diff options
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/capabilities.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/common.h | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/main.c | 265 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 75 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/pmu_intel.c | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/posted_intr.c | 153 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/posted_intr.h | 15 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/run_flags.h | 10 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/tdx.c | 189 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/tdx.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/vmenter.S | 3 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 321 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.h | 60 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/x86_ops.h | 82 |
14 files changed, 537 insertions, 652 deletions
diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h index cb6588238f46..5316c27f6099 100644 --- a/arch/x86/kvm/vmx/capabilities.h +++ b/arch/x86/kvm/vmx/capabilities.h @@ -15,7 +15,6 @@ extern bool __read_mostly enable_ept; extern bool __read_mostly enable_unrestricted_guest; extern bool __read_mostly enable_ept_ad_bits; extern bool __read_mostly enable_pml; -extern bool __read_mostly enable_ipiv; extern int __read_mostly pt_mode; #define PT_MODE_SYSTEM 0 diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h index 8f46a06e2c44..bc5ece76533a 100644 --- a/arch/x86/kvm/vmx/common.h +++ b/arch/x86/kvm/vmx/common.h @@ -53,8 +53,6 @@ struct vcpu_vt { #ifdef CONFIG_X86_64 u64 msr_host_kernel_gs_base; #endif - - unsigned long host_debugctlmsr; }; #ifdef CONFIG_KVM_INTEL_TDX @@ -71,8 +69,8 @@ static __always_inline bool is_td_vcpu(struct kvm_vcpu *vcpu) #else -static inline bool is_td(struct kvm *kvm) { return false; } -static inline bool is_td_vcpu(struct kvm_vcpu *vcpu) { return false; } +static __always_inline bool is_td(struct kvm *kvm) { return false; } +static __always_inline bool is_td_vcpu(struct kvm_vcpu *vcpu) { return false; } #endif diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c index 94d5d907d37b..dbab1c15b0cd 100644 --- a/arch/x86/kvm/vmx/main.c +++ b/arch/x86/kvm/vmx/main.c @@ -12,7 +12,6 @@ #ifdef CONFIG_KVM_INTEL_TDX static_assert(offsetof(struct vcpu_vmx, vt) == offsetof(struct vcpu_tdx, vt)); -#endif static void vt_disable_virtualization_cpu(void) { @@ -30,40 +29,8 @@ static __init int vt_hardware_setup(void) if (ret) return ret; - /* - * Update vt_x86_ops::vm_size here so it is ready before - * kvm_ops_update() is called in kvm_x86_vendor_init(). - * - * Note, the actual bringing up of TDX must be done after - * kvm_ops_update() because enabling TDX requires enabling - * hardware virtualization first, i.e., all online CPUs must - * be in post-VMXON state. This means the @vm_size here - * may be updated to TDX's size but TDX may fail to enable - * at later time. - * - * The VMX/VT code could update kvm_x86_ops::vm_size again - * after bringing up TDX, but this would require exporting - * either kvm_x86_ops or kvm_ops_update() from the base KVM - * module, which looks overkill. Anyway, the worst case here - * is KVM may allocate couple of more bytes than needed for - * each VM. - */ - if (enable_tdx) { - vt_x86_ops.vm_size = max_t(unsigned int, vt_x86_ops.vm_size, - sizeof(struct kvm_tdx)); - /* - * Note, TDX may fail to initialize in a later time in - * vt_init(), in which case it is not necessary to setup - * those callbacks. But making them valid here even - * when TDX fails to init later is fine because those - * callbacks won't be called if the VM isn't TDX guest. - */ - vt_x86_ops.link_external_spt = tdx_sept_link_private_spt; - vt_x86_ops.set_external_spte = tdx_sept_set_private_spte; - vt_x86_ops.free_external_spt = tdx_sept_free_private_spt; - vt_x86_ops.remove_external_spte = tdx_sept_remove_private_spte; - vt_x86_ops.protected_apic_has_interrupt = tdx_protected_apic_has_interrupt; - } + if (enable_tdx) + tdx_hardware_setup(); return 0; } @@ -176,12 +143,12 @@ static int vt_vcpu_pre_run(struct kvm_vcpu *vcpu) return vmx_vcpu_pre_run(vcpu); } -static fastpath_t vt_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) +static fastpath_t vt_vcpu_run(struct kvm_vcpu *vcpu, u64 run_flags) { if (is_td_vcpu(vcpu)) - return tdx_vcpu_run(vcpu, force_immediate_exit); + return tdx_vcpu_run(vcpu, run_flags); - return vmx_vcpu_run(vcpu, force_immediate_exit); + return vmx_vcpu_run(vcpu, run_flags); } static int vt_handle_exit(struct kvm_vcpu *vcpu, @@ -221,7 +188,7 @@ static int vt_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return vmx_get_msr(vcpu, msr_info); } -static void vt_msr_filter_changed(struct kvm_vcpu *vcpu) +static void vt_recalc_msr_intercepts(struct kvm_vcpu *vcpu) { /* * TDX doesn't allow VMM to configure interception of MSR accesses. @@ -232,7 +199,7 @@ static void vt_msr_filter_changed(struct kvm_vcpu *vcpu) if (is_td_vcpu(vcpu)) return; - vmx_msr_filter_changed(vcpu); + vmx_recalc_msr_intercepts(vcpu); } static int vt_complete_emulated_msr(struct kvm_vcpu *vcpu, int err) @@ -240,7 +207,7 @@ static int vt_complete_emulated_msr(struct kvm_vcpu *vcpu, int err) if (is_td_vcpu(vcpu)) return tdx_complete_emulated_msr(vcpu, err); - return kvm_complete_insn_gp(vcpu, err); + return vmx_complete_emulated_msr(vcpu, err); } #ifdef CONFIG_KVM_SMM @@ -315,14 +282,6 @@ static void vt_set_virtual_apic_mode(struct kvm_vcpu *vcpu) return vmx_set_virtual_apic_mode(vcpu); } -static void vt_apicv_pre_state_restore(struct kvm_vcpu *vcpu) -{ - struct pi_desc *pi = vcpu_to_pi_desc(vcpu); - - pi_clear_on(pi); - memset(pi->pir, 0, sizeof(pi->pir)); -} - static void vt_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr) { if (is_td_vcpu(vcpu)) @@ -498,14 +457,6 @@ static void vt_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) vmx_set_gdt(vcpu, dt); } -static void vt_set_dr6(struct kvm_vcpu *vcpu, unsigned long val) -{ - if (is_td_vcpu(vcpu)) - return; - - vmx_set_dr6(vcpu, val); -} - static void vt_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) { if (is_td_vcpu(vcpu)) @@ -888,6 +839,13 @@ static int vt_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn) return 0; } +#define vt_op(name) vt_##name +#define vt_op_tdx_only(name) vt_##name +#else /* CONFIG_KVM_INTEL_TDX */ +#define vt_op(name) vmx_##name +#define vt_op_tdx_only(name) NULL +#endif /* CONFIG_KVM_INTEL_TDX */ + #define VMX_REQUIRED_APICV_INHIBITS \ (BIT(APICV_INHIBIT_REASON_DISABLED) | \ BIT(APICV_INHIBIT_REASON_ABSENT) | \ @@ -905,152 +863,153 @@ struct kvm_x86_ops vt_x86_ops __initdata = { .hardware_unsetup = vmx_hardware_unsetup, .enable_virtualization_cpu = vmx_enable_virtualization_cpu, - .disable_virtualization_cpu = vt_disable_virtualization_cpu, + .disable_virtualization_cpu = vt_op(disable_virtualization_cpu), .emergency_disable_virtualization_cpu = vmx_emergency_disable_virtualization_cpu, - .has_emulated_msr = vt_has_emulated_msr, + .has_emulated_msr = vt_op(has_emulated_msr), .vm_size = sizeof(struct kvm_vmx), - .vm_init = vt_vm_init, - .vm_pre_destroy = vt_vm_pre_destroy, - .vm_destroy = vt_vm_destroy, + .vm_init = vt_op(vm_init), + .vm_destroy = vt_op(vm_destroy), + .vm_pre_destroy = vt_op_tdx_only(vm_pre_destroy), + + .vcpu_precreate = vt_op(vcpu_precreate), + .vcpu_create = vt_op(vcpu_create), + .vcpu_free = vt_op(vcpu_free), + .vcpu_reset = vt_op(vcpu_reset), - .vcpu_precreate = vt_vcpu_precreate, - .vcpu_create = vt_vcpu_create, - .vcpu_free = vt_vcpu_free, - .vcpu_reset = vt_vcpu_reset, + .prepare_switch_to_guest = vt_op(prepare_switch_to_guest), + .vcpu_load = vt_op(vcpu_load), + .vcpu_put = vt_op(vcpu_put), - .prepare_switch_to_guest = vt_prepare_switch_to_guest, - .vcpu_load = vt_vcpu_load, - .vcpu_put = vt_vcpu_put, + .HOST_OWNED_DEBUGCTL = VMX_HOST_OWNED_DEBUGCTL_BITS, - .update_exception_bitmap = vt_update_exception_bitmap, + .update_exception_bitmap = vt_op(update_exception_bitmap), .get_feature_msr = vmx_get_feature_msr, - .get_msr = vt_get_msr, - .set_msr = vt_set_msr, - - .get_segment_base = vt_get_segment_base, - .get_segment = vt_get_segment, - .set_segment = vt_set_segment, - .get_cpl = vt_get_cpl, - .get_cpl_no_cache = vt_get_cpl_no_cache, - .get_cs_db_l_bits = vt_get_cs_db_l_bits, - .is_valid_cr0 = vt_is_valid_cr0, - .set_cr0 = vt_set_cr0, - .is_valid_cr4 = vt_is_valid_cr4, - .set_cr4 = vt_set_cr4, - .set_efer = vt_set_efer, - .get_idt = vt_get_idt, - .set_idt = vt_set_idt, - .get_gdt = vt_get_gdt, - .set_gdt = vt_set_gdt, - .set_dr6 = vt_set_dr6, - .set_dr7 = vt_set_dr7, - .sync_dirty_debug_regs = vt_sync_dirty_debug_regs, - .cache_reg = vt_cache_reg, - .get_rflags = vt_get_rflags, - .set_rflags = vt_set_rflags, - .get_if_flag = vt_get_if_flag, - - .flush_tlb_all = vt_flush_tlb_all, - .flush_tlb_current = vt_flush_tlb_current, - .flush_tlb_gva = vt_flush_tlb_gva, - .flush_tlb_guest = vt_flush_tlb_guest, - - .vcpu_pre_run = vt_vcpu_pre_run, - .vcpu_run = vt_vcpu_run, - .handle_exit = vt_handle_exit, + .get_msr = vt_op(get_msr), + .set_msr = vt_op(set_msr), + + .get_segment_base = vt_op(get_segment_base), + .get_segment = vt_op(get_segment), + .set_segment = vt_op(set_segment), + .get_cpl = vt_op(get_cpl), + .get_cpl_no_cache = vt_op(get_cpl_no_cache), + .get_cs_db_l_bits = vt_op(get_cs_db_l_bits), + .is_valid_cr0 = vt_op(is_valid_cr0), + .set_cr0 = vt_op(set_cr0), + .is_valid_cr4 = vt_op(is_valid_cr4), + .set_cr4 = vt_op(set_cr4), + .set_efer = vt_op(set_efer), + .get_idt = vt_op(get_idt), + .set_idt = vt_op(set_idt), + .get_gdt = vt_op(get_gdt), + .set_gdt = vt_op(set_gdt), + .set_dr7 = vt_op(set_dr7), + .sync_dirty_debug_regs = vt_op(sync_dirty_debug_regs), + .cache_reg = vt_op(cache_reg), + .get_rflags = vt_op(get_rflags), + .set_rflags = vt_op(set_rflags), + .get_if_flag = vt_op(get_if_flag), + + .flush_tlb_all = vt_op(flush_tlb_all), + .flush_tlb_current = vt_op(flush_tlb_current), + .flush_tlb_gva = vt_op(flush_tlb_gva), + .flush_tlb_guest = vt_op(flush_tlb_guest), + + .vcpu_pre_run = vt_op(vcpu_pre_run), + .vcpu_run = vt_op(vcpu_run), + .handle_exit = vt_op(handle_exit), .skip_emulated_instruction = vmx_skip_emulated_instruction, .update_emulated_instruction = vmx_update_emulated_instruction, - .set_interrupt_shadow = vt_set_interrupt_shadow, - .get_interrupt_shadow = vt_get_interrupt_shadow, - .patch_hypercall = vt_patch_hypercall, - .inject_irq = vt_inject_irq, - .inject_nmi = vt_inject_nmi, - .inject_exception = vt_inject_exception, - .cancel_injection = vt_cancel_injection, - .interrupt_allowed = vt_interrupt_allowed, - .nmi_allowed = vt_nmi_allowed, - .get_nmi_mask = vt_get_nmi_mask, - .set_nmi_mask = vt_set_nmi_mask, - .enable_nmi_window = vt_enable_nmi_window, - .enable_irq_window = vt_enable_irq_window, - .update_cr8_intercept = vt_update_cr8_intercept, + .set_interrupt_shadow = vt_op(set_interrupt_shadow), + .get_interrupt_shadow = vt_op(get_interrupt_shadow), + .patch_hypercall = vt_op(patch_hypercall), + .inject_irq = vt_op(inject_irq), + .inject_nmi = vt_op(inject_nmi), + .inject_exception = vt_op(inject_exception), + .cancel_injection = vt_op(cancel_injection), + .interrupt_allowed = vt_op(interrupt_allowed), + .nmi_allowed = vt_op(nmi_allowed), + .get_nmi_mask = vt_op(get_nmi_mask), + .set_nmi_mask = vt_op(set_nmi_mask), + .enable_nmi_window = vt_op(enable_nmi_window), + .enable_irq_window = vt_op(enable_irq_window), + .update_cr8_intercept = vt_op(update_cr8_intercept), .x2apic_icr_is_split = false, - .set_virtual_apic_mode = vt_set_virtual_apic_mode, - .set_apic_access_page_addr = vt_set_apic_access_page_addr, - .refresh_apicv_exec_ctrl = vt_refresh_apicv_exec_ctrl, - .load_eoi_exitmap = vt_load_eoi_exitmap, - .apicv_pre_state_restore = vt_apicv_pre_state_restore, + .set_virtual_apic_mode = vt_op(set_virtual_apic_mode), + .set_apic_access_page_addr = vt_op(set_apic_access_page_addr), + .refresh_apicv_exec_ctrl = vt_op(refresh_apicv_exec_ctrl), + .load_eoi_exitmap = vt_op(load_eoi_exitmap), + .apicv_pre_state_restore = pi_apicv_pre_state_restore, .required_apicv_inhibits = VMX_REQUIRED_APICV_INHIBITS, - .hwapic_isr_update = vt_hwapic_isr_update, - .sync_pir_to_irr = vt_sync_pir_to_irr, - .deliver_interrupt = vt_deliver_interrupt, + .hwapic_isr_update = vt_op(hwapic_isr_update), + .sync_pir_to_irr = vt_op(sync_pir_to_irr), + .deliver_interrupt = vt_op(deliver_interrupt), .dy_apicv_has_pending_interrupt = pi_has_pending_interrupt, - .set_tss_addr = vt_set_tss_addr, - .set_identity_map_addr = vt_set_identity_map_addr, + .set_tss_addr = vt_op(set_tss_addr), + .set_identity_map_addr = vt_op(set_identity_map_addr), .get_mt_mask = vmx_get_mt_mask, - .get_exit_info = vt_get_exit_info, - .get_entry_info = vt_get_entry_info, + .get_exit_info = vt_op(get_exit_info), + .get_entry_info = vt_op(get_entry_info), - .vcpu_after_set_cpuid = vt_vcpu_after_set_cpuid, + .vcpu_after_set_cpuid = vt_op(vcpu_after_set_cpuid), .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, - .get_l2_tsc_offset = vt_get_l2_tsc_offset, - .get_l2_tsc_multiplier = vt_get_l2_tsc_multiplier, - .write_tsc_offset = vt_write_tsc_offset, - .write_tsc_multiplier = vt_write_tsc_multiplier, + .get_l2_tsc_offset = vt_op(get_l2_tsc_offset), + .get_l2_tsc_multiplier = vt_op(get_l2_tsc_multiplier), + .write_tsc_offset = vt_op(write_tsc_offset), + .write_tsc_multiplier = vt_op(write_tsc_multiplier), - .load_mmu_pgd = vt_load_mmu_pgd, + .load_mmu_pgd = vt_op(load_mmu_pgd), .check_intercept = vmx_check_intercept, .handle_exit_irqoff = vmx_handle_exit_irqoff, - .update_cpu_dirty_logging = vt_update_cpu_dirty_logging, + .update_cpu_dirty_logging = vt_op(update_cpu_dirty_logging), .nested_ops = &vmx_nested_ops, .pi_update_irte = vmx_pi_update_irte, - .pi_start_assignment = vmx_pi_start_assignment, + .pi_start_bypass = vmx_pi_start_bypass, #ifdef CONFIG_X86_64 - .set_hv_timer = vt_set_hv_timer, - .cancel_hv_timer = vt_cancel_hv_timer, + .set_hv_timer = vt_op(set_hv_timer), + .cancel_hv_timer = vt_op(cancel_hv_timer), #endif - .setup_mce = vt_setup_mce, + .setup_mce = vt_op(setup_mce), #ifdef CONFIG_KVM_SMM - .smi_allowed = vt_smi_allowed, - .enter_smm = vt_enter_smm, - .leave_smm = vt_leave_smm, - .enable_smi_window = vt_enable_smi_window, + .smi_allowed = vt_op(smi_allowed), + .enter_smm = vt_op(enter_smm), + .leave_smm = vt_op(leave_smm), + .enable_smi_window = vt_op(enable_smi_window), #endif - .check_emulate_instruction = vt_check_emulate_instruction, - .apic_init_signal_blocked = vt_apic_init_signal_blocked, + .check_emulate_instruction = vt_op(check_emulate_instruction), + .apic_init_signal_blocked = vt_op(apic_init_signal_blocked), .migrate_timers = vmx_migrate_timers, - .msr_filter_changed = vt_msr_filter_changed, - .complete_emulated_msr = vt_complete_emulated_msr, + .recalc_msr_intercepts = vt_op(recalc_msr_intercepts), + .complete_emulated_msr = vt_op(complete_emulated_msr), .vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector, .get_untagged_addr = vmx_get_untagged_addr, - .mem_enc_ioctl = vt_mem_enc_ioctl, - .vcpu_mem_enc_ioctl = vt_vcpu_mem_enc_ioctl, + .mem_enc_ioctl = vt_op_tdx_only(mem_enc_ioctl), + .vcpu_mem_enc_ioctl = vt_op_tdx_only(vcpu_mem_enc_ioctl), - .private_max_mapping_level = vt_gmem_private_max_mapping_level + .private_max_mapping_level = vt_op_tdx_only(gmem_private_max_mapping_level) }; struct kvm_x86_init_ops vt_init_ops __initdata = { - .hardware_setup = vt_hardware_setup, + .hardware_setup = vt_op(hardware_setup), .handle_intel_pt_intr = NULL, .runtime_ops = &vt_x86_ops, diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 71701e2414a4..b8ea1969113d 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -302,7 +302,7 @@ static void vmx_switch_vmcs(struct kvm_vcpu *vcpu, struct loaded_vmcs *vmcs) cpu = get_cpu(); prev = vmx->loaded_vmcs; vmx->loaded_vmcs = vmcs; - vmx_vcpu_load_vmcs(vcpu, cpu, prev); + vmx_vcpu_load_vmcs(vcpu, cpu); vmx_sync_vmcs_host_state(vmx, prev); put_cpu(); @@ -715,6 +715,12 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, MSR_IA32_FLUSH_CMD, MSR_TYPE_W); + nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, + MSR_IA32_APERF, MSR_TYPE_R); + + nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, + MSR_IA32_MPERF, MSR_TYPE_R); + kvm_vcpu_unmap(vcpu, &map); vmx->nested.force_msr_bitmap_recalc = false; @@ -825,12 +831,30 @@ static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu, return 0; } +static u32 nested_vmx_max_atomic_switch_msrs(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + u64 vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low, + vmx->nested.msrs.misc_high); + + return (vmx_misc_max_msr(vmx_misc) + 1) * VMX_MISC_MSR_LIST_MULTIPLIER; +} + static int nested_vmx_check_msr_switch(struct kvm_vcpu *vcpu, u32 count, u64 addr) { if (count == 0) return 0; + /* + * Exceeding the limit results in architecturally _undefined_ behavior, + * i.e. KVM is allowed to do literally anything in response to a bad + * limit. Immediately generate a consistency check so that code that + * consumes the count doesn't need to worry about extreme edge cases. + */ + if (count > nested_vmx_max_atomic_switch_msrs(vcpu)) + return -EINVAL; + if (!kvm_vcpu_is_legal_aligned_gpa(vcpu, addr, 16) || !kvm_vcpu_is_legal_gpa(vcpu, (addr + count * sizeof(struct vmx_msr_entry) - 1))) return -EINVAL; @@ -941,15 +965,6 @@ static int nested_vmx_store_msr_check(struct kvm_vcpu *vcpu, return 0; } -static u32 nested_vmx_max_atomic_switch_msrs(struct kvm_vcpu *vcpu) -{ - struct vcpu_vmx *vmx = to_vmx(vcpu); - u64 vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low, - vmx->nested.msrs.misc_high); - - return (vmx_misc_max_msr(vmx_misc) + 1) * VMX_MISC_MSR_LIST_MULTIPLIER; -} - /* * Load guest's/host's msr at nested