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LoongArch: KVM: Add mmio trace events support

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Add mmio trace events 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@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2024-05-06 22:00:47 +08:00 committed by Huacai Chen
parent 163e9fc695
commit 7b7e584f90
2 changed files with 22 additions and 6 deletions
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8
arch/loongarch/kvm/exit.c
View File

@ -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>
@ -441,6 +442,8 @@ 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);
@ -487,6 +490,9 @@ 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;
}
@ -588,6 +594,8 @@ 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",

20
arch/loongarch/kvm/trace.h
View File

@ -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