diff options
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 10 | ||||
| -rw-r--r-- | arch/riscv/kvm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/riscv/kvm/main.c | 12 | ||||
| -rw-r--r-- | arch/riscv/kvm/vcpu.c | 7 |
4 files changed, 28 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 2e2254fd2a2a..35eab6e0f4ae 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -286,6 +286,16 @@ struct kvm_vcpu_arch { } sta; }; +/* + * Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event, + * arrived in guest context. For riscv, any event that arrives while a vCPU is + * loaded is considered to be "in guest". + */ +static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) +{ + return IS_ENABLED(CONFIG_GUEST_PERF_EVENTS) && !!vcpu; +} + static inline void kvm_arch_sync_events(struct kvm *kvm) {} #define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12 diff --git a/arch/riscv/kvm/Kconfig b/arch/riscv/kvm/Kconfig index 26d1727f0550..0c3cbb0915ff 100644 --- a/arch/riscv/kvm/Kconfig +++ b/arch/riscv/kvm/Kconfig @@ -32,6 +32,7 @@ config KVM select KVM_XFER_TO_GUEST_WORK select KVM_GENERIC_MMU_NOTIFIER select SCHED_INFO + select GUEST_PERF_EVENTS if PERF_EVENTS help Support hosting virtualized guest machines. diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c index f3427f6de608..5682e338ae6d 100644 --- a/arch/riscv/kvm/main.c +++ b/arch/riscv/kvm/main.c @@ -51,6 +51,12 @@ void kvm_arch_disable_virtualization_cpu(void) csr_write(CSR_HIDELEG, 0); } +static void kvm_riscv_teardown(void) +{ + kvm_riscv_aia_exit(); + kvm_unregister_perf_callbacks(); +} + static int __init riscv_kvm_init(void) { int rc; @@ -105,9 +111,11 @@ static int __init riscv_kvm_init(void) kvm_info("AIA available with %d guest external interrupts\n", kvm_riscv_aia_nr_hgei); + kvm_register_perf_callbacks(NULL); + rc = kvm_init(sizeof(struct kvm_vcpu), 0, THIS_MODULE); if (rc) { - kvm_riscv_aia_exit(); + kvm_riscv_teardown(); return rc; } @@ -117,7 +125,7 @@ module_init(riscv_kvm_init); static void __exit riscv_kvm_exit(void) { - kvm_riscv_aia_exit(); + kvm_riscv_teardown(); kvm_exit(); } diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 8d7d381737ee..e8ffb3456898 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -226,6 +226,13 @@ bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) return (vcpu->arch.guest_context.sstatus & SR_SPP) ? true : false; } +#ifdef CONFIG_GUEST_PERF_EVENTS +unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.guest_context.sepc; +} +#endif + vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) { return VM_FAULT_SIGBUS; |