entry/exit. * return 0 for success, entry index for failure. @@ -966,7 +981,7 @@ static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) u32 max_msr_list_size = nested_vmx_max_atomic_switch_msrs(vcpu); for (i = 0; i < count; i++) { - if (unlikely(i >= max_msr_list_size)) + if (WARN_ON_ONCE(i >= max_msr_list_size)) goto fail; if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e), @@ -1054,7 +1069,7 @@ static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) u32 max_msr_list_size = nested_vmx_max_atomic_switch_msrs(vcpu); for (i = 0; i < count; i++) { - if (unlikely(i >= max_msr_list_size)) + if (WARN_ON_ONCE(i >= max_msr_list_size)) return -EINVAL; if (!read_and_check_msr_entry(vcpu, gpa, i, &e)) @@ -2654,10 +2669,11 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, if (vmx->nested.nested_run_pending && (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) { kvm_set_dr(vcpu, 7, vmcs12->guest_dr7); - vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl); + vmx_guest_debugctl_write(vcpu, vmcs12->guest_ia32_debugctl & + vmx_get_supported_debugctl(vcpu, false)); } else { kvm_set_dr(vcpu, 7, vcpu->arch.dr7); - vmcs_write64(GUEST_IA32_DEBUGCTL, vmx->nested.pre_vmenter_debugctl); + vmx_guest_debugctl_write(vcpu, vmx->nested.pre_vmenter_debugctl); } if (kvm_mpx_supported() && (!vmx->nested.nested_run_pending || !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))) @@ -3147,7 +3163,8 @@ static int nested_vmx_check_guest_state(struct kvm_vcpu *vcpu, return -EINVAL; if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) && - CC(!kvm_dr7_valid(vmcs12->guest_dr7))) + (CC(!kvm_dr7_valid(vmcs12->guest_dr7)) || + CC(!vmx_is_valid_debugctl(vcpu, vmcs12->guest_ia32_debugctl, false)))) return -EINVAL; if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) && @@ -3521,7 +3538,7 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, if (!vmx->nested.nested_run_pending || !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) - vmx->nested.pre_vmenter_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); + vmx->nested.pre_vmenter_debugctl = vmx_guest_debugctl_read(); if (kvm_mpx_supported() && (!vmx->nested.nested_run_pending || !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))) @@ -4521,12 +4538,12 @@ static void copy_vmcs02_to_vmcs12_rare(struct kvm_vcpu *vcpu, cpu = get_cpu(); vmx->loaded_vmcs = &vmx->nested.vmcs02; - vmx_vcpu_load_vmcs(vcpu, cpu, &vmx->vmcs01); + vmx_vcpu_load_vmcs(vcpu, cpu); sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12); vmx->loaded_vmcs = &vmx->vmcs01; - vmx_vcpu_load_vmcs(vcpu, cpu, &vmx->nested.vmcs02); + vmx_vcpu_load_vmcs(vcpu, cpu); put_cpu(); } @@ -4599,6 +4616,12 @@ static void sync_vmcs02_to_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) | (vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE); + /* + * Note! Save DR7, but intentionally don't grab DEBUGCTL from vmcs02. + * Writes to DEBUGCTL that aren't intercepted by L1 are immediately + * propagated to vmcs12 (see vmx_set_msr()), as the value loaded into + * vmcs02 doesn't strictly track vmcs12. + */ if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) vmcs12->guest_dr7 = vcpu->arch.dr7; @@ -4789,7 +4812,7 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, __vmx_set_segment(vcpu, &seg, VCPU_SREG_LDTR); kvm_set_dr(vcpu, 7, 0x400); - vmcs_write64(GUEST_IA32_DEBUGCTL, 0); + vmx_guest_debugctl_write(vcpu, 0); if (nested_vmx_load_msr(vcpu, vmcs12->vm_exit_msr_load_addr, vmcs12->vm_exit_msr_load_count)) @@ -4844,6 +4867,9 @@ static void nested_vmx_restore_host_state(struct kvm_vcpu *vcpu) WARN_ON(kvm_set_dr(vcpu, 7, vmcs_readl(GUEST_DR7))); } + /* Reload DEBUGCTL to ensure vmcs01 has a fresh FREEZE_IN_SMM value. */ + vmx_reload_guest_debugctl(vcpu); + /* * Note that calling vmx_set_{efer,cr0,cr4} is important as they * handle a variety of side effects to KVM's software model. @@ -5021,16 +5047,7 @@ void __nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason, vmx_switch_vmcs(vcpu, &vmx->vmcs01); - /* - * If IBRS is advertised to the vCPU, KVM must flush the indirect - * branch predictors when transitioning from L2 to L1, as L1 expects - * hardware (KVM in this case) to provide separate predictor modes. - * Bare metal isolates VMX root (host) from VMX non-root (guest), but - * doesn't isolate different VMCSs, i.e. in this case, doesn't provide - * separate modes for L2 vs L1. - */ - if (guest_cpu_cap_has(vcpu, X86_FEATURE_SPEC_CTRL)) - indirect_branch_prediction_barrier(); + kvm_nested_vmexit_handle_ibrs(vcpu); /* Update any VMCS fields that might have changed while L2 ran */ vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr); diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index bbf4509f32d0..0b173602821b 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -653,11 +653,11 @@ static void intel_pmu_reset(struct kvm_vcpu *vcpu) */ static void intel_pmu_legacy_freezing_lbrs_on_pmi(struct kvm_vcpu *vcpu) { - u64 data = vmcs_read64(GUEST_IA32_DEBUGCTL); + u64 data = vmx_guest_debugctl_read(); if (data & DEBUGCTLMSR_FREEZE_LBRS_ON_PMI) { data &= ~DEBUGCTLMSR_LBR; - vmcs_write64(GUEST_IA32_DEBUGCTL, data); + vmx_guest_debugctl_write(vcpu, data); } } @@ -730,7 +730,7 @@ void vmx_passthrough_lbr_msrs(struct kvm_vcpu *vcpu) if (!lbr_desc->event) { vmx_disable_lbr_msrs_passthrough(vcpu); - if (vmcs_read64(GUEST_IA32_DEBUGCTL) & DEBUGCTLMSR_LBR) + if (vmx_guest_debugctl_read() & DEBUGCTLMSR_LBR) goto warn; if (test_bit(INTEL_PMC_IDX_FIXED_VLBR, pmu->pmc_in_use)) goto warn; @@ -752,7 +752,7 @@ warn: static void intel_pmu_cleanup(struct kvm_vcpu *vcpu) { - if (!(vmcs_read64(GUEST_IA32_DEBUGCTL) & DEBUGCTLMSR_LBR)) + if (!(vmx_guest_debugctl_read() & DEBUGCTLMSR_LBR)) intel_pmu_release_guest_lbr_event(vcpu); } diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 99d1d599ff8c..4a6d9a17da23 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -2,6 +2,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kvm_host.h> +#include <linux/kvm_irqfd.h> #include <asm/irq_remapping.h> #include <asm/cpu.h> @@ -34,7 +35,7 @@ static DEFINE_PER_CPU(raw_spinlock_t, wakeup_vcpus_on_cpu_lock); #define PI_LOCK_SCHED_OUT SINGLE_DEPTH_NESTING -struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu) +static struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu) { return &(to_vt(vcpu)->pi_desc); } @@ -72,13 +73,10 @@ void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu) /* * If the vCPU wasn't on the wakeup list and wasn't migrated, then the * full update can be skipped as neither the vector nor the destination - * needs to be changed. + * needs to be changed. Clear SN even if there is no assigned device, + * again for simplicity. */ if (pi_desc->nv != POSTED_INTR_WAKEUP_VECTOR && vcpu->cpu == cpu) { - /* - * Clear SN if it was set due to being preempted. Again, do - * this even if there is no assigned device for simplicity. - */ if (pi_test_and_clear_sn(pi_desc)) goto after_clear_sn; return; @@ -148,9 +146,13 @@ after_clear_sn: static bool vmx_can_use_vtd_pi(struct kvm *kvm) { - return irqchip_in_kernel(kvm) && enable_apicv && - kvm_arch_has_assigned_device(kvm) && - irq_remapping_cap(IRQ_POSTING_CAP); + /* + * Note, reading the number of possible bypass IRQs can race with a + * bypass IRQ being attached to the VM. vmx_pi_start_bypass() ensures + * blockng vCPUs will see an elevated count or get KVM_REQ_UNBLOCK. + */ + return irqchip_in_kernel(kvm) && kvm_arch_has_irq_bypass() && + READ_ONCE(kvm->arch.nr_possible_bypass_irqs); } /* @@ -225,17 +227,23 @@ void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) if (!vmx_needs_pi_wakeup(vcpu)) return; - if (kvm_vcpu_is_blocking(vcpu) && + /* + * If the vCPU is blocking with IRQs enabled and ISN'T being preempted, + * enable the wakeup handler so that notification IRQ wakes the vCPU as + * expected. There is no need to enable the wakeup handler if the vCPU + * is preempted between setting its wait state and manually scheduling + * out, as the task is still runnable, i.e. doesn't need a wake event + * from KVM to be scheduled in. + * + * If the wakeup handler isn't being enabled, Suppress Notifications as + * the cost of propagating PIR.IRR to PID.ON is negligible compared to + * the cost of a spurious IRQ, and vCPU put/load is a slow path. + */ + if (!vcpu->preempted && kvm_vcpu_is_blocking(vcpu) && ((is_td_vcpu(vcpu) && tdx_interrupt_allowed(vcpu)) || (!is_td_vcpu(vcpu) && !vmx_interrupt_blocked(vcpu)))) pi_enable_wakeup_handler(vcpu); - - /* - * Set SN when the vCPU is preempted. Note, the vCPU can both be seen - * as blocking and preempted, e.g. if it's preempted between setting - * its wait state and manually scheduling out. - */ - if (vcpu->preempted) + else pi_set_sn(pi_desc); } @@ -264,6 +272,14 @@ void __init pi_init_cpu(int cpu) raw_spin_lock_init(&per_cpu(wakeup_vcpus_on_cpu_lock, cpu)); } +void pi_apicv_pre_state_restore(struct kvm_vcpu *vcpu) +{ + struct pi_desc *pi = vcpu_to_pi_desc(vcpu); + + pi_clear_on(pi); + memset(pi->pir, 0, sizeof(pi->pir)); +} + bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu) { struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); @@ -274,99 +290,30 @@ bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu) /* - * Bail out of the block loop if the VM has an assigned - * device, but the blocking vCPU didn't reconfigure the - * PI.NV to the wakeup vector, i.e. the assigned device - * came along after the initial check in vmx_vcpu_pi_put(). + * Kick all vCPUs when the first possible bypass IRQ is attached to a VM, as + * blocking vCPUs may scheduled out without reconfiguring PID.NV to the wakeup + * vector, i.e. if the bypass IRQ came along after vmx_vcpu_pi_put(). */ -void vmx_pi_start_assignment(struct kvm *kvm) +void vmx_pi_start_bypass(struct kvm *kvm) { - if (!irq_remapping_cap(IRQ_POSTING_CAP)) + if (WARN_ON_ONCE(!vmx_can_use_vtd_pi(kvm))) return; kvm_make_all_cpus_request(kvm, KVM_REQ_UNBLOCK); } -/* - * vmx_pi_update_irte - set IRTE for Posted-Interrupts - * - * @kvm: kvm - * @host_irq: host irq of the interrupt - * @guest_irq: gsi of the interrupt - * @set: set or unset PI - * returns 0 on success, < 0 on failure - */ -int vmx_pi_update_irte(struct kvm *kvm, unsigned int host_irq, - uint32_t guest_irq, bool set) +int vmx_pi_update_irte(struct kvm_kernel_irqfd *irqfd, struct kvm *kvm, + unsigned int host_irq, uint32_t guest_irq, + struct kvm_vcpu *vcpu, u32 vector) { - struct kvm_kernel_irq_routing_entry *e; - struct kvm_irq_routing_table *irq_rt; - bool enable_remapped_mode = true; - struct kvm_lapic_irq irq; - struct kvm_vcpu *vcpu; - struct vcpu_data vcpu_info; - int idx, ret = 0; - - if (!vmx_can_use_vtd_pi(kvm)) - return 0; - - idx = srcu_read_lock(&kvm->irq_srcu); - irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); - if (guest_irq >= irq_rt->nr_rt_entries || - hlist_empty(&irq_rt->map[guest_irq])) { - pr_warn_once("no route for guest_irq %u/%u (broken user space?)\n", - guest_irq, irq_rt->nr_rt_entries); - goto out; - } - - hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) { - if (e->type != KVM_IRQ_ROUTING_MSI) - continue; - /* - * VT-d PI cannot support posting multicast/broadcast - * interrupts to a vCPU, we still use interrupt remapping - * for these kind of interrupts. - * - * For lowest-priority interrupts, we only support - * those with single CPU as the destination, e.g. user - * configures the interrupts via /proc/irq or uses - * irqbalance to make the interrupts single-CPU. - * - * We will support full lowest-priority interrupt later. - * - * In addition, we can only inject generic interrupts using - * the PI mechanism, refuse to route others through it. - */ - - kvm_set_msi_irq(kvm, e, &irq); - if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) || - !kvm_irq_is_postable(&irq)) - continue; - - vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu)); - vcpu_info.vector = irq.vector; - - trace_kvm_pi_irte_update(host_irq, vcpu->vcpu_id, e->gsi, - vcpu_info.vector, vcpu_info.pi_desc_addr, set); - - if (!set) - continue; - - enable_remapped_mode = false; - - ret = irq_set_vcpu_affinity(host_irq, &vcpu_info); - if (ret < 0) { - printk(KERN_INFO "%s: failed to update PI IRTE\n", - __func__); - goto out; - } + if (vcpu) { + struct intel_iommu_pi_data pi_data = { + .pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu)), + .vector = vector, + }; + + return irq_set_vcpu_affinity(host_irq, &pi_data); + } else { + return irq_set_vcpu_affinity(host_irq, NULL); } - - if (enable_remapped_mode) - ret = irq_set_vcpu_affinity(host_irq, NULL); - - ret = 0; -out: - srcu_read_unlock(&kvm->irq_srcu, idx); - return ret; } diff --git a/arch/x86/kvm/vmx/posted_intr.h b/arch/x86/kvm/vmx/posted_intr.h index 68605ca7ef68..a4af39948cf0 100644 --- a/arch/x86/kvm/vmx/posted_intr.h +++ b/arch/x86/kvm/vmx/posted_intr.h @@ -3,24 +3,27 @@ #define __KVM_X86_VMX_POSTED_INTR_H #include <linux/bitmap.h> -#include <asm/posted_intr.h> +#include <linux/find.h> +#include <linux/kvm_host.h> -struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu); +#include <asm/posted_intr.h> void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu); void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu); void pi_wakeup_handler(void); void __init pi_init_cpu(int cpu); +void pi_apicv_pre_state_restore(struct kvm_vcpu *vcpu); bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu); -int vmx_pi_update_irte(struct kvm *kvm, unsigned int host_irq, - uint32_t guest_irq, bool set); -void vmx_pi_start_assignment(struct kvm *kvm); +int vmx_pi_update_irte(struct kvm_kernel_irqfd *irqfd, struct kvm *kvm, + unsigned int host_irq, uint32_t guest_irq, + struct kvm_vcpu *vcpu, u32 vector); +void vmx_pi_start_bypass(struct kvm *kvm); static inline int pi_find_highest_vector(struct pi_desc *pi_desc) { int vec; - vec = find_last_bit((unsigned long *)pi_desc->pir, 256); + vec = find_last_bit(pi_desc->pir, 256); return vec < 256 ? vec : -1; } diff --git a/arch/x86/kvm/vmx/run_flags.h b/arch/x86/kvm/vmx/run_flags.h index 6a9bfdfbb6e5..2f20fb170def 100644 --- a/arch/x86/kvm/vmx/run_flags.h +++ b/arch/x86/kvm/vmx/run_flags.h @@ -2,10 +2,12 @@ #ifndef __KVM_X86_VMX_RUN_FLAGS_H #define __KVM_X86_VMX_RUN_FLAGS_H -#define VMX_RUN_VMRESUME_SHIFT 0 -#define VMX_RUN_SAVE_SPEC_CTRL_SHIFT 1 +#define VMX_RUN_VMRESUME_SHIFT 0 +#define VMX_RUN_SAVE_SPEC_CTRL_SHIFT 1 +#define VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO_SHIFT 2 -#define VMX_RUN_VMRESUME BIT(VMX_RUN_VMRESUME_SHIFT) -#define VMX_RUN_SAVE_SPEC_CTRL BIT(VMX_RUN_SAVE_SPEC_CTRL_SHIFT) +#define VMX_RUN_VMRESUME BIT(VMX_RUN_VMRESUME_SHIFT) +#define VMX_RUN_SAVE_SPEC_CTRL BIT(VMX_RUN_SAVE_SPEC_CTRL_SHIFT) +#define VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO BIT(VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO_SHIFT) #endif /* __KVM_X86_VMX_RUN_FLAGS_H */ diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index b952bc673271..66744f5768c8 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -173,6 +173,8 @@ static void td_init_cpuid_entry2(struct kvm_cpuid_entry2 *entry, unsigned char i tdx_clear_unsupported_cpuid(entry); } +#define TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT BIT(1) + static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, struct kvm_tdx_capabilities *caps) { @@ -188,6 +190,9 @@ static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, caps->cpuid.nent = td_conf->num_cpuid_config; + caps->user_tdvmcallinfo_1_r11 = + TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT; + for (i = 0; i < td_conf->num_cpuid_config; i++) td_init_cpuid_entry2(&caps->cpuid.entries[i], i); @@ -738,7 +743,7 @@ bool tdx_interrupt_allowed(struct kvm_vcpu *vcpu) !to_tdx(vcpu)->vp_enter_args.r12; } -bool tdx_protected_apic_has_interrupt(struct kvm_vcpu *vcpu) +static bool tdx_protected_apic_has_interrupt(struct kvm_vcpu *vcpu) { u64 vcpu_state_details; @@ -778,8 +783,6 @@ void tdx_prepare_switch_to_guest(struct kvm_vcpu *vcpu) else vt->msr_host_kernel_gs_base = read_msr(MSR_KERNEL_GS_BASE); - vt->host_debugctlmsr = get_debugctlmsr(); - vt->guest_state_loaded = true; } @@ -1020,20 +1023,20 @@ static void tdx_load_host_xsave_state(struct kvm_vcpu *vcpu) DEBUGCTLMSR_FREEZE_PERFMON_ON_PMI | \ DEBUGCTLMSR_FREEZE_IN_SMM) -fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) +fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, u64 run_flags) { struct vcpu_tdx *tdx = to_tdx(vcpu); struct vcpu_vt *vt = to_vt(vcpu); /* - * force_immediate_exit requires vCPU entering for events injection with - * an immediately exit followed. But The TDX module doesn't guarantee - * entry, it's already possible for KVM to _think_ it completely entry - * to the guest without actually having done so. - * Since KVM never needs to force an immediate exit for TDX, and can't - * do direct injection, just warn on force_immediate_exit. + * WARN if KVM wants to force an immediate exit, as the TDX module does + * not guarantee entry into the guest, i.e. it's possible for KVM to + * _think_ it completed entry to the guest and forced an immediate exit + * without actually having done so. Luckily, KVM never needs to force + * an immediate exit for TDX (KVM can't do direct event injection, so + * just WARN and continue on. */ - WARN_ON_ONCE(force_immediate_exit); + WARN_ON_ONCE(run_flags); /* * Wait until retry of SEPT-zap-related SEAMCALL completes before @@ -1043,7 +1046,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) if (unlikely(READ_ONCE(to_kvm_tdx(vcpu->kvm)->wait_for_sept_zap))) return EXIT_FASTPATH_EXIT_HANDLED; - trace_kvm_entry(vcpu, force_immediate_exit); + trace_kvm_entry(vcpu, run_flags & KVM_RUN_FORCE_IMMEDIATE_EXIT); if (pi_test_on(&vt->pi_desc)) { apic->send_IPI_self(POSTED_INTR_VECTOR); @@ -1055,8 +1058,8 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) tdx_vcpu_enter_exit(vcpu); - if (vt->host_debugctlmsr & ~TDX_DEBUGCTL_PRESERVED) - update_debugctlmsr(vt->host_debugctlmsr); + if (vcpu->arch.host_debugctl & ~TDX_DEBUGCTL_PRESERVED) + update_debugctlmsr(vcpu->arch.host_debugctl); tdx_load_host_xsave_state(vcpu); tdx->guest_entered = true; @@ -1212,11 +1215,13 @@ static int tdx_map_gpa(struct kvm_vcpu *vcpu) /* * Converting TDVMCALL_MAP_GPA to KVM_HC_MAP_GPA_RANGE requires * userspace to enable KVM_CAP_EXIT_HYPERCALL with KVM_HC_MAP_GPA_RANGE - * bit set. If not, the error code is not defined in GHCI for TDX, use - * TDVMCALL_STATUS_INVALID_OPERAND for this case. + * bit set. This is a base call so it should always be supported, but + * KVM has no way to ensure that userspace implements the GHCI correctly. + * So if KVM_HC_MAP_GPA_RANGE does not cause a VMEXIT, return an error + * to the guest. */ if (!user_exit_on_hypercall(vcpu->kvm, KVM_HC_MAP_GPA_RANGE)) { - ret = TDVMCALL_STATUS_INVALID_OPERAND; + ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED; goto error; } @@ -1449,20 +1454,106 @@ error: return 1; } +static int tdx_complete_get_td_vm_call_info(struct kvm_vcpu *vcpu) +{ + struct vcpu_tdx *tdx = to_tdx(vcpu); + + tdvmcall_set_return_code(vcpu, vcpu->run->tdx.get_tdvmcall_info.ret); + + /* + * For now, there is no TDVMCALL beyond GHCI base API supported by KVM + * directly without the support from userspace, just set the value + * returned from userspace. + */ + tdx->vp_enter_args.r11 = vcpu->run->tdx.get_tdvmcall_info.r11; + tdx->vp_enter_args.r12 = vcpu->run->tdx.get_tdvmcall_info.r12; + tdx->vp_enter_args.r13 = vcpu->run->tdx.get_tdvmcall_info.r13; + tdx->vp_enter_args.r14 = vcpu->run->tdx.get_tdvmcall_info.r14; + + return 1; +} + static int tdx_get_td_vm_call_info(struct kvm_vcpu *vcpu) { struct vcpu_tdx *tdx = to_tdx(vcpu); - if (tdx->vp_enter_args.r12) - tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); - else { + switch (tdx->vp_enter_args.r12) { + case 0: tdx->vp_enter_args.r11 = 0; + tdx->vp_enter_args.r12 = 0; tdx->vp_enter_args.r13 = 0; tdx->vp_enter_args.r14 = 0; + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_SUCCESS); + return 1; + case 1: + vcpu->run->tdx.get_tdvmcall_info.leaf = tdx->vp_enter_args.r12; + vcpu->run->exit_reason = KVM_EXIT_TDX; + vcpu->run->tdx.flags = 0; + vcpu->run->tdx.nr = TDVMCALL_GET_TD_VM_CALL_INFO; + vcpu->run->tdx.get_tdvmcall_info.ret = TDVMCALL_STATUS_SUCCESS; + vcpu->run->tdx.get_tdvmcall_info.r11 = 0; + vcpu->run->tdx.get_tdvmcall_info.r12 = 0; + vcpu->run->tdx.get_tdvmcall_info.r13 = 0; + vcpu->run->tdx.get_tdvmcall_info.r14 = 0; + vcpu->arch.complete_userspace_io = tdx_complete_get_td_vm_call_info; + return 0; + default: + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); + return 1; } +} + +static int tdx_complete_simple(struct kvm_vcpu *vcpu) +{ + tdvmcall_set_return_code(vcpu, vcpu->run->tdx.unknown.ret); return 1; } +static int tdx_get_quote(struct kvm_vcpu *vcpu) +{ + struct vcpu_tdx *tdx = to_tdx(vcpu); + u64 gpa = tdx->vp_enter_args.r12; + u64 size = tdx->vp_enter_args.r13; + + /* The gpa of buffer must have shared bit set. */ + if (vt_is_tdx_private_gpa(vcpu->kvm, gpa)) { + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); + return 1; + } + + vcpu->run->exit_reason = KVM_EXIT_TDX; + vcpu->run->tdx.flags = 0; + vcpu->run->tdx.nr = TDVMCALL_GET_QUOTE; + vcpu->run->tdx.get_quote.ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED; + vcpu->run->tdx.get_quote.gpa = gpa & ~gfn_to_gpa(kvm_gfn_direct_bits(tdx->vcpu.kvm)); + vcpu->run->tdx.get_quote.size = size; + + vcpu->arch.complete_userspace_io = tdx_complete_simple; + + return 0; +} + +static int tdx_setup_event_notify_interrupt(struct kvm_vcpu *vcpu) +{ + struct vcpu_tdx *tdx = to_tdx(vcpu); + u64 vector = tdx->vp_enter_args.r12; + + if (vector < 32 || vector > 255) { + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); + return 1; + } + + vcpu->run->exit_reason = KVM_EXIT_TDX; + vcpu->run->tdx.flags = 0; + vcpu->run->tdx.nr = TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT; + vcpu->run->tdx.setup_event_notify.ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED; + vcpu->run->tdx.setup_event_notify.vector = vector; + + vcpu->arch.complete_userspace_io = tdx_complete_simple; + + return 0; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { switch (tdvmcall_leaf(vcpu)) { @@ -1472,11 +1563,15 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_report_fatal_error(vcpu); case TDVMCALL_GET_TD_VM_CALL_INFO: return tdx_get_td_vm_call_info(vcpu); + case TDVMCALL_GET_QUOTE: + return tdx_get_quote(vcpu); + case TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: + return tdx_setup_event_notify_interrupt(vcpu); default: break; } - tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED); return 1; } @@ -1543,8 +1638,8 @@ static int tdx_mem_page_record_premap_cnt(struct kvm *kvm, gfn_t gfn, return 0; } -int tdx_sept_set_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, kvm_pfn_t pfn) +static int tdx_sept_set_private_spte(struct kvm *kvm, gfn_t gfn, + enum pg_level level, kvm_pfn_t pfn) { struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm); struct page *page = pfn_to_page(pfn); @@ -1624,8 +1719,8 @@ static int tdx_sept_drop_private_spte(struct kvm *kvm, gfn_t gfn, return 0; } -int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, void *private_spt) +static int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn, + enum pg_level level, void *private_spt) { int tdx_level = pg_level_to_tdx_sept_level(level); gpa_t gpa = gfn_to_gpa(gfn); @@ -1760,8 +1855,8 @@ static void tdx_track(struct kvm *kvm) kvm_make_all_cpus_request(kvm, KVM_REQ_OUTSIDE_GUEST_MODE); } -int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, void *private_spt) +static int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, + enum pg_level level, void *private_spt) { struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm); @@ -1783,8 +1878,8 @@ int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, return tdx_reclaim_page(virt_to_page(private_spt)); } -int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, kvm_pfn_t pfn) +static int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, + enum pg_level level, kvm_pfn_t pfn) { struct page *page = pfn_to_page(pfn); int ret; @@ -2172,25 +2267,26 @@ static int tdx_get_capabilities(struct kvm_tdx_cmd *cmd) const struct tdx_sys_info_td_conf *td_conf = &tdx_sysinfo->td_conf; struct kvm_tdx_capabilities __user *user_caps; struct kvm_tdx_capabilities *caps = NULL; + u32 nr_user_entries; int ret = 0; /* flags is reserved for future use */ if (cmd->flags) return -EINVAL; - caps = kmalloc(sizeof(*caps) + + caps = kzalloc(sizeof(*caps) + sizeof(struct kvm_cpuid_entry2) * td_conf->num_cpuid_config, GFP_KERNEL); if (!caps) return -ENOMEM; user_caps = u64_to_user_ptr(cmd->data); - if (copy_from_user(caps, user_caps, sizeof(*caps))) { + if (get_user(nr_user_entries, &user_caps->cpuid.nent)) { ret = -EFAULT; goto out; } - if (caps->cpuid.nent < td_conf->num_cpuid_config) { + if (nr_user_entries < td_conf->num_cpuid_config) { ret = -E2BIG; goto out; } @@ -3507,10 +3603,14 @@ int __init tdx_bringup(void) r = __tdx_bringup(); if (r) { /* - * Disable TDX only but don't fail to load module if - * the TDX module could not be loaded. No need to print - * message saying "module is not loaded" because it was - * printed when the first SEAMCALL failed. + * Disable TDX only but don't fail to load module if the TDX + * module could not be loaded. No need to print message saying + * "module is not loaded" because it was printed when the first + * SEAMCALL failed. Don't bother unwinding the S-EPT hooks or + * vm_size, as kvm_x86_ops have already been finalized (and are + * intentionally not exported). The S-EPT code is unreachable, + * and allocating a few more bytes per VM in a should-be-rare + * failure scenario is a non-issue. */ if (r == -ENODEV) goto success_disable_tdx; @@ -3524,3 +3624,20 @@ success_disable_tdx: enable_tdx = 0; return 0; } + +void __init tdx_hardware_setup(void) +{ + KVM_SANITY_CHECK_VM_STRUCT_SIZE(kvm_tdx); + + /* + * Note, if the TDX module can't be loaded, KVM TDX support will be + * disabled but KVM will continue loading (see tdx_bringup()). + */ + vt_x86_ops.vm_size = max_t(unsigned int, vt_x86_ops.vm_size, sizeof(struct kvm_tdx)); + + vt_x86_ops.link_external_spt = tdx_sept_link_private_spt; + vt_x86_ops.set_external_spte = tdx_sept_set_private_spte; + vt_x86_ops.free_external_spt = tdx_sept_free_private_spt; + vt_x86_ops.remove_external_spte = tdx_sept_remove_private_spte; + vt_x86_ops.protected_apic_has_interrupt = tdx_protected_apic_has_interrupt; +} diff --git a/arch/x86/kvm/vmx/tdx.h b/arch/x86/kvm/vmx/tdx.h index 51f98443e8a2..ca39a9391db1 100644 --- a/arch/x86/kvm/vmx/tdx.h +++ b/arch/x86/kvm/vmx/tdx.h @@ -8,6 +8,7 @@ #ifdef CONFIG_KVM_INTEL_TDX #include "common.h" +void