KVM/MIPS32: Privileged instruction/target branch emulation. (e685c689) · Commits · 戴 / test

- The Guest kernel is run in UM and privileged instructions cause a trap. - If the instruction causing the trap is in a branch delay slot, the branch needs to be emulated to figure out the PC @ which the guest will resume execution. Signed-off-by:

Sanjay Lal <sanjayl@kymasys.com> Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by:

Ralf Baechle <ralf@linux-mips.org>

arch/mips/kvm/kvm_mips_emul.c

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arch/mips/kvm/kvm_mips_opcode.h

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Original line number	Diff line number	Diff line
		/*
		* This file is subject to the terms and conditions of the GNU General Public
		* License. See the file "COPYING" in the main directory of this archive
		* for more details.
		*
		* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
		* Authors: Sanjay Lal <sanjayl@kymasys.com>
		*/

		/*
		* Define opcode values not defined in <asm/isnt.h>
		*/

		#ifndef __KVM_MIPS_OPCODE_H__
		#define __KVM_MIPS_OPCODE_H__

		/* COP0 Ops */
		#define mfmcz_op 0x0b /* 01011 */
		#define wrpgpr_op 0x0e /* 01110 */

		/* COP0 opcodes (only if COP0 and CO=1): */
		#define wait_op 0x20 /* 100000 */

		#endif /* __KVM_MIPS_OPCODE_H__ */

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