KVM: convert custom marker based tracing to event traces

This allows use of the powerful ftrace infrastructure.

See Documentation/trace/ for usage information.

[avi, stephen: various build fixes]
[sheng: fix control register breakage]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 260 insertions, 0 deletions

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
new file mode 100644
index 000000000000..cd8c90db41a5
--- /dev/null
+++ b/arch/x86/kvm/trace.h
@@ -0,0 +1,260 @@
+#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_KVM_H
+
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM kvm
+#define TRACE_INCLUDE_PATH arch/x86/kvm
+#define TRACE_INCLUDE_FILE trace
+
+/*
+ * Tracepoint for guest mode entry.
+ */
+TRACE_EVENT(kvm_entry,
+        TP_PROTO(unsigned int vcpu_id),
+        TP_ARGS(vcpu_id),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   vcpu_id         )
+        ),
+
+        TP_fast_assign(
+                __entry->vcpu_id        = vcpu_id;
+        ),
+
+        TP_printk("vcpu %u", __entry->vcpu_id)
+);
+
+/*
+ * Tracepoint for hypercall.
+ */
+TRACE_EVENT(kvm_hypercall,
+        TP_PROTO(unsigned long nr, unsigned long a0, unsigned long a1,
+                 unsigned long a2, unsigned long a3),
+        TP_ARGS(nr, a0, a1, a2, a3),
+
+        TP_STRUCT__entry(
+                __field(        unsigned long,  nr              )
+                __field(        unsigned long,  a0              )
+                __field(        unsigned long,  a1              )
+                __field(        unsigned long,  a2              )
+                __field(        unsigned long,  a3              )
+        ),
+
+        TP_fast_assign(
+                __entry->nr             = nr;
+                __entry->a0             = a0;
+                __entry->a1             = a1;
+                __entry->a2             = a2;
+                __entry->a3             = a3;
+        ),
+
+        TP_printk("nr 0x%lx a0 0x%lx a1 0x%lx a2 0x%lx a3 0x%lx",
+                 __entry->nr, __entry->a0, __entry->a1,  __entry->a2,
+                 __entry->a3)
+);
+
+/*
+ * Tracepoint for PIO.
+ */
+TRACE_EVENT(kvm_pio,
+        TP_PROTO(unsigned int rw, unsigned int port, unsigned int size,
+                 unsigned int count),
+        TP_ARGS(rw, port, size, count),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   rw              )
+                __field(        unsigned int,   port            )
+                __field(        unsigned int,   size            )
+                __field(        unsigned int,   count           )
+        ),
+
+        TP_fast_assign(
+                __entry->rw             = rw;
+                __entry->port           = port;
+                __entry->size           = size;
+                __entry->count          = count;
+        ),
+
+        TP_printk("pio_%s at 0x%x size %d count %d",
+                  __entry->rw ? "write" : "read",
+                  __entry->port, __entry->size, __entry->count)
+);
+
+/*
+ * Tracepoint for cpuid.
+ */
+TRACE_EVENT(kvm_cpuid,
+        TP_PROTO(unsigned int function, unsigned long rax, unsigned long rbx,
+                 unsigned long rcx, unsigned long rdx),
+        TP_ARGS(function, rax, rbx, rcx, rdx),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   function        )
+                __field(        unsigned long,  rax             )
+                __field(        unsigned long,  rbx             )
+                __field(        unsigned long,  rcx             )
+                __field(        unsigned long,  rdx             )
+        ),
+
+        TP_fast_assign(
+                __entry->function       = function;
+                __entry->rax            = rax;
+                __entry->rbx            = rbx;
+                __entry->rcx            = rcx;
+                __entry->rdx            = rdx;
+        ),
+
+        TP_printk("func %x rax %lx rbx %lx rcx %lx rdx %lx",
+                  __entry->function, __entry->rax,
+                  __entry->rbx, __entry->rcx, __entry->rdx)
+);
+
+/*
+ * Tracepoint for apic access.
+ */
+TRACE_EVENT(kvm_apic,
+        TP_PROTO(unsigned int rw, unsigned int reg, unsigned int val),
