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Namhyung Kim b102f1d0f1 tracing/kvm: Use __print_hex() for kvm_emulate_insn tracepoint 
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>
2012-06-28 13:52:15 -04:00
..
cpuid.c KVM: fix cpuid eax for KVM leaf 2012-05-06 15:51:56 +03:00
cpuid.h KVM: SVM: Add support for AMD's OSVW feature in guests 2012-03-05 14:52:21 +02:00
emulate.c KVM: x86 emulator: convert bsf/bsr instructions to emulate_2op_SrcV_nobyte() 2012-05-14 11:32:38 +03:00
i8254.c KVM: x86: Run PIT work in own kthread 2012-04-27 19:40:29 -03:00
i8254.h KVM: x86: Run PIT work in own kthread 2012-04-27 19:40:29 -03:00
i8259.c KVM: x86: reset edge sense circuit of i8259 on init 2012-03-05 14:57:30 +02:00
irq.c KVM: fix typo in copyright notice 2010-10-24 10:53:14 +02:00
irq.h KVM: Intelligent device lookup on I/O bus 2011-09-25 19:17:59 +03:00
Kconfig KVM: Introduce direct MSI message injection for in-kernel irqchips 2012-04-24 15:59:47 +03:00
kvm_cache_regs.h KVM: MMU: Do not unconditionally read PDPTE from guest memory 2011-09-25 19:18:01 +03:00
kvm_timer.h KVM: emulate lapic tsc deadline timer for guest 2011-10-05 15:34:56 +02:00
lapic.c KVM: Introduce bitmask for apic attention reasons 2012-04-24 16:36:18 +03:00
lapic.h KVM: Expose kvm_lapic_local_deliver() 2011-12-27 11:23:39 +02:00
Makefile KVM: Expose a version 2 architectural PMU to a guests 2011-12-27 11:24:29 +02:00
mmu.c KVM: MMU: fix huge page adapted on non-PAE host 2012-05-28 17:41:15 +03:00
mmu.h KVM: MMU: mmio page fault support 2011-07-24 11:50:40 +03:00
mmu_audit.c KVM: MMU: Improve iteration through sptes from rmap 2012-04-08 16:08:27 +03:00
mmutrace.h KVM: MMU: audit: replace mmu audit tracepoint with jump-label 2011-12-27 11:22:05 +02:00
paging_tmpl.h KVM: MMU: use page table level macro 2012-04-18 23:35:01 -03:00
pmu.c KVM: PMU emulation: GLOBAL_CTRL MSR should be enabled on reset 2012-04-10 15:34:10 +03:00
svm.c KVM: SVM: Auto-load on CPUs with SVM 2012-04-16 20:35:04 -03:00
timer.c KVM: x86: Simplify kvm timer handler 2011-12-27 11:17:05 +02:00
trace.h tracing/kvm: Use __print_hex() for kvm_emulate_insn tracepoint 2012-06-28 13:52:15 -04:00
tss.h KVM: x86: hardware task switching support 2008-04-27 12:00:39 +03:00
vmx.c KVM: VMX: Optimize %ds, %es reload 2012-05-16 16:03:19 -03:00
x86.c Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2012-05-24 16:17:30 -07:00
x86.h KVM: x86: add paging gcc optimization 2012-04-08 14:03:13 +03:00