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| author | Marc Zyngier <maz@kernel.org> | 2025-01-12 10:40:10 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2025-01-12 10:40:10 +0000 |
| commit | e880b16efb78f9c7449239a76814aeb015daf2a1 (patch) | |
| tree | e940c62150637e840e4db455eee399a6846685ce | |
| parent | d0670128d42fa170bf8ba878cd23504c5c5cccc7 (diff) | |
| parent | 4e26de25d2b617e12bba98e11393fdf7c27885f9 (diff) | |
| download | linux-e880b16efb78f9c7449239a76814aeb015daf2a1.tar.gz linux-e880b16efb78f9c7449239a76814aeb015daf2a1.tar.bz2 linux-e880b16efb78f9c7449239a76814aeb015daf2a1.zip | |
Merge branch kvm-arm64/pkvm-fixed-features-6.14 into kvmarm-master/next
* kvm-arm64/pkvm-fixed-features-6.14: (24 commits)
: .
: Complete rework of the pKVM handling of features, catching up
: with the rest of the code deals with it these days.
: Patches courtesy of Fuad Tabba. From the cover letter:
:
: "This patch series uses the vm's feature id registers to track the
: supported features, a framework similar to nested virt to set the
: trap values, and removes the need to store cptr_el2 per vcpu in
: favor of setting its value when traps are activated, as VHE mode
: does."
:
: This branch drags the arm64/for-next/cpufeature branch to solve
: ugly conflicts in -next.
: .
KVM: arm64: Fix FEAT_MTE in pKVM
KVM: arm64: Use kvm_vcpu_has_feature() directly for struct kvm
KVM: arm64: Convert the SVE guest vcpu flag to a vm flag
KVM: arm64: Remove PtrAuth guest vcpu flag
KVM: arm64: Fix the value of the CPTR_EL2 RES1 bitmask for nVHE
KVM: arm64: Refactor kvm_reset_cptr_el2()
KVM: arm64: Calculate cptr_el2 traps on activating traps
KVM: arm64: Remove redundant setting of HCR_EL2 trap bit
KVM: arm64: Remove fixed_config.h header
KVM: arm64: Rework specifying restricted features for protected VMs
KVM: arm64: Set protected VM traps based on its view of feature registers
KVM: arm64: Fix RAS trapping in pKVM for protected VMs
KVM: arm64: Initialize feature id registers for protected VMs
KVM: arm64: Use KVM extension checks for allowed protected VM capabilities
KVM: arm64: Remove KVM_ARM_VCPU_POWER_OFF from protected VMs allowed features in pKVM
KVM: arm64: Move checking protected vcpu features to a separate function
KVM: arm64: Group setting traps for protected VMs by control register
KVM: arm64: Consolidate allowed and restricted VM feature checks
arm64/sysreg: Get rid of CPACR_ELx SysregFields
arm64/sysreg: Convert *_EL12 accessors to Mapping
...