+        TP_ARGS(rw, reg, val),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   rw              )
+                __field(        unsigned int,   reg             )
+                __field(        unsigned int,   val             )
+        ),
+
+        TP_fast_assign(
+                __entry->rw             = rw;
+                __entry->reg            = reg;
+                __entry->val            = val;
+        ),
+
+        TP_printk("apic_%s 0x%x = 0x%x",
+                  __entry->rw ? "write" : "read",
+                  __entry->reg, __entry->val)
+);
+
+#define trace_kvm_apic_read(reg, val)           trace_kvm_apic(0, reg, val)
+#define trace_kvm_apic_write(reg, val)          trace_kvm_apic(1, reg, val)
+
+/*
+ * Tracepoint for kvm guest exit:
+ */
+TRACE_EVENT(kvm_exit,
+        TP_PROTO(unsigned int exit_reason, unsigned long guest_rip),
+        TP_ARGS(exit_reason, guest_rip),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   exit_reason     )
+                __field(        unsigned long,  guest_rip       )
+        ),
+
+        TP_fast_assign(
+                __entry->exit_reason    = exit_reason;
+                __entry->guest_rip      = guest_rip;
+        ),
+
+        TP_printk("reason %s rip 0x%lx",
+                 ftrace_print_symbols_seq(p, __entry->exit_reason,
+                                          kvm_x86_ops->exit_reasons_str),
+                 __entry->guest_rip)
+);
+
+/*
+ * Tracepoint for kvm interrupt injection:
+ */
+TRACE_EVENT(kvm_inj_virq,
+        TP_PROTO(unsigned int irq),
+        TP_ARGS(irq),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   irq             )
+        ),
+
+        TP_fast_assign(
+                __entry->irq            = irq;
+        ),
+
+        TP_printk("irq %u", __entry->irq)
+);
+
+/*
+ * Tracepoint for page fault.
+ */
+TRACE_EVENT(kvm_page_fault,
+        TP_PROTO(unsigned long fault_address, unsigned int error_code),
+        TP_ARGS(fault_address, error_code),
+
+        TP_STRUCT__entry(
+                __field(        unsigned long,  fault_address   )
+                __field(        unsigned int,   error_code      )
+        ),
+
+        TP_fast_assign(
+                __entry->fault_address  = fault_address;
+                __entry->error_code     = error_code;
+        ),
+
+        TP_printk("address %lx error_code %x",
+                  __entry->fault_address, __entry->error_code)
+);
+
+/*
+ * Tracepoint for guest MSR access.
+ */
+TRACE_EVENT(kvm_msr,
+        TP_PROTO(unsigned int rw, unsigned int ecx, unsigned long data),
+        TP_ARGS(rw, ecx, data),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   rw              )
+                __field(        unsigned int,   ecx             )
+                __field(        unsigned long,  data            )
+        ),
+
+        TP_fast_assign(
+                __entry->rw             = rw;
+                __entry->ecx            = ecx;
+                __entry->data           = data;
+        ),
+
+        TP_printk("msr_%s %x = 0x%lx",
+                  __entry->rw ? "write" : "read",
+                  __entry->ecx, __entry->data)
+);
+
+#define trace_kvm_msr_read(ecx, data)           trace_kvm_msr(0, ecx, data)
+#define trace_kvm_msr_write(ecx, data)          trace_kvm_msr(1, ecx, data)
+
+/*
+ * Tracepoint for guest CR access.
+ */
+TRACE_EVENT(kvm_cr,
+        TP_PROTO(unsigned int rw, unsigned int cr, unsigned long val),
+        TP_ARGS(rw, cr, val),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   rw              )
+                __field(        unsigned int,   cr              )
+                __field(        unsigned long,  val             )
+        ),
+
+        TP_fast_assign(
+                __entry->rw             = rw;
+                __entry->cr             = cr;
+                __entry->val            = val;
+        ),
+
+        TP_printk("cr_%s %x = 0x%lx",
+                  __entry->rw ? "write" : "read",
+                  __entry->cr, __entry->val)
+);
+
+#define trace_kvm_cr_read(cr, val)              trace_kvm_cr(0, cr, val)
+#define trace_kvm_cr_write(cr, val)             trace_kvm_cr(1, cr, val)
+
+#endif /* _TRACE_KVM_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>