KVM: emulate: avoid per-byte copying in instruction fetches

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We do not need a memory copying loop anymore in insn_fetch; we
can use a byte-aligned pointer to access instruction fields directly
from the fetch_cache.  This eliminates 50-150 cycles (corresponding to
a 5-10% improvement in performance) from each instruction.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2014-05-06 13:05:25 +02:00

parent 5cfc7e0f5e

commit 9506d57de3

1 changed files with 22 additions and 24 deletions

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arch/x86/kvm/emulate.c

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