Add a trace of instruction emulation into ftrace. This can help analyze
performance issues, or, in the case of failed emulation, identify the
missing instructions.
v2:
- trace all emulation starts
- add missing statistic increment on failure
(long term we need to get rid of those in favour of perf)
Avi Kivity (2):
KVM: x86 emulator: Don't overwrite decode cache
KVM: Trace emulated instructions
arch/x86/kvm/emulate.c | 19 +++++-----
arch/x86/kvm/trace.h | 86 ++++++++++++++++++++++++++++++++++++++++++++++++
arch/x86/kvm/x86.c | 4 ++
3 files changed, 100 insertions(+), 9 deletions(-)
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