Signed-off-by: Marc Zyngier <maz@kernel.org>
# Conflicts:
# arch/arm64/kvm/fpsimd.c
# arch/arm64/kvm/hyp/nvhe/pkvm.c
27 files changed, 533 insertions, 789 deletions
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index cbbf70e0f204..0b5ca6e0eb09 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -46,6 +46,8 @@ cpucap_is_possible(const unsigned int cap) return IS_ENABLED(CONFIG_ARM64_POE); case ARM64_HAS_GCS: return IS_ENABLED(CONFIG_ARM64_GCS); + case ARM64_HAFT: + return IS_ENABLED(CONFIG_ARM64_HAFT); case ARM64_UNMAP_KERNEL_AT_EL0: return IS_ENABLED(CONFIG_UNMAP_KERNEL_AT_EL0); case ARM64_WORKAROUND_843419: diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 8b4e5a3cd24c..a4d0b77a68d9 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -852,8 +852,7 @@ static inline bool system_supports_gcs(void) static inline bool system_supports_haft(void) { - return IS_ENABLED(CONFIG_ARM64_HAFT) && - cpus_have_final_cap(ARM64_HAFT); + return cpus_have_final_cap(ARM64_HAFT); } static __always_inline bool system_supports_mpam(void) diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index 4ef52d7245bb..25e162651750 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -154,7 +154,7 @@ /* Coprocessor traps */ .macro __init_el2_cptr __check_hvhe .LnVHE_\@, x1 - mov x0, #CPACR_ELx_FPEN + mov x0, #CPACR_EL1_FPEN msr cpacr_el1, x0 b .Lskip_set_cptr_\@ .LnVHE_\@: @@ -332,7 +332,7 @@ // (h)VHE case mrs x0, cpacr_el1 // Disable SVE traps - orr x0, x0, #CPACR_ELx_ZEN + orr x0, x0, #CPACR_EL1_ZEN msr cpacr_el1, x0 b .Lskip_set_cptr_\@ @@ -353,7 +353,7 @@ // (h)VHE case mrs x0, cpacr_el1 // Disable SME traps - orr x0, x0, #CPACR_ELx_SMEN + orr x0, x0, #CPACR_EL1_SMEN msr cpacr_el1, x0 b .Lskip_set_cptr_sme_\@ diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 3e0f0de1d2da..8d94a6c0ed5c 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -300,7 +300,7 @@ #define CPTR_EL2_TSM (1 << 12) #define CPTR_EL2_TFP (1 << CPTR_EL2_TFP_SHIFT) #define CPTR_EL2_TZ (1 << 8) -#define CPTR_NVHE_EL2_RES1 0x000032ff /* known RES1 bits in CPTR_EL2 (nVHE) */ +#define CPTR_NVHE_EL2_RES1 (BIT(13) | BIT(9) | GENMASK(7, 0)) #define CPTR_NVHE_EL2_RES0 (GENMASK(63, 32) | \ GENMASK(29, 21) | \ GENMASK(19, 14) | \ @@ -391,8 +391,6 @@ ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \ ECN(BKPT32), ECN(VECTOR32), ECN(BRK64), ECN(ERET) -#define CPACR_EL1_TTA (1 << 28) - #define kvm_mode_names \ { PSR_MODE_EL0t, "EL0t" }, \ { PSR_MODE_EL1t, "EL1t" }, \ diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index cf811009a33c..55ddc1352373 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -556,13 +556,13 @@ static __always_inline void kvm_incr_pc(struct kvm_vcpu *vcpu) ({ \ u64 cptr = 0; \ \ - if ((set) & CPACR_ELx_FPEN) \ + if ((set) & CPACR_EL1_FPEN) \ cptr |= CPTR_EL2_TFP; \ - if ((set) & CPACR_ELx_ZEN) \ + if ((set) & CPACR_EL1_ZEN) \ cptr |= CPTR_EL2_TZ; \ - if ((set) & CPACR_ELx_SMEN) \ + if ((set) & CPACR_EL1_SMEN) \ cptr |= CPTR_EL2_TSM; \ - if ((clr) & CPACR_ELx_TTA) \ + if ((clr) & CPACR_EL1_TTA) \ cptr |= CPTR_EL2_TTA; \ if ((clr) & CPTR_EL2_TAM) \ cptr |= CPTR_EL2_TAM; \ @@ -576,13 +576,13 @@ static __always_inline void kvm_incr_pc(struct kvm_vcpu *vcpu) ({ \ u64 cptr = 0; \ \ - if ((clr) & CPACR_ELx_FPEN) \ + if ((clr) & CPACR_EL1_FPEN) \ cptr |= CPTR_EL2_TFP; \ - if ((clr) & CPACR_ELx_ZEN) \ + if ((clr) & CPACR_EL1_ZEN) \ cptr |= CPTR_EL2_TZ; \ - if ((clr) & CPACR_ELx_SMEN) \ + if ((clr) & CPACR_EL1_SMEN) \ cptr |= CPTR_EL2_TSM; \ - if ((set) & CPACR_ELx_TTA) \ + if ((set) & CPACR_EL1_TTA) \ cptr |= CPTR_EL2_TTA; \ if ((set) & CPTR_EL2_TAM) \ cptr |= CPTR_EL2_TAM; \ @@ -595,13 +595,13 @@ static __always_inline void kvm_incr_pc(struct kvm_vcpu *vcpu) #define cpacr_clear_set(clr, set) \ do { \ BUILD_BUG_ON((set) & CPTR_VHE_EL2_RES0); \ - BUILD_BUG_ON((clr) & CPACR_ELx_E0POE); \ - __build_check_all_or_none((clr), CPACR_ELx_FPEN); \ - __build_check_all_or_none((set), CPACR_ELx_FPEN); \ - __build_check_all_or_none((clr), CPACR_ELx_ZEN); \ - __build_check_all_or_none((set), CPACR_ELx_ZEN); \ - __build_check_all_or_none((clr), CPACR_ELx_SMEN); \ - __build_check_all_or_none((set), CPACR_ELx_SMEN); \ + BUILD_BUG_ON((clr) & CPACR_EL1_E0POE); \ + __build_check_all_or_none((clr), CPACR_EL1_FPEN); \ + __build_check_all_or_none((set), CPACR_EL1_FPEN); \ + __build_check_all_or_none((clr), CPACR_EL1_ZEN); \ + __build_check_all_or_none((set), CPACR_EL1_ZEN); \ + __build_check_all_or_none((clr), CPACR_EL1_SMEN); \ + __build_check_all_or_none((set), CPACR_EL1_SMEN); \ \ if (has_vhe() || has_hvhe()) \ sysreg_clear_set(cpacr_el1, clr, set); \ @@ -619,40 +619,40 @@ static __always_inline void kvm_write_cptr_el2(u64 val) write_sysreg(val, cptr_el2); } -static __always_inline u64 kvm_get_reset_cptr_el2(struct kvm_vcpu *vcpu) +/* Resets the value of cptr_el2 when returning to the host. */ +static __always_inline void __kvm_reset_cptr_el2(struct kvm *kvm) { u64 val; if (has_vhe()) { - val = (CPACR_ELx_FPEN | CPACR_EL1_ZEN_EL1EN); + val = (CPACR_EL1_FPEN | CPACR_EL1_ZEN_EL1EN); if (cpus_have_final_cap(ARM64_SME)) val |= CPACR_EL1_SMEN_EL1EN; } else if (has_hvhe()) { - val = CPACR_ELx_FPEN; + val = CPACR_EL1_FPEN; - if (!vcpu_has_sve(vcpu) || !guest_owns_fp_regs()) - val |= CPACR_ELx_ZEN; + if (!kvm_has_sve(kvm) || !guest_owns_fp_regs()) + val |= CPACR_EL1_ZEN; if (cpus_have_final_cap(ARM64_SME)) - val |= CPACR_ELx_SMEN; + val |= CPACR_EL1_SMEN; } else { val = CPTR_NVHE_EL2_RES1; - if (vcpu_has_sve(vcpu) && guest_owns_fp_regs()) + if (kvm_has_sve(kvm) && guest_owns_fp_regs()) val |= CPTR_EL2_TZ; - if (cpus_have_final_cap(ARM64_SME)) - val &= ~CPTR_EL2_TSM; + if (!cpus_have_final_cap(ARM64_SME)) + val |= CPTR_EL2_TSM; } - return val; -} - -static __always_inline void kvm_reset_cptr_el2(struct kvm_vcpu *vcpu) -{ - u64 val = kvm_get_reset_cptr_el2(vcpu); - kvm_write_cptr_el2(val); } +#ifdef __KVM_NVHE_HYPERVISOR__ +#define kvm_reset_cptr_el2(v) __kvm_reset_cptr_el2(kern_hyp_va((v)->kvm)) +#else +#define kvm_reset_cptr_el2(v) __kvm_reset_cptr_el2((v)->kvm) +#endif + /* * Returns a 'sanitised' view of CPTR_EL2, translating from nVHE to the VHE * format if E2H isn't set. @@ -685,7 +685,7 @@ static inline bool ____cptr_xen_trap_enabled(const struct kvm_vcpu *vcpu, #define __guest_hyp_cptr_xen_trap_enabled(vcpu, xen) \ (!vcpu_has_nv(vcpu) ? false : \ ____cptr_xen_trap_enabled(vcpu, \ - SYS_FIELD_GET(CPACR_ELx, xen, \ + SYS_FIELD_GET(CPACR_EL1, xen, \ vcpu_sanitised_cptr_el2(vcpu)))) static inline bool guest_hyp_fpsimd_traps_enabled(const struct kvm_vcpu *vcpu) @@ -697,9 +697,4 @@ static inline bool guest_hyp_sve_traps_enabled(const struct kvm_vcpu *vcpu) { return __guest_hyp_cptr_xen_trap_enabled(vcpu, ZEN); } - -static inline void kvm_vcpu_enable_ptrauth(struct kvm_vcpu *vcpu) -{ - vcpu_set_flag(vcpu, GUEST_HAS_PTRAUTH); -} #endif /* __ARM64_KVM_EMULATE_H__ */ diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index ad6480163dd5..934821282c07 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -332,6 +332,8 @@ struct kvm_arch { #define KVM_ARCH_FLAG_ID_REGS_INITIALIZED 