[ltt-dev] [LTTNG-MODULES PATCH] Connect probes to KVM TRACE_EVENTs
Julien Desfossez
julien.desfossez at polymtl.ca
Fri Sep 10 07:40:11 EDT 2010
Signed-off-by: Julien Desfossez <julien.desfossez at polymtl.ca>
---
probes/Makefile | 6 ++
probes/kvm-trace.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 217 insertions(+), 0 deletions(-)
create mode 100644 probes/kvm-trace.c
diff --git a/probes/Makefile b/probes/Makefile
index d8f1c40..bb3aca7 100644
--- a/probes/Makefile
+++ b/probes/Makefile
@@ -44,4 +44,10 @@ endif
obj-m += block-trace.o
endif
+ifdef CONFIG_KVM
+ifdef CONFIG_FTRACE
+CFLAGS_REMOVE_kvm-trace.o = -pg
+endif
+obj-m += kvm-trace.o
+endif
diff --git a/probes/kvm-trace.c b/probes/kvm-trace.c
new file mode 100644
index 0000000..f8144fa
--- /dev/null
+++ b/probes/kvm-trace.c
@@ -0,0 +1,211 @@
+/*
+ * ltt/probes/kvm-trace.c
+ *
+ * KVM tracepoint probes.
+ *
+ * (C) Copyright 2010 - Julien Desfossez <julien.desfossez at polymtl.ca>
+ * Dual LGPL v2.1/GPL v2 license.
+ *
+ */
+
+#include <linux/module.h>
+#include <asm/vmx.h>
+#include <linux/kvm_host.h>
+#include <kvm-trace.h>
+
+void probe_kvm_entry(void *_data, unsigned int vcpu_id)
+{
+ trace_mark_tp(kvm, kvm_entry, kvm_entry,
+ probe_kvm_entry,
+ "vcpu %u",
+ vcpu_id);
+}
+
+void probe_kvm_hypercall(void *_data, unsigned long nr, unsigned long a0,
+ unsigned long a1, unsigned long a2, unsigned long a3)
+{
+ trace_mark_tp(kvm, kvm_hypercall, kvm_hypercall,
+ probe_kvm_hypercall,
+ "nr 0x%lx a0 0x%lx a1 0x%lx a2 0x%lx a3 0x%lx",
+ nr, a0, a1, a2, a3);
+}
+
+void probe_kvm_pio(void *_data, unsigned int rw, unsigned int port,
+ unsigned int size, unsigned int count)
+{
+ trace_mark_tp(kvm, kvm_pio, kvm_pio,
+ probe_kvm_pio,
+ "pio_%s at 0x%x size %d count %d",
+ rw ? "write" : "read",
+ port, size, count);
+}
+
+void probe_kvm_cpuid(void *_data, unsigned int function, unsigned long rax,
+ unsigned long rbx, unsigned long rcx, unsigned long rdx)
+{
+ trace_mark_tp(kvm, kvm_cpuid, kvm_cpuid,
+ probe_kvm_cpuid,
+ "func %x rax %lx rbx %lx rcx %lx rdx %lx",
+ function, rax, rbx, rcx, rdx);
+}
+
+void probe_kvm_apic (void *_data, unsigned int rw, unsigned int reg,
+ unsigned int val)
+{
+ trace_mark_tp(kvm, kvm_apic, kvm_apic,
+ probe_kvm_apic,
+ "apic_%s reg %d = 0x%x",
+ rw ? "write" : "read",
+ reg, val);
+}
+
+void probe_kvm_exit(void *_data, unsigned int exit_reason, struct kvm_vcpu *vcpu)
+{
+ trace_mark_tp(kvm, kvm_exit, kvm_exit,
+ probe_kvm_exit,
+ "reason %d",
+ /* FIXME : kvm_rip_read(vcpu) */
+ exit_reason);
+}
+
+void probe_kvm_inj_virq(void *_data, unsigned int irq)
+{
+ trace_mark_tp(kvm, kvm_inj_virq, kvm_inj_virq,
+ probe_kvm_inj_virq,
+ "irq %u", irq);
+}
+
+void probe_kvm_page_fault(void *_data, unsigned long fault_address,
+ unsigned int error_code)
+{
+ trace_mark_tp(kvm, kvm_page_fault, kvm_page_fault,
+ probe_kvm_page_fault,
+ "address %lx error_code %x",
+ fault_address, error_code);
+}
+
+void probe_kvm_msr(void *_data, unsigned int rw, __u32 ecx, __u64 data, bool exception)
+{
+ trace_mark_tp(kvm, kvm_msr, kvm_msr,
+ probe_kvm_msr,
+ "msr_%s %x = 0x%llx",
+ rw ? "read" : "write",
+ ecx, data);
+}
+
+void probe_kvm_cr(void *_data, unsigned int rw, unsigned int cr, unsigned long val)
+{
+ trace_mark_tp(kvm, kvm_cr, kvm_cr,
+ probe_kvm_cr,
+ "cr_%s %x = 0x%lx",
