diff options
| author | Lan Tianyu <Tianyu.Lan@microsoft.com> | 2018-12-06 08:34:36 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-12-14 18:00:02 +0100 |
| commit | 53963a70ac268c8e813e6d5cd24cbd1b03f56059 (patch) | |
| tree | 8c7a8e61c15a2fd0695caeb3acd8f2f432cb37ba /arch/x86/kvm/vmx/vmx.c | |
| parent | KVM nVMX: MSRs should not be stored if VM-entry fails during or after loading... (diff) | |
| download | linux-53963a70ac268c8e813e6d5cd24cbd1b03f56059.tar.xz linux-53963a70ac268c8e813e6d5cd24cbd1b03f56059.zip | |
KVM/VMX: Check ept_pointer before flushing ept tlb
This patch is to initialize ept_pointer to INVALID_PAGE and check it
before flushing ept tlb. If ept_pointer is invalid, bypass the flush
request.
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index ddaae1d4cd49..c3461f835445 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -423,11 +423,18 @@ static int vmx_hv_remote_flush_tlb(struct kvm *kvm) /* * FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE hypercall needs the address of the * base of EPT PML4 table, strip off EPT configuration information. + * If ept_pointer is invalid pointer, bypass the flush request. */ if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) { - kvm_for_each_vcpu(i, vcpu, kvm) + kvm_for_each_vcpu(i, vcpu, kvm) { + u64 ept_pointer = to_vmx(vcpu)->ept_pointer; + + if (!VALID_PAGE(ept_pointer)) + continue; + ret |= hyperv_flush_guest_mapping( - to_vmx(kvm_get_vcpu(kvm, i))->ept_pointer & PAGE_MASK); + ept_pointer & PAGE_MASK); + } } else { ret = hyperv_flush_guest_mapping( to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer & PAGE_MASK); @@ -6433,6 +6440,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) vmx->pi_desc.nv = POSTED_INTR_VECTOR; vmx->pi_desc.sn = 1; + vmx->ept_pointer = INVALID_PAGE; + return &vmx->vcpu; free_vmcs: |