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-rw-r--r--arch/powerpc/kernel/exceptions-64s.S2024
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..08992f8f5036 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:
+TRAMP_REAL_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