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b102f1d0f1
The kvm_emulate_insn tracepoint used __print_insn() for printing its instructions. However it makes the format of the event hard to parse as it reveals TP internals. Fortunately, kernel provides __print_hex for almost same purpose, we can use it instead of open coding it. The user-space can be changed to parse it later. That means raw kernel tracing will not be affected by this change: # cd /sys/kernel/debug/tracing/ # cat events/kvm/kvm_emulate_insn/format name: kvm_emulate_insn ID: 29 format: ... print fmt: "%x:%llx:%s (%s)%s", REC->csbase, REC->rip, __print_hex(REC->insn, REC->len), \ __print_symbolic(REC->flags, { 0, "real" }, { (1 << 0) | (1 << 1), "vm16" }, \ { (1 << 0), "prot16" }, { (1 << 0) | (1 << 2), "prot32" }, { (1 << 0) | (1 << 3), "prot64" }), \ REC->failed ? " failed" : "" # echo 1 > events/kvm/kvm_emulate_insn/enable # cat trace # tracer: nop # # entries-in-buffer/entries-written: 2183/2183 #P:12 # # _-----=> irqs-off # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / delay # TASK-PID CPU# |||| TIMESTAMP FUNCTION # | | | |||| | | qemu-kvm-1782 [002] ...1 140.931636: kvm_emulate_insn: 0:c102fa25:89 10 (prot32) qemu-kvm-1781 [004] ...1 140.931637: kvm_emulate_insn: 0:c102fa25:89 10 (prot32) Link: http://lkml.kernel.org/n/tip-wfw6y3b9ugtey8snaow9nmg5@git.kernel.org Link: http://lkml.kernel.org/r/1340757701-10711-2-git-send-email-namhyung@kernel.org Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: kvm@vger.kernel.org Acked-by: Avi Kivity <avi@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> |
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.. | ||
cpuid.c | ||
cpuid.h | ||
emulate.c | ||
i8254.c | ||
i8254.h | ||
i8259.c | ||
irq.c | ||
irq.h | ||
Kconfig | ||
kvm_cache_regs.h | ||
kvm_timer.h | ||
lapic.c | ||
lapic.h | ||
Makefile | ||
mmu_audit.c | ||
mmu.c | ||
mmu.h | ||
mmutrace.h | ||
paging_tmpl.h | ||
pmu.c | ||
svm.c | ||
timer.c | ||
trace.h | ||
tss.h | ||
vmx.c | ||
x86.c | ||
x86.h |