Commit b01c8b54 authored by Paul Mackerras's avatar Paul Mackerras Committed by Avi Kivity
Browse files

powerpc, KVM: Rework KVM checks in first-level interrupt handlers 



Instead of branching out-of-line with the DO_KVM macro to check if we
are in a KVM guest at the time of an interrupt, this moves the KVM
check inline in the first-level interrupt handlers.  This speeds up
the non-KVM case and makes sure that none of the interrupt handlers
are missing the check.

Because the first-level interrupt handlers are now larger, some things
had to be move out of line in exceptions-64s.S.

This all necessitated some minor changes to the interrupt entry code
in KVM.  This also streamlines the book3s_32 KVM test.

Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent f05ed4d5

arch/powerpc/include/asm/exception-64s.h

+81 −40
Original line number Diff line number Diff line
@@ -61,19 +61,22 @@ 
#define EXC_HV	H

#define EXC_STD



#define EXCEPTION_PROLOG_1(area)					\

#define __EXCEPTION_PROLOG_1(area, extra, vec)				\

	GET_PACA(r13);							\

	std	r9,area+EX_R9(r13);	/* save r9 - r12 */		\

	std	r10,area+EX_R10(r13);					\

	std	r11,area+EX_R11(r13);					\

	std	r12,area+EX_R12(r13);					\

	BEGIN_FTR_SECTION_NESTED(66);					\

	mfspr	r10,SPRN_CFAR;						\

	std	r10,area+EX_CFAR(r13);					\

	END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);		\

	GET_SCRATCH0(r9);						\

	std	r9,area+EX_R13(r13);					\

	mfcr	r9

	mfcr	r9;							\

	extra(vec);							\

	std	r11,area+EX_R11(r13);					\

	std	r12,area+EX_R12(r13);					\

	GET_SCRATCH0(r10);						\

	std	r10,area+EX_R13(r13)

#define EXCEPTION_PROLOG_1(area, extra, vec)				\

	__EXCEPTION_PROLOG_1(area, extra, vec)



#define __EXCEPTION_PROLOG_PSERIES_1(label, h)				\

	ld	r12,PACAKBASE(r13);	/* get high part of &label */	\
@@ -88,10 +91,51 @@ 
#define EXCEPTION_PROLOG_PSERIES_1(label, h)				\

	__EXCEPTION_PROLOG_PSERIES_1(label, h)



#define EXCEPTION_PROLOG_PSERIES(area, label, h)			\

	EXCEPTION_PROLOG_1(area);					\

#define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec)		\

	EXCEPTION_PROLOG_1(area, extra, vec);				\

	EXCEPTION_PROLOG_PSERIES_1(label, h);



#define __KVMTEST(n)							\

	lbz	r10,PACA_KVM_SVCPU+SVCPU_IN_GUEST(r13);			\

	cmpwi	r10,0;							\

	bne	do_kvm_##n



#define __KVM_HANDLER(area, h, n)					\

do_kvm_##n:								\

	ld	r10,area+EX_R10(r13);					\

	stw	r9,PACA_KVM_SVCPU+SVCPU_SCRATCH1(r13);			\

	ld	r9,area+EX_R9(r13);					\

	std	r12,PACA_KVM_SVCPU+SVCPU_SCRATCH0(r13);			\

	li	r12,n;							\

	b	kvmppc_interrupt



#define __KVM_HANDLER_SKIP(area, h, n)					\

do_kvm_##n:								\

	cmpwi	r10,KVM_GUEST_MODE_SKIP;				\

	ld	r10,area+EX_R10(r13);					\

	beq	89f;							\

	stw	r9,PACA_KVM_SVCPU+SVCPU_SCRATCH1(r13);			\

	ld	r9,area+EX_R9(r13);					\

	std	r12,PACA_KVM_SVCPU+SVCPU_SCRATCH0(r13);			\

	li	r12,n;							\

	b	kvmppc_interrupt;					\

89:	mtocrf	0x80,r9;						\

	ld	r9,area+EX_R9(r13);					\

	b	kvmppc_skip_##h##interrupt



#ifdef CONFIG_KVM_BOOK3S_64_HANDLER

#define KVMTEST(n)			__KVMTEST(n)

#define KVM_HANDLER(area, h, n)		__KVM_HANDLER(area, h, n)

#define KVM_HANDLER_SKIP(area, h, n)	__KVM_HANDLER_SKIP(area, h, n)



