diff options
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 2024 |
1 files changed, 986 insertions, 1038 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index bffec73dbffc..f129408c6022 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -16,72 +16,71 @@ #include <asm/exception-64s.h> #include <asm/ptrace.h> #include <asm/cpuidle.h> +#include <asm/head-64.h> /* + * There are a few constraints to be concerned with. + * - Real mode exceptions code/data must be located at their physical location. + * - Virtual mode exceptions must be mapped at their 0xc000... location. + * - Fixed location code must not call directly beyond the __end_interrupts + * area when built with CONFIG_RELOCATABLE. LOAD_HANDLER / bctr sequence + * must be used. + * - LOAD_HANDLER targets must be within first 64K of physical 0 / + * virtual 0xc00... + * - Conditional branch targets must be within +/-32K of caller. + * + * "Virtual exceptions" run with relocation on (MSR_IR=1, MSR_DR=1), and + * therefore don't have to run in physically located code or rfid to + * virtual mode kernel code. However on relocatable kernels they do have + * to branch to KERNELBASE offset because the rest of the kernel (outside + * the exception vectors) may be located elsewhere. + * + * Virtual exceptions correspond with physical, except their entry points + * are offset by 0xc000000000000000 and also tend to get an added 0x4000 + * offset applied. Virtual exceptions are enabled with the Alternate + * Interrupt Location (AIL) bit set in the LPCR. However this does not + * guarantee they will be delivered virtually. Some conditions (see the ISA) + * cause exceptions to be delivered in real mode. + * + * It's impossible to receive interrupts below 0x300 via AIL. + * + * KVM: None of the virtual exceptions are from the guest. Anything that + * escalated to HV=1 from HV=0 is delivered via real mode handlers. + * + * * We layout physical memory as follows: * 0x0000 - 0x00ff : Secondary processor spin code - * 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 + * 0x0100 - 0x18ff : Real mode pSeries interrupt vectors + * 0x1900 - 0x3fff : Real mode trampolines + * 0x4000 - 0x58ff : Relon (IR=1,DR=1) mode pSeries interrupt vectors + * 0x5900 - 0x6fff : Relon mode trampolines * 0x7000 - 0x7fff : FWNMI data area - * 0x8000 - 0x8fff : Initial (CPU0) segment table - * 0x9000 - : Early init and support code + * 0x8000 - .... : Common interrupt handlers, remaining early + * setup code, rest of kernel. + * + * We could reclaim 0x4000-0x42ff for real mode trampolines if the space + * is necessary. Until then it's more consistent to explicitly put VIRT_NONE + * vectors there. */ - /* 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 . ; /* prevent speculative execution */ - -#if defined(CONFIG_RELOCATABLE) - /* - * We can't branch directly so we do it via the CTR which - * is volatile across system calls. - */ -#define SYSCALL_PSERIES_2_DIRECT \ - mflr r10 ; \ - ld r12,PACAKBASE(r13) ; \ - LOAD_HANDLER(r12, system_call_entry) ; \ - 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 */ \ - bctr ; +OPEN_FIXED_SECTION(real_vectors, 0x0100, 0x1900) +OPEN_FIXED_SECTION(real_trampolines, 0x1900, 0x4000) +OPEN_FIXED_SECTION(virt_vectors, 0x4000, 0x5900) +OPEN_FIXED_SECTION(virt_trampolines, 0x5900, 0x7000) +#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) +/* + * Data area reserved for FWNMI option. + * This address (0x7000) is fixed by the RPA. + * pseries and powernv need to keep the whole page from + * 0x7000 to 0x8000 free for use by the firmware + */ +ZERO_FIXED_SECTION(fwnmi_page, 0x7000, 0x8000) +OPEN_TEXT_SECTION(0x8000) #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_common ; +OPEN_TEXT_SECTION(0x7000) #endif +USE_FIXED_SECTION(real_vectors) + /* * This is the start of the interrupt handlers for pSeries * This code runs with relocation off. @@ -90,12 +89,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ * Therefore any relative branches in this section must only * branch to labels in this section. */ - . = 0x100 .globl __start_interrupts __start_interrupts: - .globl system_reset_pSeries; -system_reset_pSeries: +/* No virt vectors corresponding with 0x0..0x100 */ +EXC_VIRT_NONE(0x4000, 0x4100) + +EXC_REAL_BEGIN(system_reset, 0x100, 0x200) SET_SCRATCH0(r13) #ifdef CONFIG_PPC_P7_NAP BEGIN_FTR_SECTION @@ -136,9 +136,22 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) #endif /* CONFIG_PPC_P7_NAP */ EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, NOTEST, 0x100) +EXC_REAL_END(system_reset, 0x100, 0x200) +EXC_VIRT_NONE(0x4100, 0x4200) +EXC_COMMON(system_reset_common, 0x100, system_reset_exception) + +#ifdef CONFIG_PPC_PSERIES +/* + * Vectors for the FWNMI option. Share common code. + */ +TRAMP_REAL_BEGIN(system_reset_fwnmi) + SET_SCRATCH0(r13) /* save r13 */ + EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, + NOTEST, 0x100) +#endif /* CONFIG_PPC_PSERIES */ + - . = 0x200 -machine_check_pSeries_1: +EXC_REAL_BEGIN(machine_check, 0x200, 0x300) /* 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 @@ -158,253 +171,9 @@ BEGIN_FTR_SECTION FTR_SECTION_ELSE b machine_check_pSeries_0 