diff options
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_emulate.h | 5 | ||||
| -rw-r--r-- | arch/arm64/kvm/handle_exit.c | 13 | ||||
| -rw-r--r-- | arch/arm64/kvm/trace.h | 55 |
4 files changed, 73 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8afb863f5a9e..3da2d3acec0b 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -257,4 +257,6 @@ #define ESR_EL2_EC_WFI_ISS_WFE (1 << 0) +#define ESR_EL2_HVC_IMM_MASK ((1UL << 16) - 1) + #endif /* __ARM64_KVM_ARM_H__ */ diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 8127e45e2637..a6fa2d2cd41c 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -126,6 +126,11 @@ static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; } +static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) +{ + return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_HVC_IMM_MASK; +} + static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) { return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV); diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 34b8bd0711e9..6a7eb3ce7027 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -26,12 +26,18 @@ #include <asm/kvm_mmu.h> #include <asm/kvm_psci.h> +#define CREATE_TRACE_POINTS +#include "trace.h" + typedef int (*exit_handle_fn)(struct kvm_vcpu *, struct kvm_run *); static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run) { int ret; + trace_kvm_hvc_arm64(*vcpu_pc(vcpu), *vcpu_reg(vcpu, 0), + kvm_vcpu_hvc_get_imm(vcpu)); + ret = kvm_psci_call(vcpu); if (ret < 0) { kvm_inject_undefined(vcpu); @@ -61,10 +67,13 @@ static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run) */ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) { - if (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EC_WFI_ISS_WFE) + if (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EC_WFI_ISS_WFE) { + trace_kvm_wfx_arm64(*vcpu_pc(vcpu), true); kvm_vcpu_on_spin(vcpu); - else + } else { + trace_kvm_wfx_arm64(*vcpu_pc(vcpu), false); kvm_vcpu_block(vcpu); + } kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); diff --git a/arch/arm64/kvm/trace.h b/arch/arm64/kvm/trace.h new file mode 100644 index 000000000000..157416e963f2 --- /dev/null +++ b/arch/arm64/kvm/trace.h @@ -0,0 +1,55 @@ +#if !defined(_TRACE_ARM64_KVM_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_ARM64_KVM_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM kvm + +TRACE_EVENT(kvm_wfx_arm64, + TP_PROTO(unsigned long vcpu_pc, bool is_wfe), + TP_ARGS(vcpu_pc, is_wfe), + + TP_STRUCT__entry( + __field(unsigned long, vcpu_pc) + __field(bool, is_wfe) + ), + + TP_fast_assign( + __entry->vcpu_pc = vcpu_pc; + __entry->is_wfe = is_wfe; + ), + + TP_printk("guest executed wf%c at: 0x%08lx", + __entry->is_wfe ? 'e' : 'i', __entry->vcpu_pc) +); + +TRACE_EVENT(kvm_hvc_arm64, + TP_PROTO(unsigned long vcpu_pc, unsigned long r0, unsigned long imm), + TP_ARGS(vcpu_pc, r0, imm), + + TP_STRUCT__entry( + __field(unsigned long, vcpu_pc) + __field(unsigned long, r0) + __field(unsigned long, imm) + ), + + TP_fast_assign( + __entry->vcpu_pc = vcpu_pc; + __entry->r0 = r0; + __entry->imm = imm; + ), + + TP_printk("HVC at 0x%08lx (r0: 0x%08lx, imm: 0x%lx)", + __entry->vcpu_pc, __entry->r0, __entry->imm) +); + +#endif /* _TRACE_ARM64_KVM_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace + +/* This part must be outside protection */ +#include <trace/define_trace.h> |