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KVM: x86 emulator: introduce read cache

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Introduce read cache which is needed for instruction that require more
then one exit to userspace. After returning from userspace the instruction
will be re-executed with cached read value.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov
2010-04-28 19:15:22 +03:00
committed by Avi Kivity
parent 1c11e71357
commit 9de4157367
2 changed files with 43 additions and 14 deletions
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arch/x86/include/asm/kvm_emulate.h
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@@ -186,6 +186,7 @@ struct decode_cache {
unsigned long modrm_val;
struct fetch_cache fetch;
struct read_cache io_read;
struct read_cache mem_read;
};
struct x86_emulate_ctxt {