#else

#define KVMTEST(n)

#define KVM_HANDLER(area, h, n)

#define KVM_HANDLER_SKIP(area, h, n)

#endif



#define NOTEST(n)



/*

 * The common exception prolog is used for all except a few exceptions

 * such as a segment miss on a kernel address.  We have to be prepared
@@ -164,57 +208,54 @@ 
	.globl label##_pSeries;				\

label##_pSeries:					\

	HMT_MEDIUM;					\

	DO_KVM	vec;					\

	SET_SCRATCH0(r13);		/* save r13 */		\

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_STD)

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,	\

				 EXC_STD, KVMTEST, vec)



#define STD_EXCEPTION_HV(loc, vec, label)		\

	. = loc;					\

	.globl label##_hv;				\

label##_hv:						\

	HMT_MEDIUM;					\

	DO_KVM	vec;					\

	SET_SCRATCH0(r13);	/* save r13 */			\

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_HV)

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,	\

				 EXC_HV, KVMTEST, vec)



#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h)			\

	HMT_MEDIUM;							\

	DO_KVM	vec;							\

	SET_SCRATCH0(r13);    /* save r13 */				\

	GET_PACA(r13);							\

	std	r9,PACA_EXGEN+EX_R9(r13);	/* save r9, r10 */	\

	std	r10,PACA_EXGEN+EX_R10(r13);				\

#define __SOFTEN_TEST(h)						\

	lbz	r10,PACASOFTIRQEN(r13);					\

	mfcr	r9;							\

	cmpwi	r10,0;							\

	beq	masked_##h##interrupt;					\

	GET_SCRATCH0(r10);						\

	std	r10,PACA_EXGEN+EX_R13(r13);				\

	std	r11,PACA_EXGEN+EX_R11(r13);				\

	std	r12,PACA_EXGEN+EX_R12(r13);				\

	ld	r12,PACAKBASE(r13);	/* get high part of &label */	\

	ld	r10,PACAKMSR(r13);	/* get MSR value for kernel */	\

	mfspr	r11,SPRN_##h##SRR0;	/* save SRR0 */			\

	LOAD_HANDLER(r12,label##_common)				\

	mtspr	SPRN_##h##SRR0,r12;					\

	mfspr	r12,SPRN_##h##SRR1;	/* and SRR1 */			\

	mtspr	SPRN_##h##SRR1,r10;					\

	h##rfid;							\

	b	.	/* prevent speculative execution */

#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h)			\

	__MASKABLE_EXCEPTION_PSERIES(vec, label, h)

	beq	masked_##h##interrupt

#define _SOFTEN_TEST(h)	__SOFTEN_TEST(h)



#define SOFTEN_TEST(vec)						\

	KVMTEST(vec);							\

	_SOFTEN_TEST(EXC_STD)



#define SOFTEN_TEST_HV(vec)						\

	KVMTEST(vec);							\

	_SOFTEN_TEST(EXC_HV)



#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)		\

	HMT_MEDIUM;							\

	SET_SCRATCH0(r13);    /* save r13 */				\

	__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);		\

	EXCEPTION_PROLOG_PSERIES_1(label##_common, h);

#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)		\

	__MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)



#define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)			\

	. = loc;							\

	.globl label##_pSeries;						\

label##_pSeries:							\

	_MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_STD)

	_MASKABLE_EXCEPTION_PSERIES(vec, label,				\

				    EXC_STD, SOFTEN_TEST)



#define MASKABLE_EXCEPTION_HV(loc, vec, label)				\

	. = loc;							\

	.globl label##_hv;						\

label##_hv:								\

	_MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_HV)

	_MASKABLE_EXCEPTION_PSERIES(vec, label,				\

				    EXC_HV, SOFTEN_TEST_HV)



#ifdef CONFIG_PPC_ISERIES

#define DISABLE_INTS				\

arch/powerpc/kernel/exceptions-64s.S

+115 −74
Original line number Diff line number Diff line
@@ -40,7 +40,6 @@ __start_interrupts: 
	.globl system_reset_pSeries;

system_reset_pSeries:

	HMT_MEDIUM;

	DO_KVM	0x100;

	SET_SCRATCH0(r13)

#ifdef CONFIG_PPC_P7_NAP

BEGIN_FTR_SECTION
@@ -65,67 +64,45 @@ BEGIN_FTR_SECTION 
	beq	.

