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| author | Junaid Shahid <junaids@google.com> | 2018-04-26 13:09:50 -0700 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2018-04-27 17:44:00 +0200 |
| commit | a468f2dbf921d02f5107378501693137a812999b (patch) | |
| tree | 3c2ef3d3a36ce526683aa23e81cb03a71f9e44bb /arch | |
| parent | 06e22bb6fa5bd2d7d6cdd4d886aef90c3ef8f9c7 (diff) | |
| download | linux-a468f2dbf921d02f5107378501693137a812999b.tar.gz | |
kvm: apic: Flush TLB after APIC mode/address change if VPIDs are in use
Currently, KVM flushes the TLB after a change to the APIC access page address or the APIC mode when EPT mode is enabled. However, even in shadow paging mode, a TLB flush is needed if VPIDs are being used, as specified in the Intel SDM Section 29.4.5. So replace vmx_flush_tlb_ept_only() with vmx_flush_tlb(), which will flush if either EPT or VPIDs are in use. Signed-off-by: Junaid Shahid <junaids@google.com> Reviewed-by: Jim Mattson <jmattson@google.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index aa66ccd6ed6c..c7668806163f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4544,12 +4544,6 @@ static void vmx_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa) __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid, invalidate_gpa); } -static void vmx_flush_tlb_ept_only(struct kvm_vcpu *vcpu) -{ - if (enable_ept) - vmx_flush_tlb(vcpu, true); -} - static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) { ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; @@ -9278,7 +9272,7 @@ static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set) } else { sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; - vmx_flush_tlb_ept_only(vcpu); + vmx_flush_tlb(vcpu, true); } vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control); @@ -9306,7 +9300,7 @@ static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu, hpa_t hpa) !nested_cpu_has2(get_vmcs12(&vmx->vcpu), SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { vmcs_write64(APIC_ACCESS_ADDR, hpa); - vmx_flush_tlb_ept_only(vcpu); + vmx_flush_tlb(vcpu, true); } } @@ -11220,7 +11214,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, } } else if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { - vmx_flush_tlb_ept_only(vcpu); + vmx_flush_tlb(vcpu, true); } /* @@ -12073,7 +12067,7 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, } else if (!nested_cpu_has_ept(vmcs12) && nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { - vmx_flush_tlb_ept_only(vcpu); + vmx_flush_tlb(vcpu, true); } /* This is needed for same reason as it was needed in prepare_vmcs02 */ |