tools lib traceevent: Add kvm plugin
Backporting kvm plugin.
Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb):
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
This plugin adds field resolving functions for following
tracepoint events:
kvm:kvm_exit
kvm:kvm_emulate_insn
kvm:kvm_nested_vmexit
kvm:kvm_nested_vmexit_inject
kvmmmu:kvm_mmu_get_page
kvmmmu:kvm_mmu_sync_page
kvmmmu:kvm_mmu_unsync_page
kvmmmu:kvm_mmu_zap_page
kvmmmu:kvm_mmu_prepare_zap_page
The diff of 'perf script' output generated by old and new code:
(data was generated by 'perf record -e 'kvm:*,kvmmmu:*' -a')
--- script.kvm.old
+++ script.kvm.new
qemu-system-x86 17414 [000] 6868.995053: kvm:kvm_exit: reason EPT_VIOLATION rip 0xfff0 info 184 0
qemu-system-x86 17414 [000] 6868.995109: kvm:kvm_emulate_insn: f0000:c46b:e4 71 (real)
- qemu-system-x86 3006 [002] 10562.079422: kvmmmu:kvm_mmu_get_page: [FAILED TO PARSE] mmu_valid_gen=0x2 gfn=0 role=122884 root_count=0 unsync=0 created=1
+ qemu-system-x86 3006 [002] 10562.079422: kvmmmu:kvm_mmu_get_page: new sp gfn 0 0/4 q0 direct --- !pge !nxe root 0 sync
- qemu-system-x86 3006 [002] 10562.080502: kvmmmu:kvm_mmu_prepare_zap_page: [FAILED TO PARSE] mmu_valid_gen=0x2 gfn=0 role=122884 root_count=1 unsync=0
+ qemu-system-x86 3006 [002] 10562.080502: kvmmmu:kvm_mmu_prepare_zap_page: 0/4 q0 direct --- !pge !nxe root 1 sync
qemu-system-x86 3290 [002] 10708.755312: kvmmmu:fast_page_fault: [FAILED TO PARSE] vcpu_id=0 gva=4094486080 error_code=3 sptep=0xffff88019f1e3670 old_spte=336391285 new_spte=336391287 retry=1
- insmod 2576 [001] 781.731666: kvmmmu:kvm_mmu_sync_page: [FAILED TO PARSE] mmu_valid_gen=0x1 gfn=2 role=24624 root_count=10 unsync=1
+ insmod 2576 [001] 781.731666: kvmmmu:kvm_mmu_sync_page: 3/0 q0 --- !pge !nxe root 10 unsync
- insmod 2576 [001] 781.731668: kvmmmu:kvm_mmu_unsync_page: [FAILED TO PARSE] mmu_valid_gen=0x1 gfn=2 role=24624 root_count=10 unsync=1
+ insmod 2576 [001] 781.731668: kvmmmu:kvm_mmu_unsync_page: 3/0 q0 --- !pge !nxe root 10 unsync
Note:
- kvm_mmu_zap_page is replaced by kvm_mmu_prepare_zap_page
in current kernel, keeping it for backward compatibility
- some of the tracepoints keep the same output even with
the plugin handling: kvm:kvm_exit, kvm:kvm_emulate_insn
- the 'kvmmmu:fast_page_fault' is still broken because of
missing is_writable_pte function and is fixed in another patch
- ommited following tracepoints from backport because
the output was buggy
kvm:kvm_nested_vmexit
kvm:kvm_nested_vmexit_inject
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-16-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
Arnaldo Carvalho de Melo
parent
f825628840
commit
35d79f9ff8
@ -215,6 +215,7 @@ PEVENT_LIB_OBJS += kbuffer-parse.o
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PLUGIN_OBJS = plugin_jbd2.o
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PLUGIN_OBJS += plugin_hrtimer.o
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PLUGIN_OBJS += plugin_kmem.o
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PLUGIN_OBJS += plugin_kvm.o
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PLUGINS := $(PLUGIN_OBJS:.o=.so)
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419
tools/lib/traceevent/plugin_kvm.c
Normal file
419
tools/lib/traceevent/plugin_kvm.c
Normal file
@ -0,0 +1,419 @@
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/*
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* Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "event-parse.h"
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#ifdef HAVE_UDIS86
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#include <udis86.h>
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static ud_t ud;
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static void init_disassembler(void)
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{
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ud_init(&ud);
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ud_set_syntax(&ud, UD_SYN_ATT);
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}
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static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
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int cr0_pe, int eflags_vm,
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int cs_d, int cs_l)
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{
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int mode;
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if (!cr0_pe)
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mode = 16;
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else if (eflags_vm)
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mode = 16;
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else if (cs_l)
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mode = 64;
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else if (cs_d)
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mode = 32;
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else
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mode = 16;
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ud_set_pc(&ud, rip);
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ud_set_mode(&ud, mode);
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ud_set_input_buffer(&ud, insn, len);
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ud_disassemble(&ud);
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return ud_insn_asm(&ud);
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}
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#else
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static void init_disassembler(void)
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{
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}
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static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
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int cr0_pe, int eflags_vm,
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int cs_d, int cs_l)
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{
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static char out[15*3+1];
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int i;
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for (i = 0; i < len; ++i)
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sprintf(out + i * 3, "%02x ", insn[i]);
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out[len*3-1] = '\0';
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return out;
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}
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#endif
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#define VMX_EXIT_REASONS \
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_ER(EXCEPTION_NMI, 0) \
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_ER(EXTERNAL_INTERRUPT, 1) \
