From 7d882ffa81d52a19071952acf4460c06a38861e5 Mon Sep 17 00:00:00 2001 From: Nadav Amit Date: Wed, 19 Nov 2014 17:43:08 +0200 Subject: [PATCH] KVM: x86: Revert NoBigReal patch in the emulator Commit 10e38fc7cab6 ("KVM: x86: Emulator flag for instruction that only support 16-bit addresses in real mode") introduced NoBigReal for instructions such as MONITOR. Apparetnly, the Intel SDM description that led to this patch is misleading. Since no instruction is using NoBigReal, it is safe to remove it, we fully understand what the SDM means. Signed-off-by: Nadav Amit Signed-off-by: Paolo Bonzini --- arch/x86/kvm/emulate.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index e020fed..5d47714 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -690,13 +690,7 @@ static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt, if (!fetch && (desc.type & 8) && !(desc.type & 2)) goto bad; lim = desc_limit_scaled(&desc); - if ((ctxt->mode == X86EMUL_MODE_REAL) && !fetch && - (ctxt->d & NoBigReal)) { - /* la is between zero and 0xffff */ - if (la > 0xffff) - goto bad; - *max_size = 0x10000 - la; - } else if ((desc.type & 8) || !(desc.type & 4)) { + if ((desc.type & 8) || !(desc.type & 4)) { /* expand-up segment */ if (addr.ea > lim) goto bad; -- 2.7.4