diff options
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 1136 |
1 files changed, 765 insertions, 371 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 4665e82fa37..a7d36b19221 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -54,14 +54,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ xori r12,r12,MSR_LE ; \ mtspr SPRN_SRR1,r12 ; \ rfid ; /* return to userspace */ \ - b . ; \ -2: mfspr r12,SPRN_SRR1 ; \ - andi. r12,r12,MSR_PR ; \ - bne 0b ; \ - mtspr SPRN_SRR0,r3 ; \ - mtspr SPRN_SRR1,r4 ; \ - mtspr SPRN_SDR1,r5 ; \ - rfid ; \ b . ; /* prevent speculative execution */ #if defined(CONFIG_RELOCATABLE) @@ -74,13 +66,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ mflr r10 ; \ ld r12,PACAKBASE(r13) ; \ LOAD_HANDLER(r12, system_call_entry_direct) ; \ - mtlr r12 ; \ + mtctr r12 ; \ mfspr r12,SPRN_SRR1 ; \ /* Re-use of r13... No spare regs to do this */ \ li r13,MSR_RI ; \ mtmsrd r13,1 ; \ GET_PACA(r13) ; /* get r13 back */ \ - blr ; + bctr ; #else /* We can branch directly */ #define SYSCALL_PSERIES_2_DIRECT \ @@ -104,7 +96,7 @@ __start_interrupts: .globl system_reset_pSeries; system_reset_pSeries: - HMT_MEDIUM; + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) #ifdef CONFIG_PPC_P7_NAP BEGIN_FTR_SECTION @@ -121,12 +113,13 @@ BEGIN_FTR_SECTION cmpwi cr1,r13,2 /* Total loss of HV state is fatal, we could try to use the * PIR to locate a PACA, then use an emergency stack etc... - * but for now, let's just stay stuck here + * OPAL v3 based powernv platforms have new idle states + * which fall in this catagory. */ - bgt cr1,. + bgt cr1,8f GET_PACA(r13) -#ifdef CONFIG_KVM_BOOK3S_64_HV +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE li r0,KVM_HWTHREAD_IN_KERNEL stb r0,HSTATE_HWTHREAD_STATE(r13) /* Order setting hwthread_state vs. testing hwthread_req */ @@ -139,8 +132,13 @@ BEGIN_FTR_SECTION #endif beq cr1,2f - b .power7_wakeup_noloss -2: b .power7_wakeup_loss + b power7_wakeup_noloss +2: b power7_wakeup_loss + + /* Fast Sleep wakeup on PowerNV */ +8: GET_PACA(r13) + b power7_wakeup_tb_loss + 9: END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) #endif /* CONFIG_PPC_P7_NAP */ @@ -153,12 +151,42 @@ machine_check_pSeries_1: * some code path might still want to branch into the original * vector */ - b machine_check_pSeries + HMT_MEDIUM_PPR_DISCARD + SET_SCRATCH0(r13) /* save r13 */ +#ifdef CONFIG_PPC_P7_NAP +BEGIN_FTR_SECTION + /* Running native on arch 2.06 or later, check if we are + * waking up from nap. We only handle no state loss and + * supervisor state loss. We do -not- handle hypervisor + * state loss at this time. + */ + mfspr r13,SPRN_SRR1 + rlwinm. r13,r13,47-31,30,31 + OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) + beq 9f + + mfspr r13,SPRN_SRR1 + rlwinm. r13,r13,47-31,30,31 + /* waking up from powersave (nap) state */ + cmpwi cr1,r13,2 + /* Total loss of HV state is fatal. let's just stay stuck here */ + OPT_GET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) + bgt cr1,. +9: + OPT_SET_SPR(r13, SPRN_CFAR, CPU_FTR_CFAR) +END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) +#endif /* CONFIG_PPC_P7_NAP */ + EXCEPTION_PROLOG_0(PACA_EXMC) +BEGIN_FTR_SECTION + b machine_check_pSeries_early +FTR_SECTION_ELSE + b machine_check_pSeries_0 +ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) . = 0x300 .globl data_access_pSeries data_access_pSeries: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) BEGIN_FTR_SECTION b data_access_check_stab @@ -170,8 +198,9 @@ END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB) . = 0x380 .globl data_access_slb_pSeries data_access_slb_pSeries: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXSLB) EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380) std r3,PACA_EXSLB+EX_R3(r13) mfspr r3,SPRN_DAR @@ -182,16 +211,16 @@ data_access_slb_pSeries: #endif /* __DISABLED__ */ mfspr r12,SPRN_SRR1 #ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode + b slb_miss_realmode #else /* - * We can't just use a direct branch to .slb_miss_realmode + * We can't just use a direct branch to slb_miss_realmode * because the distance from here to there depends on where * the kernel ends up being put. */ mfctr r11 ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) + LOAD_HANDLER(r10, slb_miss_realmode) mtctr r10 bctr #endif @@ -201,8 +230,9 @@ data_access_slb_pSeries: . = 0x480 .globl instruction_access_slb_pSeries instruction_access_slb_pSeries: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXSLB) EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480) std r3,PACA_EXSLB+EX_R3(r13) mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ @@ -213,11 +243,11 @@ instruction_access_slb_pSeries: #endif /* __DISABLED__ */ mfspr r12,SPRN_SRR1 #ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode + b slb_miss_realmode #else mfctr r11 ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) + LOAD_HANDLER(r10, slb_miss_realmode) mtctr r10 bctr #endif @@ -230,6 +260,7 @@ instruction_access_slb_pSeries: .globl hardware_interrupt_hv; hardware_interrupt_pSeries: hardware_interrupt_hv: + HMT_MEDIUM_PPR_DISCARD BEGIN_FTR_SECTION _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) @@ -249,10 +280,14 @@ hardware_interrupt_hv: STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) - MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer) + . = 0x900 + .globl decrementer_pSeries +decrementer_pSeries: + _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR) + STD_EXCEPTION_HV(0x980, 0x982, hdecrementer) - STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a) + MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00) STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b) @@ -283,34 +318,70 @@ system_call_pSeries: * out of line to handle them */ . = 0xe00 -hv_exception_trampoline: +hv_data_storage_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b h_data_storage_hv + . = 0xe20 +hv_instr_storage_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b h_instr_storage_hv + . = 0xe40 +emulation_assist_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b emulation_assist_hv - . = 0xe50 - b hmi_exception_hv + . = 0xe60 +hv_exception_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b hmi_exception_hv + . = 0xe80 +hv_doorbell_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b h_doorbell_hv + /* We need to deal with the Altivec unavailable exception * here which is at 0xf20, thus in the middle of the * prolog code of the PerformanceMonitor one. A little * trickery is thus necessary */ -performance_monitor_pSeries_1: . = 0xf00 +performance_monitor_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b performance_monitor_pSeries -altivec_unavailable_pSeries_1: . = 0xf20 +altivec_unavailable_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b altivec_unavailable_pSeries -vsx_unavailable_pSeries_1: . = 0xf40 +vsx_unavailable_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b vsx_unavailable_pSeries + . = 0xf60 +facility_unavailable_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b facility_unavailable_pSeries + + . = 0xf80 +hv_facility_unavailable_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b facility_unavailable_hv + #ifdef CONFIG_CBE_RAS STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error) KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202) @@ -322,16 +393,10 @@ vsx_unavailable_pSeries_1: . = 0x1500 .global denorm_exception_hv denorm_exception_hv: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD mtspr SPRN_SPRG_HSCRATCH0,r13 - mfspr r13,SPRN_SPRG_HPACA - std r9,PACA_EXGEN+EX_R9(r13) - std r10,PACA_EXGEN+EX_R10(r13) - std r11,PACA_EXGEN+EX_R11(r13) - std r12,PACA_EXGEN+EX_R12(r13) - mfspr r9,SPRN_SPRG_HSCRATCH0 - std r9,PACA_EXGEN+EX_R13(r13) - mfcr r9 + EXCEPTION_PROLOG_0(PACA_EXGEN) + EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) #ifdef CONFIG_PPC_DENORMALISATION mfspr r10,SPRN_HSRR1 @@ -341,6 +406,7 @@ denorm_exception_hv: bne+ denorm_assist #endif + KVMTEST(0x1500) EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500) @@ -364,13 +430,89 @@ denorm_exception_hv: .align 7 /* moved from 0x200 */ +machine_check_pSeries_early: +BEGIN_FTR_SECTION + EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200) + /* + * Register contents: + * R13 = PACA + * R9 = CR + * Original R9 to R13 is saved on PACA_EXMC + * + * Switch to mc_emergency stack and handle re-entrancy (we limit + * the nested MCE upto level 4 to avoid stack overflow). + * Save MCE registers srr1, srr0, dar and dsisr and then set ME=1 + * + * We use paca->in_mce to check whether this is the first entry or + * nested machine check. We increment paca->in_mce to track nested + * machine checks. + * + * If this is the first entry then set stack pointer to + * paca->mc_emergency_sp, otherwise r1 is already pointing to + * stack frame on mc_emergency stack. + * + * NOTE: We are here with MSR_ME=0 (off), which means we risk a + * checkstop if we get another machine check exception before we do + * rfid with MSR_ME=1. + */ + mr r11,r1 /* Save r1 */ + lhz r10,PACA_IN_MCE(r13) + cmpwi r10,0 /* Are we in nested machine check */ + bne 0f /* Yes, we are. */ + /* First machine check entry */ + ld r1,PACAMCEMERGSP(r13) /* Use MC emergency stack */ +0: subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ + addi r10,r10,1 /* increment paca->in_mce */ + sth r10,PACA_IN_MCE(r13) + /* Limit nested MCE to level 4 to avoid stack overflow */ + cmpwi r10,4 + bgt 2f /* Check if we hit limit of 4 */ + std r11,GPR1(r1) /* Save r1 on the stack. */ + std r11,0(r1) /* make stack chain pointer */ + mfspr r11,SPRN_SRR0 /* Save SRR0 */ + std r11,_NIP(r1) + mfspr r11,SPRN_SRR1 /* Save SRR1 */ + std r11,_MSR(r1) + mfspr r11,SPRN_DAR /* Save DAR */ + std r11,_DAR(r1) + mfspr r11,SPRN_DSISR /* Save DSISR */ + std r11,_DSISR(r1) + std r9,_CCR(r1) /* Save CR in stackframe */ + /* Save r9 through r13 from EXMC save area to stack frame. */ + EXCEPTION_PROLOG_COMMON_2(PACA_EXMC) + mfmsr r11 /* get MSR value */ + ori r11,r11,MSR_ME /* turn on ME bit */ + ori r11,r11,MSR_RI /* turn on RI bit */ + ld r12,PACAKBASE(r13) /* get high part of &label */ + LOAD_HANDLER(r12, machine_check_handle_early) +1: mtspr SPRN_SRR0,r12 + mtspr SPRN_SRR1,r11 + rfid + b . /* prevent speculative execution */ +2: + /* Stack overflow. Stay on emergency stack and panic. + * Keep the ME bit off while panic-ing, so that if we hit + * another machine check we checkstop. + */ + addi r1,r1,INT_FRAME_SIZE /* go back to previous stack frame */ + ld r11,PACAKMSR(r13) + ld r12,PACAKBASE(r13) + LOAD_HANDLER(r12, unrecover_mce) + li r10,MSR_ME + andc r11,r11,r10 /* Turn off MSR_ME */ + b 1b + b . /* prevent speculative execution */ +END_FTR_SECTION_IFSET(CPU_FTR_HVMODE) + machine_check_pSeries: .globl machine_check_fwnmi machine_check_fwnmi: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) /* save r13 */ - EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common, - EXC_STD, KVMTEST, 0x200) + EXCEPTION_PROLOG_0(PACA_EXMC) +machine_check_pSeries_0: + EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200) + EXCEPTION_PROLOG_PSERIES_1(machine_check_common, EXC_STD) KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200) /* moved from 0x300 */ @@ -382,7 +524,7 @@ data_access_check_stab: mfspr r9,SPRN_DSISR srdi r10,r10,60 rlwimi r10,r9,16,0x20 -#ifdef CONFIG_KVM_BOOK3S_PR +#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE lbz r9,HSTATE_IN_GUEST(r13) rlwimi r10,r9,8,0x300 #endif @@ -398,7 +540,7 @@ do_stab_bolted_pSeries: 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) + EXCEPTION_PROLOG_PSERIES_1(do_stab_bolted, EXC_STD) KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300) KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380) @@ -419,38 +561,14 @@ BEGIN_FTR_SECTION xori r10,r10,(MSR_FE0|MSR_FE1) mtmsrd r10 sync - fmr 0,0 - fmr 1,1 - fmr 2,2 - fmr 3,3 - fmr 4,4 - fmr 5,5 - fmr 6,6 - fmr 7,7 - fmr 8,8 - fmr 9,9 - fmr 10,10 - fmr 11,11 - fmr 12,12 - fmr 13,13 - fmr 14,14 - fmr 15,15 - fmr 16,16 - fmr 17,17 - fmr 18,18 - fmr 19,19 - fmr 20,20 - fmr 21,21 - fmr 22,22 - fmr 23,23 - fmr 24,24 - fmr 25,25 - fmr 26,26 - fmr 27,27 - fmr 28,28 - fmr 29,29 - fmr 30,30 - fmr 31,31 + +#define FMR2(n) fmr (n), (n) ; fmr n+1, n+1 +#define FMR4(n) FMR2(n) ; FMR2(n+2) +#define FMR8(n) FMR4(n) ; FMR4(n+4) +#define FMR16(n) FMR8(n) ; FMR8(n+8) +#define FMR32(n) FMR16(n) ; FMR16(n+16) + FMR32(0) + FTR_SECTION_ELSE /* * To denormalise we need to move a copy of the register to itself. @@ -460,42 +578,33 @@ FTR_SECTION_ELSE oris r10,r10,MSR_VSX@h mtmsrd r10 sync - XVCPSGNDP(0,0,0) - XVCPSGNDP(1,1,1) - XVCPSGNDP(2,2,2) - XVCPSGNDP(3,3,3) - XVCPSGNDP(4,4,4) - XVCPSGNDP(5,5,5) - XVCPSGNDP(6,6,6) - XVCPSGNDP(7,7,7) - XVCPSGNDP(8,8,8) - XVCPSGNDP(9,9,9) - XVCPSGNDP(10,10,10) - XVCPSGNDP(11,11,11) - XVCPSGNDP(12,12,12) - XVCPSGNDP(13,13,13) - XVCPSGNDP(14,14,14) - XVCPSGNDP(15,15,15) - XVCPSGNDP(16,16,16) - XVCPSGNDP(17,17,17) - XVCPSGNDP(18,18,18) - XVCPSGNDP(19,19,19) - XVCPSGNDP(20,20,20) - XVCPSGNDP(21,21,21) - XVCPSGNDP(22,22,22) - XVCPSGNDP(23,23,23) - XVCPSGNDP(24,24,24) - XVCPSGNDP(25,25,25) - XVCPSGNDP(26,26,26) - XVCPSGNDP(27,27,27) - XVCPSGNDP(28,28,28) - XVCPSGNDP(29,29,29) - XVCPSGNDP(30,30,30) - XVCPSGNDP(31,31,31) + +#define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1) +#define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2) +#define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4) +#define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8) +#define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16) + XVCPSGNDP32(0) + ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) + +BEGIN_FTR_SECTION + b denorm_done +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) +/* + * To denormalise we need to move a copy of the register to itself. + * For POWER8 we need to do that for all 64 VSX registers + */ + XVCPSGNDP32(32) +denorm_done: mtspr SPRN_HSRR0,r11 mtcrf 0x80,r9 ld r9,PACA_EXGEN+EX_R9(r13) + RESTORE_PPR_PACA(PACA_EXGEN, r10) +BEGIN_FTR_SECTION + ld r10,PACA_EXGEN+EX_CFAR(r13) + mtspr SPRN_CFAR,r10 +END_FTR_SECTION_IFSET(CPU_FTR_CFAR) ld r10,PACA_EXGEN+EX_R10(r13) ld r11,PACA_EXGEN+EX_R11(r13) ld r12,PACA_EXGEN+EX_R12(r13) @@ -506,28 +615,36 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206) .align 7 /* moved from 0xe00 */ - STD_EXCEPTION_HV(., 0xe02, h_data_storage) + STD_EXCEPTION_HV_OOL(0xe02, h_data_storage) KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02) - STD_EXCEPTION_HV(., 0xe22, h_instr_storage) + STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage) KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22) - STD_EXCEPTION_HV(., 0xe42, emulation_assist) + STD_EXCEPTION_HV_OOL(0xe42, emulation_assist) KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42) - STD_EXCEPTION_HV(., 0xe62, hmi_exception) /* need to flush cache ? */ + STD_EXCEPTION_HV_OOL(0xe62, hmi_exception) /* need to flush cache ? */ KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62) + MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell) + KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82) /* moved from 0xf00 */ - STD_EXCEPTION_PSERIES(., 0xf00, performance_monitor) + STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00) - STD_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable) + STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20) - STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable) + STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40) + STD_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) + KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf60) + STD_EXCEPTION_HV_OOL(0xf82, facility_unavailable) + KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xf82) /* - * An interrupt came in while soft-disabled. We set paca->irq_happened, - * then, if it was a decrementer interrupt, we bump the dec to max and - * and return, else we hard disable and return. This is called with - * r10 containing the value to OR to the paca field. + * An interrupt came in while soft-disabled. We set paca->irq_happened, then: + * - If it was a decrementer interrupt, we bump the dec to max and and return. + * - If it was a doorbell we return immediately since doorbells are edge + * triggered and won't automatically refire. + * - else we hard disable and return. + * This is called with r10 containing the value to OR to the paca field. */ #define MASKED_INTERRUPT(_H) \ masked_##_H##interrupt: \ @@ -535,13 +652,15 @@ masked_##_H##interrupt: \ lbz r11,PACAIRQHAPPENED(r13); \ or r11,r11,r10; \ stb r11,PACAIRQHAPPENED(r13); \ - andi. r10,r10,PACA_IRQ_DEC; \ - beq 1f; \ + cmpwi r10,PACA_IRQ_DEC; \ + bne 1f; \ lis r10,0x7fff; \ ori r10,r10,0xffff; \ mtspr SPRN_DEC,r10; \ b 2f; \ -1: mfspr r10,SPRN_##_H##SRR1; \ +1: cmpwi r10,PACA_IRQ_DBELL; \ + beq 2f; \ + mfspr r10,SPRN_##_H##SRR1; \ rldicl r10,r10,48,1; /* clear MSR_EE */ \ rotldi r10,r10,16; \ mtspr SPRN_##_H##SRR1,r10; \ @@ -558,8 +677,8 @@ masked_##_H##interrupt: \ /* * Called from arch_local_irq_enable when an interrupt needs - * to be resent. r3 