From 32b35627355c3bf17e1903efd117efed7653a54e Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Fri, 5 Jan 2007 16:36:51 -0800 Subject: [PATCH] KVM: MMU: Fix cmpxchg8b emulation cmpxchg8b uses edx:eax as the compare operand, not edi:eax. cmpxchg8b is used by 32-bit pae guests to set page table entries atomically, and this is emulated touching shadowed guest page tables. Also, implement it for 32-bit hosts. Signed-off-by: Avi Kivity Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/kvm/x86_emulate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/kvm/x86_emulate.c') diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index 1bff3e925fd..be70795b482 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c @@ -1323,7 +1323,7 @@ twobyte_special_insn: ctxt)) != 0)) goto done; if ((old_lo != _regs[VCPU_REGS_RAX]) - || (old_hi != _regs[VCPU_REGS_RDI])) { + || (old_hi != _regs[VCPU_REGS_RDX])) { _regs[VCPU_REGS_RAX] = old_lo; _regs[VCPU_REGS_RDX] = old_hi; _eflags &= ~EFLG_ZF; -- cgit v1.2.3-70-g09d2