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Commit b3f37707 authored by Nitin A Kamble's avatar Nitin A Kamble Committed by Avi Kivity
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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: default avatarNitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent cd2276a7

drivers/kvm/vmx.c

+5 −1
Original line number Diff line number Diff line
@@ -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;