static __init void vmx_set_cpu_caps(void kvm_cpu_cap_clear(X86_FEATURE_SHSTK); kvm_cpu_cap_clear(X86_FEATURE_IBT); } + + kvm_setup_xss_caps(); } static bool vmx_is_io_intercepted(struct kvm_vcpu *vcpu, --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -9954,6 +9954,23 @@ static struct notifier_block pvclock_gto }; #endif +void kvm_setup_xss_caps(void) +{ + if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES)) + kvm_caps.supported_xss = 0; + + if (!kvm_cpu_cap_has(X86_FEATURE_SHSTK) && + !kvm_cpu_cap_has(X86_FEATURE_IBT)) + kvm_caps.supported_xss &= ~XFEATURE_MASK_CET_ALL; + + if ((kvm_caps.supported_xss & XFEATURE_MASK_CET_ALL) != XFEATURE_MASK_CET_ALL) { + kvm_cpu_cap_clear(X86_FEATURE_SHSTK); + kvm_cpu_cap_clear(X86_FEATURE_IBT); + kvm_caps.supported_xss &= ~XFEATURE_MASK_CET_ALL; + } +} +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_setup_xss_caps); + static inline void kvm_ops_update(struct kvm_x86_init_ops *ops) { memcpy(&kvm_x86_ops, ops->runtime_ops, sizeof(kvm_x86_ops)); @@ -10132,19 +10149,6 @@ int kvm_x86_vendor_init(struct kvm_x86_i if (!tdp_enabled) kvm_caps.supported_quirks &= ~KVM_X86_QUIRK_IGNORE_GUEST_PAT; - if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES)) - kvm_caps.supported_xss = 0; - - if (!kvm_cpu_cap_has(X86_FEATURE_SHSTK) && - !kvm_cpu_cap_has(X86_FEATURE_IBT)) - kvm_caps.supported_xss &= ~XFEATURE_MASK_CET_ALL; - - if ((kvm_caps.supported_xss & XFEATURE_MASK_CET_ALL) != XFEATURE_MASK_CET_ALL) { - kvm_cpu_cap_clear(X86_FEATURE_SHSTK); - kvm_cpu_cap_clear(X86_FEATURE_IBT); - kvm_caps.supported_xss &= ~XFEATURE_MASK_CET_ALL; - } - if (kvm_caps.has_tsc_control) { /* * Make sure the user can only configure tsc_khz values that --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -457,6 +457,8 @@ extern struct kvm_host_values kvm_host; extern bool enable_pmu; +void kvm_setup_xss_caps(void); + /* * Get a filtered version of KVM's supported XCR0 that strips out dynamic * features for which the current process doesn't (yet) have permission to use.[PATCH 6.18 004/175] KVM: x86: Explicitly configure supported XSS from {svm,vmx}_set_cpu_caps()Greg Kroah-Hartman undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined undefined undefined undefined‘1…ę.