diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-12-04 10:44:22 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-12-19 17:47:08 +0000 |
| commit | 599d79dcd18fa0f88ae15b7042c9d6b011a678b2 (patch) | |
| tree | c032a33528d627b77c1c170679f7f9a73b89ac58 /arch/arm64/kvm/trace.h | |
| parent | da6f16662a6eba3de0d1a39f3b8913d38754bb2b (diff) | |
| download | talos-op-linux-599d79dcd18fa0f88ae15b7042c9d6b011a678b2.tar.gz talos-op-linux-599d79dcd18fa0f88ae15b7042c9d6b011a678b2.zip | |
arm64: KVM: Add trapped system register access tracepoint
We're pretty blind when it comes to system register tracing,
and rely on the ESR value displayed by kvm_handle_sys, which
isn't much.
Instead, let's add an actual name to the sysreg entries, so that
we can finally print it as we're about to perform the access
itself.
The new tracepoint is conveniently called kvm_sys_access.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm/trace.h')
| -rw-r--r-- | arch/arm64/kvm/trace.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm64/kvm/trace.h b/arch/arm64/kvm/trace.h index 3b82fb1ddd09..eab91ad0effb 100644 --- a/arch/arm64/kvm/trace.h +++ b/arch/arm64/kvm/trace.h @@ -3,6 +3,7 @@ #define _TRACE_ARM64_KVM_H #include <linux/tracepoint.h> +#include "sys_regs.h" #undef TRACE_SYSTEM #define TRACE_SYSTEM kvm @@ -152,6 +153,40 @@ TRACE_EVENT(kvm_handle_sys_reg, TP_printk("HSR 0x%08lx", __entry->hsr) ); +TRACE_EVENT(kvm_sys_access, + TP_PROTO(unsigned long vcpu_pc, struct sys_reg_params *params, const struct sys_reg_desc *reg), + TP_ARGS(vcpu_pc, params, reg), + + TP_STRUCT__entry( + __field(unsigned long, vcpu_pc) + __field(bool, is_write) + __field(const char *, name) + __field(u8, Op0) + __field(u8, Op1) + __field(u8, CRn) + __field(u8, CRm) + __field(u8, Op2) + ), + + TP_fast_assign( + __entry->vcpu_pc = vcpu_pc; + __entry->is_write = params->is_write; + __entry->name = reg->name; + __entry->Op0 = reg->Op0; + __entry->Op0 = reg->Op0; + __entry->Op1 = reg->Op1; + __entry->CRn = reg->CRn; + __entry->CRm = reg->CRm; + __entry->Op2 = reg->Op2; + ), + + TP_printk("PC: %lx %s (%d,%d,%d,%d,%d) %s", + __entry->vcpu_pc, __entry->name ?: "UNKN", + __entry->Op0, __entry->Op1, __entry->CRn, + __entry->CRm, __entry->Op2, + __entry->is_write ? "write" : "read") +); + TRACE_EVENT(kvm_set_guest_debug, TP_PROTO(struct kvm_vcpu *vcpu, __u32 guest_debug), TP_ARGS(vcpu, guest_debug), |
