[deliverable/linux.git] / arch / powerpc / kvm / book3s_64_rmhandlers.S

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright SUSE Linux Products GmbH 2009
 *
 * Authors: Alexander Graf <agraf@suse.de>
 */

#include <asm/ppc_asm.h>
#include <asm/kvm_asm.h>
#include <asm/reg.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
#include <asm/exception-64s.h>

/*****************************************************************************
 *                                                                           *
 *        Real Mode handlers that need to be in low physical memory          *
 *                                                                           *
 ****************************************************************************/


.macro INTERRUPT_TRAMPOLINE intno

.global kvmppc_trampoline_\intno
kvmppc_trampoline_\intno:

	mtspr	SPRN_SPRG_SCRATCH0, r13		/* Save r13 */

	/*
	 * First thing to do is to find out if we're coming
	 * from a KVM guest or a Linux process.
	 *
	 * To distinguish, we check a magic byte in the PACA
	 */
	mfspr	r13, SPRN_SPRG_PACA		/* r13 = PACA */
	std	r12, PACA_KVM_SCRATCH0(r13)
	mfcr	r12
	stw	r12, PACA_KVM_SCRATCH1(r13)
	lbz	r12, PACA_KVM_IN_GUEST(r13)
	cmpwi	r12, 0
	bne	..kvmppc_handler_hasmagic_\intno
	/* No KVM guest? Then jump back to the Linux handler! */
	lwz	r12, PACA_KVM_SCRATCH1(r13)
	mtcr	r12
	ld	r12, PACA_KVM_SCRATCH0(r13)
	mfspr	r13, SPRN_SPRG_SCRATCH0		/* r13 = original r13 */
	b	kvmppc_resume_\intno		/* Get back original handler */

	/* Now we know we're handling a KVM guest */
..kvmppc_handler_hasmagic_\intno:
	/* Let's store which interrupt we're handling */
	li	r12, \intno

	/* Jump into the SLB exit code that goes to the highmem handler */
	b	kvmppc_handler_trampoline_exit

.endm

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_SYSTEM_RESET
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_MACHINE_CHECK
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_DATA_STORAGE
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_DATA_SEGMENT
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_INST_STORAGE
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_INST_SEGMENT
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_EXTERNAL
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_ALIGNMENT
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_PROGRAM
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_FP_UNAVAIL
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_DECREMENTER
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_SYSCALL
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_TRACE
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_PERFMON
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_ALTIVEC
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_VSX

/*
 * This trampoline brings us back to a real mode handler
 *
 * Input Registers:
 *
 * R5 = SRR0
 * R6 = SRR1
 * LR = real-mode IP
 *
 */
.global kvmppc_handler_lowmem_trampoline
kvmppc_handler_lowmem_trampoline:

	mtsrr0	r5
	mtsrr1	r6
	blr
kvmppc_handler_lowmem_trampoline_end:

.global kvmppc_trampoline_lowmem
kvmppc_trampoline_lowmem:
	.long kvmppc_handler_lowmem_trampoline - _stext

.global kvmppc_trampoline_enter
kvmppc_trampoline_enter:
	.long kvmppc_handler_trampoline_enter - _stext

#include "book3s_64_slb.S"
Commit	Line	Data
c862125c AG	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright SUSE Linux Products GmbH 2009
	16	*
	17	* Authors: Alexander Graf <agraf@suse.de>
	18	*/
	19
	20	#include <asm/ppc_asm.h>
	21	#include <asm/kvm_asm.h>
	22	#include <asm/reg.h>
	23	#include <asm/page.h>
	24	#include <asm/asm-offsets.h>
	25	#include <asm/exception-64s.h>
	26
	27	/*****************************************************************************
	28	* *
	29	* Real Mode handlers that need to be in low physical memory *
	30	* *
	31	****************************************************************************/
	32
	33
	34	.macro INTERRUPT_TRAMPOLINE intno
	35
	36	.global kvmppc_trampoline_\intno
	37	kvmppc_trampoline_\intno:
	38
	39	mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */
	40
	41	/*
	42	* First thing to do is to find out if we're coming
	43	* from a KVM guest or a Linux process.
	44	*
	45	* To distinguish, we check a magic byte in the PACA
	46	*/
	47	mfspr r13, SPRN_SPRG_PACA /* r13 = PACA */
7e57cba0	48	std r12, PACA_KVM_SCRATCH0(r13)
c862125c	49	mfcr r12
7e57cba0	50	stw r12, PACA_KVM_SCRATCH1(r13)
c862125c AG	51	lbz r12, PACA_KVM_IN_GUEST(r13)
	52	cmpwi r12, 0
	53	bne ..kvmppc_handler_hasmagic_\intno
	54	/* No KVM guest? Then jump back to the Linux handler! */
7e57cba0	55	lwz r12, PACA_KVM_SCRATCH1(r13)
c862125c	56	mtcr r12
7e57cba0	57	ld r12, PACA_KVM_SCRATCH0(r13)
c862125c AG	58	mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */
	59	b kvmppc_resume_\intno /* Get back original handler */
	60
	61	/* Now we know we're handling a KVM guest */
	62	..kvmppc_handler_hasmagic_\intno:
c862125c AG	63	/* Let's store which interrupt we're handling */
	64	li r12, \intno
	65
	66	/* Jump into the SLB exit code that goes to the highmem handler */
	67	b kvmppc_handler_trampoline_exit
	68
	69	.endm
	70
	71	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSTEM_RESET
	72	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK
	73	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE
	74	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT
	75	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE
	76	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT
	77	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL
	78	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT
	79	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM
	80	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL
	81	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DECREMENTER
	82	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSCALL
	83	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE
	84	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON
	85	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC
	86	INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX
	87
	88	/*
	89	* This trampoline brings us back to a real mode handler
	90	*
	91	* Input Registers:
	92	*
7e57cba0 AG	93	* R5 = SRR0
7e57cba0 AG	94	* R6 = SRR1
c862125c AG	95	* LR = real-mode IP
	96	*
	97	*/
	98	.global kvmppc_handler_lowmem_trampoline
	99	kvmppc_handler_lowmem_trampoline:
	100
7e57cba0 AG	101	mtsrr0 r5
7e57cba0 AG	102	mtsrr1 r6
c862125c AG	103	blr
	104	kvmppc_handler_lowmem_trampoline_end:
	105
	106	.global kvmppc_trampoline_lowmem
	107	kvmppc_trampoline_lowmem:
	108	.long kvmppc_handler_lowmem_trampoline - _stext
	109
	110	.global kvmppc_trampoline_enter
	111	kvmppc_trampoline_enter:
	112	.long kvmppc_handler_trampoline_enter - _stext
	113
	114	#include "book3s_64_slb.S"
	115