tdx_hardware_setup(void); int tdx_bringup(void); void tdx_cleanup(void); diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S index f6986dee6f8c..0a6cf5bff2aa 100644 --- a/arch/x86/kvm/vmx/vmenter.S +++ b/arch/x86/kvm/vmx/vmenter.S @@ -59,8 +59,7 @@ * without the explicit restore, thinks the stack is getting walloped. * Using an unwind hint is problematic due to x86-64's dynamic alignment. */ - mov %_ASM_BP, %_ASM_SP - pop %_ASM_BP + leave RET .endm diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index b12414108cbf..aa157fe5b7b3 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -75,6 +75,8 @@ #include "vmx_onhyperv.h" #include "posted_intr.h" +#include "mmu/spte.h" + MODULE_AUTHOR("Qumranet"); MODULE_DESCRIPTION("KVM support for VMX (Intel VT-x) extensions"); MODULE_LICENSE("GPL"); @@ -113,10 +115,10 @@ static bool __read_mostly fasteoi = 1; module_param(fasteoi, bool, 0444); module_param(enable_apicv, bool, 0444); - -bool __read_mostly enable_ipiv = true; module_param(enable_ipiv, bool, 0444); +module_param(enable_device_posted_irqs, bool, 0444); + /* * If nested=1, nested virtualization is supported, i.e., guests may use * VMX and be a hypervisor for its own guests. If nested=0, guests may not @@ -166,31 +168,6 @@ module_param(allow_smaller_maxphyaddr, bool, S_IRUGO); RTIT_STATUS_BYTECNT)) /* - * List of MSRs that can be directly passed to the guest. - * In addition to these x2apic, PT and LBR MSRs are handled specially. - */ -static u32 vmx_possible_passthrough_msrs[MAX_POSSIBLE_PASSTHROUGH_MSRS] = { - MSR_IA32_SPEC_CTRL, - MSR_IA32_PRED_CMD, - MSR_IA32_FLUSH_CMD, - MSR_IA32_TSC, -#ifdef CONFIG_X86_64 - MSR_FS_BASE, - MSR_GS_BASE, - MSR_KERNEL_GS_BASE, - MSR_IA32_XFD, - MSR_IA32_XFD_ERR, -#endif - MSR_IA32_SYSENTER_CS, - MSR_IA32_SYSENTER_ESP, - MSR_IA32_SYSENTER_EIP, - MSR_CORE_C1_RES, - MSR_CORE_C3_RESIDENCY, - MSR_CORE_C6_RESIDENCY, - MSR_CORE_C7_RESIDENCY, -}; - -/* * These 2 parameters are used to config the controls for Pause-Loop Exiting: * ple_gap: upper bound on the amount of time between two successive * executions of PAUSE in a loop. Also indicate if ple enabled. @@ -672,40 +649,6 @@ static inline bool cpu_need_virtualize_apic_accesses(struct kvm_vcpu *vcpu) return flexpriority_enabled && lapic_in_kernel(vcpu); } -static int vmx_get_passthrough_msr_slot(u32 msr) -{ - int i; - - switch (msr) { - case 0x800 ... 0x8ff: - /* x2APIC MSRs. These are handled in vmx_update_msr_bitmap_x2apic() */ - return -ENOENT; - case MSR_IA32_RTIT_STATUS: - case MSR_IA32_RTIT_OUTPUT_BASE: - case MSR_IA32_RTIT_OUTPUT_MASK: - case MSR_IA32_RTIT_CR3_MATCH: - case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: - /* PT MSRs. These are handled in pt_update_intercept_for_msr() */ - case MSR_LBR_SELECT: - case MSR_LBR_TOS: - case MSR_LBR_INFO_0 ... MSR_LBR_INFO_0 + 31: - case MSR_LBR_NHM_FROM ... MSR_LBR_NHM_FROM + 31: - case MSR_LBR_NHM_TO ... MSR_LBR_NHM_TO + 31: - case MSR_LBR_CORE_FROM ... MSR_LBR_CORE_FROM + 8: - case MSR_LBR_CORE_TO ... MSR_LBR_CORE_TO + 8: - /* LBR MSRs. These are handled in vmx_update_intercept_for_lbr_msrs() */ - return -ENOENT; - } - - for (i = 0; i < ARRAY_SIZE(vmx_possible_passthrough_msrs); i++) { - if (vmx_possible_passthrough_msrs[i] == msr) - return i; - } - - WARN(1, "Invalid MSR %x, please adapt vmx_possible_passthrough_msrs[]", msr); - return -ENOENT; -} - struct vmx_uret_msr *vmx_find_uret_msr(struct vcpu_vmx *vmx, u32 msr) { int i; @@ -772,8 +715,11 @@ void vmx_emergency_disable_virtualization_cpu(void) return; list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), - loaded_vmcss_on_cpu_link) + loaded_vmcss_on_cpu_link) { vmcs_clear(v->vmcs); + if (v->shadow_vmcs) + vmcs_clear(v->shadow_vmcs); + } kvm_cpu_vmxoff(); } @@ -958,6 +904,10 @@ unsigned int __vmx_vcpu_run_flags(struct vcpu_vmx *vmx) if (!msr_write_intercepted(vmx, MSR_IA32_SPEC_CTRL)) flags |= VMX_RUN_SAVE_SPEC_CTRL; + if (static_branch_unlikely(&cpu_buf_vm_clear) && + kvm_vcpu_can_access_host_mmio(&vmx->vcpu)) + flags |= VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO; + return flags; } @@ -1445,8 +1395,7 @@ static void shrink_ple_window(struct kvm_vcpu *vcpu) } } -void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, - struct loaded_vmcs *buddy) +void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); bool already_loaded = vmx->loaded_vmcs->cpu == cpu; @@ -1473,17 +1422,6 @@ void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, if (prev != vmx->loaded_vmcs->vmcs) { per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs; vmcs_load(vmx->loaded_vmcs->vmcs); - - /* - * No indirect branch prediction barrier needed when switching - * the active VMCS within a vCPU, unless IBRS is advertised to - * the vCPU. To minimize the number of IBPBs executed, KVM - * performs IBPB on nested VM-Exit (a single nested transition - * may switch the active VMCS multiple times). - */ - if (static_branch_likely(&switch_vcpu_ibpb) && - (!buddy || WARN_ON_ONCE(buddy->vmcs != prev))) - indirect_branch_prediction_barrier(); } if (!already_loaded) { @@ -1522,7 +1460,7 @@ void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) if (vcpu->scheduled_out && !kvm_pause_in_guest(vcpu->kvm)) shrink_ple_window(vcpu); - vmx_vcpu_load_vmcs(vcpu, cpu, NULL); + vmx_vcpu_load_vmcs(vcpu, cpu); vmx_vcpu_pi_load(vcpu, cpu); } @@ -2156,7 +2094,7 @@ int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) msr_info->data = vmx->pt_desc.guest.addr_a[index / 2]; break; case MSR_IA32_DEBUGCTLMSR: - msr_info->data = vmcs_read64(GUEST_IA32_DEBUGCTL); + msr_info->data = vmx_guest_debugctl_read(); break; default: find_uret_msr: @@ -2181,7 +2119,7 @@ static u64 nested_vmx_truncate_sysenter_addr(struct kvm_vcpu *vcpu, return (unsigned long)data; } -static u64 vmx_get_supported_debugctl(struct kvm_vcpu *vcpu, bool host_initiated) +u64 vmx_get_supported_debugctl(struct kvm_vcpu *vcpu, bool host_initiated) { u64 debugctl = 0; @@ -2193,9 +2131,25 @@ static u64 vmx_get_supported_debugctl(struct kvm_vcpu *vcpu, bool host_initiated (host_initiated || intel_pmu_lbr_is_enabled(vcpu))) debugctl |= DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI; + if (boot_cpu_has(X86_FEATURE_RTM) && + (host_initiated || guest_cpu_cap_has(vcpu, X86_FEATURE_RTM))) + debugctl |= DEBUGCTLMSR_RTM_DEBUG; + return debugctl; } +bool vmx_is_valid_debugctl(struct kvm_vcpu *vcpu, u64 data, bool host_initiated) +{ + u64 invalid; + + invalid = data & ~vmx_get_supported_debugctl(vcpu, host_initiated); + if (invalid & (DEBUGCTLMSR_BTF | DEBUGCTLMSR_LBR)) { + kvm_pr_unimpl_wrmsr(vcpu, MSR_IA32_DEBUGCTLMSR, data); + invalid &= ~(DEBUGCTLMSR_BTF | DEBUGCTLMSR_LBR); + } + return !invalid; +} + /* * Writes msr value into the appropriate "register". * Returns 0 on success, non-0 otherwise. @@ -2264,29 +2218,22 @@ int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) } vmcs_writel(GUEST_SYSENTER_ESP, data); break; - case MSR_IA32_DEBUGCTLMSR: { - u64 invalid; - - invalid = data & ~vmx_get_supported_debugctl(vcpu, msr_info->host_initiated); - if (invalid & (DEBUGCTLMSR_BTF|DEBUGCTLMSR_LBR)) { - kvm_pr_unimpl_wrmsr(vcpu, msr_index, data); - data &= ~(DEBUGCTLMSR_BTF|DEBUGCTLMSR_LBR); - invalid &= ~(DEBUGCTLMSR_BTF|DEBUGCTLMSR_LBR); - } - - if (invalid) + case MSR_IA32_DEBUGCTLMSR: + if (!vmx_is_valid_debugctl(vcpu, data, msr_info->host_initiated)) return 1; + data &= vmx_get_supported_debugctl(vcpu, msr_info->host_initiated); + if (is_guest_mode(vcpu) && get_vmcs12(vcpu)->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) get_vmcs12(vcpu)->guest_ia32_debugctl = data; - vmcs_write64(GUEST_IA32_DEBUGCTL, data); + vmx_guest_debugctl_write(vcpu, data); + if (intel_pmu_lbr_is_enabled(vcpu) && !to_vmx(vcpu)->lbr_desc.event && (data & DEBUGCTLMSR_LBR)) intel_pmu_create_guest_lbr_event(vcpu); return 0; - } case MSR_IA32_BNDCFGS: if (!kvm_mpx_supported() || (!msr_info->host_initiated && @@ -4020,76 +3967,29 @@ static void vmx_msr_bitmap_l01_changed(struct vcpu_vmx *vmx) vmx->nested.force_msr_bitmap_recalc = true; } -void vmx_disable_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type) +void vmx_set_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type, bool set) { struct vcpu_vmx *vmx = to_vmx(vcpu); unsigned long *msr_bitmap = vmx->vmcs01.msr_bitmap; - int idx; if (!cpu_has_vmx_msr_bitmap()) return; vmx_msr_bitmap_l01_changed(vmx); - /* - * Mark the desired intercept state in shadow bitmap, this is needed - * for resync when the MSR filters change. - */ - idx = vmx_get_passthrough_msr_slot(msr); - if (idx >= 0) { - if (type & MSR_TYPE_R) - clear_bit(idx, vmx->shadow_msr_intercept.read); - if (type & MSR_TYPE_W) - clear_bit(idx, vmx->shadow_msr_intercept.write); - } - - if ((type & MSR_TYPE_R) && - !kvm_msr_allowed(vcpu, msr, KVM_MSR_FILTER_READ)) { - vmx_set_msr_bitmap_read(msr_bitmap, msr); - type &= ~MSR_TYPE_R; - } - - if ((type & MSR_TYPE_W) && - !kvm_msr_allowed(vcpu, msr, KVM_MSR_FILTER_WRITE)) { - vmx_set_msr_bitmap_write(msr_bitmap, msr); - type &= ~MSR_TYPE_W; + if (type & MSR_TYPE_R) { + if (!set && kvm_msr_allowed(vcpu, msr, KVM_MSR_FILTER_READ)) + vmx_clear_msr_bitmap_read(msr_bitmap, msr); + else + vmx_set_msr_bitmap_read(msr_bitmap, msr); } - if (type & MSR_TYPE_R) - vmx_clear_msr_bitmap_read(msr_bitmap, msr); - - if (type & MSR_TYPE_W) - vmx_clear_msr_bitmap_write(msr_bitmap, msr); -} - -void vmx_enable_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type) -{ - struct vcpu_vmx *vmx = to_vmx(vcpu); - unsigned long *msr_bitmap = vmx->vmcs01.msr_bitmap; - int idx; - - if (!cpu_has_vmx_msr_bitmap()) - return; - - vmx_msr_bitmap_l01_changed(vmx); - - /* - * Mark the desired intercept state in shadow bitmap, this is needed - * for resync when the MSR filter changes. - */ - idx = vmx_get_passthrough_msr_slot(msr); - if (idx >= 0) { - if (type & MSR_TYPE_R) - set_bit(idx, vmx->shadow_msr_intercept.read); - if (type & MSR_TYPE_W) - set_bit(idx, vmx->shadow_msr_intercept.write); + if (type & MSR_TYPE_W) { + if (!set && kvm_msr_allowed(vcpu, msr, KVM_MSR_FILTER_WRITE)) + vmx_clear_msr_bitmap_write(msr_bitmap, msr); + else + vmx_set_msr_bitmap_write(msr_bitmap, msr); } - - if (type & MSR_TYPE_R) - vmx_set_msr_bitmap_read(msr_bitmap, msr); - - if (type & MSR_TYPE_W) - vmx_set_msr_bitmap_write(msr_bitmap, msr); } static void vmx_update_msr_bitmap_x2apic(struct kvm_vcpu *vcpu) @@ -4168,35 +4068,57 @@ void pt_update_intercept_for_msr(struct kvm_vcpu *vcpu) } } -void vmx_msr_filter_changed(struct kvm_vcpu *vcpu) +void vmx_recalc_msr_intercepts(struct kvm_vcpu *vcpu) { - struct vcpu_vmx *vmx = to_vmx(vcpu); - u32 i; - if (!cpu_has_vmx_msr_bitmap()) return; - /* - * Redo intercept permissions for MSRs that KVM is passing through to - * the guest. Disabling interception will check the new MSR filter and - * ensure that KVM enables interception if usersepace wants to filter - * the MSR. MSRs that KVM is already intercepting don't need to be - * refreshed since KVM is going to intercept them regardless of what - * userspace wants. - */ - for (i = 0; i < ARRAY_SIZE(vmx_possible_passthrough_msrs); i++) { - u32 msr = vmx_possible_passthrough_msrs[i]; - - if (!test_bit(i, vmx->shadow_msr_intercept.read)) - vmx_disable_intercept_for_msr(vcpu, msr, MSR_TYPE_R); - - if (!test_bit(i, vmx->shadow_msr_intercept.write)) - vmx_disable_intercept_for_msr(vcpu, msr, MSR_TYPE_W); + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_TSC, MSR_TYPE_R); +#ifdef CONFIG_X86_64 + vmx_disable_intercept_for_msr(vcpu, MSR_FS_BASE, MSR_TYPE_RW); + vmx_disable_intercept_for_msr(vcpu, MSR_GS_BASE, MSR_TYPE_RW); + vmx_disable_intercept_for_msr(vcpu, MSR_KERNEL_GS_BASE, MSR_TYPE_RW); +#endif + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_CS, MSR_TYPE_RW); + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_ESP, MSR_TYPE_RW); + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_EIP, MSR_TYPE_RW); + if (kvm_cstate_in_guest(vcpu->kvm)) { + vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C1_RES, MSR_TYPE_R); + vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C3_RESIDENCY, MSR_TYPE_R); + vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C6_RESIDENCY, MSR_TYPE_R); + vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C7_RESIDENCY, MSR_TYPE_R); + } + if (kvm_aperfmperf_in_guest(vcpu->kvm)) { + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_APERF, MSR_TYPE_R); + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_MPERF, MSR_TYPE_R); } /* PT MSRs can be passed through iff PT is exposed to the guest. */ if (vmx_pt_mode_is_host_guest()) pt_update_intercept_for_msr(vcpu); + + if (vcpu->arch.xfd_no_write_intercept) + vmx_disable_intercept_for_msr(vcpu, MSR_IA32_XFD, MSR_TYPE_RW); + + vmx_set_intercept_for_msr(vcpu, MSR_IA32_SPEC_CTRL, MSR_TYPE_RW, + !to_vmx(vcpu)->spec_ctrl); + + if (kvm_cpu_cap_has(X86_FEATURE_XFD)) + vmx_set_intercept_for_msr(vcpu, MSR_IA32_XFD_ERR, MSR_TYPE_R, + !guest_cpu_cap_has(vcpu, X86_FEATURE_XFD)); + + if (cpu_feature_enabled(X86_FEATURE_IBPB)) + vmx_set_intercept_for_msr(vcpu, MSR_IA32_PRED_CMD, MSR_TYPE_W, + !guest_has_pred_cmd_msr(vcpu)); + + if (cpu_feature_enabled(X86_FEATURE_FLUSH_L1D)) + vmx_set_intercept_for_msr(vcpu, MSR_IA32_FLUSH_CMD, MSR_TYPE_W, + !guest_cpu_cap_has(vcpu, X86_FEATURE_FLUSH_L1D)); + + /* + * x2APIC and LBR MSR intercepts are modified on-demand and cannot be + * filtered by userspace. + */ } static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu, @@ -4797,7 +4719,8 @@ static void init_vmcs(struct vcpu_vmx *vmx) vmcs_write32(GUEST_SYSENTER_CS, 0); vmcs_writel(GUEST_SYSENTER_ESP, 0); vmcs_writel(GUEST_SYSENTER_EIP, 0); - vmcs_write64(GUEST_IA32_DEBUGCTL, 0); + + vmx_guest_debugctl_write(&vmx->vcpu, 0); if (cpu_has_vmx_tpr_shadow()) { vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); @@ -5613,12 +5536,6 @@ void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu) set_debugreg(DR6_RESERVED, 6); } -void vmx_set_dr6(struct kvm_vcpu *vcpu, unsigned long val) -{ - lockdep_assert_irqs_disabled(); - set_debugreg(vcpu->arch.dr6, 6); -} - void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) { vmcs_writel(GUEST_DR7, val); @@ -7297,8 +7214,8 @@ static noinstr void vmx_vcpu_enter_exit(struct kvm_vcpu *vcpu, if (static_branch_unlikely(&vmx_l1d_should_flush)) vmx_l1d_flush(vcpu); else if (static_branch_unlikely(&cpu_buf_vm_clear) && - kvm_arch_has_assigned_device(vcpu->kvm)) - mds_clear_cpu_buffers(); + (flags & VMX_RUN_CLEAR_CPU_BUFFERS_FOR_MMIO)) + x86_clear_cpu_buffers(); vmx_disable_fb_clear(vmx); @@ -7330,8 +7247,9 @@ out: guest_state_exit_irqoff(); } -fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) +fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, u64 run_flags) { + bool force_immediate_exit = run_flags & KVM_RUN_FORCE_IMMEDIATE_EXIT; struct vcpu_vmx *vmx = to_vmx(vcpu); unsigned long cr3, cr4; @@ -7376,6 +7294,12 @@ fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); vcpu->arch.regs_dirty = 0; + if (run_flags & KVM_RUN_LOAD_GUEST_DR6) + set_debugreg(vcpu->arch.dr6, 6); + + if (run_flags & KVM_RUN_LOAD_DEBUGCTL) + vmx_reload_guest_debugctl(vcpu); + /* * Refresh vmcs.HOST_CR3 if necessary. This must be done immediately * prior to VM-Enter, as the kernel may load a new ASID (PCID) any time @@ -7550,26 +7474,6 @@ int vmx_vcpu_create(struct kvm_vcpu *vcpu) evmcs->hv_enlightenments_control.msr_bitmap = 1; } - /* The MSR bitmap starts with all ones */ - bitmap_fill(vmx->shadow_msr_intercept.read, MAX_POSSIBLE_PASSTHROUGH_MSRS); - bitmap_fill(vmx->shadow_msr_intercept.write, MAX_POSSIBLE_PASSTHROUGH_MSRS); - - vmx_disable_intercept_for_msr(vcpu, MSR_IA32_TSC, MSR_TYPE_R); -#ifdef CONFIG_X86_64 - vmx_disable_intercept_for_msr(vcpu, MSR_FS_BASE, MSR_TYPE_RW); - vmx_disable_intercept_for_msr(vcpu, MSR_GS_BASE, MSR_TYPE_RW); - vmx_disable_intercept_for_msr(vcpu, MSR_KERNEL_GS_BASE, MSR_TYPE_RW); -#endif - vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_CS, MSR_TYPE_RW); - vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_ESP, MSR_TYPE_RW); - vmx_disable_intercept_for_msr(vcpu, MSR_IA32_SYSENTER_EIP, MSR_TYPE_RW); - if (kvm_cstate_in_guest(vcpu->kvm)) { - vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C1_RES, MSR_TYPE_R); - vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C3_RESIDENCY, MSR_TYPE_R); - vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C6_RESIDENCY, MSR_TYPE_R); - vmx_disable_intercept_for_msr(vcpu, MSR_CORE_C7_RESIDENCY, MSR_TYPE_R); - } - vmx->loaded_vmcs = &vmx->vmcs01; if (cpu_need_virtualize_apic_accesses(vcpu)) { @@ -7619,7 +7523,7 @@ free_vpid: int vmx_vm_init(struct kvm *kvm) { if (!ple_gap) - kvm->arch.pause_in_guest = true; + kvm_disable_exits(kvm, KVM_X86_DISABLE_EXITS_PAUSE); if (boot_cpu_has(X86_BUG_L1TF) && enable_ept) { switch (l1tf_mitigation) { @@ -7856,18 +7760,6 @@ void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu) } } - if (kvm_cpu_cap_has(X86_FEATURE_XFD)) - vmx_set_intercept_for_msr(vcpu, MSR_IA32_XFD_ERR, MSR_TYPE_R, - !guest_cpu_cap_has(vcpu, X86_FEATURE_XFD)); - - if (boot_cpu_has(X86_FEATURE_IBPB)) - vmx_set_intercept_for_msr(vcpu, MSR_IA32_PRED_CMD, MSR_TYPE_W, - !guest_has_pred_cmd_msr(vcpu)); - - if (boot_cpu_has(X86_FEATURE_FLUSH_L1D)) - vmx_set_intercept_for_msr(vcpu, MSR_IA32_FLUSH_CMD, MSR_TYPE_W, - !guest_cpu_cap_has(vcpu, X86_FEATURE_FLUSH_L1D)); - set_cr4_guest_host_mask(vmx); vmx_write_encls_bitmap(vcpu, NULL); @@ -7883,6 +7775,9 @@ void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu) vmx->msr_ia32_feature_control_valid_bits &= ~FEAT_CTL_SGX_LC_ENABLED; + /* Recalc MSR interception to account for feature changes. */ + vmx_recalc_msr_intercepts(vcpu); + /* Refresh #PF interception to account for MAXPHYADDR changes. */ vmx_update_exception_bitmap(vcpu); } @@ -8657,6 +8552,8 @@ int __init vmx_init(void) { int r, cpu; + KVM_SANITY_CHECK_VM_STRUCT_SIZE(kvm_vmx); + if (!kvm_is_vmx_supported()) return -EOPNOTSUPP; diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index 6d1e40ecc024..d3389baf3ab3 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -19,8 +19,6 @@ #include "../mmu.h" #include "common.h" -#define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4)) - #ifdef CONFIG_X86_64 #define MAX_NR_USER_RETURN_MSRS 7 #else @@ -296,13 +294,6 @@ struct vcpu_vmx { struct pt_desc pt_desc; struct lbr_desc lbr_desc; - /* Save desired MSR intercept (read: pass-through) state */ -#define MAX_POSSIBLE_PASSTHROUGH_MSRS 16 - struct { - DECLARE_BITMAP(read, MAX_POSSIBLE_PASSTHROUGH_MSRS); - DECLARE_BITMAP(write, MAX_POSSIBLE_PASSTHROUGH_MSRS); - } shadow_msr_intercept; - /* ve_info must be page aligned. */ struct vmx_ve_information *ve_info; }; @@ -354,8 +345,7 @@ static __always_inline u32 vmx_get_intr_info(struct kvm_vcpu *vcpu) return vt->exit_intr_info; } -void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, - struct loaded_vmcs *buddy); +void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu); int allocate_vpid(void); void free_vpid(int vpid); void vmx_set_constant_host_state(struct vcpu_vmx *vmx); @@ -396,24 +386,54 @@ bool __vmx_vcpu_run(struct vcpu_vmx *vmx, unsigned long *regs, int vmx_find_loadstore_msr_slot(struct vmx_msrs *m, u32 msr); void vmx_ept_load_pdptrs(struct kvm_vcpu *vcpu); -void vmx_disable_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type); -void vmx_enable_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type); +void vmx_set_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, int type, bool set); + +static inline void vmx_disable_intercept_for_msr(struct kvm_vcpu *vcpu, + u32 msr, int type) +{ + vmx_set_intercept_for_msr(vcpu, msr, type, false); +} + +static inline void vmx_enable_intercept_for_msr(struct kvm_vcpu *vcpu, + u32 msr, int type) +{ + vmx_set_intercept_for_msr(vcpu, msr, type, true); +} u64 vmx_get_l2_tsc_offset(struct kvm_vcpu *vcpu); u64 vmx_get_l2_tsc_multiplier(struct kvm_vcpu *vcpu); gva_t vmx_get_untagged_addr(struct kvm_vcpu *vcpu, gva_t gva, unsigned int flags); -static inline void vmx_set_intercept_for_msr(struct kvm_vcpu *vcpu, u32 msr, - int type, bool value) +void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu); + +u64 vmx_get_supported_debugctl(struct kvm_vcpu *vcpu, bool host_initiated); +bool vmx_is_valid_debugctl(struct kvm_vcpu *vcpu, u64 data, bool host_initiated); + +#define VMX_HOST_OWNED_DEBUGCTL_BITS (DEBUGCTLMSR_FREEZE_IN_SMM) + +static inline void vmx_guest_debugctl_write(struct kvm_vcpu *vcpu, u64 val) { - if (value) - vmx_enable_intercept_for_msr(vcpu, msr, type); - else - vmx_disable_intercept_for_msr(vcpu, msr, type); + WARN_ON_ONCE(val & VMX_HOST_OWNED_DEBUGCTL_BITS); + + val |= vcpu->arch.host_debugctl & VMX_HOST_OWNED_DEBUGCTL_BITS; + vmcs_write64(GUEST_IA32_DEBUGCTL, val); } -void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu); +static inline u64 vmx_guest_debugctl_read(void) +{ + return vmcs_read64(GUEST_IA32_DEBUGCTL) & ~VMX_HOST_OWNED_DEBUGCTL_BITS; +} + +static inline void vmx_reload_guest_debugctl(struct kvm_vcpu *vcpu) +{ + u64 val = vmcs_read64(GUEST_IA32_DEBUGCTL); + + if (!((val ^ vcpu->arch.host_debugctl) & VMX_HOST_OWNED_DEBUGCTL_BITS)) + return; + + vmx_guest_debugctl_write(vcpu, val & ~VMX_HOST_OWNED_DEBUGCTL_BITS); +} /* * Note, early Intel manuals have the write-low and read-high bitmap offsets diff --git a/arch/x86/kvm/vmx/x86_ops.h b/arch/x86/kvm/vmx/x86_ops.h index 6bf8be570b2e..2b3424f638db 100644 --- a/arch/x86/kvm/vmx/x86_ops.h +++ b/arch/x86/kvm/vmx/x86_ops.h @@ -21,7 +21,7 @@ void vmx_vm_destroy(struct kvm *kvm); int vmx_vcpu_precreate(struct kvm *kvm); int vmx_vcpu_create(struct kvm_vcpu *vcpu); int vmx_vcpu_pre_run(struct kvm_vcpu *vcpu); -fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit); +fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, u64 run_flags); void vmx_vcpu_free(struct kvm_vcpu *vcpu); void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu); @@ -52,11 +52,12 @@ void vmx_deliver_interrupt(struct kvm_lapic *apic, int delivery_mode, int trig_mode, int vector); void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu); bool vmx_has_emulated_msr(struct kvm *kvm, u32 index); -void vmx_msr_filter_changed(struct kvm_vcpu *vcpu); +void vmx_recalc_msr_intercepts(struct kvm_vcpu *vcpu); void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu); void vmx_update_exception_bitmap(struct kvm_vcpu *vcpu); int vmx_get_feature_msr(u32 msr, u64 *data); int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); +#define vmx_complete_emulated_msr kvm_complete_insn_gp u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg); void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); void vmx_set_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); @@ -132,10 +133,9 @@ void tdx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); void tdx_vcpu_free(struct kvm_vcpu *vcpu); void tdx_vcpu_load(struct kvm_vcpu *vcpu, int cpu); int tdx_vcpu_pre_run(struct kvm_vcpu *vcpu); -fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit); +fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, u64 run_flags); void tdx_prepare_switch_to_guest(struct kvm_vcpu *vcpu); void tdx_vcpu_put(struct kvm_vcpu *vcpu); -bool tdx_protected_apic_has_interrupt(struct kvm_vcpu *vcpu); int tdx_handle_exit(struct kvm_vcpu *vcpu, enum exit_fastpath_completion fastpath); @@ -150,84 +150,10 @@ int tdx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr); int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp); -int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, void *private_spt); -int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, void *private_spt); -int tdx_sept_set_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, kvm_pfn_t pfn); -int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, kvm_pfn_t pfn); - void tdx_flush_tlb_current(struct kvm_vcpu *vcpu); void tdx_flush_tlb_all(struct kvm_vcpu *vcpu); void tdx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, int root_level); int tdx_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn); -#else -static inline void tdx_disable_virtualization_cpu(void) {} -static inline int tdx_vm_init(struct kvm *kvm) { return -EOPNOTSUPP; } -static inline void tdx_mmu_release_hkid(struct kvm *kvm) {} -static inline void tdx_vm_destroy(struct kvm *kvm) {} -static inline int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; } - -static inline int tdx_vcpu_create(struct kvm_vcpu *vcpu) { return -EOPNOTSUPP; } -static inline void tdx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) {} -static inline void tdx_vcpu_free(struct kvm_vcpu *vcpu) {} -static inline void tdx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) {} -static inline int tdx_vcpu_pre_run(struct kvm_vcpu *vcpu) { return -EOPNOTSUPP; } -static inline fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit) -{ - return EXIT_FASTPATH_NONE; -} -static inline void tdx_prepare_switch_to_guest(struct kvm_vcpu *vcpu) {} -static inline void tdx_vcpu_put(struct kvm_vcpu *vcpu) {} -static inline bool tdx_protected_apic_has_interrupt(struct kvm_vcpu *vcpu) { return false; } -static inline int tdx_handle_exit(struct kvm_vcpu *vcpu, - enum exit_fastpath_completion fastpath) { return 0; } - -static inline void tdx_deliver_interrupt(struct kvm_lapic *apic, int delivery_mode, - int trig_mode, int vector) {} -static inline void tdx_inject_nmi(struct kvm_vcpu *vcpu) {} -static inline void tdx_get_exit_info(struct kvm_vcpu *vcpu, u32 *reason, u64 *info1, - u64 *info2, u32 *intr_info, u32 *error_code) {} -static inline bool tdx_has_emulated_msr(u32 index) { return false; } -static inline int tdx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) { return 1; } -static inline int tdx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) { return 1; } - -static inline int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp) { return -EOPNOTSUPP; } - -static inline int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, - void *private_spt) -{ - return -EOPNOTSUPP; -} - -static inline int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, - enum pg_level level, - void *private_spt) -{ - return -EOPNOTSUPP; -} - -static inline int tdx_sept_set_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, - kvm_pfn_t pfn) -{ - return -EOPNOTSUPP; -} - -static inline int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, - kvm_pfn_t pfn) -{ - return -EOPNOTSUPP; -} - -static inline void tdx_flush_tlb_current(struct kvm_vcpu *vcpu) {} -static inline void tdx_flush_tlb_all(struct kvm_vcpu *vcpu) {} -static inline void tdx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, int root_level) {} -static inline int tdx_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn) { return 0; } #endif #endif /* __KVM_X86_VMX_X86_OPS_H */ |