contains 0x500 or 0x900 to indicate which - * kind of interrupt. MSR:EE is already off. We generate a + * to be resent. r3 contains 0x500, 0x900, 0xa00 or 0xe80 to indicate + * which kind of interrupt. MSR:EE is already off. We generate a * stackframe like if a real interrupt had happened. * * Note: While MSR:EE is off, we need to make sure that _MSR @@ -575,9 +694,18 @@ _GLOBAL(__replay_interrupt) mflr r11 mfcr r9 ori r12,r12,MSR_EE - andi. r3,r3,0x0800 - bne decrementer_common - b hardware_interrupt_common + cmpwi r3,0x900 + beq decrementer_common + cmpwi r3,0x500 + beq hardware_interrupt_common +BEGIN_FTR_SECTION + cmpwi r3,0xe80 + beq h_doorbell_common +FTR_SECTION_ELSE + cmpwi r3,0xa00 + beq doorbell_super_common +ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) + blr #ifdef CONFIG_PPC_PSERIES /* @@ -586,7 +714,7 @@ _GLOBAL(__replay_interrupt) .globl system_reset_fwnmi .align 7 system_reset_fwnmi: - HMT_MEDIUM + HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) /* save r13 */ EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, NOTEST, 0x100) @@ -621,6 +749,32 @@ slb_miss_user_pseries: b . /* prevent spec. execution */ #endif /* __DISABLED__ */ +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER +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 . +#endif + /* * Code from here down to __end_handlers is invoked from the * exception prologs above. Because the prologs assemble the @@ -631,44 +785,38 @@ slb_miss_user_pseries: /*** Common interrupt handlers ***/ - STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception) - - /* - * Machine check is different because we use a different - * save area: PACA_EXMC instead of PACA_EXGEN. - */ - .align 7 - .globl machine_check_common -machine_check_common: - EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) - FINISH_NAP - DISABLE_INTS - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - bl .machine_check_exception - b .ret_from_except + STD_EXCEPTION_COMMON(0x100, system_reset, system_reset_exception) STD_EXCEPTION_COMMON_ASYNC(0x500, hardware_interrupt, do_IRQ) - STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, .timer_interrupt) - STD_EXCEPTION_COMMON(0x980, hdecrementer, .hdec_interrupt) - STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception) - STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception) - STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception) - STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception) - STD_EXCEPTION_COMMON(0xe40, emulation_assist, .program_check_exception) - STD_EXCEPTION_COMMON(0xe60, hmi_exception, .unknown_exception) - STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, .performance_monitor_exception) - STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, .instruction_breakpoint_exception) - STD_EXCEPTION_COMMON(0x1502, denorm, .unknown_exception) + STD_EXCEPTION_COMMON_ASYNC(0x900, decrementer, timer_interrupt) + STD_EXCEPTION_COMMON(0x980, hdecrementer, hdec_interrupt) +#ifdef CONFIG_PPC_DOORBELL + STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, doorbell_exception) +#else + STD_EXCEPTION_COMMON_ASYNC(0xa00, doorbell_super, unknown_exception) +#endif + STD_EXCEPTION_COMMON(0xb00, trap_0b, unknown_exception) + STD_EXCEPTION_COMMON(0xd00, single_step, single_step_exception) + STD_EXCEPTION_COMMON(0xe00, trap_0e, unknown_exception) + STD_EXCEPTION_COMMON(0xe40, emulation_assist, emulation_assist_interrupt) + STD_EXCEPTION_COMMON(0xe60, hmi_exception, unknown_exception) +#ifdef CONFIG_PPC_DOORBELL + STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, doorbell_exception) +#else + STD_EXCEPTION_COMMON_ASYNC(0xe80, h_doorbell, unknown_exception) +#endif + STD_EXCEPTION_COMMON_ASYNC(0xf00, performance_monitor, performance_monitor_exception) + STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, instruction_breakpoint_exception) + STD_EXCEPTION_COMMON(0x1502, denorm, unknown_exception) #ifdef CONFIG_ALTIVEC - STD_EXCEPTION_COMMON(0x1700, altivec_assist, .altivec_assist_exception) + STD_EXCEPTION_COMMON(0x1700, altivec_assist, altivec_assist_exception) #else - STD_EXCEPTION_COMMON(0x1700, altivec_assist, .unknown_exception) + STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception) #endif #ifdef CONFIG_CBE_RAS - STD_EXCEPTION_COMMON(0x1200, cbe_system_error, .cbe_system_error_exception) - STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, .cbe_maintenance_exception) - STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception) + STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception) + STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception) + STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception) #endif /* CONFIG_CBE_RAS */ /* @@ -690,23 +838,23 @@ machine_check_common: . = 0x4380 .globl data_access_slb_relon_pSeries data_access_slb_relon_pSeries: - HMT_MEDIUM SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXSLB) EXCEPTION_PROLOG_1(PACA_EXSLB, NOTEST, 0x380) std r3,PACA_EXSLB+EX_R3(r13) mfspr r3,SPRN_DAR mfspr r12,SPRN_SRR1 #ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode + b slb_miss_realmode #else /* - * We can't just use a direct branch to .slb_miss_realmode + * We can't just use a direct branch to slb_miss_realmode * because the distance from here to there depends on where * the kernel ends up being put. */ mfctr r11 ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) + LOAD_HANDLER(r10, slb_miss_realmode) mtctr r10 bctr #endif @@ -715,18 +863,18 @@ data_access_slb_relon_pSeries: . = 0x4480 .globl instruction_access_slb_relon_pSeries instruction_access_slb_relon_pSeries: - HMT_MEDIUM 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 #ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode + b slb_miss_realmode #else mfctr r11 ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) + LOAD_HANDLER(r10, slb_miss_realmode) mtctr r10 bctr #endif @@ -740,12 +888,13 @@ hardware_interrupt_relon_hv: _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) FTR_SECTION_ELSE _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR) - ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_206) + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment) STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check) STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable) MASKABLE_RELON_EXCEPTION_PSERIES(0x4900, 0x900, decrementer) STD_RELON_EXCEPTION_HV(0x4980, 0x982, hdecrementer) + MASKABLE_RELON_EXCEPTION_PSERIES(0x4a00, 0xa00, doorbell_super) STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b) . = 0x4c00 @@ -759,56 +908,62 @@ system_call_relon_pSeries: STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step) . = 0x4e00 - b h_data_storage_relon_hv + b . /* Can't happen, see v2.07 Book III-S section 6.5 */ . = 0x4e20 - b h_instr_storage_relon_hv + b . /* Can't happen, see v2.07 Book III-S section 6.5 */ . = 0x4e40 +emulation_assist_relon_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b emulation_assist_relon_hv - . = 0x4e50 - b hmi_exception_relon_hv - . = 0x4e60 - b hmi_exception_relon_hv + b . /* Can't happen, see v2.07 Book III-S section 6.5 */ - /* For when we support the doorbell interrupt: - STD_RELON_EXCEPTION_HYPERVISOR(0x4e80, 0xe80, doorbell_hyper) - */ + . = 0x4e80 +h_doorbell_relon_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b h_doorbell_relon_hv -performance_monitor_relon_pSeries_1: . = 0x4f00 +performance_monitor_relon_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b performance_monitor_relon_pSeries -altivec_unavailable_relon_pSeries_1: . = 0x4f20 +altivec_unavailable_relon_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b altivec_unavailable_relon_pSeries -vsx_unavailable_relon_pSeries_1: . = 0x4f40 +vsx_unavailable_relon_pseries_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) b vsx_unavailable_relon_pSeries -#ifdef CONFIG_CBE_RAS - STD_RELON_EXCEPTION_HV(0x5200, 0x1202, cbe_system_error) -#endif /* CONFIG_CBE_RAS */ + . = 0x4f60 +facility_unavailable_relon_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b facility_unavailable_relon_pSeries + + . = 0x4f80 +hv_facility_unavailable_relon_trampoline: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b hv_facility_unavailable_relon_hv + STD_RELON_EXCEPTION_PSERIES(0x5300, 0x1300, instruction_breakpoint) #ifdef CONFIG_PPC_DENORMALISATION . = 0x5500 b denorm_exception_hv #endif -#ifdef CONFIG_CBE_RAS - STD_RELON_EXCEPTION_HV(0x5600, 0x1602, cbe_maintenance) -#else -#ifdef CONFIG_HVC_SCOM - STD_RELON_EXCEPTION_HV(0x5600, 0x1600, maintence_interrupt) - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1600) -#endif /* CONFIG_HVC_SCOM */ -#endif /* CONFIG_CBE_RAS */ STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist) -#ifdef CONFIG_CBE_RAS - STD_RELON_EXCEPTION_HV(0x5800, 0x1802, cbe_thermal) -#endif /* CONFIG_CBE_RAS */ /* Other future vectors */ .align 7 @@ -827,7 +982,7 @@ system_call_entry: b system_call_common ppc64_runlatch_on_trampoline: - b .__ppc64_runlatch_on + b __ppc64_runlatch_on /* * Here we have detected that the kernel stack pointer is bad. @@ -886,7 +1041,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR) std r12,RESULT(r1) std r11,STACK_FRAME_OVERHEAD-16(r1) 1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .kernel_bad_stack + bl kernel_bad_stack b 1b /* @@ -907,7 +1062,7 @@ data_access_common: ld r3,PACA_EXGEN+EX_DAR(r13) lwz r4,PACA_EXGEN+EX_DSISR(r13) li r5,0x300 - b .do_hash_page /* Try to handle as hpte fault */ + b do_hash_page /* Try to handle as hpte fault */ .align 7 .globl h_data_storage_common @@ -917,11 +1072,11 @@ h_data_storage_common: mfspr r10,SPRN_HDSISR stw r10,PACA_EXGEN+EX_DSISR(r13) EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) - bl .save_nvgprs + bl save_nvgprs DISABLE_INTS addi r3,r1,STACK_FRAME_OVERHEAD - bl .unknown_exception - b .ret_from_except + bl unknown_exception + b ret_from_except .align 7 .globl instruction_access_common @@ -932,9 +1087,9 @@ instruction_access_common: ld r3,_NIP(r1) andis. r4,r12,0x5820 li r5,0x400 - b .do_hash_page /* Try to handle as hpte fault */ + b do_hash_page /* Try to handle as hpte fault */ - STD_EXCEPTION_COMMON(0xe20, h_instr_storage, .unknown_exception) + STD_EXCEPTION_COMMON(0xe20, h_instr_storage, unknown_exception) /* * Here is the common SLB miss user that is used when going to virtual @@ -949,7 +1104,7 @@ slb_miss_user_common: stw r9,PACA_EXGEN+EX_CCR(r13) std r10,PACA_EXGEN+EX_LR(r13) std r11,PACA_EXGEN+EX_SRR0(r13) - bl .slb_allocate_user + bl slb_allocate_user ld r10,PACA_EXGEN+EX_LR(r13) ld r3,PACA_EXGEN+EX_R3(r13) @@ -992,14 +1147,369 @@ slb_miss_fault: unrecov_user_slb: EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) DISABLE_INTS - bl .save_nvgprs + bl save_nvgprs 1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .unrecoverable_exception + bl unrecoverable_exception b 1b #endif /* __DISABLED__ */ + /* + * Machine check is different because we use a different + * save area: PACA_EXMC instead of PACA_EXGEN. + */ + .align 7 + .globl machine_check_common +machine_check_common: + + mfspr r10,SPRN_DAR + std r10,PACA_EXGEN+EX_DAR(r13) + mfspr r10,SPRN_DSISR + stw r10,PACA_EXGEN+EX_DSISR(r13) + EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) + FINISH_NAP + DISABLE_INTS + ld r3,PACA_EXGEN+EX_DAR(r13) + lwz r4,PACA_EXGEN+EX_DSISR(r13) + std r3,_DAR(r1) + std r4,_DSISR(r1) + bl