END_FTR_SECTION_IFSET(CPU_FTR_HVMODE_206)

#endif /* CONFIG_PPC_P7_NAP */

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD)

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,

				 NOTEST, 0x100)



	. = 0x200

_machine_check_pSeries:

	HMT_MEDIUM

	DO_KVM	0x200

	SET_SCRATCH0(r13)

	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common, EXC_STD)

machine_check_pSeries_1:

	/* This is moved out of line as it can be patched by FW, but

	 * some code path might still want to branch into the original

	 * vector

	 */

	b	machine_check_pSeries



	. = 0x300

	.globl data_access_pSeries

data_access_pSeries:

	HMT_MEDIUM

	DO_KVM	0x300

	SET_SCRATCH0(r13)

#ifndef CONFIG_POWER4_ONLY

BEGIN_FTR_SECTION

	GET_PACA(r13)

	std	r9,PACA_EXSLB+EX_R9(r13)

	std	r10,PACA_EXSLB+EX_R10(r13)

	mfspr	r10,SPRN_DAR

	mfspr	r9,SPRN_DSISR

	srdi	r10,r10,60

	rlwimi	r10,r9,16,0x20

	mfcr	r9

	cmpwi	r10,0x2c

	beq	do_stab_bolted_pSeries

	ld	r10,PACA_EXSLB+EX_R10(r13)

	std	r11,PACA_EXGEN+EX_R11(r13)

	ld	r11,PACA_EXSLB+EX_R9(r13)

	std	r12,PACA_EXGEN+EX_R12(r13)

	GET_SCRATCH0(r12)

	std	r10,PACA_EXGEN+EX_R10(r13)

	std	r11,PACA_EXGEN+EX_R9(r13)

	std	r12,PACA_EXGEN+EX_R13(r13)

	EXCEPTION_PROLOG_PSERIES_1(data_access_common, EXC_STD)

FTR_SECTION_ELSE

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD)

ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_SLB)

	b	data_access_check_stab

data_access_not_stab:

END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)

#endif

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,

				 KVMTEST, 0x300)



	. = 0x380

	.globl data_access_slb_pSeries

data_access_slb_pSeries:

	HMT_MEDIUM

	DO_KVM	0x380

	SET_SCRATCH0(r13)

	GET_PACA(r13)

	EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)

	std	r3,PACA_EXSLB+EX_R3(r13)

	mfspr	r3,SPRN_DAR

	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */

	mfcr	r9

#ifdef __DISABLED__

	/* Keep that around for when we re-implement dynamic VSIDs */

	cmpdi	r3,0

	bge	slb_miss_user_pseries

#endif /* __DISABLED__ */

	std	r10,PACA_EXSLB+EX_R10(r13)

	std	r11,PACA_EXSLB+EX_R11(r13)

	std	r12,PACA_EXSLB+EX_R12(r13)

	GET_SCRATCH0(r10)

	std	r10,PACA_EXSLB+EX_R13(r13)

	mfspr	r12,SPRN_SRR1		/* and SRR1 */

	mfspr	r12,SPRN_SRR1

#ifndef CONFIG_RELOCATABLE

	b	.slb_miss_realmode

#else
@@ -147,24 +124,16 @@ data_access_slb_pSeries: 
	.globl instruction_access_slb_pSeries

instruction_access_slb_pSeries:

	HMT_MEDIUM

	DO_KVM	0x480

	SET_SCRATCH0(r13)

	GET_PACA(r13)

	EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x480)

	std	r3,PACA_EXSLB+EX_R3(r13)

	mfspr	r3,SPRN_SRR0		/* SRR0 is faulting address */

	std	r9,PACA_EXSLB+EX_R9(r13)	/* save r9 - r12 */

	mfcr	r9

#ifdef __DISABLED__

	/* Keep that around for when we re-implement dynamic VSIDs */

	cmpdi	r3,0

	bge	slb_miss_user_pseries

#endif /* __DISABLED__ */

	std	r10,PACA_EXSLB+EX_R10(r13)

	std	r11,PACA_EXSLB+EX_R11(r13)

	std	r12,PACA_EXSLB+EX_R12(r13)

	GET_SCRATCH0(r10)

	std	r10,PACA_EXSLB+EX_R13(r13)

	mfspr	r12,SPRN_SRR1		/* and SRR1 */

	mfspr	r12,SPRN_SRR1

#ifndef CONFIG_RELOCATABLE

	b	.slb_miss_realmode

#else
@@ -184,26 +153,46 @@ instruction_access_slb_pSeries: 
hardware_interrupt_pSeries:

hardware_interrupt_hv:

