diff options
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 308 |
1 files changed, 258 insertions, 50 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 10b658ad65e1..4665e82fa377 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -19,12 +19,76 @@ /* * We layout physical memory as follows: * 0x0000 - 0x00ff : Secondary processor spin code - * 0x0100 - 0x2fff : pSeries Interrupt prologs - * 0x3000 - 0x5fff : interrupt support common interrupt prologs - * 0x6000 - 0x6fff : Initial (CPU0) segment table + * 0x0100 - 0x17ff : pSeries Interrupt prologs + * 0x1800 - 0x4000 : interrupt support common interrupt prologs + * 0x4000 - 0x5fff : pSeries interrupts with IR=1,DR=1 + * 0x6000 - 0x6fff : more interrupt support including for IR=1,DR=1 * 0x7000 - 0x7fff : FWNMI data area - * 0x8000 - : Early init and support code + * 0x8000 - 0x8fff : Initial (CPU0) segment table + * 0x9000 - : Early init and support code */ + /* Syscall routine is used twice, in reloc-off and reloc-on paths */ +#define SYSCALL_PSERIES_1 \ +BEGIN_FTR_SECTION \ + cmpdi r0,0x1ebe ; \ + beq- 1f ; \ +END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ + mr r9,r13 ; \ + GET_PACA(r13) ; \ + mfspr r11,SPRN_SRR0 ; \ +0: + +#define SYSCALL_PSERIES_2_RFID \ + mfspr r12,SPRN_SRR1 ; \ + ld r10,PACAKBASE(r13) ; \ + LOAD_HANDLER(r10, system_call_entry) ; \ + mtspr SPRN_SRR0,r10 ; \ + ld r10,PACAKMSR(r13) ; \ + mtspr SPRN_SRR1,r10 ; \ + rfid ; \ + b . ; /* prevent speculative execution */ + +#define SYSCALL_PSERIES_3 \ + /* Fast LE/BE switch system call */ \ +1: mfspr r12,SPRN_SRR1 ; \ + 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) + /* + * We can't branch directly; in the direct case we use LR + * and system_call_entry restores LR. (We thus need to move + * LR to r10 in the RFID case too.) + */ +#define SYSCALL_PSERIES_2_DIRECT \ + mflr r10 ; \ + ld r12,PACAKBASE(r13) ; \ + LOAD_HANDLER(r12, system_call_entry_direct) ; \ + mtlr 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 ; +#else + /* We can branch directly */ +#define SYSCALL_PSERIES_2_DIRECT \ + mfspr r12,SPRN_SRR1 ; \ + li r10,MSR_RI ; \ + mtmsrd r10,1 ; /* Set RI (EE=0) */ \ + b system_call_entry_direct ; +#endif /* * This is the start of the interrupt handlers for pSeries @@ -207,31 +271,11 @@ system_call_pSeries: KVMTEST(0xc00) GET_SCRATCH0(r13) #endif -BEGIN_FTR_SECTION - cmpdi r0,0x1ebe - beq- 1f -END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) - mr r9,r13 - GET_PACA(r13) - mfspr r11,SPRN_SRR0 - mfspr r12,SPRN_SRR1 - ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, system_call_entry) - mtspr SPRN_SRR0,r10 - ld r10,PACAKMSR(r13) - mtspr SPRN_SRR1,r10 - rfid - b . /* prevent speculative execution */ - + SYSCALL_PSERIES_1 + SYSCALL_PSERIES_2_RFID + SYSCALL_PSERIES_3 KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00) -/* Fast LE/BE switch system call */ -1: mfspr r12,SPRN_SRR1 - xori r12,r12,MSR_LE - mtspr SPRN_SRR1,r12 - rfid /* return to userspace */ - b . - STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step) KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00) @@ -276,7 +320,7 @@ vsx_unavailable_pSeries_1: KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300) . = 0x1500 - .global denorm_Hypervisor + .global denorm_exception_hv denorm_exception_hv: HMT_MEDIUM mtspr SPRN_SPRG_HSCRATCH0,r13 @@ -311,12 +355,14 @@ denorm_exception_hv: #ifdef CONFIG_CBE_RAS STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal) KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802) +#else + . = 0x1800 #endif /* CONFIG_CBE_RAS */ - . = 0x3000 /*** Out of line interrupts support ***/ + .align 7 /* moved from 0x200 */ machine_check_pSeries: .globl machine_check_fwnmi @@ -575,16 +621,12 @@ slb_miss_user_pseries: b . /* prevent spec. execution */ #endif /* __DISABLED__ */ - .align 7 - .globl __end_interrupts -__end_interrupts: - /* * Code from here down to __end_handlers is invoked from the * exception prologs above. Because the prologs assemble the * addresses of these handlers using the LOAD_HANDLER macro, - * which uses an addi instruction, these handlers must be in - * the first 32k of the kernel image. + * which uses an ori instruction, these handlers must be in + * the first 64k of the kernel image. */ /*** Common interrupt handlers ***/ @@ -613,8 +655,8 @@ machine_check_common: 