7 /* Fine-Grained UNDEF initialised */ #define KVM_ARCH_FLAG_FGU_INITIALIZED 8 + /* SVE exposed to guest */ +#define KVM_ARCH_FLAG_GUEST_HAS_SVE 9 unsigned long flags; /* VM-wide vCPU feature set */ @@ -722,7 +724,6 @@ struct kvm_vcpu_arch { u64 hcr_el2; u64 hcrx_el2; u64 mdcr_el2; - u64 cptr_el2; /* Exception Information */ struct kvm_vcpu_fault_info fault; @@ -871,14 +872,10 @@ struct kvm_vcpu_arch { #define vcpu_set_flag(v, ...) __vcpu_set_flag((v), __VA_ARGS__) #define vcpu_clear_flag(v, ...) __vcpu_clear_flag((v), __VA_ARGS__) -/* SVE exposed to guest */ -#define GUEST_HAS_SVE __vcpu_single_flag(cflags, BIT(0)) +/* KVM_ARM_VCPU_INIT completed */ +#define VCPU_INITIALIZED __vcpu_single_flag(cflags, BIT(0)) /* SVE config completed */ #define VCPU_SVE_FINALIZED __vcpu_single_flag(cflags, BIT(1)) -/* PTRAUTH exposed to guest */ -#define GUEST_HAS_PTRAUTH __vcpu_single_flag(cflags, BIT(2)) -/* KVM_ARM_VCPU_INIT completed */ -#define VCPU_INITIALIZED __vcpu_single_flag(cflags, BIT(3)) /* Exception pending */ #define PENDING_EXCEPTION __vcpu_single_flag(iflags, BIT(0)) @@ -959,14 +956,21 @@ struct kvm_vcpu_arch { KVM_GUESTDBG_USE_HW | \ KVM_GUESTDBG_SINGLESTEP) -#define vcpu_has_sve(vcpu) (system_supports_sve() && \ - vcpu_get_flag(vcpu, GUEST_HAS_SVE)) +#define kvm_has_sve(kvm) (system_supports_sve() && \ + test_bit(KVM_ARCH_FLAG_GUEST_HAS_SVE, &(kvm)->arch.flags)) + +#ifdef __KVM_NVHE_HYPERVISOR__ +#define vcpu_has_sve(vcpu) kvm_has_sve(kern_hyp_va((vcpu)->kvm)) +#else +#define vcpu_has_sve(vcpu) kvm_has_sve((vcpu)->kvm) +#endif #ifdef CONFIG_ARM64_PTR_AUTH #define vcpu_has_ptrauth(vcpu) \ ((cpus_have_final_cap(ARM64_HAS_ADDRESS_AUTH) || \ cpus_have_final_cap(ARM64_HAS_GENERIC_AUTH)) && \ - vcpu_get_flag(vcpu, GUEST_HAS_PTRAUTH)) + (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PTRAUTH_ADDRESS) || \ + vcpu_has_feature(vcpu, KVM_ARM_VCPU_PTRAUTH_GENERIC))) #else #define vcpu_has_ptrauth(vcpu) false #endif @@ -1432,6 +1436,7 @@ static inline bool __vcpu_has_feature(const struct kvm_arch *ka, int feature) return test_bit(feature, ka->vcpu_features); } +#define kvm_vcpu_has_feature(k, f) __vcpu_has_feature(&(k)->arch, (f)) #define vcpu_has_feature(v, f) __vcpu_has_feature(&(v)->kvm->arch, (f)) #define kvm_vcpu_initialized(v) vcpu_get_flag(vcpu, VCPU_INITIALIZED) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index ec6e28d63d26..bc0f2f4fa1ba 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -33,14 +33,14 @@ static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr) static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2) { - u64 cpacr_el1 = CPACR_ELx_RES1; + u64 cpacr_el1 = CPACR_EL1_RES1; if (cptr_el2 & CPTR_EL2_TTA) - cpacr_el1 |= CPACR_ELx_TTA; + cpacr_el1 |= CPACR_EL1_TTA; if (!(cptr_el2 & CPTR_EL2_TFP)) - cpacr_el1 |= CPACR_ELx_FPEN; + cpacr_el1 |= CPACR_EL1_FPEN; if (!(cptr_el2 & CPTR_EL2_TZ)) - cpacr_el1 |= CPACR_ELx_ZEN; + cpacr_el1 |= CPACR_EL1_ZEN; cpacr_el1 |= cptr_el2 & (CPTR_EL2_TCPAC | CPTR_EL2_TAM); diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h index 65f988b6fe0d..eb65f12e81d9 100644 --- a/arch/arm64/include/asm/kvm_pkvm.h +++ b/arch/arm64/include/asm/kvm_pkvm.h @@ -20,6 +20,31 @@ int pkvm_init_host_vm(struct kvm *kvm); int pkvm_create_hyp_vm(struct kvm *kvm); void pkvm_destroy_hyp_vm(struct kvm *kvm); +/* + * This functions as an allow-list of protected VM capabilities. + * Features not explicitly allowed by this function are denied. + */ +static inline bool kvm_pvm_ext_allowed(long ext) +{ + switch (ext) { + case