diff options
| -rw-r--r-- | arch/x86/include/uapi/asm/svm.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 51 |
2 files changed, 53 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h index 2e8a30f06c74..522d42dfc28c 100644 --- a/arch/x86/include/uapi/asm/svm.h +++ b/arch/x86/include/uapi/asm/svm.h @@ -76,6 +76,7 @@ #define SVM_EXIT_MWAIT_COND 0x08c #define SVM_EXIT_XSETBV 0x08d #define SVM_EXIT_RDPRU 0x08e +#define SVM_EXIT_INVPCID 0x0a2 #define SVM_EXIT_NPF 0x400 #define SVM_EXIT_AVIC_INCOMPLETE_IPI 0x401 #define SVM_EXIT_AVIC_UNACCELERATED_ACCESS 0x402 @@ -171,6 +172,7 @@ { SVM_EXIT_MONITOR, "monitor" }, \ { SVM_EXIT_MWAIT, "mwait" }, \ { SVM_EXIT_XSETBV, "xsetbv" }, \ + { SVM_EXIT_INVPCID, "invpcid" }, \ { SVM_EXIT_NPF, "npf" }, \ { SVM_EXIT_AVIC_INCOMPLETE_IPI, "avic_incomplete_ipi" }, \ { SVM_EXIT_AVIC_UNACCELERATED_ACCESS, "avic_unaccelerated_access" }, \ diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 633b6249bcb8..259a724c69c7 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -824,6 +824,9 @@ static __init void svm_set_cpu_caps(void) if (boot_cpu_has(X86_FEATURE_LS_CFG_SSBD) || boot_cpu_has(X86_FEATURE_AMD_SSBD)) kvm_cpu_cap_set(X86_FEATURE_VIRT_SSBD); + + /* Enable INVPCID feature */ + kvm_cpu_cap_check_and_set(X86_FEATURE_INVPCID); } static __init int svm_hardware_setup(void) @@ -996,6 +999,21 @@ static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) return svm->vmcb->control.tsc_offset; } +static void svm_check_invpcid(struct vcpu_svm *svm) +{ + /* + * Intercept INVPCID instruction only if shadow page table is + * enabled. Interception is not required with nested page table + * enabled. + */ + if (kvm_cpu_cap_has(X86_FEATURE_INVPCID)) { + if (!npt_enabled) + svm_set_intercept(svm, INTERCEPT_INVPCID); + else + svm_clr_intercept(svm, INTERCEPT_INVPCID); + } +} + static void init_vmcb(struct vcpu_svm *svm) { struct vmcb_control_area *control = &svm->vmcb->control; @@ -1125,6 +1143,8 @@ static void init_vmcb(struct vcpu_svm *svm) svm_clr_intercept(svm, INTERCEPT_PAUSE); } + svm_check_invpcid(svm); + if (kvm_vcpu_apicv_active(&svm->vcpu)) avic_init_vmcb(svm); @@ -2729,6 +2749,33 @@ static int mwait_interception(struct vcpu_svm *svm) return nop_interception(svm); } +static int invpcid_interception(struct vcpu_svm *svm) +{ + struct kvm_vcpu *vcpu = &svm->vcpu; + unsigned long type; + gva_t gva; + + if (!guest_cpuid_has(vcpu, X86_FEATURE_INVPCID)) { + kvm_queue_exception(vcpu, UD_VECTOR); + return 1; + } + + /* + * For an INVPCID intercept: + * EXITINFO1 provides the linear address of the memory operand. + * EXITINFO2 provides the contents of the register operand. + */ + type = svm->vmcb->control.exit_info_2; + gva = svm->vmcb->control.exit_info_1; + + if (type > 3) { + kvm_inject_gp(vcpu, 0); + return 1; + } + + return kvm_handle_invpcid(vcpu, type, gva); +} + static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = { [SVM_EXIT_READ_CR0] = cr_interception, [SVM_EXIT_READ_CR3] = cr_interception, @@ -2791,6 +2838,7 @@ static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = { [SVM_EXIT_MWAIT] = mwait_interception, [SVM_EXIT_XSETBV] = xsetbv_interception, [SVM_EXIT_RDPRU] = rdpru_interception, + [SVM_EXIT_INVPCID] = invpcid_interception, [SVM_EXIT_NPF] = npf_interception, [SVM_EXIT_RSM] = rsm_interception, [SVM_EXIT_AVIC_INCOMPLETE_IPI] = avic_incomplete_ipi_interception, @@ -3619,6 +3667,9 @@ static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu) svm->nrips_enabled = kvm_cpu_cap_has(X86_FEATURE_NRIPS) && guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS); + /* Check again if INVPCID interception if required */ + svm_check_invpcid(svm); + if (!kvm_vcpu_apicv_active(vcpu)) return; |