| 1 | /* |
| 2 | * x86-specific confidential guest methods. |
| 3 | * |
| 4 | * Copyright (c) 2024 Red Hat Inc. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Paolo Bonzini <pbonzini@redhat.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 10 | * See the COPYING file in the top-level directory. |
| 11 | */ |
| 12 | #ifndef TARGET_I386_CG_H |
| 13 | #define TARGET_I386_CG_H |
| 14 | |
| 15 | #include "qom/object.h" |
| 16 | |
| 17 | #include "system/confidential-guest-support.h" |
| 18 | |
| 19 | #define TYPE_X86_CONFIDENTIAL_GUEST "x86-confidential-guest" |
| 20 | |
| 21 | OBJECT_DECLARE_TYPE(X86ConfidentialGuest, |
| 22 | X86ConfidentialGuestClass, |
| 23 | X86_CONFIDENTIAL_GUEST) |
| 24 | |
| 25 | struct X86ConfidentialGuest { |
| 26 | /* <private> */ |
| 27 | ConfidentialGuestSupport parent_obj; |
| 28 | }; |
| 29 | |
| 30 | /** |
| 31 | * X86ConfidentialGuestClass: |
| 32 | * |
| 33 | * Class to be implemented by confidential-guest-support concrete objects |
| 34 | * for the x86 target. |
| 35 | */ |
| 36 | struct X86ConfidentialGuestClass { |
| 37 | /* <private> */ |
| 38 | ConfidentialGuestSupportClass parent; |
| 39 | |
| 40 | /* <public> */ |
| 41 | int (*kvm_type)(X86ConfidentialGuest *cg); |
| 42 | void (*cpu_instance_init)(X86ConfidentialGuest *cg, CPUState *cpu); |
| 43 | uint32_t (*adjust_cpuid_features)(X86ConfidentialGuest *cg, uint32_t feature, |
| 44 | uint32_t index, int reg, uint32_t value); |
| 45 | int (*check_features)(X86ConfidentialGuest *cg, CPUState *cs); |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * x86_confidential_guest_kvm_type: |
| 50 | * |
| 51 | * Calls #X86ConfidentialGuestClass.kvm_type() callback. |
| 52 | */ |
| 53 | static inline int x86_confidential_guest_kvm_type(X86ConfidentialGuest *cg) |
| 54 | { |
| 55 | X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg); |
| 56 | |
| 57 | if (klass->kvm_type) { |
| 58 | return klass->kvm_type(cg); |
| 59 | } else { |
| 60 | return 0; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | static inline void x86_confidential_guest_cpu_instance_init(X86ConfidentialGuest *cg, |
| 65 | CPUState *cpu) |
| 66 | { |
| 67 | X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg); |
| 68 | |
| 69 | if (klass->cpu_instance_init) { |
| 70 | klass->cpu_instance_init(cg, cpu); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * x86_confidential_guest_adjust_cpuid_features: |
| 76 | * |
| 77 | * Adjust the supported features from a confidential guest's CPUID values, |
| 78 | * returns the adjusted value. There are bits being removed that are not |
| 79 | * supported by the confidential computing firmware or bits being added that |
| 80 | * are forcibly exposed to guest by the confidential computing firmware. |
| 81 | */ |
| 82 | static inline int x86_confidential_guest_adjust_cpuid_features(X86ConfidentialGuest *cg, |
| 83 | uint32_t feature, uint32_t index, |
| 84 | int reg, uint32_t value) |
| 85 | { |
| 86 | X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg); |
| 87 | |
| 88 | if (klass->adjust_cpuid_features) { |
| 89 | return klass->adjust_cpuid_features(cg, feature, index, reg, value); |
| 90 | } else { |
| 91 | return value; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | static inline int x86_confidential_guest_check_features(X86ConfidentialGuest *cg, |
| 96 | CPUState *cs) |
| 97 | { |
| 98 | X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg); |
| 99 | |
| 100 | if (klass->check_features) { |
| 101 | return klass->check_features(cg, cs); |
| 102 | } |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | #endif |