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) - - . = 0x300 - .globl data_access_pSeries -data_access_pSeries: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD, - KVMTEST, 0x300) - - . = 0x380 - .globl data_access_slb_pSeries -data_access_slb_pSeries: - 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 - 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_EXCEPTION_PSERIES(0x400, instruction_access) - - . = 0x480 - .globl instruction_access_slb_pSeries -instruction_access_slb_pSeries: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXSLB) - EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 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 - - /* We open code these as we can't have a ". = x" (even with - * x = "." within a feature section - */ - . = 0x500; - .globl hardware_interrupt_pSeries; - .globl hardware_interrupt_hv; -hardware_interrupt_pSeries: -hardware_interrupt_hv: - BEGIN_FTR_SECTION - _MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, - EXC_HV, SOFTEN_TEST_HV) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502) - FTR_SECTION_ELSE - _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, - EXC_STD, SOFTEN_TEST_PR) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500) - ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) - - STD_EXCEPTION_PSERIES(0x600, alignment) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x600) - - STD_EXCEPTION_PSERIES(0x700, program_check) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x700) - - STD_EXCEPTION_PSERIES(0x800, fp_unavailable) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x800) - - . = 0x900 - .globl decrementer_pSeries -decrementer_pSeries: - _MASKABLE_EXCEPTION_PSERIES(0x900, decrementer, EXC_STD, SOFTEN_TEST_PR) - - STD_EXCEPTION_HV(0x980, 0x982, hdecrementer) - - MASKABLE_EXCEPTION_PSERIES(0xa00, 0xa00, doorbell_super) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00) - - STD_EXCEPTION_PSERIES(0xb00, trap_0b) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xb00) - - . = 0xc00 - .globl system_call_pSeries -system_call_pSeries: - /* - * If CONFIG_KVM_BOOK3S_64_HANDLER is set, save the PPR (on systems - * that support it) before changing to HMT_MEDIUM. That allows the KVM - * code to save that value into the guest state (it is the guest's PPR - * value). Otherwise just change to HMT_MEDIUM as userspace has - * already saved the PPR. - */ -#ifdef CONFIG_KVM_BOOK3S_64_HANDLER - SET_SCRATCH0(r13) - GET_PACA(r13) - std r9,PACA_EXGEN+EX_R9(r13) - OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); - HMT_MEDIUM; - std r10,PACA_EXGEN+EX_R10(r13) - OPT_SAVE_REG_TO_PACA(PACA_EXGEN+EX_PPR, r9, CPU_FTR_HAS_PPR); - mfcr r9 - KVMTEST(0xc00) - GET_SCRATCH0(r13) -#else - HMT_MEDIUM; -#endif - SYSCALL_PSERIES_1 - SYSCALL_PSERIES_2_RFID - SYSCALL_PSERIES_3 - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00) - - STD_EXCEPTION_PSERIES(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 - */ - . = 0xe00 -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 - - . = 0xe60 -hv_exception_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b hmi_exception_early - - . = 0xe80 -hv_doorbell_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b h_doorbell_hv - - . = 0xea0 -hv_virt_irq_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b h_virt_irq_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 - */ - . = 0xf00 -performance_monitor_pseries_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b performance_monitor_pSeries - - . = 0xf20 -altivec_unavailable_pseries_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b altivec_unavailable_pSeries - - . = 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) -#endif /* CONFIG_CBE_RAS */ - - STD_EXCEPTION_PSERIES(0x1300, instruction_breakpoint) - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1300) - - . = 0x1500 - .global denorm_exception_hv -denorm_exception_hv: - mtspr SPRN_SPRG_HSCRATCH0,r13 - EXCEPTION_PROLOG_0(PACA_EXGEN) - EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) - -#ifdef CONFIG_PPC_DENORMALISATION - mfspr r10,SPRN_HSRR1 - mfspr r11,SPRN_HSRR0 /* save HSRR0 */ - andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */ - addi r11,r11,-4 /* HSRR0 is next instruction */ - bne+ denorm_assist -#endif - - KVMTEST(0x1500) - EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1500) - -#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, 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) -#else - . = 0x1800 -#endif /* CONFIG_CBE_RAS */ - - -/*** Out of line interrupts support ***/ - - .align 7 - /* moved from 0x200 */ -machine_check_powernv_early: +EXC_REAL_END(machine_check, 0x200, 0x300) +EXC_VIRT_NONE(0x4200, 0x4300) +TRAMP_REAL_BEGIN(machine_check_powernv_early) BEGIN_FTR_SECTION EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200) /* @@ -457,7 +226,6 @@ BEGIN_FTR_SECTION 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 @@ -470,7 +238,6 @@ BEGIN_FTR_SECTION */ 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 */ @@ -478,20 +245,19 @@ BEGIN_FTR_SECTION b . /* prevent speculative execution */ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE) -machine_check_pSeries: +TRAMP_REAL_BEGIN(machine_check_pSeries) .globl machine_check_fwnmi machine_check_fwnmi: SET_SCRATCH0(r13) /* save r13 */ EXCEPTION_PROLOG_0(PACA_EXMC) machine_check_pSeries_0: - EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST, 0x200) + EXCEPTION_PROLOG_1(PACA_EXMC, KVMTEST_PR, 0x200) /* * The following is essentially EXCEPTION_PROLOG_PSERIES_1 with the * difference that MSR_RI is not enabled, because PACA_EXMC is being * used, so nested machine check corrupts it. machine_check_common * enables MSR_RI. */ - ld r12,PACAKBASE(r13) ld r10,PACAKMSR(r13) xori r10,r10,MSR_RI mfspr r11,SPRN_SRR0 @@ -502,488 +268,13 @@ machine_check_pSeries_0: rfid b . /* prevent speculative execution */ - KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200) - 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) - -#ifdef CONFIG_PPC_DENORMALISATION -denorm_assist: -BEGIN_FTR_SECTION -/* - * To denormalise we need to move a copy of the register to itself. - * For POWER6 do that here for all FP regs. - */ - mfmsr r10 - ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1) - xori r10,r10,(MSR_FE0|MSR_FE1) - mtmsrd r10 - sync - -#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. - * For POWER7 do that here for the first 32 VSX registers only. - */ - mfmsr r10 - oris r10,r10,MSR_VSX@h - mtmsrd r10 - sync - -#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) - ld r13,PACA_EXGEN+EX_R13(r13) - HRFID - b . -#endif - - .align 7 - /* moved from 0xe00 */ - STD_EXCEPTION_HV_OOL(0xe02, h_data_storage) - KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02) - STD_EXCEPTION_HV_OOL(0xe22, h_instr_storage) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22) - STD_EXCEPTION_HV_OOL(0xe42, emulation_assist) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42) - MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62) - - MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82) - - MASKABLE_EXCEPTION_HV_OOL(0xea2, h_virt_irq) - KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xea2) - - /* moved from 0xf00 */ - STD_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00) - STD_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20) - STD_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable) - KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf40) - STD_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable) - KVM_HANDLER(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. - * - If it was a doorbell we return immediately since doorbells are edge - * triggered and won't automatically refire. - * - If it was a HMI we return immediately since we handled it in realmode - * and it won't 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: \ - std r11,PACA_EXGEN+EX_R11(r13); \ - lbz r11,PACAIRQHAPPENED(r13); \ - or r11,r11,r10; \ - stb r11,PACAIRQHAPPENED(r13); \ - cmpwi r10,PACA_IRQ_DEC; \ - bne 1f; \ - lis r10,0x7fff; \ - ori r10,r10,0xffff; \ - mtspr SPRN_DEC,r10; \ - b 2f; \ -1: cmpwi r10,PACA_IRQ_DBELL; \ - beq 2f; \ - cmpwi r10,PACA_IRQ_HMI; \ - beq 2f; \ - mfspr r10,SPRN_##_H##SRR1; \ - rldicl r10,r10,48,1; /* clear MSR_EE */ \ - rotldi r10,r10,16; \ - mtspr SPRN_##_H##SRR1,r10; \ -2: mtcrf 0x80,r9; \ - ld r9,PACA_EXGEN+EX_R9(r13); \ - ld r10,PACA_EXGEN+EX_R10(r13); \ - ld r11,PACA_EXGEN+EX_R11(r13); \ - GET_SCRATCH0(r13); \ - ##_H##rfid; \ - b . - - MASKED_INTERRUPT() - MASKED_INTERRUPT(H) - -/* - * Called from arch_local_irq_enable when an interrupt needs - * 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 - * in the generated frame has EE set to 1 or the exception - * handler will not properly re-enable them. - */ -_GLOBAL(__replay_interrupt) - /* We are going to jump to the exception common code which - * will retrieve various register values from the PACA which - * we don't give a damn about, so we don't bother storing them. - */ - mfmsr r12 - mflr r11 - mfcr r9 - ori r12,r12,MSR_EE - cmpwi r3,0x900 - beq decrementer_common - cmpwi r3,0x500 - beq hardware_interrupt_common -BEGIN_FTR_SECTION - cmpwi r3,0xe80 - beq h_doorbell_common - cmpwi r3,0xea0 - beq h_virt_irq_common - cmpwi r3,0xe60 - beq hmi_exception_common -FTR_SECTION_ELSE - cmpwi r3,0xa00 - beq doorbell_super_common -ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) - blr - -#ifdef CONFIG_PPC_PSERIES -/* - * Vectors for the FWNMI option. Share common code. - */ - .globl system_reset_fwnmi - .align 7 -system_reset_fwnmi: - SET_SCRATCH0(r13) /* save r13 */ - EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD, - NOTEST, 0x100) - -#endif /* CONFIG_PPC_PSERIES */ - -#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 - -/* - * Ensure that any handlers that get invoked from the exception prologs - * above are below the first 64KB (0x10000) of the kernel image because - * the prologs assemble the addresses of these handlers using the - * LOAD_HANDLER macro, which uses an ori instruction. - */ - -/*** Common interrupt handlers ***/ - - 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) -#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_ASYNC(0xe60, hmi_exception, handle_hmi_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(0xea0, h_virt_irq, do_IRQ) - 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) -#else - STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception) -#endif - - /* - * 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: - 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 -#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: - 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 -#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_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 - .