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(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) @@ -629,7 +671,158 @@ machine_check_common: STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception) #endif /* CONFIG_CBE_RAS */ + /* + * Relocation-on interrupts: A subset of the interrupts can be delivered + * with IR=1/DR=1, if AIL==2 and MSR.HV won't be changed by delivering + * it. Addresses are the same as the original interrupt addresses, but + * offset by 0xc000000000004000. + * It's impossible to receive interrupts below 0x300 via this mechanism. + * KVM: None of these traps are from the guest ; anything that escalated + * to HV=1 from HV=0 is delivered via real mode handlers. + */ + + /* + * This uses the standard macro, since the original 0x300 vector + * only has extra guff for STAB-based processors -- which never + * come here. + */ + STD_RELON_EXCEPTION_PSERIES(0x4300, 0x300, data_access) + . = 0x4380 + .globl data_access_slb_relon_pSeries +data_access_slb_relon_pSeries: + HMT_MEDIUM + SET_SCRATCH0(r13) + 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 +#else + /* + * 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) + mtctr r10 + bctr +#endif + + STD_RELON_EXCEPTION_PSERIES(0x4400, 0x400, instruction_access) + . = 0x4480 + .globl instruction_access_slb_relon_pSeries +instruction_access_slb_relon_pSeries: + HMT_MEDIUM + SET_SCRATCH0(r13) + 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 +#else + mfctr r11 + ld r10,PACAKBASE(r13) + LOAD_HANDLER(r10, .slb_miss_realmode) + mtctr r10 + bctr +#endif + + . = 0x4500 + .globl hardware_interrupt_relon_pSeries; + .globl hardware_interrupt_relon_hv; +hardware_interrupt_relon_pSeries: +hardware_interrupt_relon_hv: + BEGIN_FTR_SECTION + _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) + 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) + STD_RELON_EXCEPTION_PSERIES(0x4b00, 0xb00, trap_0b) + + . = 0x4c00 + .globl system_call_relon_pSeries +system_call_relon_pSeries: + HMT_MEDIUM + SYSCALL_PSERIES_1 + SYSCALL_PSERIES_2_DIRECT + SYSCALL_PSERIES_3 + + STD_RELON_EXCEPTION_PSERIES(0x4d00, 0xd00, single_step) + + . = 0x4e00 + b h_data_storage_relon_hv + + . = 0x4e20 + b h_instr_storage_relon_hv + + . = 0x4e40 + b emulation_assist_relon_hv + + . = 0x4e50 + b hmi_exception_relon_hv + + . = 0x4e60 + b hmi_exception_relon_hv + + /* For when we support the doorbell interrupt: + STD_RELON_EXCEPTION_HYPERVISOR(0x4e80, 0xe80, doorbell_hyper) + */ + +performance_monitor_relon_pSeries_1: + . = 0x4f00 + b performance_monitor_relon_pSeries + +altivec_unavailable_relon_pSeries_1: + . = 0x4f20 + b altivec_unavailable_relon_pSeries + +vsx_unavailable_relon_pSeries_1: + . = 0x4f40 + b vsx_unavailable_relon_pSeries + +#ifdef CONFIG_CBE_RAS + STD_RELON_EXCEPTION_HV(0x5200, 0x1202, cbe_system_error) +#endif /* CONFIG_CBE_RAS */ + 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 + .globl __end_interrupts +__end_interrupts: + + .align 7 +system_call_entry_direct: +#if defined(CONFIG_RELOCATABLE) + /* The first level prologue may have used LR to get here, saving + * orig in r10. To save hacking/ifdeffing common code, restore here. + */ + mtlr r10 +#endif system_call_entry: b system_call_common @@ -714,21 +907,21 @@ 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 + .globl h_data_storage_common h_data_storage_common: - mfspr r10,SPRN_HDAR - std r10,PACA_EXGEN+EX_DAR(r13) - mfspr r10,SPRN_HDSISR - stw r10,PACA_EXGEN+EX_DSISR(r13) - EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) - bl .save_nvgprs + mfspr r10,SPRN_HDAR + std r10,PACA_EXGEN+EX_DAR(r13) + mfspr r10,SPRN_HDSISR + stw r10,PACA_EXGEN+EX_DSISR(r13) + EXCEPTION_PROLOG_COMMON(0xe00, PACA_EXGEN) + bl .save_nvgprs DISABLE_INTS - addi r3,r1,STACK_FRAME_OVERHEAD - bl .unknown_exception - b .ret_from_except + addi r3,r1,STACK_FRAME_OVERHEAD + bl .unknown_exception + b .ret_from_except .align 7 .globl instruction_access_common @@ -741,7 +934,7 @@ instruction_access_common: li r5,0x400 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 @@ -1152,6 +1345,21 @@ _GLOBAL(do_stab_bolted) 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. @@ -1164,7 +1372,7 @@ fwnmi_data_area: /* pseries and powernv need to keep the whole page from * 0x7000 to 0x8000 free for use by the firmware */ - . = 0x8000 + . = 0x8000 #endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ /* Space for CPU0's segment table */ |