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_ER(TRIPLE_FAULT, 2) \
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_ER(PENDING_INTERRUPT, 7) \
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_ER(NMI_WINDOW, 8) \
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_ER(TASK_SWITCH, 9) \
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_ER(CPUID, 10) \
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_ER(HLT, 12) \
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_ER(INVD, 13) \
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_ER(INVLPG, 14) \
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_ER(RDPMC, 15) \
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_ER(RDTSC, 16) \
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_ER(VMCALL, 18) \
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_ER(VMCLEAR, 19) \
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_ER(VMLAUNCH, 20) \
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_ER(VMPTRLD, 21) \
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_ER(VMPTRST, 22) \
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_ER(VMREAD, 23) \
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_ER(VMRESUME, 24) \
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_ER(VMWRITE, 25) \
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_ER(VMOFF, 26) \
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_ER(VMON, 27) \
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_ER(CR_ACCESS, 28) \
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_ER(DR_ACCESS, 29) \
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_ER(IO_INSTRUCTION, 30) \
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_ER(MSR_READ, 31) \
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_ER(MSR_WRITE, 32) \
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_ER(MWAIT_INSTRUCTION, 36) \
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_ER(MONITOR_INSTRUCTION, 39) \
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_ER(PAUSE_INSTRUCTION, 40) \
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_ER(MCE_DURING_VMENTRY, 41) \
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_ER(TPR_BELOW_THRESHOLD, 43) \
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_ER(APIC_ACCESS, 44) \
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_ER(EOI_INDUCED, 45) \
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_ER(EPT_VIOLATION, 48) \
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_ER(EPT_MISCONFIG, 49) \
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_ER(INVEPT, 50) \
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_ER(PREEMPTION_TIMER, 52) \
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_ER(WBINVD, 54) \
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_ER(XSETBV, 55) \
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_ER(APIC_WRITE, 56) \
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_ER(INVPCID, 58)
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#define SVM_EXIT_REASONS \
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_ER(EXIT_READ_CR0, 0x000) \
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_ER(EXIT_READ_CR3, 0x003) \
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_ER(EXIT_READ_CR4, 0x004) \
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_ER(EXIT_READ_CR8, 0x008) \
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_ER(EXIT_WRITE_CR0, 0x010) \
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_ER(EXIT_WRITE_CR3, 0x013) \
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_ER(EXIT_WRITE_CR4, 0x014) \
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_ER(EXIT_WRITE_CR8, 0x018) \
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_ER(EXIT_READ_DR0, 0x020) \
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_ER(EXIT_READ_DR1, 0x021) \
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_ER(EXIT_READ_DR2, 0x022) \
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_ER(EXIT_READ_DR3, 0x023) \
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_ER(EXIT_READ_DR4, 0x024) \
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_ER(EXIT_READ_DR5, 0x025) \
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_ER(EXIT_READ_DR6, 0x026) \
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_ER(EXIT_READ_DR7, 0x027) \
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_ER(EXIT_WRITE_DR0, 0x030) \
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_ER(EXIT_WRITE_DR1, 0x031) \
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_ER(EXIT_WRITE_DR2, 0x032) \
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_ER(EXIT_WRITE_DR3, 0x033) \
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_ER(EXIT_WRITE_DR4, 0x034) \
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_ER(EXIT_WRITE_DR5, 0x035) \
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_ER(EXIT_WRITE_DR6, 0x036) \
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_ER(EXIT_WRITE_DR7, 0x037) \
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_ER(EXIT_EXCP_BASE, 0x040) \
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_ER(EXIT_INTR, 0x060) \
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_ER(EXIT_NMI, 0x061) \
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_ER(EXIT_SMI, 0x062) \
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_ER(EXIT_INIT, 0x063) \
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_ER(EXIT_VINTR, 0x064) \
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_ER(EXIT_CR0_SEL_WRITE, 0x065) \
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_ER(EXIT_IDTR_READ, 0x066) \
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_ER(EXIT_GDTR_READ, 0x067) \
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_ER(EXIT_LDTR_READ, 0x068) \
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_ER(EXIT_TR_READ, 0x069) \
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_ER(EXIT_IDTR_WRITE, 0x06a) \
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_ER(EXIT_GDTR_WRITE, 0x06b) \
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_ER(EXIT_LDTR_WRITE, 0x06c) \
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_ER(EXIT_TR_WRITE, 0x06d) \
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_ER(EXIT_RDTSC, 0x06e) \
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_ER(EXIT_RDPMC, 0x06f) \
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_ER(EXIT_PUSHF, 0x070) \
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_ER(EXIT_POPF, 0x071) \
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_ER(EXIT_CPUID, 0x072) \
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_ER(EXIT_RSM, 0x073) \
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_ER(EXIT_IRET, 0x074) \
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_ER(EXIT_SWINT, 0x075) \
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_ER(EXIT_INVD, 0x076) \
