From: Mathieu Desnoyers Date: Mon, 22 Nov 2010 16:57:10 +0000 (-0500) Subject: Connect probes to KVM TRACE_EVENTS X-Git-Tag: v0.19.6~3 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=d4697afa16fdcef842db5ada47617d84888ab5e6;p=lttng-modules.git Connect probes to KVM TRACE_EVENTS This patch includes probes for the already defined KVM TRACE_EVENTS. Also it exports the VMX exit strings during the statedump, that way the analyzer can match the exit reason id with a more explicit representation. The new ltt_dump_enum_tables function aims to provide a generic way to export strings in the traces when necessary. [ edit: fixed trailing whitespaces ] Signed-off-by: Julien Desfossez Signed-off-by: Mathieu Desnoyers --- diff --git a/ltt-statedump.c b/ltt-statedump.c index 06ade69a..43cc2edd 100644 --- a/ltt-statedump.c +++ b/ltt-statedump.c @@ -39,6 +39,10 @@ #include #endif +#ifdef CONFIG_HAVE_KVM +#include +#endif + #define NB_PROC_CHUNK 20 /* @@ -85,6 +89,65 @@ enum lttng_process_status { LTTNG_DEAD = 7, }; +struct trace_enum_map { + long id; + const char *symbol; +}; + +#ifdef CONFIG_HAVE_KVM +static const struct trace_enum_map vmx_kvm_exit_enum[] = { + { EXIT_REASON_EXCEPTION_NMI, "exception" }, + { EXIT_REASON_EXTERNAL_INTERRUPT, "ext_irq" }, + { EXIT_REASON_TRIPLE_FAULT, "triple_fault" }, + { EXIT_REASON_PENDING_INTERRUPT, "interrupt_window" }, + { EXIT_REASON_NMI_WINDOW, "nmi_window" }, + { EXIT_REASON_TASK_SWITCH, "task_switch" }, + { EXIT_REASON_CPUID, "cpuid" }, + { EXIT_REASON_HLT, "halt" }, + { EXIT_REASON_INVLPG, "invlpg" }, + { EXIT_REASON_RDPMC, "rdpmc" }, + { EXIT_REASON_RDTSC, "rdtsc" }, + { EXIT_REASON_VMCALL, "hypercall" }, + { EXIT_REASON_VMCLEAR, "vmclear" }, + { EXIT_REASON_VMLAUNCH, "vmlaunch" }, + { EXIT_REASON_VMPTRLD, "vmprtld" }, + { EXIT_REASON_VMPTRST, "vmptrst" }, + { EXIT_REASON_VMREAD, "vmread" }, + { EXIT_REASON_VMRESUME, "vmresume" }, + { EXIT_REASON_VMWRITE, "vmwrite" }, + { EXIT_REASON_VMOFF, "vmoff" }, + { EXIT_REASON_VMON, "vmon" }, + { EXIT_REASON_CR_ACCESS, "cr_access" }, + { EXIT_REASON_DR_ACCESS, "dr_access" }, + { EXIT_REASON_IO_INSTRUCTION, "io_instruction" }, + { EXIT_REASON_MSR_READ, "rdmsr" }, + { EXIT_REASON_MSR_WRITE, "wrmsr" }, + { EXIT_REASON_MWAIT_INSTRUCTION, "mwait_instruction" }, + { EXIT_REASON_MONITOR_INSTRUCTION, "monitor_instruction" }, + { EXIT_REASON_PAUSE_INSTRUCTION, "pause_instruction" }, + { EXIT_REASON_MCE_DURING_VMENTRY, "mce_during_vmentry" }, + { EXIT_REASON_TPR_BELOW_THRESHOLD, "tpr_below_thres" }, + { EXIT_REASON_APIC_ACCESS, "apic_access" }, + { EXIT_REASON_EPT_VIOLATION, "ept_violation" }, + { EXIT_REASON_EPT_MISCONFIG, "epg_misconfig" }, + { EXIT_REASON_WBINVD, "wbinvd" }, + { -1, NULL } +}; +#endif /* CONFIG_HAVE_KVM */ + +static void ltt_dump_enum_tables(struct ltt_probe_private_data *call_data) +{ +#ifdef CONFIG_HAVE_KVM + int i; + /* KVM exit reasons for VMX */ + for(i = 0; vmx_kvm_exit_enum[i].symbol; i++) { + __trace_mark(0, enum_tables, vmx_kvm_exit, call_data, + "id %ld symbol %s", vmx_kvm_exit_enum[i].id, + vmx_kvm_exit_enum[i].symbol); + } +#endif /* CONFIG_HAVE_KVM */ +} + #ifdef CONFIG_INET static void ltt_enumerate_device(struct ltt_probe_private_data *call_data, struct net_device *dev) @@ -374,6 +437,7 @@ static int do_ltt_statedump(struct ltt_probe_private_data *call_data) ltt_dump_sys_call_table(call_data); ltt_dump_softirq_vec(call_data); ltt_dump_idt_table(call_data); + ltt_dump_enum_tables(call_data); mutex_lock(&statedump_cb_mutex); diff --git a/probes/Makefile b/probes/Makefile index d8f1c403..bb3aca7a 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 00000000..9a85f924 --- /dev/null +++ b/probes/kvm-trace.c @@ -0,0 +1,210 @@ +/* + * ltt/probes/kvm-trace.c + * + * KVM tracepoint probes. + * + * (C) Copyright 2010 - Julien Desfossez + * Dual LGPL v2.1/GPL v2 license. + * + */ + +#include +#include +#include +#include + +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", + 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");