From 42bf549f3c672006ba18e97152cbc563315ba4e6 Mon Sep 17 00:00:00 2001 From: Nadav Amit <namit@cs.technion.ac.il> Date: Fri, 18 Apr 2014 07:11:34 +0300 Subject: [PATCH] KVM: x86: Processor mode may be determined incorrectly If EFER.LMA is off, cs.l does not determine execution mode. Currently, the emulation engine assumes differently. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> --- arch/x86/kvm/x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e4ccc6cf41089..7cc646626afd7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4888,7 +4888,7 @@ static void init_emulate_ctxt(struct kvm_vcpu *vcpu) ctxt->eip = kvm_rip_read(vcpu); ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : - cs_l ? X86EMUL_MODE_PROT64 : + (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : cs_db ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; ctxt->guest_mode = is_guest_mode(vcpu); -- 2.30.2