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_ER(EXIT_PAUSE, 0x077) \
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_ER(EXIT_HLT, 0x078) \
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_ER(EXIT_INVLPG, 0x079) \
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_ER(EXIT_INVLPGA, 0x07a) \
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_ER(EXIT_IOIO, 0x07b) \
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_ER(EXIT_MSR, 0x07c) \
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_ER(EXIT_TASK_SWITCH, 0x07d) \
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_ER(EXIT_FERR_FREEZE, 0x07e) \
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_ER(EXIT_SHUTDOWN, 0x07f) \
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_ER(EXIT_VMRUN, 0x080) \
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_ER(EXIT_VMMCALL, 0x081) \
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_ER(EXIT_VMLOAD, 0x082) \
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_ER(EXIT_VMSAVE, 0x083) \
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_ER(EXIT_STGI, 0x084) \
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_ER(EXIT_CLGI, 0x085) \
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_ER(EXIT_SKINIT, 0x086) \
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_ER(EXIT_RDTSCP, 0x087) \
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_ER(EXIT_ICEBP, 0x088) \
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_ER(EXIT_WBINVD, 0x089) \
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_ER(EXIT_MONITOR, 0x08a) \
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_ER(EXIT_MWAIT, 0x08b) \
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_ER(EXIT_MWAIT_COND, 0x08c) \
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_ER(EXIT_NPF, 0x400) \
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_ER(EXIT_ERR, -1)
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#define _ER(reason, val) { #reason, val },
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struct str_values {
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const char *str;
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int val;
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};
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static struct str_values vmx_exit_reasons[] = {
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VMX_EXIT_REASONS
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{ NULL, -1}
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};
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static struct str_values svm_exit_reasons[] = {
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SVM_EXIT_REASONS
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{ NULL, -1}
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};
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static struct isa_exit_reasons {
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unsigned isa;
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struct str_values *strings;
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} isa_exit_reasons[] = {
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{ .isa = 1, .strings = vmx_exit_reasons },
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{ .isa = 2, .strings = svm_exit_reasons },
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{ }
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};
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static const char *find_exit_reason(unsigned isa, int val)
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{
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struct str_values *strings = NULL;
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int i;
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for (i = 0; isa_exit_reasons[i].strings; ++i)
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if (isa_exit_reasons[i].isa == isa) {
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strings = isa_exit_reasons[i].strings;
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break;
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}
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if (!strings)
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return "UNKNOWN-ISA";
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for (i = 0; strings[i].val >= 0; i++)
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if (strings[i].val == val)
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break;
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if (strings[i].str)
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return strings[i].str;
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return "UNKNOWN";
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}
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static int kvm_exit_handler(struct trace_seq *s, struct pevent_record *record,
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struct event_format *event, void *context)
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{
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unsigned long long isa;
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unsigned long long val;
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unsigned long long info1 = 0, info2 = 0;
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if (pevent_get_field_val(s, event, "exit_reason", record, &val, 1) < 0)
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return -1;
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if (pevent_get_field_val(s, event, "isa", record, &isa, 0) < 0)
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isa = 1;
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trace_seq_printf(s, "reason %s", find_exit_reason(isa, val));
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pevent_print_num_field(s, " rip 0x%lx", event, "guest_rip", record, 1);
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if (pevent_get_field_val(s, event, "info1", record, &info1, 0) >= 0
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&& pevent_get_field_val(s, event, "info2", record, &info2, 0) >= 0)
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trace_seq_printf(s, " info %llx %llx", info1, info2);
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return 0;
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}
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#define KVM_EMUL_INSN_F_CR0_PE (1 << 0)
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#define KVM_EMUL_INSN_F_EFL_VM (1 << 1)
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#define KVM_EMUL_INSN_F_CS_D (1 << 2)
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#define KVM_EMUL_INSN_F_CS_L (1 << 3)
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static int kvm_emulate_insn_handler(struct trace_seq *s,