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 . /* Can't happen, see v2.07 Book III-S section 6.5 */ - - . = 0x4e20 - 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 - - . = 0x4e60 - b . /* Can't happen, see v2.07 Book III-S section 6.5 */ - - . = 0x4e80 -h_doorbell_relon_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b h_doorbell_relon_hv - - . = 0x4ea0 -h_virt_irq_relon_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b h_virt_irq_relon_hv - - . = 0x4f00 -performance_monitor_relon_pseries_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b performance_monitor_relon_pSeries - - . = 0x4f20 -altivec_unavailable_relon_pseries_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b altivec_unavailable_relon_pSeries - - . = 0x4f40 -vsx_unavailable_relon_pseries_trampoline: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b vsx_unavailable_relon_pSeries - - . = 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 - STD_RELON_EXCEPTION_PSERIES(0x5700, 0x1700, altivec_assist) - - .align 7 -system_call_entry: - b system_call_common - -ppc64_runlatch_on_trampoline: - b __ppc64_runlatch_on - -/* - * Here r13 points to the paca, r9 contains the saved CR, - * SRR0 and SRR1 are saved in r11 and r12, - * r9 - r13 are saved in paca->exgen. - */ - .align 7 - .globl data_access_common -data_access_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(0x300, PACA_EXGEN) - RECONCILE_IRQ_STATE(r10, r11) - ld r12,_MSR(r1) - ld r3,PACA_EXGEN+EX_DAR(r13) - lwz r4,PACA_EXGEN+EX_DSISR(r13) - li r5,0x300 - std r3,_DAR(r1) - std r4,_DSISR(r1) -BEGIN_MMU_FTR_SECTION - b do_hash_page /* Try to handle as hpte fault */ -MMU_FTR_SECTION_ELSE - b handle_page_fault -ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) - - .align 7 - .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 - RECONCILE_IRQ_STATE(r10, r11) - addi r3,r1,STACK_FRAME_OVERHEAD - bl unknown_exception - b ret_from_except - - .align 7 - .globl instruction_access_common -instruction_access_common: - EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) - RECONCILE_IRQ_STATE(r10, r11) - ld r12,_MSR(r1) - ld r3,_NIP(r1) - andis. r4,r12,0x5820 - li r5,0x400 - std r3,_DAR(r1) - std r4,_DSISR(r1) -BEGIN_MMU_FTR_SECTION - b do_hash_page /* Try to handle as hpte fault */ -MMU_FTR_SECTION_ELSE - b handle_page_fault -ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) - - STD_EXCEPTION_COMMON(0xe20, h_instr_storage, unknown_exception) +TRAMP_KVM_SKIP(PACA_EXMC, 0x200) +EXC_COMMON_BEGIN(machine_check_common) /* * 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_EXMC+EX_DAR(r13) mfspr r10,SPRN_DSISR @@ -1003,230 +294,6 @@ machine_check_common: 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - 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 - RECONCILE_IRQ_STATE(r10, r11) - addi r3,r1,STACK_FRAME_OVERHEAD - bl vsx_unavailable_exception - b ret_from_except - - /* 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) - MASKABLE_RELON_EXCEPTION_HV_OOL(0xea0, h_virt_irq) - - 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) - - /* - * The __end_interrupts marker must be past the out-of-line (OOL) - * handlers, so that they are copied to real address 0x100 when running - * a relocatable kernel. This ensures they can be reached from the short - * trampoline handlers (like 0x4f00, 0x4f20, etc.) which branch - * directly, without using LOAD_HANDLER(). - */ - .align 7 - .globl __end_interrupts -__end_interrupts: - -#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) */ - - STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception) - STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception) - -#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) -#endif /* CONFIG_CBE_RAS */ - - .globl hmi_exception_early -hmi_exception_early: - EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, 0xe62) - mr r10,r1 /* Save r1 */ - ld r1,PACAEMERGSP(r13) /* Use emergency stack */ - subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ - std r9,_CCR(r1) /* save CR in stackframe */ - mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ - std r11,_NIP(r1) /* save HSRR0 in stackframe */ - mfspr r12,SPRN_HSRR1 /* Save SRR1 */ - std r12,_MSR(r1) /* save SRR1 in stackframe */ - std r10,0(r1) /* make stack chain pointer */ - std r0,GPR0(r1) /* save r0 in stackframe */ - std r10,GPR1(r1) /* save r1 in stackframe */ - EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) - EXCEPTION_PROLOG_COMMON_3(0xe60) - addi r3,r1,STACK_FRAME_OVERHEAD - bl hmi_exception_realmode - /* Windup the stack. */ - /* Move original HSRR0 and HSRR1 into the respective regs */ - ld r9,_MSR(r1) - mtspr SPRN_HSRR1,r9 - ld r3,_NIP(r1) - mtspr