From 7b262e90fc20a49fddf3dad94c8cead1f0439751 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Thu, 18 Mar 2010 15:20:27 +0200 Subject: KVM: x86 emulator: introduce pio in string read ahead. To optimize "rep ins" instruction do IO in big chunks ahead of time instead of doing it only when required during instruction emulation. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- arch/x86/include/asm/kvm_emulate.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 7fda16f89cc8..b5e12c583860 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -151,6 +151,12 @@ struct fetch_cache { unsigned long end; }; +struct read_cache { + u8 data[1024]; + unsigned long pos; + unsigned long end; +}; + struct decode_cache { u8 twobyte; u8 b; @@ -178,6 +184,7 @@ struct decode_cache { void *modrm_ptr; unsigned long modrm_val; struct fetch_cache fetch; + struct read_cache io_read; }; struct x86_emulate_ctxt { -- cgit v1.2.3