From 8d04631ad7cbbe27d058ae79e3d41009a8e006d1 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Wed, 21 Sep 2016 17:43:35 +1000 Subject: [PATCH] powerpc/64s: Consolidate Instruction Segment 0x480 interrupt Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/exceptions-64s.S | 224 ++++++++++++++++++----------------- 1 file changed, 113 insertions(+), 111 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 13eb8c7..d084b0e 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -629,6 +629,119 @@ EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x500) #endif EXC_REAL_END(instruction_access_slb, 0x480, 0x500) +EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x4500) + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXSLB) + EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480) + std r3,PACA_EXSLB+EX_R3(r13) + mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ + mfspr r12,SPRN_SRR1 + crclr 4*cr6+eq +#ifndef CONFIG_RELOCATABLE + b slb_miss_realmode +#else + mfctr r11 + LOAD_HANDLER(r10, slb_miss_realmode) + mtctr r10 + bctr +#endif +EXC_VIRT_END(instruction_access_slb, 0x4480, 0x4500) +TRAMP_KVM(PACA_EXSLB, 0x480) + + +/* This handler is used by both 0x380 and 0x480 slb miss interrupts */ +EXC_COMMON_BEGIN(slb_miss_realmode) + /* + * r13 points to the PACA, r9 contains the saved CR, + * r12 contain the saved SRR1, SRR0 is still ready for return + * r3 has the faulting address + * r9 - r13 are saved in paca->exslb. + * r3 is saved in paca->slb_r3 + * cr6.eq is set for a D-SLB miss, clear for a I-SLB miss + * We assume we aren't going to take any exceptions during this + * procedure. + */ + mflr r10 +#ifdef CONFIG_RELOCATABLE + mtctr r11 +#endif + + stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ + std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ + std r3,PACA_EXSLB+EX_DAR(r13) + + crset 4*cr0+eq +#ifdef CONFIG_PPC_STD_MMU_64 +BEGIN_MMU_FTR_SECTION + bl slb_allocate_realmode +END_MMU_FTR_SECTION_IFCLR(MMU_FTR_TYPE_RADIX) +#endif + + ld r10,PACA_EXSLB+EX_LR(r13) + ld r3,PACA_EXSLB+EX_R3(r13) + lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ + mtlr r10 + + beq 8f /* if bad address, make full stack frame */ + + andi. r10,r12,MSR_RI /* check for unrecoverable exception */ + beq- 2f + + /* All done -- return from exception. */ + +.machine push +.machine "power4" + mtcrf 0x80,r9 + mtcrf 0x02,r9 /* I/D indication is in cr6 */ + mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ +.machine pop + + RESTORE_PPR_PACA(PACA_EXSLB, r9) + ld r9,PACA_EXSLB+EX_R9(r13) + ld r10,PACA_EXSLB+EX_R10(r13) + ld r11,PACA_EXSLB+EX_R11(r13) + ld r12,PACA_EXSLB+EX_R12(r13) + ld r13,PACA_EXSLB+EX_R13(r13) + rfid + b . /* prevent speculative execution */ + +2: mfspr r11,SPRN_SRR0 + LOAD_HANDLER(r10,unrecov_slb) + mtspr SPRN_SRR0,r10 + ld r10,PACAKMSR(r13) + mtspr SPRN_SRR1,r10 + rfid + b . + +8: mfspr r11,SPRN_SRR0 + LOAD_HANDLER(r10,bad_addr_slb) + mtspr SPRN_SRR0,r10 + ld r10,PACAKMSR(r13) + mtspr SPRN_SRR1,r10 + rfid + b . + +EXC_COMMON_BEGIN(unrecov_slb) + EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) + RECONCILE_IRQ_STATE(r10, r11) + bl save_nvgprs +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl unrecoverable_exception + b 1b + +EXC_COMMON_BEGIN(bad_addr_slb) + EXCEPTION_PROLOG_COMMON(0x380, PACA_EXSLB) + RECONCILE_IRQ_STATE(r10, r11) + ld r3, PACA_EXSLB+EX_DAR(r13) + std r3, _DAR(r1) + beq cr6, 2f + li r10, 0x480 /* fix trap number for I-SLB miss */ + std r10, _TRAP(r1) +2: bl save_nvgprs + addi r3, r1, STACK_FRAME_OVERHEAD + bl slb_miss_bad_addr + b