save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + bl machine_check_exception + b ret_from_except + + .align 7 + .globl alignment_common +alignment_common: + mfspr r10,SPRN_DAR + std r10,PACA_EXGEN+EX_DAR(r13) + mfspr r10,SPRN_DSISR + stw r10,PACA_EXGEN+EX_DSISR(r13) + EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) + ld r3,PACA_EXGEN+EX_DAR(r13) + lwz r4,PACA_EXGEN+EX_DSISR(r13) + std r3,_DAR(r1) + std r4,_DSISR(r1) + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl alignment_exception + b ret_from_except + + .align 7 + .globl program_check_common +program_check_common: + EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl program_check_exception + b ret_from_except + + .align 7 + .globl fp_unavailable_common +fp_unavailable_common: + EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) + bne 1f /* if from user, just load it up */ + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl kernel_fp_unavailable_exception + BUG_OPCODE +1: +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +BEGIN_FTR_SECTION + /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in + * transaction), go do TM stuff + */ + rldicl. r0, r12, (64-MSR_TS_LG), (64-2) + bne- 2f +END_FTR_SECTION_IFSET(CPU_FTR_TM) +#endif + bl load_up_fpu + b fast_exception_return +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +2: /* User process was in a transaction */ + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl fp_unavailable_tm + b ret_from_except +#endif + .align 7 + .globl altivec_unavailable_common +altivec_unavailable_common: + EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) +#ifdef CONFIG_ALTIVEC +BEGIN_FTR_SECTION + beq 1f +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + BEGIN_FTR_SECTION_NESTED(69) + /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in + * transaction), go do TM stuff + */ + rldicl. r0, r12, (64-MSR_TS_LG), (64-2) + bne- 2f + END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) +#endif + bl load_up_altivec + b fast_exception_return +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +2: /* User process was in a transaction */ + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl altivec_unavailable_tm + b ret_from_except +#endif +1: +END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) +#endif + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl altivec_unavailable_exception + b ret_from_except + + .align 7 + .globl vsx_unavailable_common +vsx_unavailable_common: + EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) +#ifdef CONFIG_VSX +BEGIN_FTR_SECTION + beq 1f +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + BEGIN_FTR_SECTION_NESTED(69) + /* Test if 2 TM state bits are zero. If non-zero (ie. userspace was in + * transaction), go do TM stuff + */ + rldicl. r0, r12, (64-MSR_TS_LG), (64-2) + bne- 2f + END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69) +#endif + b load_up_vsx +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +2: /* User process was in a transaction */ + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl vsx_unavailable_tm + b ret_from_except +#endif +1: +END_FTR_SECTION_IFSET(CPU_FTR_VSX) +#endif + bl save_nvgprs + DISABLE_INTS + addi r3,r1,STACK_FRAME_OVERHEAD + bl vsx_unavailable_exception + b ret_from_except + + STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception) + STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception) + + .align 7 + .globl __end_handlers +__end_handlers: + + /* Equivalents to the above handlers for relocation-on interrupt vectors */ + STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist) + MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell) + + STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) + STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) + STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) + STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) + STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable) + +#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) +/* + * Data area reserved for FWNMI option. + * This address (0x7000) is fixed by the RPA. + */ + .= 0x7000 + .globl fwnmi_data_area +fwnmi_data_area: + + /* pseries and powernv need to keep the whole page from + * 0x7000 to 0x8000 free for use by the firmware + */ + . = 0x8000 +#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ + +/* Space for CPU0's segment table */ + .balign 4096 + .globl initial_stab +initial_stab: + .space 4096 + +#ifdef CONFIG_PPC_POWERNV +_GLOBAL(opal_mc_secondary_handler) + HMT_MEDIUM_PPR_DISCARD + SET_SCRATCH0(r13) + GET_PACA(r13) + clrldi r3,r3,2 + tovirt(r3,r3) + std r3,PACA_OPAL_MC_EVT(r13) + ld r13,OPAL_MC_SRR0(r3) + mtspr SPRN_SRR0,r13 + ld r13,OPAL_MC_SRR1(r3) + mtspr SPRN_SRR1,r13 + ld r3,OPAL_MC_GPR3(r3) + GET_SCRATCH0(r13) + b machine_check_pSeries +#endif /* CONFIG_PPC_POWERNV */ + + +#define MACHINE_CHECK_HANDLER_WINDUP \ + /* Clear MSR_RI before setting SRR0 and SRR1. */\ + li r0,MSR_RI; \ + mfmsr r9; /* get MSR value */ \ + andc r9,r9,r0; \ + mtmsrd r9,1; /* Clear MSR_RI */ \ + /* Move original SRR0 and SRR1 into the respective regs */ \ + ld r9,_MSR(r1); \ + mtspr SPRN_SRR1,r9; \ + ld r3,_NIP(r1); \ + mtspr SPRN_SRR0,r3; \ + ld r9,_CTR(r1); \ + mtctr r9; \ + ld r9,_XER(r1); \ + mtxer r9; \ + ld r9,_LINK(r1); \ + mtlr r9; \ + REST_GPR(0, r1); \ + REST_8GPRS(2, r1); \ + REST_GPR(10, r1); \ + ld r11,_CCR(r1); \ + mtcr r11; \ + /* Decrement paca->in_mce. */ \ + lhz r12,PACA_IN_MCE(r13); \ + subi r12,r12,1; \ + sth r12,PACA_IN_MCE(r13); \ + REST_GPR(11, r1); \ + REST_2GPRS(12, r1); \ + /* restore original r1. */ \ + ld r1,GPR1(r1) + + /* + * Handle machine check early in real mode. We come