![Marc Zyngier](/assets/img/avatar_default.png)
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>
217 lines
4.7 KiB
C
217 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#if !defined(_TRACE_ARM64_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_ARM64_KVM_H
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#include <linux/tracepoint.h>
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#include "sys_regs.h"
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kvm
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TRACE_EVENT(kvm_wfx_arm64,
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TP_PROTO(unsigned long vcpu_pc, bool is_wfe),
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TP_ARGS(vcpu_pc, is_wfe),
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TP_STRUCT__entry(
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__field(unsigned long, vcpu_pc)
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__field(bool, is_wfe)
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->is_wfe = is_wfe;
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),
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TP_printk("guest executed wf%c at: 0x%08lx",
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__entry->is_wfe ? 'e' : 'i', __entry->vcpu_pc)
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);
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TRACE_EVENT(kvm_hvc_arm64,
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TP_PROTO(unsigned long vcpu_pc, unsigned long r0, unsigned long imm),
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TP_ARGS(vcpu_pc, r0, imm),
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TP_STRUCT__entry(
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__field(unsigned long, vcpu_pc)
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__field(unsigned long, r0)
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__field(unsigned long, imm)
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->r0 = r0;
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__entry->imm = imm;
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),
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TP_printk("HVC at 0x%08lx (r0: 0x%08lx, imm: 0x%lx)",
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__entry->vcpu_pc, __entry->r0, __entry->imm)
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);
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TRACE_EVENT(kvm_arm_setup_debug,
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TP_PROTO(struct kvm_vcpu *vcpu, __u32 guest_debug),
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TP_ARGS(vcpu, guest_debug),
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TP_STRUCT__entry(
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__field(struct kvm_vcpu *, vcpu)
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__field(__u32, guest_debug)
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),
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TP_fast_assign(
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__entry->vcpu = vcpu;
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__entry->guest_debug = guest_debug;
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),
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TP_printk("vcpu: %p, flags: 0x%08x", __entry->vcpu, __entry->guest_debug)
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);
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TRACE_EVENT(kvm_arm_clear_debug,
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TP_PROTO(__u32 guest_debug),
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TP_ARGS(guest_debug),
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TP_STRUCT__entry(
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__field(__u32, guest_debug)
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),
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TP_fast_assign(
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__entry->guest_debug = guest_debug;
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),
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TP_printk("flags: 0x%08x", __entry->guest_debug)
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);
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TRACE_EVENT(kvm_arm_set_dreg32,
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TP_PROTO(const char *name, __u32 value),
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TP_ARGS(name, value),
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TP_STRUCT__entry(
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__field(const char *, name)
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__field(__u32, value)
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),
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TP_fast_assign(
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__entry->name = name;
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__entry->value = value;
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),
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TP_printk("%s: 0x%08x", __entry->name, __entry->value)
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);
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TRACE_DEFINE_SIZEOF(__u64);
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TRACE_EVENT(kvm_arm_set_regset,
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TP_PROTO(const char *type, int len, __u64 *control, __u64 *value),
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TP_ARGS(type, len, control, value),
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TP_STRUCT__entry(
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__field(const char *, name)
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__field(int, len)
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__array(u64, ctrls, 16)
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__array(u64, values, 16)
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),
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TP_fast_assign(
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__entry->name = type;
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__entry->len = len;
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memcpy(__entry->ctrls, control, len << 3);
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memcpy(__entry->values, value, len << 3);
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),
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TP_printk("%d %s CTRL:%s VALUE:%s", __entry->len, __entry->name,
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__print_array(__entry->ctrls, __entry->len, sizeof(__u64)),
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__print_array(__entry->values, __entry->len, sizeof(__u64)))
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);
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TRACE_EVENT(trap_reg,
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TP_PROTO(const char *fn, int reg, bool is_write, u64 write_value),
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TP_ARGS(fn, reg, is_write, write_value),
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TP_STRUCT__entry(
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__field(const char *, fn)
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__field(int, reg)
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__field(bool, is_write)
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__field(u64, write_value)
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),
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TP_fast_assign(
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__entry->fn = fn;
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__entry->reg = reg;
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__entry->is_write = is_write;
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__entry->write_value = write_value;
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),
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TP_printk("%s %s reg %d (0x%08llx)", __entry->fn, __entry->is_write?"write to":"read from", __entry->reg, __entry->write_value)
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);
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TRACE_EVENT(kvm_handle_sys_reg,
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TP_PROTO(unsigned long hsr),
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TP_ARGS(hsr),
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TP_STRUCT__entry(
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__field(unsigned long, hsr)
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),
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TP_fast_assign(
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__entry->hsr = hsr;
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),
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TP_printk("HSR 0x%08lx", __entry->hsr)
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);
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TRACE_EVENT(kvm_sys_access,
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TP_PROTO(unsigned long vcpu_pc, struct sys_reg_params *params, const struct sys_reg_desc *reg),
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TP_ARGS(vcpu_pc, params, reg),
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TP_STRUCT__entry(
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__field(unsigned long, vcpu_pc)
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__field(bool, is_write)
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__field(const char *, name)
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__field(u8, Op0)
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__field(u8, Op1)
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__field(u8, CRn)
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__field(u8, CRm)
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__field(u8, Op2)
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->is_write = params->is_write;
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__entry->name = reg->name;
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__entry->Op0 = reg->Op0;
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__entry->Op0 = reg->Op0;
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__entry->Op1 = reg->Op1;
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__entry->CRn = reg->CRn;
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__entry->CRm = reg->CRm;
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__entry->Op2 = reg->Op2;
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),
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TP_printk("PC: %lx %s (%d,%d,%d,%d,%d) %s",
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__entry->vcpu_pc, __entry->name ?: "UNKN",
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__entry->Op0, __entry->Op1, __entry->CRn,
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__entry->CRm, __entry->Op2,
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__entry->is_write ? "write" : "read")
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);
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TRACE_EVENT(kvm_set_guest_debug,
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TP_PROTO(struct kvm_vcpu *vcpu, __u32 guest_debug),
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TP_ARGS(vcpu, guest_debug),
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TP_STRUCT__entry(
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__field(struct kvm_vcpu *, vcpu)
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__field(__u32, guest_debug)
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),
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TP_fast_assign(
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__entry->vcpu = vcpu;
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__entry->guest_debug = guest_debug;
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),
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TP_printk("vcpu: %p, flags: 0x%08x", __entry->vcpu, __entry->guest_debug)
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);
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#endif /* _TRACE_ARM64_KVM_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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