From 2c5e168e5ce154592667a8e384012117c917d790 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 27 Nov 2024 17:34:06 -0800 Subject: KVM: x86: Rename "governed features" helpers to use "guest_cpu_cap" As the first step toward replacing KVM's so-called "governed features" framework with a more comprehensive, less poorly named implementation, replace the "kvm_governed_feature" function prefix with "guest_cpu_cap" and rename guest_can_use() to guest_cpu_cap_has(). The "guest_cpu_cap" naming scheme mirrors that of "kvm_cpu_cap", and provides a more clear distinction between guest capabilities, which are KVM controlled (heh, or one might say "governed"), and guest CPUID, which with few exceptions is fully userspace controlled. Opportunistically rewrite the comment about XSS passthrough for SEV-ES guests to avoid referencing so many functions, as such comments are prone to becoming stale (case in point...). No functional change intended. Reviewed-by: Maxim Levitsky Reviewed-by: Binbin Wu Link: https://lore.kernel.org/r/20241128013424.4096668-40-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/nested.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'arch/x86/kvm/svm/nested.c') diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index b708bdf7eaff..d77b094d9a4d 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -111,7 +111,7 @@ static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) static bool nested_vmcb_needs_vls_intercept(struct vcpu_svm *svm) { - if (!guest_can_use(&svm->vcpu, X86_FEATURE_V_VMSAVE_VMLOAD)) + if (!guest_cpu_cap_has(&svm->vcpu, X86_FEATURE_V_VMSAVE_VMLOAD)) return true; if (!nested_npt_enabled(svm)) @@ -594,7 +594,7 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12 vmcb_mark_dirty(vmcb02, VMCB_DR); } - if (unlikely(guest_can_use(vcpu, X86_FEATURE_LBRV) && + if (unlikely(guest_cpu_cap_has(vcpu, X86_FEATURE_LBRV) && (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) { /* * Reserved bits of DEBUGCTL are ignored. Be consistent with @@ -651,7 +651,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, * exit_int_info, exit_int_info_err, next_rip, insn_len, insn_bytes. */ - if (guest_can_use(vcpu, X86_FEATURE_VGIF) && + if (guest_cpu_cap_has(vcpu, X86_FEATURE_VGIF) && (svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK)) int_ctl_vmcb12_bits |= (V_GIF_MASK | V_GIF_ENABLE_MASK); else @@ -689,7 +689,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, vmcb02->control.tsc_offset = vcpu->arch.tsc_offset; - if (guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR) && + if (guest_cpu_cap_has(vcpu, X86_FEATURE_TSCRATEMSR) && svm->tsc_ratio_msr != kvm_caps.default_tsc_scaling_ratio) nested_svm_update_tsc_ratio_msr(vcpu); @@ -710,7 +710,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, * what a nrips=0 CPU would do (L1 is responsible for advancing RIP * prior to injecting the event). */ - if (guest_can_use(vcpu, X86_FEATURE_NRIPS)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_NRIPS)) vmcb02->control.next_rip = svm->nested.ctl.next_rip; else if (boot_cpu_has(X86_FEATURE_NRIPS)) vmcb02->control.next_rip = vmcb12_rip; @@ -720,7 +720,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, svm->soft_int_injected = true; svm->soft_int_csbase = vmcb12_csbase; svm->soft_int_old_rip = vmcb12_rip; - if (guest_can_use(vcpu, X86_FEATURE_NRIPS)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_NRIPS)) svm->soft_int_next_rip = svm->nested.ctl.next_rip; else svm->soft_int_next_rip = vmcb12_rip; @@ -728,18 +728,18 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm, vmcb02->control.virt_ext = vmcb01->control.virt_ext & LBR_CTL_ENABLE_MASK; - if (guest_can_use(vcpu, X86_FEATURE_LBRV)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_LBRV)) vmcb02->control.virt_ext |= (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK); if (!nested_vmcb_needs_vls_intercept(svm)) vmcb02->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK; - if (guest_can_use(vcpu, X86_FEATURE_PAUSEFILTER)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_PAUSEFILTER)) pause_count12 = svm->nested.ctl.pause_filter_count; else pause_count12 = 0; - if (guest_can_use(vcpu, X86_FEATURE_PFTHRESHOLD)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_PFTHRESHOLD)) pause_thresh12 = svm->nested.ctl.pause_filter_thresh; else pause_thresh12 = 0; @@ -1026,7 +1026,7 @@ int nested_svm_vmexit(struct vcpu_svm *svm) if (vmcb12->control.exit_code != SVM_EXIT_ERR) nested_save_pending_event_to_vmcb12(svm, vmcb12); - if (guest_can_use(vcpu, X86_FEATURE_NRIPS)) + if (guest_cpu_cap_has(vcpu, X86_FEATURE_NRIPS)) vmcb12->control.next_rip = vmcb02->control.next_rip; vmcb12->control.int_ctl = svm->nested.ctl.int_ctl; @@ -1065,7 +1065,7 @@ int nested_svm_vmexit(struct vcpu_svm *svm) if (!nested_exit_on_intr(svm)) kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); - if (unlikely(guest_can_use(vcpu, X86_FEATURE_LBRV) && + if (unlikely(guest_cpu_cap_has(vcpu, X86_FEATURE_LBRV) && (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) { svm_copy_lbrs(vmcb12, vmcb02); svm_update_lbrv(vcpu); -- cgit v1.2.3