here with + * ME=1, MMU (IR=0 and DR=0) off and using MC emergency stack. + */ + .align 7 + .globl machine_check_handle_early +machine_check_handle_early: + std r0,GPR0(r1) /* Save r0 */ + EXCEPTION_PROLOG_COMMON_3(0x200) + bl save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + bl machine_check_early + std r3,RESULT(r1) /* Save result */ + ld r12,_MSR(r1) +#ifdef CONFIG_PPC_P7_NAP + /* + * Check if thread was in power saving mode. We come here when any + * of the following is true: + * a. thread wasn't in power saving mode + * b. thread was in power saving mode with no state loss or + * supervisor state loss + * + * Go back to nap again if (b) is true. + */ + rlwinm. r11,r12,47-31,30,31 /* Was it in power saving mode? */ + beq 4f /* No, it wasn;t */ + /* Thread was in power saving mode. Go back to nap again. */ + cmpwi r11,2 + bne 3f + /* Supervisor state loss */ + li r0,1 + stb r0,PACA_NAPSTATELOST(r13) +3: bl machine_check_queue_event + MACHINE_CHECK_HANDLER_WINDUP + GET_PACA(r13) + ld r1,PACAR1(r13) + b power7_enter_nap_mode +4: +#endif + /* + * Check if we are coming from hypervisor userspace. If yes then we + * continue in host kernel in V mode to deliver the MC event. + */ + rldicl. r11,r12,4,63 /* See if MC hit while in HV mode. */ + beq 5f + andi. r11,r12,MSR_PR /* See if coming from user. */ + bne 9f /* continue in V mode if we are. */ + +5: +#ifdef CONFIG_KVM_BOOK3S_64_HV + /* + * We are coming from kernel context. Check if we are coming from + * guest. if yes, then we can continue. We will fall through + * do_kvm_200->kvmppc_interrupt to deliver the MC event to guest. + */ + lbz r11,HSTATE_IN_GUEST(r13) + cmpwi r11,0 /* Check if coming from guest */ + bne 9f /* continue if we are. */ +#endif + /* + * At this point we are not sure about what context we come from. + * Queue up the MCE event and return from the interrupt. + * But before that, check if this is an un-recoverable exception. + * If yes, then stay on emergency stack and panic. + */ + andi. r11,r12,MSR_RI + bne 2f +1: mfspr r11,SPRN_SRR0 + ld r10,PACAKBASE(r13) + LOAD_HANDLER(r10,unrecover_mce) + mtspr SPRN_SRR0,r10 + ld r10,PACAKMSR(r13) + /* + * We are going down. But there are chances that we might get hit by + * another MCE during panic path and we may run into unstable state + * with no way out. Hence, turn ME bit off while going down, so that + * when another MCE is hit during panic path, system will checkstop + * and hypervisor will get restarted cleanly by SP. + */ + li r3,MSR_ME + andc r10,r10,r3 /* Turn off MSR_ME */ + mtspr SPRN_SRR1,r10 + rfid + b . +2: + /* + * Check if we have successfully handled/recovered from error, if not + * then stay on emergency stack and panic. + */ + ld r3,RESULT(r1) /* Load result */ + cmpdi r3,0 /* see if we handled MCE successfully */ + + beq 1b /* if !handled then panic */ + /* + * Return from MC interrupt. + * Queue up the MCE event so that we can log it later, while + * returning from kernel or opal call. + */ + bl machine_check_queue_event + MACHINE_CHECK_HANDLER_WINDUP + rfid +9: + /* Deliver the machine check to host kernel in V mode. */ + MACHINE_CHECK_HANDLER_WINDUP + b machine_check_pSeries + +unrecover_mce: + /* Invoke machine_check_exception to print MCE event and panic. */ + addi r3,r1,STACK_FRAME_OVERHEAD + bl machine_check_exception + /* + * We will not reach here. Even if we did, there is no way out. Call + * unrecoverable_exception and die. + */ +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl unrecoverable_exception + b 1b /* * r13 points to the PACA, r9 contains the saved CR, * r12 contain the saved SRR1, SRR0 is still ready for return @@ -1008,7 +1518,7 @@ unrecov_user_slb: * r3 is saved in paca->slb_r3 * We assume we aren't going to take any exceptions during this procedure. */ -_GLOBAL(slb_miss_realmode) +slb_miss_realmode: mflr r10 #ifdef CONFIG_RELOCATABLE mtctr r11 @@ -1017,7 +1527,7 @@ _GLOBAL(slb_miss_realmode) stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ - bl .slb_allocate_realmode + bl slb_allocate_realmode /* All done -- return from exception. */ @@ -1036,6 +1546,7 @@ _GLOBAL(slb_miss_realmode) 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) @@ -1056,9 +1567,9 @@ _GLOBAL(slb_miss_realmode) unrecov_slb: EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) DISABLE_INTS - bl .save_nvgprs + bl save_nvgprs 1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .unrecoverable_exception + bl unrecoverable_exception b 1b @@ -1071,91 +1582,11 @@ power4_fixup_nap: blr #endif - .align 7 - .globl alignment_common -alignment_common: - mfspr r10,SPRN_DAR - std r10,PACA_EXGEN+EX_DAR(r13) - mfspr r10,SPRN_DSISR - stw r10,PACA_EXGEN+EX_DSISR(r13) - EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) - ld r3,PACA_EXGEN+EX_DAR(r13) - lwz r4,PACA_EXGEN+EX_DSISR(r13) - std r3,_DAR(r1) - std r4,_DSISR(r1) - bl .save_nvgprs - DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .alignment_exception - b .ret_from_except - - .align 7 - .globl program_check_common -program_check_common: - EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) - bl .save_nvgprs - DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .program_check_exception - b .ret_from_except - - .align 7 - .globl fp_unavailable_common -fp_unavailable_common: - EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) - bne 1f /* if from user, just load it up */ - bl .save_nvgprs - DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .kernel_fp_unavailable_exception - BUG_OPCODE -1: bl .load_up_fpu - b fast_exception_return - - .align 7 - .globl altivec_unavailable_common -altivec_unavailable_common: - EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) -#ifdef