During the statedump, if the kernel has KVM compiled in, the exit reasons for VMX KVM are exported. 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.
Signed-off-by: Julien Desfossez <[email protected]> --- ltt-statedump.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-) diff --git a/ltt-statedump.c b/ltt-statedump.c index 06ade69..8917d2f 100644 --- a/ltt-statedump.c +++ b/ltt-statedump.c @@ -39,6 +39,10 @@ #include <linux/irq.h> #endif +#ifdef CONFIG_HAVE_KVM +#include <asm/vmx.h> +#endif + #define NB_PROC_CHUNK 20 /* @@ -85,6 +89,49 @@ 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_NMI_WINDOW, "nmi_window" }, + { EXIT_REASON_IO_INSTRUCTION, "io_instruction" }, + { EXIT_REASON_CR_ACCESS, "cr_access" }, + { EXIT_REASON_DR_ACCESS, "dr_access" }, + { EXIT_REASON_CPUID, "cpuid" }, + { EXIT_REASON_MSR_READ, "rdmsr" }, + { EXIT_REASON_MSR_WRITE, "wrmsr" }, + { EXIT_REASON_PENDING_INTERRUPT, "interrupt_window" }, + { EXIT_REASON_HLT, "halt" }, + { EXIT_REASON_INVLPG, "invlpg" }, + { EXIT_REASON_VMCALL, "hypercall" }, + { EXIT_REASON_TPR_BELOW_THRESHOLD, "tpr_below_thres" }, + { EXIT_REASON_APIC_ACCESS, "apic_access" }, + { EXIT_REASON_WBINVD, "wbinvd" }, + { EXIT_REASON_TASK_SWITCH, "task_switch" }, + { EXIT_REASON_EPT_VIOLATION, "ept_violation" }, + { -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 +421,7 @@ 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); -- 1.7.0.4 _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