SPRN_HSRR0,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 - REST_GPR(11, r1) - REST_2GPRS(12, r1) - /* restore original r1. */ - ld r1,GPR1(r1) - - /* - * Go to virtual mode and pull the HMI event information from - * firmware. - */ - .globl hmi_exception_after_realmode -hmi_exception_after_realmode: - SET_SCRATCH0(r13) - EXCEPTION_PROLOG_0(PACA_EXGEN) - b hmi_exception_hv - - #define MACHINE_CHECK_HANDLER_WINDUP \ /* Clear MSR_RI before setting SRR0 and SRR1. */\ li r0,MSR_RI; \ @@ -1262,9 +329,7 @@ hmi_exception_after_realmode: * 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: +EXC_COMMON_BEGIN(machine_check_handle_early) std r0,GPR0(r1) /* Save r0 */ EXCEPTION_PROLOG_COMMON_3(0x200) bl save_nvgprs @@ -1353,7 +418,6 @@ machine_check_handle_early: 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) @@ -1391,7 +455,7 @@ machine_check_handle_early: MACHINE_CHECK_HANDLER_WINDUP b machine_check_pSeries -unrecover_mce: +EXC_COMMON_BEGIN(unrecover_mce) /* Invoke machine_check_exception to print MCE event and panic. */ addi r3,r1,STACK_FRAME_OVERHEAD bl machine_check_exception @@ -1402,15 +466,155 @@ unrecover_mce: 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 - * r3 has the faulting address - * r9 - r13 are saved in paca->exslb. - * r3 is saved in paca->slb_r3 - * We assume we aren't going to take any exceptions during this procedure. - */ -slb_miss_realmode: + + +EXC_REAL(data_access, 0x300, 0x380) +EXC_VIRT(data_access, 0x4300, 0x4380, 0x300) +TRAMP_KVM_SKIP(PACA_EXGEN, 0x300) + +EXC_COMMON_BEGIN(data_access_common) + /* + * Here r13 points to the paca, r9 contains the saved CR, + * SRR0 and SRR1 are saved in r11 and r12, + * r9 - r13 are saved in paca->exgen. + */ + 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(0x300, PACA_EXGEN) + RECONCILE_IRQ_STATE(r10, r11) + ld r12,_MSR(r1) + ld r3,PACA_EXGEN+EX_DAR(r13) + lwz r4,PACA_EXGEN+EX_DSISR(r13) + li r5,0x300 + std r3,_DAR(r1) + std r4,_DSISR(r1) +BEGIN_MMU_FTR_SECTION + b do_hash_page /* Try to handle as hpte fault */ +MMU_FTR_SECTION_ELSE + b handle_page_fault +ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) + + +EXC_REAL_BEGIN(data_access_slb, 0x380, 0x400) + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXSLB) + EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x380) + std r3,PACA_EXSLB+EX_R3(r13) + mfspr r3,SPRN_DAR + mfspr r12,SPRN_SRR1 + crset 4*cr6+eq +#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 + LOAD_HANDLER(r10, slb_miss_realmode) + mtctr r10 + bctr +#endif +EXC_REAL_END(data_access_slb, 0x380, 0x400) + +EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x4400) + 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 + crset 4*cr6+eq +#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 + LOAD_HANDLER(r10, slb_miss_realmode) + mtctr r10 + bctr +#endif +EXC_VIRT_END(data_access_slb, 0x4380, 0x4400) +TRAMP_KVM_SKIP(PACA_EXSLB, 0x380) + + +EXC_REAL(instruction_access, 0x400, 0x480) +EXC_VIRT(instruction_access, 0x4400, 0x4480, 0x400) +TRAMP_KVM(PACA_EXGEN, 0x400) + +EXC_COMMON_BEGIN(instruction_access_common) + EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) + RECONCILE_IRQ_STATE(r10, r11) + ld r12,_MSR(r1) + ld r3,_NIP(r1) + andis. r4,r12,0x5820 + li r5,0x400 + std r3,_DAR(r1) + std r4,_DSISR(r1) +BEGIN_MMU_FTR_SECTION + b do_hash_page /* Try to handle as hpte fault */ +MMU_FTR_SECTION_ELSE + b handle_page_fault +ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) + + +EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x500) + 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 */ + 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_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 @@ -1418,29 +622,31 @@ slb_miss_realmode: 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 - /* All done -- return from exception. */ 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 */ -BEGIN_MMU_FTR_SECTION beq- 2f -FTR_SECTION_ELSE - b 2f -ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) + + /* 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 @@ -1454,7 +660,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) b . /* prevent speculative execution */ 2: mfspr r11,SPRN_SRR0 - ld r10,PACAKBASE(r13) LOAD_HANDLER(r10,unrecov_slb) mtspr SPRN_SRR0,r10 ld r10,PACAKMSR(r13) @@ -1462,7 +667,15 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) rfid b . -unrecov_slb: +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 @@ -1470,9 +683,701 @@ unrecov_slb: 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: + BEGIN_FTR_SECTION + _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt_common, + EXC_HV, SOFTEN_TEST_HV) +do_kvm_H0x500: + KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502) + FTR_SECTION_ELSE + _MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt_common, + EXC_STD, SOFTEN_TEST_PR) +do_kvm_0x500: + KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500) + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) +EXC_REAL_END(hardware_interrupt, 0x500, 0x600) + +EXC_VIRT_BEGIN(hardware_interrupt, 0x4500, 0x4600) + .globl hardware_interrupt_relon_hv; +hardware_interrupt_relon_hv: + BEGIN_FTR_SECTION + _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt_common, EXC_HV, SOFTEN_TEST_HV) + FTR_SECTION_ELSE + _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt_common, EXC_STD, SOFTEN_TEST_PR) + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) +EXC_VIRT_END(hardware_interrupt, 0x4500, 0x4600) + +EXC_COMMON_ASYNC(hardware_interrupt_common, 0x500, do_IRQ) + + +EXC_REAL(alignment, 0x600, 0x700) +EXC_VIRT(alignment, 0x4600, 0x4700, 0x600) +TRAMP_KVM(PACA_EXGEN, 0x600) +EXC_COMMON_BEGIN(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 + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl alignment_exception + b ret_from_except + + +EXC_REAL(program_check, 0x700, 0x800) +EXC_VIRT(program_check, 0x4700, 0x4800, 0x700) +TRAMP_KVM(PACA_EXGEN, 0x700) +EXC_COMMON_BEGIN(program_check_common) + EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) + bl save_nvgprs + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl program_check_exception + b ret_from_except + + +EXC_REAL(fp_unavailable, 0x800, 0x900) +EXC_VIRT(fp_unavailable, 0x4800, 0x4900, 0x800) +TRAMP_KVM(PACA_EXGEN, 0x800) +EXC_COMMON_BEGIN(fp_unavailable_common) + EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) + bne 1f /* if from user, just load it up */ + bl save_nvgprs + RECONCILE_IRQ_STATE(r10, r11) + 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 + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl fp_unavailable_tm + b ret_from_except +#endif + + +EXC_REAL_MASKABLE(decrementer, 0x900, 0x980) +EXC_VIRT_MASKABLE(decrementer, 0x4900, 0x4980, 0x900) +TRAMP_KVM(PACA_EXGEN, 0x900) +EXC_COMMON_ASYNC(decrementer_common, 0x900, timer_interrupt) + + +EXC_REAL_HV(hdecrementer, 0x980, 0xa00) +EXC_VIRT_HV(hdecrementer, 0x4980, 0x4a00, 0x980) +TRAMP_KVM_HV(PACA_EXGEN, 0x980) +EXC_COMMON(hdecrementer_common, 0x980, hdec_interrupt) + + +EXC_REAL_MASKABLE(doorbell_super, 0xa00, 0xb00) +EXC_VIRT_MASKABLE(doorbell_super, 0x4a00, 0x4b00, 0xa00) +TRAMP_KVM(PACA_EXGEN, 0xa00) +#ifdef CONFIG_PPC_DOORBELL +EXC_COMMON_ASYNC(doorbell_super_common, 0xa00, doorbell_exception) +#else +EXC_COMMON_ASYNC(doorbell_super_common, 0xa00, unknown_exception) +#endif + + +EXC_REAL(trap_0b, 0xb00, 0xc00) +EXC_VIRT(trap_0b, 0x4b00, 0x4c00, 0xb00) +TRAMP_KVM(PACA_EXGEN, 0xb00) +EXC_COMMON(trap_0b_common, 0xb00, unknown_exception) + + +#define LOAD_SYSCALL_HANDLER(reg) \ + ld reg,PACAKBASE(r13); \ + ori reg,reg,(ABS_ADDR(system_call_common))@l; + +/* 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 ; \ + LOAD_SYSCALL_HANDLER(r10) ; \ + 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 . ; /* prevent speculative execution */ + +#if defined(CONFIG_RELOCATABLE) + /* + * We can't branch directly so we do it via the CTR which + * is volatile across system calls. + */ +#define SYSCALL_PSERIES_2_DIRECT \ + LOAD_SYSCALL_HANDLER(r12) ; \ + mtctr r12 ; \ + mfspr r12,SPRN_SRR1 ; \ + li r10,MSR_RI ; \ + mtmsrd r10,1 ; \ + bctr ; +#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_common ; +#endif + +EXC_REAL_BEGIN(system_call, 0xc00, 0xd00) + /* + * If CONFIG_KVM_BOOK3S_64_HANDLER is set, save the PPR (on systems + * that support it) before changing to HMT_MEDIUM. That allows the KVM + * code to save that value into the guest state (it is the guest's PPR + * value). Otherwise just change to HMT_MEDIUM as userspace has + * already saved the PPR. + */ +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER + SET_SCRATCH0(r13) + GET_PACA(r13) + std r9,PACA_EXGEN+EX_R9(r13) + OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); + HMT_MEDIUM; + std r10,PACA_EXGEN+EX_R10(r13) + OPT_SAVE_REG_TO_PACA(PACA_EXGEN+EX_PPR, r9, CPU_FTR_HAS_PPR); + mfcr r9 + KVMTEST_PR(0xc00) + GET_SCRATCH0(r13) +#else + HMT_MEDIUM; +#endif + SYSCALL_PSERIES_1 + SYSCALL_PSERIES_2_RFID + SYSCALL_PSERIES_3 +EXC_REAL_END(system_call, 0xc00, 0xd00) + +EXC_VIRT_BEGIN(system_call, 0x4c00, 0x4d00) + HMT_MEDIUM + SYSCALL_PSERIES_1 + SYSCALL_PSERIES_2_DIRECT + SYSCALL_PSERIES_3 +EXC_VIRT_END(system_call, 0x4c00, 0x4d00) + +TRAMP_KVM(PACA_EXGEN, 0xc00) + + +EXC_REAL(single_step, 0xd00, 0xe00) +EXC_VIRT(single_step, 0x4d00, 0x4e00, 0xd00) +TRAMP_KVM(PACA_EXGEN, 0xd00) +EXC_COMMON(single_step_common, 0xd00, single_step_exception) + +EXC_REAL_OOL_HV(h_data_storage, 0xe00, 0xe20) +EXC_VIRT_NONE(0x4e00, 0x4e20) +TRAMP_KVM_HV_SKIP(PACA_EXGEN, 0xe00) +EXC_COMMON_BEGIN(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 + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl unknown_exception + b ret_from_except + + +EXC_REAL_OOL_HV(h_instr_storage, 0xe20, 0xe40) +EXC_VIRT_NONE(0x4e20, 0x4e40) +TRAMP_KVM_HV(PACA_EXGEN, 0xe20) +EXC_COMMON(h_instr_storage_common, 0xe20, unknown_exception) + + +EXC_REAL_OOL_HV(emulation_assist, 0xe40, 0xe60) +EXC_VIRT_OOL_HV(emulation_assist, 0x4e40, 0x4e60, 0xe40) +TRAMP_KVM_HV(PACA_EXGEN, 0xe40) +EXC_COMMON(emulation_assist_common, 0xe40, emulation_assist_interrupt) + + +/* + * hmi_exception trampoline is a special case. It jumps to hmi_exception_early + * first, and then eventaully from there to the trampoline to get into virtual + * mode. + */ +__EXC_REAL_OOL_HV_DIRECT(hmi_exception, 0xe60, 