ret_from_except + EXC_REAL_BEGIN(hardware_interrupt, 0x500, 0x600) .globl hardware_interrupt_hv; hardware_interrupt_hv: @@ -790,7 +903,6 @@ EXC_REAL_NONE(0x1800, 0x1900) /*** Out of line interrupts support ***/ /* moved from 0x200 */ -TRAMP_KVM(PACA_EXSLB, 0x480) TRAMP_KVM(PACA_EXGEN, 0x900) TRAMP_KVM_HV(PACA_EXGEN, 0x980) @@ -1057,24 +1169,6 @@ EXC_COMMON(altivec_assist_common, 0x1700, unknown_exception) * come here. */ -EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x4500) - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXSLB) - EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x480) - std r3,PACA_EXSLB+EX_R3(r13) - mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ - mfspr r12,SPRN_SRR1 - crclr 4*cr6+eq -#ifndef CONFIG_RELOCATABLE - b slb_miss_realmode -#else - mfctr r11 - LOAD_HANDLER(r10, slb_miss_realmode) - mtctr r10 - bctr -#endif -EXC_VIRT_END(instruction_access_slb, 0x4480, 0x4500) - EXC_VIRT_BEGIN(hardware_interrupt, 0x4500, 0x4600) .globl hardware_interrupt_relon_hv; hardware_interrupt_relon_hv: @@ -1370,98 +1464,6 @@ hmi_exception_after_realmode: EXCEPTION_PROLOG_0(PACA_EXGEN) b tramp_real_hmi_exception -/* - * r13 points to the PACA, r9 contains the saved CR, - * r12 contain the saved SRR1, SRR0 is still ready for return - * r3 has the faulting address - * r9 - r13 are saved in paca->exslb. - * r3 is saved in paca->slb_r3 - * cr6.eq is set for a D-SLB miss, clear for a I-SLB miss - * We assume we aren't going to take any exceptions during this procedure. - */ -EXC_COMMON_BEGIN(slb_miss_realmode) - mflr r10 -#ifdef CONFIG_RELOCATABLE - mtctr r11 -#endif - - stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ - std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ - std r3,PACA_EXSLB+EX_DAR(r13) - - crset 4*cr0+eq -#ifdef CONFIG_PPC_STD_MMU_64 -BEGIN_MMU_FTR_SECTION - bl slb_allocate_realmode -END_MMU_FTR_SECTION_IFCLR(MMU_FTR_TYPE_RADIX) -#endif - - ld r10,PACA_EXSLB+EX_LR(r13) - ld r3,PACA_EXSLB+EX_R3(r13) - lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ - mtlr r10 - - beq 8f /* if bad address, make full stack frame */ - - andi. r10,r12,MSR_RI /* check for unrecoverable exception */ - beq- 2f - - /* All done -- return from exception. */ - -.machine push -.machine "power4" - mtcrf 0x80,r9 - mtcrf 0x02,r9 /* I/D indication is in cr6 */ - mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ -.machine pop - - RESTORE_PPR_PACA(PACA_EXSLB, r9) - ld r9,PACA_EXSLB+EX_R9(r13) - ld r10,PACA_EXSLB+EX_R10(r13) - ld r11,PACA_EXSLB+EX_R11(r13) - ld r12,PACA_EXSLB+EX_R12(r13) - ld r13,PACA_EXSLB+EX_R13(r13) - rfid - b . /* prevent speculative execution */ - -2: mfspr r11,SPRN_SRR0 - LOAD_HANDLER(r10,unrecov_slb) - mtspr SPRN_SRR0,r10 - ld r10,PACAKMSR(r13) - mtspr SPRN_SRR1,r10 - rfid - b . - -8: mfspr r11,SPRN_SRR0 - LOAD_HANDLER(r10,bad_addr_slb) - mtspr SPRN_SRR0,r10 - ld r10,PACAKMSR(r13) - mtspr SPRN_SRR1,r10 - rfid - b . - -EXC_COMMON_BEGIN(unrecov_slb) - EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) - RECONCILE_IRQ_STATE(r10, r11) - bl save_nvgprs -1: addi r3,r1,STACK_FRAME_OVERHEAD - bl unrecoverable_exception - b 1b - - -EXC_COMMON_BEGIN(bad_addr_slb) - EXCEPTION_PROLOG_COMMON(0x380, PACA_EXSLB) - RECONCILE_IRQ_STATE(r10, r11) - ld r3, PACA_EXSLB+EX_DAR(r13) - std r3, _DAR(r1) - beq cr6, 2f - li r10, 0x480 /* fix trap number for I-SLB miss */ - std r10, _TRAP(r1) -2: bl save_nvgprs - addi r3, r1, STACK_FRAME_OVERHEAD - bl slb_miss_bad_addr - b ret_from_except - #ifdef CONFIG_PPC_970_NAP TRAMP_REAL_BEGIN(power4_fixup_nap) andc r9,r9,r10 -- 2.7.4