diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-11-28 16:39:58 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-08-10 17:44:04 +0300 |
| commit | eebed2438923f8df465c27f8fa41303771fdb2e8 (patch) | |
| tree | a767edc12e331314c03493ef5172248334350f71 /arch/x86/kvm/mmu.c | |
| parent | 64531a3b70b17c8d3e77f2e49e5e1bb70f571266 (diff) | |
| download | linux-eebed2438923f8df465c27f8fa41303771fdb2e8.tar.xz | |
kvm: nVMX: Add support for fast unprotection of nested guest page tables
This is the same as commit 147277540bbc ("kvm: svm: Add support for
additional SVM NPF error codes", 2016-11-23), but for Intel processors.
In this case, the exit qualification field's bit 8 says whether the
EPT violation occurred while translating the guest's final physical
address or rather while translating the guest page tables.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 454d81dc8913..7ee21c087c83 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -4836,12 +4836,9 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code, * This can occur when using nested virtualization with nested * paging in both guests. If true, we simply unprotect the page * and resume the guest. - * - * Note: AMD only (since it supports the PFERR_GUEST_PAGE_MASK used - * in PFERR_NEXT_GUEST_PAGE) */ if (vcpu->arch.mmu.direct_map && - error_code == PFERR_NESTED_GUEST_PAGE) { + (error_code & PFERR_NESTED_GUEST_PAGE) == PFERR_NESTED_GUEST_PAGE) { kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2)); return 1; } |