	BEGIN_FTR_SECTION

		_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD)

		_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,

					    EXC_STD, SOFTEN_TEST)

		KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)

	FTR_SECTION_ELSE

		_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV)

		_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,

					    EXC_HV, SOFTEN_TEST_HV)

		KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)

	ALT_FTR_SECTION_END_IFCLR(CPU_FTR_HVMODE_206)



	STD_EXCEPTION_PSERIES(0x600, 0x600, alignment)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x600)



	STD_EXCEPTION_PSERIES(0x700, 0x700, program_check)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x700)



	STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x800)



	MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)

	MASKABLE_EXCEPTION_HV(0x980, 0x980, decrementer)

	MASKABLE_EXCEPTION_HV(0x980, 0x982, decrementer)



	STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00)



	STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xb00)



	. = 0xc00

	.globl	system_call_pSeries

system_call_pSeries:

	HMT_MEDIUM

	DO_KVM	0xc00

#ifdef CONFIG_KVM_BOOK3S_64_HANDLER

	SET_SCRATCH0(r13)

	GET_PACA(r13)

	std	r9,PACA_EXGEN+EX_R9(r13)

	std	r10,PACA_EXGEN+EX_R10(r13)

	mfcr	r9

	KVMTEST(0xc00)

	GET_SCRATCH0(r13)

#endif

BEGIN_FTR_SECTION

	cmpdi	r0,0x1ebe

	beq-	1f
@@ -220,6 +209,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) 
	rfid

	b	.	/* prevent speculative execution */



	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00)



/* Fast LE/BE switch system call */

1:	mfspr	r12,SPRN_SRR1

	xori	r12,r12,MSR_LE
@@ -228,6 +219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) 
	b	.



	STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xd00)



	/* At 0xe??? we have a bunch of hypervisor exceptions, we branch

	 * out of line to handle them
@@ -262,30 +254,93 @@ vsx_unavailable_pSeries_1: 


#ifdef CONFIG_CBE_RAS

	STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)

	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)

#endif /* CONFIG_CBE_RAS */



	STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint)

	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1300)



#ifdef CONFIG_CBE_RAS

	STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance)

	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602)

#endif /* CONFIG_CBE_RAS */



	STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x1700)



#ifdef CONFIG_CBE_RAS

	STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal)

	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802)

#endif /* CONFIG_CBE_RAS */



	. = 0x3000



/*** Out of line interrupts support ***/



	/* moved from 0x200 */

machine_check_pSeries:

	.globl machine_check_fwnmi

machine_check_fwnmi:

	HMT_MEDIUM

	SET_SCRATCH0(r13)		/* save r13 */

	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common,

				 EXC_STD, KVMTEST, 0x200)

	KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200)



#ifndef CONFIG_POWER4_ONLY

	/* moved from 0x300 */

data_access_check_stab:

	GET_PACA(r13)

	std	r9,PACA_EXSLB+EX_R9(r13)

	std	r10,PACA_EXSLB+EX_R10(r13)

	mfspr	r10,SPRN_DAR

	mfspr	r9,SPRN_DSISR

	srdi	r10,r10,60

	rlwimi	r10,r9,16,0x20

#ifdef CONFIG_KVM_BOOK3S_64_HANDLER

	lbz	r9,PACA_KVM_SVCPU+SVCPU_IN_GUEST(r13)

	rlwimi	r10,r9,8,0x300

#endif

	mfcr	r9

	cmpwi	r10,0x2c

	beq	do_stab_bolted_pSeries

	mtcrf	0x80,r9

	ld	r9,PACA_EXSLB+EX_R9(r13)

	ld	r10,PACA_EXSLB+EX_R10(r13)

	b	data_access_not_stab

do_stab_bolted_pSeries:

	std	r11,PACA_EXSLB+EX_R11(r13)

	std	r12,PACA_EXSLB+EX_R12(r13)

	GET_SCRATCH0(r10)

	std	r10,PACA_EXSLB+EX_R13(r13)

	EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)

#endif /* CONFIG_POWER4_ONLY */



	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)

	KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x400)

	KVM_HANDLER(PACA_EXSLB, EXC_STD, 0x480)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x900)

	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982)