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struct pevent_record *record,
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struct event_format *event, void *context)
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{
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unsigned long long rip, csbase, len, flags, failed;
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int llen;
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uint8_t *insn;
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const char *disasm;
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if (pevent_get_field_val(s, event, "rip", record, &rip, 1) < 0)
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return -1;
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if (pevent_get_field_val(s, event, "csbase", record, &csbase, 1) < 0)
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return -1;
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if (pevent_get_field_val(s, event, "len", record, &len, 1) < 0)
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return -1;
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if (pevent_get_field_val(s, event, "flags", record, &flags, 1) < 0)
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return -1;
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if (pevent_get_field_val(s, event, "failed", record, &failed, 1) < 0)
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return -1;
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insn = pevent_get_field_raw(s, event, "insn", record, &llen, 1);
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if (!insn)
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return -1;
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disasm = disassemble(insn, len, rip,
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flags & KVM_EMUL_INSN_F_CR0_PE,
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flags & KVM_EMUL_INSN_F_EFL_VM,
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flags & KVM_EMUL_INSN_F_CS_D,
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flags & KVM_EMUL_INSN_F_CS_L);
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trace_seq_printf(s, "%llx:%llx: %s%s", csbase, rip, disasm,
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failed ? " FAIL" : "");
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return 0;
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}
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union kvm_mmu_page_role {
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unsigned word;
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struct {
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unsigned glevels:4;
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unsigned level:4;
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unsigned quadrant:2;
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unsigned pad_for_nice_hex_output:6;
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unsigned direct:1;
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unsigned access:3;
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unsigned invalid:1;
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unsigned cr4_pge:1;
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unsigned nxe:1;
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};
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};
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static int kvm_mmu_print_role(struct trace_seq *s, struct pevent_record *record,
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struct event_format *event, void *context)
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{
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unsigned long long val;
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static const char *access_str[] = {
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"---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"
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};
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union kvm_mmu_page_role role;
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if (pevent_get_field_val(s, event, "role", record, &val, 1) < 0)
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return -1;
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role.word = (int)val;
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/*
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* We can only use the structure if file is of the same
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* endianess.
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*/
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if (pevent_is_file_bigendian(event->pevent) ==
|
||||
pevent_is_host_bigendian(event->pevent)) {
|
||||
|
||||
trace_seq_printf(s, "%u/%u q%u%s %s%s %spge %snxe",
|
||||
role.level,
|
||||
role.glevels,
|
||||
role.quadrant,
|
||||
role.direct ? " direct" : "",
|
||||
access_str[role.access],
|
||||
role.invalid ? " invalid" : "",
|
||||
role.cr4_pge ? "" : "!",
|
||||
role.nxe ? "" : "!");
|
||||
} else
|
||||
trace_seq_printf(s, "WORD: %08x", role.word);
|
||||
|
||||
pevent_print_num_field(s, " root %u ", event,
|
||||
"root_count", record, 1);
|
||||
|
||||
if (pevent_get_field_val(s, event, "unsync", record, &val, 1) < 0)
|
||||
return -1;
|
||||
|
||||
trace_seq_printf(s, "%s%c", val ? "unsync" : "sync", 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int kvm_mmu_get_page_handler(struct trace_seq *s,
|
||||
struct pevent_record *record,
|
||||
struct event_format *event, void *context)
|
||||
{
|
||||
unsigned long long val;
|
||||
|
||||
if (pevent_get_field_val(s, event, "created", record, &val, 1) < 0)
|
||||
return -1;
|
||||
|
||||
trace_seq_printf(s, "%s ", val ? "new" : "existing");
|
||||
|
||||
if (pevent_get_field_val(s, event, "gfn", record, &val, 1) < 0)
|
||||
return -1;
|
||||
|
||||
trace_seq_printf(s, "sp gfn %llx ", val);
|
||||
return kvm_mmu_print_role(s, record, event, context);
|
||||
}
|
||||
|
||||
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
|
||||
{
|
||||
init_disassembler();
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvm", "kvm_exit",
|
||||
kvm_exit_handler, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
|
||||
kvm_emulate_insn_handler, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
|
||||
kvm_mmu_get_page_handler, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_sync_page",
|
||||
kvm_mmu_print_role, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1,
|
||||
"kvmmmu", "kvm_mmu_unsync_page",
|
||||
kvm_mmu_print_role, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_zap_page",
|
||||
kvm_mmu_print_role, NULL);
|
||||
|
||||
pevent_register_event_handler(pevent, -1, "kvmmmu",
|
||||
"kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
|
||||
NULL);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user