From b3f37707b05e9ce82d5bec660e9d0b15452ee9a0 Mon Sep 17 00:00:00 2001 From: Nitin A Kamble Date: Thu, 17 May 2007 15:50:34 +0300 Subject: [PATCH] KVM: VMX: Handle #SS faults from real mode Instructions with address size override prefix opcode 0x67 Cause the #SS fault with 0 error code in VM86 mode. Forward them to the emulator. Signed-Off-By: Nitin A Kamble Signed-off-by: Avi Kivity --- drivers/kvm/vmx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index c4c553588a20..a05bfa085877 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1488,7 +1488,11 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu, if (!vcpu->rmode.active) return 0; - if (vec == GP_VECTOR && err_code == 0) + /* + * Instruction with address size override prefix opcode 0x67 + * Cause the #SS fault with 0 error code in VM86 mode. + */ + if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) if (emulate_instruction(vcpu, NULL, 0, 0) == EMULATE_DONE) return 1; return 0; -- 2.30.2