KVM_CAP_IRQCHIP: + case KVM_CAP_ARM_PSCI: + case KVM_CAP_ARM_PSCI_0_2: + case KVM_CAP_NR_VCPUS: + case KVM_CAP_MAX_VCPUS: + case KVM_CAP_MAX_VCPU_ID: + case KVM_CAP_MSI_DEVID: + case KVM_CAP_ARM_VM_IPA_SIZE: + case KVM_CAP_ARM_PMU_V3: + case KVM_CAP_ARM_SVE: + case KVM_CAP_ARM_PTRAUTH_ADDRESS: + case KVM_CAP_ARM_PTRAUTH_GENERIC: + return true; + default: + return false; + } +} + extern struct memblock_region kvm_nvhe_sym(hyp_memory)[]; extern unsigned int kvm_nvhe_sym(hyp_memblock_nr); diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6ce71f444ed8..13de0c7af053 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1004,17 +1004,16 @@ static void init_cpu_ftr_reg(u32 sys_reg, u64 new) /* Override was valid */ ftr_new = tmp; str = "forced"; - } else if (ftr_ovr == tmp) { + } else { /* Override was the safe value */ str = "already set"; } - if (str) - pr_warn("%s[%d:%d]: %s to %llx\n", - reg->name, - ftrp->shift + ftrp->width - 1, - ftrp->shift, str, - tmp & (BIT(ftrp->width) - 1)); + pr_warn("%s[%d:%d]: %s to %llx\n", + reg->name, + ftrp->shift + ftrp->width - 1, + ftrp->shift, str, + tmp & (BIT(ftrp->width) - 1)); } else if ((ftr_mask & reg->override->val) == ftr_mask) { reg->override->val &= ~ftr_mask; pr_warn("%s[%d:%d]: impossible override, ignored\n", @@ -2376,8 +2375,8 @@ static void cpu_enable_mops(const struct arm64_cpu_capabilities *__unused) #ifdef CONFIG_ARM64_POE static void cpu_enable_poe(const struct arm64_cpu_capabilities *__unused) { - sysreg_clear_set(REG_TCR2_EL1, 0, TCR2_EL1x_E0POE); - sysreg_clear_set(CPACR_EL1, 0, CPACR_ELx_E0POE); + sysreg_clear_set(REG_TCR2_EL1, 0, TCR2_EL1_E0POE); + sysreg_clear_set(CPACR_EL1, 0, CPACR_EL1_E0POE); } #endif diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 51e4ba6eb5c2..378c8c23d32a 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -80,31 +80,6 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; } -/* - * This functions as an allow-list of protected VM capabilities. - * Features not explicitly allowed by this function are denied. - */ -static bool pkvm_ext_allowed(struct kvm *kvm, long ext) -{ - switch (ext) { - case KVM_CAP_IRQCHIP: - case KVM_CAP_ARM_PSCI: - case KVM_CAP_ARM_PSCI_0_2: - case KVM_CAP_NR_VCPUS: - case KVM_CAP_MAX_VCPUS: - case KVM_CAP_MAX_VCPU_ID: - case KVM_CAP_MSI_DEVID: - case KVM_CAP_ARM_VM_IPA_SIZE: - case KVM_CAP_ARM_PMU_V3: - case KVM_CAP_ARM_SVE: - case KVM_CAP_ARM_PTRAUTH_ADDRESS: - case KVM_CAP_ARM_PTRAUTH_GENERIC: - return true; - default: - return false; - } -} - int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) { @@ -113,7 +88,7 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm, if (cap->flags) return -EINVAL; - if (kvm_vm_is_protected(kvm) && !pkvm_ext_allowed(kvm, cap->cap)) + if (kvm_vm_is_protected(kvm) && !kvm_pvm_ext_allowed(cap->cap)) return -EINVAL; switch (cap->cap) { @@ -311,7 +286,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) { int r; - if (kvm && kvm_vm_is_protected(kvm) && !pkvm_ext_allowed(kvm, ext)) + if (kvm && kvm_vm_is_protected(kvm) && !kvm_pvm_ext_allowed(ext)) return 0; switch (ext) { @@ -1584,7 +1559,6 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, } vcpu_reset_hcr(vcpu); - vcpu->arch.cptr_el2 = kvm_get_reset_cptr_el2(vcpu); /* * Handle the "start in power-off" case. diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c index 3d7eb395e33d..3a96c96816e9 100644 --- a/arch/arm64/kvm/at.c +++ b/arch/arm64/kvm/at.c @@ -111,7 +111,7 @@ static bool s1pie_enabled(struct kvm_vcpu *vcpu, enum trans_regime regime) return