+ rw ? "read" : "write",
+ cr, val);
+}
+
+void probe_kvm_pic_set_irq(void *_data, __u8 chip, __u8 pin, __u8 elcr,
+ __u8 imr, bool coalesced)
+{
+ trace_mark_tp(kvm, kvm_pic_set_irq, kvm_pic_set_irq,
+ probe_kvm_pic_set_irq,
+ "chip %u pin %u (%s%s)%s",
+ chip, pin,
+ (elcr & (1 << pin)) ? "level":"edge",
+ (imr & (1 << pin)) ? "|masked":"",
+ coalesced ? " (coalesced)" : "");
+}
+
+void probe_kvm_apic_ipi(void *_data, __u32 icr_low, __u32 dest_id)
+{
+ trace_mark_tp(kvm, kvm_apic_ipi, kvm_apic_ipi,
+ probe_kvm_apic_ipi,
+ "dst %x vec %u (%x|%s|%s|%s|%x)",
+ dest_id, icr_low,
+ icr_low >> 8 & 0x7,
+ (icr_low & (1<<11)) ? "logical" : "physical",
+ (icr_low & (1<<14)) ? "assert" : "de-assert",
+ (icr_low & (1<<15)) ? "level" : "edge",
+ icr_low >> 18 & 0x3);
+}
+
+void probe_kvm_apic_accept_irq(void *_data, __u32 apicid, __u16 dm, __u8 tm,
+ __u8 vec, bool coalesced)
+{
+ trace_mark_tp(kvm, kvm_apic_accept_irq, kvm_apic_accept_irq,
+ probe_kvm_apic_accept_irq,
+ "apicid %x vec %u (%x|%s)%s",
+ apicid, vec, dm >> 8 & 0x7,
+ tm ? "level" : "edge",
+ coalesced ? " (coalesced)" : "");
+}
+
+void probe_kvm_nested_vmrun(void *_data, __u64 rip, __u64 vmcb, __u64 nested_rip,
+ __u32 int_ctl, __u32 event_inj, bool npt)
+{
+ trace_mark_tp(kvm, kvm_nested_vmrun, kvm_nested_vmrun,
+ probe_kvm_nested_vmrun,
+ "rip 0x%Lx vmcb 0x%Lx nrip 0x%Lx int_ctl 0x%x "
+ "event_inj 0x%x npt %s",
+ (unsigned long long)rip,
+ (unsigned long long)vmcb,
+ (unsigned long long)nested_rip,
+ int_ctl, event_inj,
+ npt ? "on" : "off");
+}
+
+void probe_kvm_nested_vmexit(void *_data, __u64 rip, __u32 exit_code,
+ __u64 exit_info1, __u64 exit_info2,
+ __u32 exit_int_info, __u32 exit_int_info_err)
+{
+ trace_mark_tp(kvm, kvm_nested_vmexit, kvm_nested_vmexit,
+ probe_kvm_nested_vmexit,
+ "rip 0x%Lx reason %d ext_inf1 0x%Lx "
+ "ext_inf2 0x%Lx ext_int 0x%x ext_int_err 0x%x",
+ (unsigned long long)rip,
+ exit_code,
+ (unsigned long long)exit_info1,
+ (unsigned long long)exit_info2,
+ exit_int_info, exit_int_info_err);
+}
+
+void probe_kvm_nested_vmexit_inject(void *_data, __u32 exit_code,
+ __u64 exit_info1, __u64 exit_info2,
+ __u32 exit_int_info, __u32 exit_int_info_err)
+{
+ trace_mark_tp(kvm, kvm_nested_vmexit_inject, kvm_nested_vmexit_inject,
+ probe_kvm_nested_vmexit_inject,
+ "reason %d ext_inf1 0x%Lx "
+ "ext_inf2 0x%Lx ext_int 0x%x ext_int_err 0x%x",
+ exit_code,
+ (unsigned long long)exit_info1,
+ (unsigned long long)exit_info2,
+ exit_int_info, exit_int_info_err);
+}
+
+void probe_kvm_nested_intr_vmexit(void *_data, __u64 rip)
+{
+ trace_mark_tp(kvm, kvm_nested_intr_vmexit, kvm_nested_intr_vmexit,
+ probe_kvm_nested_intr_vmexit,
+ "rip 0x%Lx", (unsigned long long)rip );
+}
+
+void probe_kvm_invlpga(void *_data, __u64 rip, int asid, u64 address)
+{
+ trace_mark_tp(kvm, kvm_invlpga, kvm_invlpga,
+ probe_kvm_invlpga,
+ "rip 0x%Lx asid %d address 0x%Lx",
+ (unsigned long long)rip,
+ asid,
+ (unsigned long long)address);
+}
+
+void probe_kvm_skinit(void *_data, __u64 rip, __u32 slb)
+{
+ trace_mark_tp(kvm, kvm_skinit, kvm_skinit,
+ probe_kvm_skinit,
+ "rip 0x%Lx slb 0x%x",
+ (unsigned long long)rip, slb);
+}
+
+MODULE_LICENSE("GPL and additional rights");
+MODULE_AUTHOR("Julien Desfossez");
+MODULE_DESCRIPTION("KVM Tracepoint Probes");
--
1.7.0.4
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