0xe80, hmi_exception_early) +__TRAMP_REAL_REAL_OOL_MASKABLE_HV(hmi_exception, 0xe60) +EXC_VIRT_NONE(0x4e60, 0x4e80) +TRAMP_KVM_HV(PACA_EXGEN, 0xe60) +TRAMP_REAL_BEGIN(hmi_exception_early) + EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, 0xe60) + mr r10,r1 /* Save r1 */ + ld r1,PACAEMERGSP(r13) /* Use emergency stack */ + subi r1,r1,INT_FRAME_SIZE /* alloc stack frame */ + std r9,_CCR(r1) /* save CR in stackframe */ + mfspr r11,SPRN_HSRR0 /* Save HSRR0 */ + std r11,_NIP(r1) /* save HSRR0 in stackframe */ + mfspr r12,SPRN_HSRR1 /* Save SRR1 */ + std r12,_MSR(r1) /* save SRR1 in stackframe */ + std r10,0(r1) /* make stack chain pointer */ + std r0,GPR0(r1) /* save r0 in stackframe */ + std r10,GPR1(r1) /* save r1 in stackframe */ + EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN) + EXCEPTION_PROLOG_COMMON_3(0xe60) + addi r3,r1,STACK_FRAME_OVERHEAD + bl hmi_exception_realmode + /* Windup the stack. */ + /* Move original HSRR0 and HSRR1 into the respective regs */ + ld r9,_MSR(r1) + mtspr SPRN_HSRR1,r9 + ld r3,_NIP(r1) + mtspr SPRN_HSRR0,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 + REST_GPR(11, r1) + REST_2GPRS(12, r1) + /* restore original r1. */ + ld r1,GPR1(r1) + + /* + * Go to virtual mode and pull the HMI event information from + * firmware. + */ + .globl hmi_exception_after_realmode +hmi_exception_after_realmode: + SET_SCRATCH0(r13) + EXCEPTION_PROLOG_0(PACA_EXGEN) + b tramp_real_hmi_exception + +EXC_COMMON_ASYNC(hmi_exception_common, 0xe60, handle_hmi_exception) + + +EXC_REAL_OOL_MASKABLE_HV(h_doorbell, 0xe80, 0xea0) +EXC_VIRT_OOL_MASKABLE_HV(h_doorbell, 0x4e80, 0x4ea0, 0xe80) +TRAMP_KVM_HV(PACA_EXGEN, 0xe80) +#ifdef CONFIG_PPC_DOORBELL +EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, doorbell_exception) +#else +EXC_COMMON_ASYNC(h_doorbell_common, 0xe80, unknown_exception) +#endif + + +EXC_REAL_OOL_MASKABLE_HV(h_virt_irq, 0xea0, 0xec0) +EXC_VIRT_OOL_MASKABLE_HV(h_virt_irq, 0x4ea0, 0x4ec0, 0xea0) +TRAMP_KVM_HV(PACA_EXGEN, 0xea0) +EXC_COMMON_ASYNC(h_virt_irq_common, 0xea0, do_IRQ) + + +EXC_REAL_NONE(0xec0, 0xf00) +EXC_VIRT_NONE(0x4ec0, 0x4f00) + + +EXC_REAL_OOL(performance_monitor, 0xf00, 0xf20) +EXC_VIRT_OOL(performance_monitor, 0x4f00, 0x4f20, 0xf00) +TRAMP_KVM(PACA_EXGEN, 0xf00) +EXC_COMMON_ASYNC(performance_monitor_common, 0xf00, performance_monitor_exception) + + +EXC_REAL_OOL(altivec_unavailable, 0xf20, 0xf40) +EXC_VIRT_OOL(altivec_unavailable, 0x4f20, 0x4f40, 0xf20) +TRAMP_KVM(PACA_EXGEN, 0xf20) +EXC_COMMON_BEGIN(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 + RECONCILE_IRQ_STATE(r10, r11) + 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 + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl altivec_unavailable_exception + b ret_from_except + + +EXC_REAL_OOL(vsx_unavailable, 0xf40, 0xf60) +EXC_VIRT_OOL(vsx_unavailable, 0x4f40, 0x4f60, 0xf40) +TRAMP_KVM(PACA_EXGEN, 0xf40) +EXC_COMMON_BEGIN(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 + RECONCILE_IRQ_STATE(r10, r11) + 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 + RECONCILE_IRQ_STATE(r10, r11) + addi r3,r1,STACK_FRAME_OVERHEAD + bl vsx_unavailable_exception + b ret_from_except + + +EXC_REAL_OOL(facility_unavailable, 0xf60, 0xf80) +EXC_VIRT_OOL(facility_unavailable, 0x4f60, 0x4f80, 0xf60) +TRAMP_KVM(PACA_EXGEN, 0xf60) +EXC_COMMON(facility_unavailable_common, 0xf60, facility_unavailable_exception) + + +EXC_REAL_OOL_HV(h_facility_unavailable, 0xf80, 0xfa0) +EXC_VIRT_OOL_HV(h_facility_unavailable, 0x4f80, 0x4fa0, 0xf80) +TRAMP_KVM_HV(PACA_EXGEN, 0xf80) +EXC_COMMON(h_facility_unavailable_common, 0xf80, facility_unavailable_exception) + + +EXC_REAL_NONE(0xfa0, 0x1200) +EXC_VIRT_NONE(0x4fa0, 0x5200) + +#ifdef CONFIG_CBE_RAS +EXC_REAL_HV(cbe_system_error, 0x1200, 0x1300) +EXC_VIRT_NONE(0x5200, 0x5300) +TRAMP_KVM_HV_SKIP(PACA_EXGEN, 0x1200) +EXC_COMMON(cbe_system_error_common, 0x1200, cbe_system_error_exception) +#else /* CONFIG_CBE_RAS */ +EXC_REAL_NONE(0x1200, 0x1300) +EXC_VIRT_NONE(0x5200, 0x5300) +#endif + + +EXC_REAL(instruction_breakpoint, 0x1300, 0x1400) +EXC_VIRT(instruction_breakpoint, 0x5300, 0x5400, 0x1300) +TRAMP_KVM_SKIP(PACA_EXGEN, 0x1300) +EXC_COMMON(instruction_breakpoint_common, 0x1300, instruction_breakpoint_exception) + +EXC_REAL_NONE(0x1400, 0x1500) +EXC_VIRT_NONE(0x5400, 0x5500) + +EXC_REAL_BEGIN(denorm_exception_hv, 0x1500, 0x1600) + mtspr SPRN_SPRG_HSCRATCH0,r13 + EXCEPTION_PROLOG_0(PACA_EXGEN) + EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0x1500) + +#ifdef CONFIG_PPC_DENORMALISATION + mfspr r10,SPRN_HSRR1 + mfspr r11,SPRN_HSRR0 /* save HSRR0 */ + andis. r10,r10,(HSRR1_DENORM)@h /* denorm? */ + addi r11,r11,-4 /* HSRR0 is next instruction */ + bne+ denorm_assist +#endif + + KVMTEST_PR(0x1500) + EXCEPTION_PROLOG_PSERIES_1(denorm_common, EXC_HV) +EXC_REAL_END(denorm_exception_hv, 0x1500, 0x1600) + +#ifdef CONFIG_PPC_DENORMALISATION +EXC_VIRT_BEGIN(denorm_exception, 0x5500, 0x5600) + b exc_real_0x1500_denorm_exception_hv +EXC_VIRT_END(denorm_exception, 0x5500, 0x5600) +#else +EXC_VIRT_NONE(0x5500, 0x5600) +#endif + +TRAMP_KVM_SKIP(PACA_EXGEN, 0x1500) + +#ifdef CONFIG_PPC_DENORMALISATION +TRAMP_REAL_BEGIN(denorm_assist) +BEGIN_FTR_SECTION +/* + * To