vcpu_read_sys_reg(vcpu, TCR2_EL2) & TCR2_EL2_PIE; case TR_EL10: return (__vcpu_sys_reg(vcpu, HCRX_EL2) & HCRX_EL2_TCR2En) && - (__vcpu_sys_reg(vcpu, TCR2_EL1) & TCR2_EL1x_PIE); + (__vcpu_sys_reg(vcpu, TCR2_EL1) & TCR2_EL1_PIE); default: BUG(); } @@ -140,8 +140,8 @@ static void compute_s1poe(struct kvm_vcpu *vcpu, struct s1_walk_info *wi) } val = __vcpu_sys_reg(vcpu, TCR2_EL1); - wi->poe = val & TCR2_EL1x_POE; - wi->e0poe = val & TCR2_EL1x_E0POE; + wi->poe = val & TCR2_EL1_POE; + wi->e0poe = val & TCR2_EL1_E0POE; } } diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index e37fb598cc24..4a2bbd6391bc 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -494,7 +494,7 @@ static enum trap_behaviour check_cptr_tta(struct kvm_vcpu *vcpu) if (!vcpu_el2_e2h_is_set(vcpu)) val = translate_cptr_el2_to_cpacr_el1(val); - if (val & CPACR_ELx_TTA) + if (val & CPACR_EL1_TTA) return BEHAVE_FORWARD_RW; return BEHAVE_HANDLE_LOCALLY; diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c index 0e0f37d1990a..4d3d1a2eb157 100644 --- a/arch/arm64/kvm/fpsimd.c +++ b/arch/arm64/kvm/fpsimd.c @@ -169,7 +169,7 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu) if (has_vhe() && system_supports_sme()) { /* Also restore EL0 state seen on entry */ if (host_data_test_flag(HOST_SME_ENABLED)) - sysreg_clear_set(CPACR_EL1, 0, CPACR_ELx_SMEN); + sysreg_clear_set(CPACR_EL1, 0, CPACR_EL1_SMEN); else sysreg_clear_set(CPACR_EL1, CPACR_EL1_SMEN_EL0EN, diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index 34f53707892d..abfa6ad92e91 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -419,9 +419,9 @@ static bool kvm_hyp_handle_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code) /* First disable enough traps to allow us to update the registers */ if (sve_guest || (is_protected_kvm_enabled() && system_supports_sve())) - cpacr_clear_set(0, CPACR_ELx_FPEN | CPACR_ELx_ZEN); + cpacr_clear_set(0, CPACR_EL1_FPEN | CPACR_EL1_ZEN); else - cpacr_clear_set(0, CPACR_ELx_FPEN); + cpacr_clear_set(0, CPACR_EL1_FPEN); isb(); /* Write out the host state if it's in the registers */ diff --git a/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h b/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h deleted file mode 100644 index f957890c7e38..000000000000 --- a/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h +++ /dev/null @@ -1,223 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2021 Google LLC - * Author: Fuad Tabba <tabba@google.com> - */ - -#ifndef __ARM64_KVM_FIXED_CONFIG_H__ -#define __ARM64_KVM_FIXED_CONFIG_H__ - -#include <asm/sysreg.h> - -/* - * This file contains definitions for features to be allowed or restricted for - * guest virtual machines, depending on the mode KVM is running in and on the - * type of guest that is running. - * - * The ALLOW masks represent a bitmask of feature fields that are allowed - * without any restrictions as long as they are supported by the system. - * - * The RESTRICT_UNSIGNED masks, if present, represent unsigned fields for - * features that are restricted to support at most the specified feature. - * - * If a feature field is not present in either, than it is not supported. - * - * The approach taken for protected VMs is to allow features that are: - * - Needed by common Linux distributions (e.g., floating point) - * - Trivial to support, e.g., supporting the feature does not introduce or - * require tracking of additional state in KVM - * - Cannot be trapped or prevent the guest from using anyway - */ - -/* - * Allow for protected VMs: - * - Floating-point and Advanced SIMD - * - Data Independent Timing - * - Spectre/Meltdown Mitigation - */ -#define PVM_ID_AA64PFR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_FP) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_AdvSIMD) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_DIT) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV2) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV3) \ - ) - -/* - * Restrict to the following *unsigned* features for protected VMs: - * - AArch64 guests only (no support for AArch32 guests): - * AArch32 adds complexity in trap handling, emulation, condition codes, - * etc... - * - RAS (v1) - * Supported by KVM - */ -#define PVM_ID_AA64PFR0_RESTRICT_UNSIGNED (\ - SYS_FIELD_PREP_ENUM(ID_AA64PFR0_EL1, EL0, IMP) | \ - SYS_FIELD_PREP_ENUM(ID_AA64PFR0_EL1, EL1, IMP) | \ - SYS_FIELD_PREP_ENUM(ID_AA64PFR0_EL1, EL2, IMP) | \ - SYS_FIELD_PREP_ENUM(ID_AA64PFR0_EL1, EL3, IMP) | \ - SYS_FIELD_PREP_ENUM(ID_AA64PFR0_EL1, RAS, IMP) \ - ) - -/* - * Allow for protected VMs: - * - Branch Target Identification - * - Speculative Store Bypassing - */ -#define PVM_ID_AA64PFR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_BT) | \ - ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_SSBS) \ - ) - -#define PVM_ID_AA64PFR2_ALLOW 0ULL - -/* - * Allow for protected VMs: - * - Mixed-endian - * - Distinction between Secure and Non-secure Memory - * - Mixed-endian at EL0 only - * - Non-context synchronizing exception entry and exit - */ -#define PVM_ID_AA64MMFR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_BIGEND) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_SNSMEM) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_BIGENDEL0) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_EXS) \ - ) - -/* - * Restrict to the following *unsigned* features for protected VMs: - * - 40-bit IPA - * - 16-bit ASID - */ -#define PVM_ID_AA64MMFR0_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_PARANGE), ID_AA64MMFR0_EL1_PARANGE_40) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_ASIDBITS), ID_AA64MMFR0_EL1_ASIDBITS_16) \ - ) - -/* - * Allow for protected VMs: - * - Hardware translation table updates to Access flag and Dirty state - * - Number of VMID bits from CPU - * - Hierarchical Permission Disables - * - Privileged Access Never - * - SError interrupt exceptions from speculative reads - * - Enhanced Translation Synchronization - * - Control for cache maintenance permission - */ -#define PVM_ID_AA64MMFR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_HAFDBS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_VMIDBits) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_HPDS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_PAN) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_SpecSEI) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_ETS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_CMOW) \ - ) - -/* - * Allow for protected VMs: - * - Common not Private translations - * - User Access Override - * - IESB bit in the SCTLR_ELx registers - * - Unaligned single-copy atomicity and atomic functions - * - ESR_ELx.EC value on an exception by read access to feature ID space - * - TTL field in address operations. - * - Break-before-make sequences when changing translation block size - * - E0PDx mechanism - */ -#define