_REQ_LOAD_MMU_PGD, vcpu); + } vcpu->arch.pdptrs_from_userspace = false; return 1; |