	.align	7

	/* moved from 0xe00 */

	STD_EXCEPTION_HV(., 0xe00, h_data_storage)

	STD_EXCEPTION_HV(., 0xe20, h_instr_storage)

	STD_EXCEPTION_HV(., 0xe40, emulation_assist)

	STD_EXCEPTION_HV(., 0xe60, hmi_exception) /* need to flush cache ? */

	STD_EXCEPTION_HV(., 0xe02, h_data_storage)

	KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02)

	STD_EXCEPTION_HV(., 0xe22, h_instr_storage)

	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22)

	STD_EXCEPTION_HV(., 0xe42, emulation_assist)

	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42)

	STD_EXCEPTION_HV(., 0xe62, hmi_exception) /* need to flush cache ? */

	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62)



	/* moved from 0xf00 */

	STD_EXCEPTION_PSERIES(., 0xf00, performance_monitor)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00)

	STD_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20)

	STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)

	KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf40)



/*

 * An interrupt came in while soft-disabled; clear EE in SRR1,
@@ -317,14 +372,6 @@ masked_Hinterrupt: 
	hrfid

	b	.



	.align	7

do_stab_bolted_pSeries:

	std	r11,PACA_EXSLB+EX_R11(r13)

	std	r12,PACA_EXSLB+EX_R12(r13)

	GET_SCRATCH0(r10)

	std	r10,PACA_EXSLB+EX_R13(r13)

	EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)



#ifdef CONFIG_PPC_PSERIES

/*

 * Vectors for the FWNMI option.  Share common code.
@@ -334,14 +381,8 @@ do_stab_bolted_pSeries: 
system_reset_fwnmi:

	HMT_MEDIUM

	SET_SCRATCH0(r13)		/* save r13 */

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD)



	.globl machine_check_fwnmi

      .align 7

machine_check_fwnmi:

	HMT_MEDIUM

	SET_SCRATCH0(r13)		/* save r13 */

	EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common, EXC_STD)

	EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,

				 NOTEST, 0x100)



#endif /* CONFIG_PPC_PSERIES */

arch/powerpc/kvm/book3s_rmhandlers.S

+41 −37
Original line number Diff line number Diff line
@@ -40,37 +40,42 @@ 
#define MSR_NOIRQ		MSR_KERNEL & ~(MSR_IR | MSR_DR)

#define FUNC(name) 		GLUE(.,name)



#elif defined(CONFIG_PPC_BOOK3S_32)

kvmppc_skip_interrupt:

	/*

	 * Here all GPRs are unchanged from when the interrupt happened

	 * except for r13, which is saved in SPRG_SCRATCH0.

	 */

	mfspr	r13, SPRN_SRR0

	addi	r13, r13, 4

	mtspr	SPRN_SRR0, r13

	GET_SCRATCH0(r13)

	rfid

	b	.



kvmppc_skip_Hinterrupt:

	/*

	 * Here all GPRs are unchanged from when the interrupt happened

	 * except for r13, which is saved in SPRG_SCRATCH0.

	 */

	mfspr	r13, SPRN_HSRR0

	addi	r13, r13, 4

	mtspr	SPRN_HSRR0, r13

	GET_SCRATCH0(r13)

	hrfid

	b	.



#define LOAD_SHADOW_VCPU(reg)						\

	mfspr	reg, SPRN_SPRG_THREAD;					\

	lwz	reg, THREAD_KVM_SVCPU(reg);				\

	/* PPC32 can have a NULL pointer - let's check for that */	\

	mtspr   SPRN_SPRG_SCRATCH1, r12;	/* Save r12 */		\

	mfcr	r12;							\

	cmpwi	reg, 0;							\

	bne	1f;							\

	mfspr	reg, SPRN_SPRG_SCRATCH0;				\

	mtcr	r12;							\

	mfspr	r12, SPRN_SPRG_SCRATCH1;				\

	b	kvmppc_resume_\intno;					\

1:;									\

	mtcr	r12;							\

	mfspr	r12, SPRN_SPRG_SCRATCH1;				\

	tophys(reg, reg)

#elif defined(CONFIG_PPC_BOOK3S_32)



#define SHADOW_VCPU_OFF		0

#define MSR_NOIRQ		MSR_KERNEL

#define FUNC(name)		name



#endif



.macro INTERRUPT_TRAMPOLINE intno



.global kvmppc_trampoline_\intno

kvmppc_trampoline_\intno:



