From 40c03ad5925855e47e4b6294323107b2b180ae3d Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Tue, 3 Dec 2013 14:09:33 +0100 Subject: tools lib traceevent: Add xen plugin Adding xen plugin. This plugin adds fields resolving for following tracepoint events: xen:xen_mc_entry xen:xen_mc_extend_args The diff of 'perf script' output generated by old and new code: (data was generated by 'perf record -e 'xen:*' ls') --- script.xen.old +++ script.xen.new - swapper 0 [002] 136.267492: xen:xen_mc_entry: [FAILED TO PARSE] op=3 nargs=2 args=ARRAY[18, 00, 00, 00, 00, 00, 00, 00, 00, e0, d4, 4b, 04, 88, ff, ff, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00] + swapper 0 [002] 136.267492: xen:xen_mc_entry: op 3(stack_switch) args [18, 0, 0, 0, 0, 0] - perf 1970 [008] 136.273319: xen:xen_mc_extend_args: [FAILED TO PARSE] op=1 args=16 res=1 + perf 1970 [008] 136.273319: xen:xen_mc_extend_args: extending op 1(mmu_update) by 16 bytes res ??? NOTE We still do not handle the 'sizeof' and fail to parse following xen tracepoints: xen:xen_mmu_set_pte xen:xen_mmu_set_pte_atomic xen:xen_mmu_set_domain_pte xen:xen_mmu_set_pte_at xen:xen_mmu_set_pmd xen:xen_mmu_set_pud xen:xen_mmu_set_pgd xen:xen_mmu_ptep_modify_prot_start xen:xen_mmu_ptep_modify_prot_commit Signed-off-by: Jiri Olsa Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jeremy Fitzhardinge Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1386076182-14484-20-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/plugin_xen.c | 130 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 tools/lib/traceevent/plugin_xen.c (limited to 'tools/lib/traceevent/plugin_xen.c') diff --git a/tools/lib/traceevent/plugin_xen.c b/tools/lib/traceevent/plugin_xen.c new file mode 100644 index 0000000..e779429 --- /dev/null +++ b/tools/lib/traceevent/plugin_xen.c @@ -0,0 +1,130 @@ +#include +#include +#include +#include "event-parse.h" + +#define __HYPERVISOR_set_trap_table 0 +#define __HYPERVISOR_mmu_update 1 +#define __HYPERVISOR_set_gdt 2 +#define __HYPERVISOR_stack_switch 3 +#define __HYPERVISOR_set_callbacks 4 +#define __HYPERVISOR_fpu_taskswitch 5 +#define __HYPERVISOR_sched_op_compat 6 +#define __HYPERVISOR_dom0_op 7 +#define __HYPERVISOR_set_debugreg 8 +#define __HYPERVISOR_get_debugreg 9 +#define __HYPERVISOR_update_descriptor 10 +#define __HYPERVISOR_memory_op 12 +#define __HYPERVISOR_multicall 13 +#define __HYPERVISOR_update_va_mapping 14 +#define __HYPERVISOR_set_timer_op 15 +#define __HYPERVISOR_event_channel_op_compat 16 +#define __HYPERVISOR_xen_version 17 +#define __HYPERVISOR_console_io 18 +#define __HYPERVISOR_physdev_op_compat 19 +#define __HYPERVISOR_grant_table_op 20 +#define __HYPERVISOR_vm_assist 21 +#define __HYPERVISOR_update_va_mapping_otherdomain 22 +#define __HYPERVISOR_iret 23 /* x86 only */ +#define __HYPERVISOR_vcpu_op 24 +#define __HYPERVISOR_set_segment_base 25 /* x86/64 only */ +#define __HYPERVISOR_mmuext_op 26 +#define __HYPERVISOR_acm_op 27 +#define __HYPERVISOR_nmi_op 28 +#define __HYPERVISOR_sched_op 29 +#define __HYPERVISOR_callback_op 30 +#define __HYPERVISOR_xenoprof_op 31 +#define __HYPERVISOR_event_channel_op 32 +#define __HYPERVISOR_physdev_op 33 +#define __HYPERVISOR_hvm_op 34 +#define __HYPERVISOR_tmem_op 38 + +/* Architecture-specific hypercall definitions. */ +#define __HYPERVISOR_arch_0 48 +#define __HYPERVISOR_arch_1 49 +#define __HYPERVISOR_arch_2 50 +#define __HYPERVISOR_arch_3 51 +#define __HYPERVISOR_arch_4 52 +#define __HYPERVISOR_arch_5 53 +#define __HYPERVISOR_arch_6 54 +#define __HYPERVISOR_arch_7 55 + +#define N(x) [__HYPERVISOR_##x] = "("#x")" +static const char *xen_hypercall_names[] = { + N(set_trap_table), + N(mmu_update), + N(set_gdt), + N(stack_switch), + N(set_callbacks), + N(fpu_taskswitch), + N(sched_op_compat), + N(dom0_op), + N(set_debugreg), + N(get_debugreg), + N(update_descriptor), + N(memory_op), + N(multicall), + N(update_va_mapping), + N(set_timer_op), + N(event_channel_op_compat), + N(xen_version), + N(console_io), + N(physdev_op_compat), + N(grant_table_op), + N(vm_assist), + N(update_va_mapping_otherdomain), + N(iret), + N(vcpu_op), + N(set_segment_base), + N(mmuext_op), + N(acm_op), + N(nmi_op), + N(sched_op), + N(callback_op), + N(xenoprof_op), + N(event_channel_op), + N(physdev_op), + N(hvm_op), + +/* Architecture-specific hypercall definitions. */ + N(arch_0), + N(arch_1), + N(arch_2), + N(arch_3), + N(arch_4), + N(arch_5), + N(arch_6), + N(arch_7), +}; +#undef N + +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) + +static const char *xen_hypercall_name(unsigned op) +{ + if (op < ARRAY_SIZE(xen_hypercall_names) && + xen_hypercall_names[op] != NULL) + return xen_hypercall_names[op]; + + return ""; +} + +unsigned long long process_xen_hypercall_name(struct trace_seq *s, + unsigned long long *args) +{ + unsigned int op = args[0]; + + trace_seq_printf(s, "%s", xen_hypercall_name(op)); + return 0; +} + +int PEVENT_PLUGIN_LOADER(struct pevent *pevent) +{ + pevent_register_print_function(pevent, + process_xen_hypercall_name, + PEVENT_FUNC_ARG_STRING, + "xen_hypercall_name", + PEVENT_FUNC_ARG_INT, + PEVENT_FUNC_ARG_VOID); + return 0; +} -- cgit v1.1 From bf6b3a95ff439b1dcd6151b3f38810f3cec1e319 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Thu, 16 Jan 2014 11:31:18 +0900 Subject: tools lib traceevent: Unregister handler when xen plugin is unloaded The function handler should be unregistered when the plugin is unloaded otherwise it'll try to access invalid memory. Signed-off-by: Namhyung Kim Reviewed-by: Jiri Olsa Acked-by: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1389839478-5887-13-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/plugin_xen.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tools/lib/traceevent/plugin_xen.c') diff --git a/tools/lib/traceevent/plugin_xen.c b/tools/lib/traceevent/plugin_xen.c index e779429..3a413ea 100644 --- a/tools/lib/traceevent/plugin_xen.c +++ b/tools/lib/traceevent/plugin_xen.c @@ -128,3 +128,9 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent) PEVENT_FUNC_ARG_VOID); return 0; } + +void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent) +{ + pevent_unregister_print_function(pevent, process_xen_hypercall_name, + "xen_hypercall_name"); +} -- cgit v1.1