From 310b5d306c1aee7ebe32f702c0e33e7988d50646 Mon Sep 17 00:00:00 2001 From: Glauber Costa Date: Tue, 12 May 2009 16:21:06 -0400 Subject: KVM: Deal with interrupt shadow state for emulated instructions We currently unblock shadow interrupt state when we skip an instruction, but failing to do so when we actually emulate one. This blocks interrupts in key instruction blocks, in particular sti; hlt; sequences If the instruction emulated is an sti, we have to block shadow interrupts. The same goes for mov ss. pop ss also needs it, but we don't currently emulate it. Without this patch, I cannot boot gpxe option roms at vmx machines. This is described at https://bugzilla.redhat.com/show_bug.cgi?id=494469 Signed-off-by: Glauber Costa CC: H. Peter Anvin CC: Gleb Natapov Signed-off-by: Avi Kivity --- arch/x86/include/asm/kvm_x86_emulate.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/kvm_x86_emulate.h b/arch/x86/include/asm/kvm_x86_emulate.h index be40d6e2b6b..b7ed2c42311 100644 --- a/arch/x86/include/asm/kvm_x86_emulate.h +++ b/arch/x86/include/asm/kvm_x86_emulate.h @@ -155,6 +155,9 @@ struct x86_emulate_ctxt { int mode; u32 cs_base; + /* interruptibility state, as a result of execution of STI or MOV SS */ + int interruptibility; + /* decode cache */ struct decode_cache decode; }; -- cgit v1.2.3