	SET_SCRATCH0(r13)		/* Save r13 */

	mtspr	SPRN_SPRG_SCRATCH0, r13		/* Save r13 */



	/*

	 * First thing to do is to find out if we're coming
@@ -78,19 +83,28 @@ kvmppc_trampoline_\intno: 
	 *

	 * To distinguish, we check a magic byte in the PACA/current

	 */

	LOAD_SHADOW_VCPU(r13)

	PPC_STL	r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)

	mfspr	r13, SPRN_SPRG_THREAD

	lwz	r13, THREAD_KVM_SVCPU(r13)

	/* PPC32 can have a NULL pointer - let's check for that */

	mtspr   SPRN_SPRG_SCRATCH1, r12		/* Save r12 */

	mfcr	r12

	cmpwi	r13, 0

	bne	1f

2:	mtcr	r12

	mfspr	r12, SPRN_SPRG_SCRATCH1

	mfspr	r13, SPRN_SPRG_SCRATCH0		/* r13 = original r13 */

	b	kvmppc_resume_\intno		/* Get back original handler */



1:	tophys(r13, r13)

	stw	r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13)

	mfspr	r12, SPRN_SPRG_SCRATCH1

	stw	r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)

	lbz	r12, (SHADOW_VCPU_OFF + SVCPU_IN_GUEST)(r13)

	cmpwi	r12, KVM_GUEST_MODE_NONE

	bne	..kvmppc_handler_hasmagic_\intno

	/* No KVM guest? Then jump back to the Linux handler! */

	lwz	r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13)

	mtcr	r12

	PPC_LL	r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)

	GET_SCRATCH0(r13)			/* r13 = original r13 */

	b	kvmppc_resume_\intno		/* Get back original handler */

	b	2b



	/* Now we know we're handling a KVM guest */

..kvmppc_handler_hasmagic_\intno:
@@ -112,9 +126,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK 
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_DATA_STORAGE

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_INST_STORAGE

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_EXTERNAL

#ifdef CONFIG_PPC_BOOK3S_64

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_EXTERNAL_HV

#endif

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_ALIGNMENT

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_PROGRAM

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_FP_UNAVAIL
@@ -124,14 +135,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE 
INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_PERFMON

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_ALTIVEC



/* Those are only available on 64 bit machines */



#ifdef CONFIG_PPC_BOOK3S_64

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_DATA_SEGMENT

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_INST_SEGMENT

INTERRUPT_TRAMPOLINE	BOOK3S_INTERRUPT_VSX

#endif



/*

 * Bring us back to the faulting code, but skip the

 * faulting instruction.
@@ -163,6 +166,7 @@ kvmppc_handler_skip_ins: 


	/* And get back into the code */

	RFI

#endif



/*

 * This trampoline brings us back to a real mode handler

arch/powerpc/kvm/book3s_segment.S

+7 −0
Original line number Diff line number Diff line
@@ -125,6 +125,9 @@ kvmppc_handler_trampoline_enter_end: 
.global kvmppc_handler_trampoline_exit

kvmppc_handler_trampoline_exit:



.global kvmppc_interrupt

kvmppc_interrupt:



	/* Register usage at this point:

	 *

	 * SPRG_SCRATCH0  = guest R13
@@ -155,12 +158,16 @@ kvmppc_handler_trampoline_exit: 
	PPC_LL	r2, (SHADOW_VCPU_OFF + SVCPU_HOST_R2)(r13)



	/* Save guest PC and MSR */

#ifdef CONFIG_PPC64

BEGIN_FTR_SECTION

	andi.	r0,r12,0x2

	beq	1f

	mfspr	r3,SPRN_HSRR0

	mfspr	r4,SPRN_HSRR1

	andi.	r12,r12,0x3ffd

	b	2f

END_FTR_SECTION_IFSET(CPU_FTR_HVMODE_206)

#endif

1:	mfsrr0	r3

	mfsrr1	r4

2:

arch/powerpc/platforms/iseries/exception.S

+1 −1
Original line number Diff line number Diff line
@@ -167,7 +167,7 @@ BEGIN_FTR_SECTION 
	std	r12,PACA_EXGEN+EX_R13(r13)

	EXCEPTION_PROLOG_ISERIES_1

FTR_SECTION_ELSE

	EXCEPTION_PROLOG_1(PACA_EXGEN)

	EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0)

	EXCEPTION_PROLOG_ISERIES_1

ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_SLB)

	b	data_access_common

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