CONFIG_ALTIVEC -BEGIN_FTR_SECTION - beq 1f - bl .load_up_altivec - b fast_exception_return -1: -END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) -#endif - bl .save_nvgprs - DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .altivec_unavailable_exception - b .ret_from_except - - .align 7 - .globl vsx_unavailable_common -vsx_unavailable_common: - EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) -#ifdef CONFIG_VSX -BEGIN_FTR_SECTION - beq 1f - b .load_up_vsx -1: -END_FTR_SECTION_IFSET(CPU_FTR_VSX) -#endif - bl .save_nvgprs - DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .vsx_unavailable_exception - b .ret_from_except - - .align 7 - .globl __end_handlers -__end_handlers: - /* * Hash table stuff */ .align 7 -_STATIC(do_hash_page) +do_hash_page: std r3,_DAR(r1) std r4,_DSISR(r1) @@ -1192,7 +1623,7 @@ END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB) * * at return r3 = 0 for success, 1 for page fault, negative for error */ - bl .hash_page /* build HPTE if possible */ + bl hash_page /* build HPTE if possible */ cmpdi r3,0 /* see if hash_page succeeded */ /* Success */ @@ -1206,35 +1637,35 @@ handle_page_fault: 11: ld r4,_DAR(r1) ld r5,_DSISR(r1) addi r3,r1,STACK_FRAME_OVERHEAD - bl .do_page_fault + bl do_page_fault cmpdi r3,0 beq+ 12f - bl .save_nvgprs + bl save_nvgprs mr r5,r3 addi r3,r1,STACK_FRAME_OVERHEAD lwz r4,_DAR(r1) - bl .bad_page_fault - b .ret_from_except + bl bad_page_fault + b ret_from_except /* We have a data breakpoint exception - handle it */ handle_dabr_fault: - bl .save_nvgprs + bl save_nvgprs ld r4,_DAR(r1) ld r5,_DSISR(r1) addi r3,r1,STACK_FRAME_OVERHEAD - bl .do_dabr -12: b .ret_from_except_lite + bl do_break +12: b ret_from_except_lite /* We have a page fault that hash_page could handle but HV refused * the PTE insertion */ -13: bl .save_nvgprs +13: bl save_nvgprs mr r5,r3 addi r3,r1,STACK_FRAME_OVERHEAD ld r4,_DAR(r1) - bl .low_hash_fault - b .ret_from_except + bl low_hash_fault + b ret_from_except /* * We come here as a result of a DSI at a point where we don't want @@ -1243,16 +1674,16 @@ handle_dabr_fault: * were soft-disabled. We want to invoke the exception handler for * the access, or panic if there isn't a handler. */ -77: bl .save_nvgprs +77: bl save_nvgprs mr r4,r3 addi r3,r1,STACK_FRAME_OVERHEAD li r5,SIGSEGV - bl .bad_page_fault - b .ret_from_except + bl bad_page_fault + b ret_from_except /* here we have a segment miss */ do_ste_alloc: - bl .ste_allocate /* try to insert stab entry */ + bl ste_allocate /* try to insert stab entry */ cmpdi r3,0 bne- handle_page_fault b fast_exception_return @@ -1265,23 +1696,39 @@ do_ste_alloc: * We assume (DAR >> 60) == 0xc. */ .align 7 -_GLOBAL(do_stab_bolted) +do_stab_bolted: stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */ + mfspr r11,SPRN_DAR /* ea */ + + /* + * check for bad kernel/user address + * (ea & ~REGION_MASK) >= PGTABLE_RANGE + */ + rldicr. r9,r11,4,(63 - 46 - 4) + li r9,0 /* VSID = 0 for bad address */ + bne- 0f + + /* + * Calculate VSID: + * This is the kernel vsid, we take the top for context from + * the range. context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1 + * Here we know that (ea >> 60) == 0xc + */ + lis r9,(MAX_USER_CONTEXT + 1)@ha + addi r9,r9,(MAX_USER_CONTEXT + 1)@l + srdi r10,r11,SID_SHIFT + rldimi r10,r9,ESID_BITS,0 /* proto vsid */ + ASM_VSID_SCRAMBLE(r10, r9, 256M) + rldic r9,r10,12,16 /* r9 = vsid << 12 */ + +0: /* Hash to the primary group */ ld r10,PACASTABVIRT(r13) - mfspr r11,SPRN_DAR - srdi r11,r11,28 + srdi r11,r11,SID_SHIFT rldimi r10,r11,7,52 /* r10 = first ste of the group */ - /* Calculate VSID */ - /* This is a kernel address, so protovsid = ESID | 1 << 37 */ - li r9,0x1 - rldimi r11,r9,(CONTEXT_BITS + USER_ESID_BITS),0 - ASM_VSID_SCRAMBLE(r11, r9, 256M) - rldic r9,r11,12,16 /* r9 = vsid << 12 */ - /* Search the primary group for a free entry */ 1: ld r11,0(r10) /* Test valid bit of the current ste */ andi. r11,r11,0x80 @@ -1344,56 +1791,3 @@ _GLOBAL(do_stab_bolted) ld r13,PACA_EXSLB+EX_R13(r13) rfid b . /* prevent speculative execution */ - - - /* Equivalents to the above handlers for relocation-on interrupt vectors */ - STD_RELON_EXCEPTION_HV(., 0xe00, h_data_storage) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe00) - STD_RELON_EXCEPTION_HV(., 0xe20, h_instr_storage) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe20) - STD_RELON_EXCEPTION_HV(., 0xe40, emulation_assist) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe40) - STD_RELON_EXCEPTION_HV(., 0xe60, hmi_exception) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe60) - - STD_RELON_EXCEPTION_PSERIES(., 0xf00, performance_monitor) - STD_RELON_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable) - STD_RELON_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable) - -#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) -/* - * Data area reserved for FWNMI option. - * This address (0x7000) is fixed by the RPA. - */ - .= 0x7000 - .globl fwnmi_data_area -fwnmi_data_area: - - /* pseries and powernv need to keep the whole page from - * 0x7000 to 0x8000 free for use by the firmware - */ - . = 0x8000 -#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ - -/* Space for CPU0's segment table */ - .balign 4096 - .globl initial_stab -initial_stab: - .space 4096 - -#ifdef CONFIG_PPC_POWERNV -_GLOBAL(opal_mc_secondary_handler) - HMT_MEDIUM - SET_SCRATCH0(r13) - GET_PACA(r13) - clrldi r3,r3,2 - tovirt(r3,r3) - std r3,PACA_OPAL_MC_EVT(r13) - ld r13,OPAL_MC_SRR0(r3) - mtspr SPRN_SRR0,r13 - ld r13,OPAL_MC_SRR1(r3) - mtspr SPRN_SRR1,r13 - ld r3,OPAL_MC_GPR3(r3) - GET_SCRATCH0(r13) - b machine_check_pSeries -#endif /* CONFIG_PPC_POWERNV */ |