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218 lines
5.9 KiB
218 lines
5.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __KVM_X86_VMX_EVMCS_H |
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#define __KVM_X86_VMX_EVMCS_H |
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#include <linux/jump_label.h> |
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#include <asm/hyperv-tlfs.h> |
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#include <asm/mshyperv.h> |
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#include <asm/vmx.h> |
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#include "capabilities.h" |
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#include "vmcs.h" |
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#include "vmcs12.h" |
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struct vmcs_config; |
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DECLARE_STATIC_KEY_FALSE(enable_evmcs); |
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#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs)) |
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#define KVM_EVMCS_VERSION 1 |
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/* |
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* Enlightened VMCSv1 doesn't support these: |
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* |
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* POSTED_INTR_NV = 0x00000002, |
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* GUEST_INTR_STATUS = 0x00000810, |
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* APIC_ACCESS_ADDR = 0x00002014, |
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* POSTED_INTR_DESC_ADDR = 0x00002016, |
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* EOI_EXIT_BITMAP0 = 0x0000201c, |
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* EOI_EXIT_BITMAP1 = 0x0000201e, |
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* EOI_EXIT_BITMAP2 = 0x00002020, |
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* EOI_EXIT_BITMAP3 = 0x00002022, |
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* GUEST_PML_INDEX = 0x00000812, |
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* PML_ADDRESS = 0x0000200e, |
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* VM_FUNCTION_CONTROL = 0x00002018, |
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* EPTP_LIST_ADDRESS = 0x00002024, |
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* VMREAD_BITMAP = 0x00002026, |
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* VMWRITE_BITMAP = 0x00002028, |
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* |
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* TSC_MULTIPLIER = 0x00002032, |
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* PLE_GAP = 0x00004020, |
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* PLE_WINDOW = 0x00004022, |
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* VMX_PREEMPTION_TIMER_VALUE = 0x0000482E, |
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* GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808, |
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* HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04, |
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* |
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* Currently unsupported in KVM: |
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* GUEST_IA32_RTIT_CTL = 0x00002814, |
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*/ |
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#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \ |
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PIN_BASED_VMX_PREEMPTION_TIMER) |
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#define EVMCS1_UNSUPPORTED_2NDEXEC \ |
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(SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | \ |
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SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | \ |
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SECONDARY_EXEC_APIC_REGISTER_VIRT | \ |
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SECONDARY_EXEC_ENABLE_PML | \ |
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SECONDARY_EXEC_ENABLE_VMFUNC | \ |
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SECONDARY_EXEC_SHADOW_VMCS | \ |
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SECONDARY_EXEC_TSC_SCALING | \ |
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SECONDARY_EXEC_PAUSE_LOOP_EXITING) |
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#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) |
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#define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) |
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#define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING) |
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#if IS_ENABLED(CONFIG_HYPERV) |
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struct evmcs_field { |
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u16 offset; |
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u16 clean_field; |
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}; |
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extern const struct evmcs_field vmcs_field_to_evmcs_1[]; |
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extern const unsigned int nr_evmcs_1_fields; |
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static __always_inline int get_evmcs_offset(unsigned long field, |
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u16 *clean_field) |
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{ |
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unsigned int index = ROL16(field, 6); |
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const struct evmcs_field *evmcs_field; |
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if (unlikely(index >= nr_evmcs_1_fields)) { |
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WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n", |
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field); |
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return -ENOENT; |
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} |
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evmcs_field = &vmcs_field_to_evmcs_1[index]; |
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if (clean_field) |
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*clean_field = evmcs_field->clean_field; |
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return evmcs_field->offset; |
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} |
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static inline void evmcs_write64(unsigned long field, u64 value) |
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{ |
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u16 clean_field; |
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int offset = get_evmcs_offset(field, &clean_field); |
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if (offset < 0) |
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return; |
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*(u64 *)((char *)current_evmcs + offset) = value; |
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current_evmcs->hv_clean_fields &= ~clean_field; |
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} |
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static inline void evmcs_write32(unsigned long field, u32 value) |
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{ |
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u16 clean_field; |
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int offset = get_evmcs_offset(field, &clean_field); |
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if (offset < 0) |
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return; |
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*(u32 *)((char *)current_evmcs + offset) = value; |
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current_evmcs->hv_clean_fields &= ~clean_field; |
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} |
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static inline void evmcs_write16(unsigned long field, u16 value) |
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{ |
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u16 clean_field; |
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int offset = get_evmcs_offset(field, &clean_field); |
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if (offset < 0) |
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return; |
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*(u16 *)((char *)current_evmcs + offset) = value; |
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current_evmcs->hv_clean_fields &= ~clean_field; |
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} |
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static inline u64 evmcs_read64(unsigned long field) |
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{ |
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int offset = get_evmcs_offset(field, NULL); |
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if (offset < 0) |
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return 0; |
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return *(u64 *)((char *)current_evmcs + offset); |
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} |
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static inline u32 evmcs_read32(unsigned long field) |
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{ |
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int offset = get_evmcs_offset(field, NULL); |
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if (offset < 0) |
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return 0; |
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return *(u32 *)((char *)current_evmcs + offset); |
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} |
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static inline u16 evmcs_read16(unsigned long field) |
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{ |
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int offset = get_evmcs_offset(field, NULL); |
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if (offset < 0) |
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return 0; |
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return *(u16 *)((char *)current_evmcs + offset); |
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} |
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static inline void evmcs_touch_msr_bitmap(void) |
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{ |
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if (unlikely(!current_evmcs)) |
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return; |
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if (current_evmcs->hv_enlightenments_control.msr_bitmap) |
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current_evmcs->hv_clean_fields &= |
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~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP; |
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} |
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static inline void evmcs_load(u64 phys_addr) |
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{ |
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struct hv_vp_assist_page *vp_ap = |
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hv_get_vp_assist_page(smp_processor_id()); |
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if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall) |
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vp_ap->nested_control.features.directhypercall = 1; |
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vp_ap->current_nested_vmcs = phys_addr; |
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vp_ap->enlighten_vmentry = 1; |
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} |
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__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf); |
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#else /* !IS_ENABLED(CONFIG_HYPERV) */ |
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static inline void evmcs_write64(unsigned long field, u64 value) {} |
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static inline void evmcs_write32(unsigned long field, u32 value) {} |
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static inline void evmcs_write16(unsigned long field, u16 value) {} |
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static inline u64 evmcs_read64(unsigned long field) { return 0; } |
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static inline u32 evmcs_read32(unsigned long field) { return 0; } |
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static inline u16 evmcs_read16(unsigned long field) { return 0; } |
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static inline void evmcs_load(u64 phys_addr) {} |
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static inline void evmcs_touch_msr_bitmap(void) {} |
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#endif /* IS_ENABLED(CONFIG_HYPERV) */ |
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#define EVMPTR_INVALID (-1ULL) |
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#define EVMPTR_MAP_PENDING (-2ULL) |
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static inline bool evmptr_is_valid(u64 evmptr) |
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{ |
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return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING; |
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} |
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enum nested_evmptrld_status { |
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EVMPTRLD_DISABLED, |
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EVMPTRLD_SUCCEEDED, |
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EVMPTRLD_VMFAIL, |
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EVMPTRLD_ERROR, |
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}; |
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bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa); |
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uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu); |
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int nested_enable_evmcs(struct kvm_vcpu *vcpu, |
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uint16_t *vmcs_version); |
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void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata); |
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int nested_evmcs_check_controls(struct vmcs12 *vmcs12); |
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#endif /* __KVM_X86_VMX_EVMCS_H */
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