diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/switch.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/switch.c | 87 |
1 files changed, 51 insertions, 36 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c index 6410d21d8695..6db801db8f27 100644 --- a/arch/arm64/kvm/hyp/nvhe/switch.c +++ b/arch/arm64/kvm/hyp/nvhe/switch.c @@ -47,10 +47,24 @@ static void __activate_traps(struct kvm_vcpu *vcpu) val |= CPTR_EL2_TFP | CPTR_EL2_TZ; __activate_traps_fpsimd32(vcpu); } + if (cpus_have_final_cap(ARM64_SME)) + val |= CPTR_EL2_TSM; write_sysreg(val, cptr_el2); write_sysreg(__this_cpu_read(kvm_hyp_vector), vbar_el2); + if (cpus_have_final_cap(ARM64_SME)) { + val = read_sysreg_s(SYS_HFGRTR_EL2); + val &= ~(HFGxTR_EL2_nTPIDR2_EL0_MASK | + HFGxTR_EL2_nSMPRI_EL1_MASK); + write_sysreg_s(val, SYS_HFGRTR_EL2); + + val = read_sysreg_s(SYS_HFGWTR_EL2); + val &= ~(HFGxTR_EL2_nTPIDR2_EL0_MASK | + HFGxTR_EL2_nSMPRI_EL1_MASK); + write_sysreg_s(val, SYS_HFGWTR_EL2); + } + if (cpus_have_final_cap(ARM64_WORKAROUND_SPECULATIVE_AT)) { struct kvm_cpu_context *ctxt = &vcpu->arch.ctxt; @@ -94,9 +108,25 @@ static void __deactivate_traps(struct kvm_vcpu *vcpu) write_sysreg(this_cpu_ptr(&kvm_init_params)->hcr_el2, hcr_el2); + if (cpus_have_final_cap(ARM64_SME)) { + u64 val; + + val = read_sysreg_s(SYS_HFGRTR_EL2); + val |= HFGxTR_EL2_nTPIDR2_EL0_MASK | + HFGxTR_EL2_nSMPRI_EL1_MASK; + write_sysreg_s(val, SYS_HFGRTR_EL2); + + val = read_sysreg_s(SYS_HFGWTR_EL2); + val |= HFGxTR_EL2_nTPIDR2_EL0_MASK | + HFGxTR_EL2_nSMPRI_EL1_MASK; + write_sysreg_s(val, SYS_HFGWTR_EL2); + } + cptr = CPTR_EL2_DEFAULT; if (vcpu_has_sve(vcpu) && (vcpu->arch.flags & KVM_ARM64_FP_ENABLED)) cptr |= CPTR_EL2_TZ; + if (cpus_have_final_cap(ARM64_SME)) + cptr &= ~CPTR_EL2_TSM; write_sysreg(cptr, cptr_el2); write_sysreg(__kvm_hyp_host_vector, vbar_el2); @@ -120,16 +150,13 @@ static void __hyp_vgic_restore_state(struct kvm_vcpu *vcpu) } } -/** +/* * Disable host events, enable guest events */ -static bool __pmu_switch_to_guest(struct kvm_cpu_context *host_ctxt) +#ifdef CONFIG_HW_PERF_EVENTS +static bool __pmu_switch_to_guest(struct kvm_vcpu *vcpu) { - struct kvm_host_data *host; - struct kvm_pmu_events *pmu; - - host = container_of(host_ctxt, struct kvm_host_data, host_ctxt); - pmu = &host->pmu_events; + struct kvm_pmu_events *pmu = &vcpu->arch.pmu.events; if (pmu->events_host) write_sysreg(pmu->events_host, pmcntenclr_el0); @@ -140,16 +167,12 @@ static bool __pmu_switch_to_guest(struct kvm_cpu_context *host_ctxt) return (pmu->events_host || pmu->events_guest); } -/** +/* * Disable guest events, enable host events */ -static void __pmu_switch_to_host(struct kvm_cpu_context *host_ctxt) +static void __pmu_switch_to_host(struct kvm_vcpu *vcpu) { - struct kvm_host_data *host; - struct kvm_pmu_events *pmu; - - host = container_of(host_ctxt, struct kvm_host_data, host_ctxt); - pmu = &host->pmu_events; + struct kvm_pmu_events *pmu = &vcpu->arch.pmu.events; if (pmu->events_guest) write_sysreg(pmu->events_guest, pmcntenclr_el0); @@ -157,8 +180,12 @@ static void __pmu_switch_to_host(struct kvm_cpu_context *host_ctxt) if (pmu->events_host) write_sysreg(pmu->events_host, pmcntenset_el0); } +#else +#define __pmu_switch_to_guest(v) ({ false; }) +#define __pmu_switch_to_host(v) do {} while (0) +#endif -/** +/* * Handler for protected VM MSR, MRS or System instruction execution in AArch64. * * Returns true if the hypervisor has handled the exit, and control should go @@ -175,23 +202,6 @@ static bool kvm_handle_pvm_sys64(struct kvm_vcpu *vcpu, u64 *exit_code) kvm_handle_pvm_sysreg(vcpu, exit_code)); } -/** - * Handler for protected floating-point and Advanced SIMD accesses. - * - * Returns true if the hypervisor has handled the exit, and control should go - * back to the guest, or false if it hasn't. - */ -static bool kvm_handle_pvm_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code) -{ - /* Linux guests assume support for floating-point and Advanced SIMD. */ - BUILD_BUG_ON(!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64PFR0_FP), - PVM_ID_AA64PFR0_ALLOW)); - BUILD_BUG_ON(!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64PFR0_ASIMD), - PVM_ID_AA64PFR0_ALLOW)); - - return kvm_hyp_handle_fpsimd(vcpu, exit_code); -} - static const exit_handler_fn hyp_exit_handlers[] = { [0 ... ESR_ELx_EC_MAX] = NULL, [ESR_ELx_EC_CP15_32] = kvm_hyp_handle_cp15_32, @@ -207,7 +217,7 @@ static const exit_handler_fn pvm_exit_handlers[] = { [0 ... ESR_ELx_EC_MAX] = NULL, [ESR_ELx_EC_SYS64] = kvm_handle_pvm_sys64, [ESR_ELx_EC_SVE] = kvm_handle_pvm_restricted, - [ESR_ELx_EC_FP_ASIMD] = kvm_handle_pvm_fpsimd, + [ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd, [ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low, [ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low, [ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth, @@ -274,7 +284,7 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu) host_ctxt->__hyp_running_vcpu = vcpu; guest_ctxt = &vcpu->arch.ctxt; - pmu_switch_needed = __pmu_switch_to_guest(host_ctxt); + pmu_switch_needed = __pmu_switch_to_guest(vcpu); __sysreg_save_state_nvhe(host_ctxt); /* @@ -336,7 +346,7 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu) __debug_restore_host_buffers_nvhe(vcpu); if (pmu_switch_needed) - __pmu_switch_to_host(host_ctxt); + __pmu_switch_to_host(vcpu); /* Returning to host will clear PSR.I, remask PMR if needed */ if (system_uses_irq_prio_masking()) @@ -347,7 +357,7 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu) return exit_code; } -void __noreturn hyp_panic(void) +asmlinkage void __noreturn hyp_panic(void) { u64 spsr = read_sysreg_el2(SYS_SPSR); u64 elr = read_sysreg_el2(SYS_ELR); @@ -369,6 +379,11 @@ void __noreturn hyp_panic(void) unreachable(); } +asmlinkage void __noreturn hyp_panic_bad_stack(void) +{ + hyp_panic(); +} + asmlinkage void kvm_unexpected_el2_exception(void) { return __kvm_unexpected_el2_exception(); |