PVM_ID_AA64MMFR2_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_CnP) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_UAO) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_IESB) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_AT) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_IDS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_TTL) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_BBM) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_E0PD) \ - ) - -#define PVM_ID_AA64MMFR3_ALLOW (0ULL) - -/* - * No support for Scalable Vectors for protected VMs: - * Requires additional support from KVM, e.g., context-switching and - * trapping at EL2 - */ -#define PVM_ID_AA64ZFR0_ALLOW (0ULL) - -/* - * No support for debug, including breakpoints, and watchpoints for protected - * VMs: - * The Arm architecture mandates support for at least the Armv8 debug - * architecture, which would include at least 2 hardware breakpoints and - * watchpoints. Providing that support to protected guests adds - * considerable state and complexity. Therefore, the reserved value of 0 is - * used for debug-related fields. - */ -#define PVM_ID_AA64DFR0_ALLOW (0ULL) -#define PVM_ID_AA64DFR1_ALLOW (0ULL) - -/* - * No support for implementation defined features. - */ -#define PVM_ID_AA64AFR0_ALLOW (0ULL) -#define PVM_ID_AA64AFR1_ALLOW (0ULL) - -/* - * No restrictions on instructions implemented in AArch64. - */ -#define PVM_ID_AA64ISAR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_AES) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA1) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA2) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_CRC32) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_ATOMIC) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_RDM) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SM3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SM4) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_DP) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_FHM) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_TS) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_TLB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_RNDR) \ - ) - -/* Restrict pointer authentication to the basic version. */ -#define PVM_ID_AA64ISAR1_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_APA), ID_AA64ISAR1_EL1_APA_PAuth) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_API), ID_AA64ISAR1_EL1_API_PAuth) \ - ) - -#define PVM_ID_AA64ISAR2_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_APA3), ID_AA64ISAR2_EL1_APA3_PAuth) \ - ) - -#define PVM_ID_AA64ISAR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_DPB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_JSCVT) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_FCMA) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_LRCPC) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_GPA) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_GPI) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_FRINTTS) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_SB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_SPECRES) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_BF16) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_DGH) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_I8MM) \ - ) - -#define PVM_ID_AA64ISAR2_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_ATS1A)| \ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_GPA3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_MOPS) \ - ) - -u64 pvm_read_id_reg(const struct kvm_vcpu *vcpu, u32 id); -bool kvm_handle_pvm_sysreg(struct kvm_vcpu *vcpu, u64 *exit_code); -bool kvm_handle_pvm_rest |
