Add mmio trace event support, currently generic mmio events
KVM_TRACE_MMIO_WRITE/xxx_READ/xx_READ_UNSATISFIED are added here.
Also vcpu id field is added for all kvm trace events, since perf
KVM tool parses vcpu id information for kvm entry event.
Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>
---
arch/loongarch/kvm/exit.c | 7 +++++++
arch/loongarch/kvm/trace.h | 20 ++++++++++++++------
2 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index ed1d89d53e2e..3c05aade0122 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/vmalloc.h>
+#include <trace/events/kvm.h>
#include <asm/fpu.h>
#include <asm/inst.h>
#include <asm/loongarch.h>
@@ -417,6 +418,8 @@ int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst)
vcpu->arch.io_gpr = rd;
run->mmio.is_write = 0;
vcpu->mmio_is_write = 0;
+ trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, run->mmio.len,
+ run->mmio.phys_addr, NULL);
} else {
kvm_err("Read not supported Inst=0x%08x @%lx BadVaddr:%#lx\n",
inst.word, vcpu->arch.pc, vcpu->arch.badv);
@@ -463,6 +466,8 @@ int kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run)
break;
}
+ trace_kvm_mmio(KVM_TRACE_MMIO_READ, run->mmio.len,
+ run->mmio.phys_addr, run->mmio.data);
return er;
}
@@ -564,6 +569,8 @@ int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst)
run->mmio.is_write = 1;
vcpu->mmio_needed = 1;
vcpu->mmio_is_write = 1;
+ trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, run->mmio.len,
+ run->mmio.phys_addr, data);
} else {
vcpu->arch.pc = curr_pc;
kvm_err("Write not supported Inst=0x%08x @%lx BadVaddr:%#lx\n",
diff --git a/arch/loongarch/kvm/trace.h b/arch/loongarch/kvm/trace.h
index c2484ad4cffa..1783397b1bc8 100644
--- a/arch/loongarch/kvm/trace.h
+++ b/arch/loongarch/kvm/trace.h
@@ -19,14 +19,16 @@ DECLARE_EVENT_CLASS(kvm_transition,
TP_PROTO(struct kvm_vcpu *vcpu),
TP_ARGS(vcpu),
TP_STRUCT__entry(
+ __field(unsigned int, vcpu_id)
__field(unsigned long, pc)
),
TP_fast_assign(
+ __entry->vcpu_id = vcpu->vcpu_id;
__entry->pc = vcpu->arch.pc;
),
- TP_printk("PC: 0x%08lx", __entry->pc)
+ TP_printk("vcpu %u PC: 0x%08lx", __entry->vcpu_id, __entry->pc)
);
DEFINE_EVENT(kvm_transition, kvm_enter,
@@ -54,19 +56,22 @@ DECLARE_EVENT_CLASS(kvm_exit,
TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
TP_ARGS(vcpu, reason),
TP_STRUCT__entry(
+ __field(unsigned int, vcpu_id)
__field(unsigned long, pc)
__field(unsigned int, reason)
),
TP_fast_assign(
+ __entry->vcpu_id = vcpu->vcpu_id;
__entry->pc = vcpu->arch.pc;
__entry->reason = reason;
),
- TP_printk("[%s]PC: 0x%08lx",
- __print_symbolic(__entry->reason,
- kvm_trace_symbol_exit_types),
- __entry->pc)
+ TP_printk("vcpu %u [%s] PC: 0x%08lx",
+ __entry->vcpu_id,
+ __print_symbolic(__entry->reason,
+ kvm_trace_symbol_exit_types),
+ __entry->pc)
);
DEFINE_EVENT(kvm_exit, kvm_exit_idle,
@@ -85,14 +90,17 @@ TRACE_EVENT(kvm_exit_gspr,
TP_PROTO(struct kvm_vcpu *vcpu, unsigned int inst_word),
TP_ARGS(vcpu, inst_word),
TP_STRUCT__entry(
+ __field(unsigned int, vcpu_id)
__field(unsigned int, inst_word)
),
TP_fast_assign(
+ __entry->vcpu_id = vcpu->vcpu_id;
__entry->inst_word = inst_word;
),
- TP_printk("Inst word: 0x%08x", __entry->inst_word)
+ TP_printk("vcpu %u Inst word: 0x%08x", __entry->vcpu_id,
+ __entry->inst_word)
);
#define KVM_TRACE_AUX_SAVE 0
base-commit: fec50db7033ea478773b159e0e2efb135270e3b7
