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linux/arch/arm64/kvm/trace.h
Marc Zyngier 599d79dcd1 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>
2018-12-19 17:47:08 +00:00

217 lines
4.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#if !defined(_TRACE_ARM64_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_ARM64_KVM_H
#include <linux/tracepoint.h>
#include "sys_regs.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)
);
TRACE_EVENT(kvm_arm_setup_debug,
TP_PROTO(struct kvm_vcpu *vcpu, __u32 guest_debug),
TP_ARGS(vcpu, guest_debug),
TP_STRUCT__entry(
__field(struct kvm_vcpu *, vcpu)
__field(__u32, guest_debug)
),
TP_fast_assign(
__entry->vcpu = vcpu;
__entry->guest_debug = guest_debug;
),
TP_printk("vcpu: %p, flags: 0x%08x", __entry->vcpu, __entry->guest_debug)
);
TRACE_EVENT(kvm_arm_clear_debug,
TP_PROTO(__u32 guest_debug),
TP_ARGS(guest_debug),
TP_STRUCT__entry(
__field(__u32, guest_debug)
),
TP_fast_assign(
__entry->guest_debug = guest_debug;
),
TP_printk("flags: 0x%08x", __entry->guest_debug)
);
TRACE_EVENT(kvm_arm_set_dreg32,
TP_PROTO(const char *name, __u32 value),
TP_ARGS(name, value),
TP_STRUCT__entry(
__field(const char *, name)
__field(__u32, value)
),
TP_fast_assign(
__entry->name = name;
__entry->value = value;
),
TP_printk("%s: 0x%08x", __entry->name, __entry->value)
);
TRACE_DEFINE_SIZEOF(__u64);
TRACE_EVENT(kvm_arm_set_regset,
TP_PROTO(const char *type, int len, __u64 *control, __u64 *value),
TP_ARGS(type, len, control, value),
TP_STRUCT__entry(
__field(const char *, name)
__field(int, len)
__array(u64, ctrls, 16)
__array(u64, values, 16)
),
TP_fast_assign(
__entry->name = type;
__entry->len = len;
memcpy(__entry->ctrls, control, len << 3);
memcpy(__entry->values, value, len << 3);
),
TP_printk("%d %s CTRL:%s VALUE:%s", __entry->len, __entry->name,
__print_array(__entry->ctrls, __entry->len, sizeof(__u64)),
__print_array(__entry->values, __entry->len, sizeof(__u64)))
);
TRACE_EVENT(trap_reg,
TP_PROTO(const char *fn, int reg, bool is_write, u64 write_value),
TP_ARGS(fn, reg, is_write, write_value),
TP_STRUCT__entry(
__field(const char *, fn)
__field(int, reg)
__field(bool, is_write)
__field(u64, write_value)
),
TP_fast_assign(
__entry->fn = fn;
__entry->reg = reg;
__entry->is_write = is_write;
__entry->write_value = write_value;
),
TP_printk("%s %s reg %d (0x%08llx)", __entry->fn, __entry->is_write?"write to":"read from", __entry->reg, __entry->write_value)
);
TRACE_EVENT(kvm_handle_sys_reg,
TP_PROTO(unsigned long hsr),
TP_ARGS(hsr),
TP_STRUCT__entry(
__field(unsigned long, hsr)
),
TP_fast_assign(
__entry->hsr = hsr;
),
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),
TP_STRUCT__entry(
__field(struct kvm_vcpu *, vcpu)
__field(__u32, guest_debug)
),
TP_fast_assign(
__entry->vcpu = vcpu;
__entry->guest_debug = guest_debug;
),
TP_printk("vcpu: %p, flags: 0x%08x", __entry->vcpu, __entry->guest_debug)
);
#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>