denormalise we need to move a copy of the register to itself. + * For POWER6 do that here for all FP regs. + */ + mfmsr r10 + ori r10,r10,(MSR_FP|MSR_FE0|MSR_FE1) + xori r10,r10,(MSR_FE0|MSR_FE1) + mtmsrd r10 + sync + +#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. + * For POWER7 do that here for the first 32 VSX registers only. + */ + mfmsr r10 + oris r10,r10,MSR_VSX@h + mtmsrd r10 + sync + +#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) + ld r13,PACA_EXGEN+EX_R13(r13) + HRFID + b . +#endif + +EXC_COMMON_HV(denorm_common, 0x1500, unknown_exception) + + +#ifdef CONFIG_CBE_RAS +EXC_REAL_HV(cbe_maintenance, 0x1600, 0x1700) +EXC_VIRT_NONE(0x5600, 0x5700) +TRAMP_KVM_HV_SKIP(PACA_EXGEN, 0x1600) +EXC_COMMON(cbe_maintenance_common, 0x1600, cbe_maintenance_exception) +#else /* CONFIG_CBE_RAS */ +EXC_REAL_NONE(0x1600, 0x1700) +EXC_VIRT_NONE(0x5600, 0x5700) +#endif + + +EXC_REAL(altivec_assist, 0x1700, 0x1800) +EXC_VIRT(altivec_assist, 0x5700, 0x5800, 0x1700) +TRAMP_KVM(PACA_EXGEN, 0x1700) +#ifdef CONFIG_ALTIVEC +EXC_COMMON(altivec_assist_common, 0x1700, altivec_assist_exception) +#else +EXC_COMMON(altivec_assist_common, 0x1700, unknown_exception) +#endif + + +#ifdef CONFIG_CBE_RAS +EXC_REAL_HV(cbe_thermal, 0x1800, 0x1900) +EXC_VIRT_NONE(0x5800, 0x5900) +TRAMP_KVM_HV_SKIP(PACA_EXGEN, 0x1800) +EXC_COMMON(cbe_thermal_common, 0x1800, cbe_thermal_exception) +#else /* CONFIG_CBE_RAS */ +EXC_REAL_NONE(0x1800, 0x1900) +EXC_VIRT_NONE(0x5800, 0x5900) +#endif + + +/* + * 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. + * - If it was a HMI we return immediately since we handled it in realmode + * and it won't 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: \ + std r11,PACA_EXGEN+EX_R11(r13); \ + lbz r11,PACAIRQHAPPENED(r13); \ + or r11,r11,r10; \ + stb r11,PACAIRQHAPPENED(r13); \ + cmpwi r10,PACA_IRQ_DEC; \ + bne 1f; \ + lis r10,0x7fff; \ + ori r10,r10,0xffff; \ + mtspr SPRN_DEC,r10; \ + b 2f; \ +1: cmpwi r10,PACA_IRQ_DBELL; \ + beq 2f; \ + cmpwi r10,PACA_IRQ_HMI; \ + beq 2f; \ + mfspr r10,SPRN_##_H##SRR1; \ + rldicl r10,r10,48,1; /* clear MSR_EE */ \ + rotldi r10,r10,16; \ + mtspr SPRN_##_H##SRR1,r10; \ +2: mtcrf 0x80,r9; \ + ld r9,PACA_EXGEN+EX_R9(r13); \ + ld r10,PACA_EXGEN+EX_R10(r13); \ + ld r11,PACA_EXGEN+EX_R11(r13); \ + GET_SCRATCH0(r13); \ + ##_H##rfid; \ + b . + +/* + * Real mode exceptions actually use this too, but alternate + * instruction code patches (which end up in the common .text area) + * cannot reach these if they are put there. + */ +USE_FIXED_SECTION(virt_trampolines) + MASKED_INTERRUPT() + MASKED_INTERRUPT(H) + +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER +TRAMP_REAL_BEGIN(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 . + +TRAMP_REAL_BEGIN(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 + +/* + * Ensure that any handlers that get invoked from the exception prologs + * above are below the first 64KB (0x10000) of the kernel image because + * the prologs assemble the addresses of these handlers using the + * LOAD_HANDLER macro, which uses an ori instruction. + */ + +/*** Common interrupt handlers ***/ + + + /* + * 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. + */ + +EXC_COMMON_BEGIN(ppc64_runlatch_on_trampoline) + b __ppc64_runlatch_on + +USE_FIXED_SECTION(virt_trampolines) + /* + * The __end_interrupts marker must be past the out-of-line (OOL) + * handlers, so that they are copied to real address 0x100 when running + * a relocatable kernel. This ensures they can be reached from the short + * trampoline handlers (like 0x4f00, 0x4f20, etc.) which branch + * directly, without using LOAD_HANDLER(). + */ + .align 7 + .globl __end_interrupts +__end_interrupts: +DEFINE_FIXED_SYMBOL(__end_interrupts) #ifdef CONFIG_PPC_970_NAP -power4_fixup_nap: +EXC_COMMON_BEGIN(power4_fixup_nap) andc r9,r9,r10 std r9,TI_LOCAL_FLAGS(r11) ld r10,_LINK(r1) /* make idle task do the */ @@ -1480,6 +1385,13 @@ power4_fixup_nap: blr #endif +CLOSE_FIXED_SECTION(real_vectors); +CLOSE_FIXED_SECTION(real_trampolines); +CLOSE_FIXED_SECTION(virt_vectors); +CLOSE_FIXED_SECTION(virt_trampolines); + +USE_TEXT_SECTION() + /* * Hash table stuff */ @@ -1625,3 +1537,39 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR) 1: addi r3,r1,STACK_FRAME_OVERHEAD bl kernel_bad_stack b 1b + +/* + * Called from arch_local_irq_enable when an interrupt needs + * 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 + * in the generated frame has EE set to 1 or the exception + * handler will not properly re-enable them. + */ +_GLOBAL(__replay_interrupt) + /* We are going to jump to the exception common code which + * will retrieve various register values from the PACA which + * we don't give a damn about, so we don't bother storing them. + */ + mfmsr r12 + mflr r11 + mfcr r9 + ori r12,r12,MSR_EE + cmpwi r3,0x900 + beq decrementer_common + cmpwi r3,0x500 + beq hardware_interrupt_common +BEGIN_FTR_SECTION + cmpwi r3,0xe80 + beq h_doorbell_common + cmpwi r3,0xea0 + beq h_virt_irq_common + cmpwi r3,0xe60 + beq hmi_exception_common +FTR_SECTION_ELSE + cmpwi r3,0xa00 + beq doorbell_super_common +ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) + blr |