diff options
Diffstat (limited to 'arch/powerpc/kernel')
42 files changed, 1558 insertions, 375 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 1dda7012914..36c30f31ec9 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -55,7 +55,9 @@ obj-$(CONFIG_IBMVIO) += vio.o obj-$(CONFIG_IBMEBUS) += ibmebus.o obj-$(CONFIG_GENERIC_TBSYNC) += smp-tbsync.o obj-$(CONFIG_CRASH_DUMP) += crash_dump.o +ifeq ($(CONFIG_PPC32),y) obj-$(CONFIG_E500) += idle_e500.o +endif obj-$(CONFIG_6xx) += idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o obj-$(CONFIG_TAU) += tau_6xx.o obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o @@ -67,7 +69,7 @@ endif obj64-$(CONFIG_HIBERNATION) += swsusp_asm64.o obj-$(CONFIG_MODULES) += module.o module_$(CONFIG_WORD_SIZE).o obj-$(CONFIG_44x) += cpu_setup_44x.o -obj-$(CONFIG_FSL_BOOKE) += cpu_setup_fsl_booke.o dbell.o +obj-$(CONFIG_PPC_FSL_BOOK3E) += cpu_setup_fsl_booke.o dbell.o obj-$(CONFIG_PPC_BOOK3E_64) += dbell.o extra-y := head_$(CONFIG_WORD_SIZE).o @@ -127,6 +129,8 @@ ifneq ($(CONFIG_XMON)$(CONFIG_KEXEC),) obj-y += ppc_save_regs.o endif +obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o + # Disable GCOV in odd or sensitive code GCOV_PROFILE_prom_init.o := n GCOV_PROFILE_ftrace.o := n diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index b876e989220..8184ee97e48 100644 --- a/arch/powerpc/kernel/align.c +++ b/arch/powerpc/kernel/align.c @@ -889,7 +889,7 @@ int fix_alignment(struct pt_regs *regs) #ifdef CONFIG_PPC_FPU preempt_disable(); enable_kernel_fp(); - cvt_df(&data.dd, (float *)&data.v[4], ¤t->thread); + cvt_df(&data.dd, (float *)&data.v[4]); preempt_enable(); #else return 0; @@ -933,7 +933,7 @@ int fix_alignment(struct pt_regs *regs) #ifdef CONFIG_PPC_FPU preempt_disable(); enable_kernel_fp(); - cvt_fd((float *)&data.v[4], &data.dd, ¤t->thread); + cvt_fd((float *)&data.v[4], &data.dd); preempt_enable(); #else return 0; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 1c0607ddccc..bd0df2e6aa8 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -48,11 +48,11 @@ #ifdef CONFIG_PPC_ISERIES #include <asm/iseries/alpaca.h> #endif -#ifdef CONFIG_KVM +#if defined(CONFIG_KVM) || defined(CONFIG_KVM_GUEST) #include <linux/kvm_host.h> -#ifndef CONFIG_BOOKE -#include <asm/kvm_book3s.h> #endif +#if defined(CONFIG_KVM) && defined(CONFIG_PPC_BOOK3S) +#include <asm/kvm_book3s.h> #endif #ifdef CONFIG_PPC32 @@ -61,7 +61,7 @@ #endif #endif -#if defined(CONFIG_FSL_BOOKE) +#if defined(CONFIG_PPC_FSL_BOOK3E) #include "../mm/mmu_decl.h" #endif @@ -181,17 +181,19 @@ int main(void) offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid)); DEFINE(SLBSHADOW_STACKESID, offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].esid)); + DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area)); DEFINE(LPPACASRR0, offsetof(struct lppaca, saved_srr0)); DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1)); DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int)); DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int)); - DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area)); + DEFINE(LPPACA_DTLIDX, offsetof(struct lppaca, dtl_idx)); + DEFINE(PACA_DTL_RIDX, offsetof(struct paca_struct, dtl_ridx)); #endif /* CONFIG_PPC_STD_MMU_64 */ DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp)); DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id)); DEFINE(PACAKEXECSTATE, offsetof(struct paca_struct, kexec_state)); - DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr)); - DEFINE(PACA_STARTSPURR, offsetof(struct paca_struct, startspurr)); + DEFINE(PACA_STARTTIME, offsetof(struct paca_struct, starttime)); + DEFINE(PACA_STARTTIME_USER, offsetof(struct paca_struct, starttime_user)); DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time)); DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); @@ -394,12 +396,13 @@ int main(void) DEFINE(VCPU_HOST_STACK, offsetof(struct kvm_vcpu, arch.host_stack)); DEFINE(VCPU_HOST_PID, offsetof(struct kvm_vcpu, arch.host_pid)); DEFINE(VCPU_GPRS, offsetof(struct kvm_vcpu, arch.gpr)); - DEFINE(VCPU_MSR, offsetof(struct kvm_vcpu, arch.msr)); DEFINE(VCPU_SPRG4, offsetof(struct kvm_vcpu, arch.sprg4)); DEFINE(VCPU_SPRG5, offsetof(struct kvm_vcpu, arch.sprg5)); DEFINE(VCPU_SPRG6, offsetof(struct kvm_vcpu, arch.sprg6)); DEFINE(VCPU_SPRG7, offsetof(struct kvm_vcpu, arch.sprg7)); DEFINE(VCPU_SHADOW_PID, offsetof(struct kvm_vcpu, arch.shadow_pid)); + DEFINE(VCPU_SHARED, offsetof(struct kvm_vcpu, arch.shared)); + DEFINE(VCPU_SHARED_MSR, offsetof(struct kvm_vcpu_arch_shared, msr)); /* book3s */ #ifdef CONFIG_PPC_BOOK3S @@ -464,11 +467,27 @@ int main(void) DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr)); #endif /* CONFIG_PPC_BOOK3S */ #endif + +#ifdef CONFIG_KVM_GUEST + DEFINE(KVM_MAGIC_SCRATCH1, offsetof(struct kvm_vcpu_arch_shared, + scratch1)); + DEFINE(KVM_MAGIC_SCRATCH2, offsetof(struct kvm_vcpu_arch_shared, + scratch2)); + DEFINE(KVM_MAGIC_SCRATCH3, offsetof(struct kvm_vcpu_arch_shared, + scratch3)); + DEFINE(KVM_MAGIC_INT, offsetof(struct kvm_vcpu_arch_shared, + int_pending)); + DEFINE(KVM_MAGIC_MSR, offsetof(struct kvm_vcpu_arch_shared, msr)); + DEFINE(KVM_MAGIC_CRITICAL, offsetof(struct kvm_vcpu_arch_shared, + critical)); + DEFINE(KVM_MAGIC_SR, offsetof(struct kvm_vcpu_arch_shared, sr)); +#endif + #ifdef CONFIG_44x DEFINE(PGD_T_LOG2, PGD_T_LOG2); DEFINE(PTE_T_LOG2, PTE_T_LOG2); #endif -#ifdef CONFIG_FSL_BOOKE +#ifdef CONFIG_PPC_FSL_BOOK3E DEFINE(TLBCAM_SIZE, sizeof(struct tlbcam)); DEFINE(TLBCAM_MAS0, offsetof(struct tlbcam, MAS0)); DEFINE(TLBCAM_MAS1, offsetof(struct tlbcam, MAS1)); diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S index 7d606f89a83..e32b4a9a2c2 100644 --- a/arch/powerpc/kernel/cpu_setup_44x.S +++ b/arch/powerpc/kernel/cpu_setup_44x.S @@ -35,6 +35,7 @@ _GLOBAL(__setup_cpu_440grx) _GLOBAL(__setup_cpu_460ex) _GLOBAL(__setup_cpu_460gt) _GLOBAL(__setup_cpu_460sx) +_GLOBAL(__setup_cpu_apm821xx) mflr r4 bl __init_fpu_44x bl __fixup_440A_mcheck diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S index 0adb50ad803..894e64fa481 100644 --- a/arch/powerpc/kernel/cpu_setup_fsl_booke.S +++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S @@ -51,6 +51,7 @@ _GLOBAL(__e500_dcache_setup) isync blr +#ifdef CONFIG_PPC32 _GLOBAL(__setup_cpu_e200) /* enable dedicated debug exception handling resources (Debug APU) */ mfspr r3,SPRN_HID0 @@ -72,3 +73,17 @@ _GLOBAL(__setup_cpu_e500mc) bl __setup_e500mc_ivors mtlr r4 blr +#endif +/* Right now, restore and setup are the same thing */ +_GLOBAL(__restore_cpu_e5500) +_GLOBAL(__setup_cpu_e5500) + mflr r4 + bl __e500_icache_setup + bl __e500_dcache_setup +#ifdef CONFIG_PPC_BOOK3E_64 + bl .__setup_base_ivors +#else + bl __setup_e500mc_ivors +#endif + mtlr r4 + blr diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 1f9123f412e..96a908f1cd8 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -48,6 +48,7 @@ extern void __setup_cpu_440x5(unsigned long offset, struct cpu_spec* spec); extern void __setup_cpu_460ex(unsigned long offset, struct cpu_spec* spec); extern void __setup_cpu_460gt(unsigned long offset, struct cpu_spec* spec); extern void __setup_cpu_460sx(unsigned long offset, struct cpu_spec *spec); +extern void __setup_cpu_apm821xx(unsigned long offset, struct cpu_spec *spec); extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec); extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec); extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec); @@ -66,6 +67,10 @@ extern void __restore_cpu_ppc970(void); extern void __setup_cpu_power7(unsigned long offset, struct cpu_spec* spec); extern void __restore_cpu_power7(void); #endif /* CONFIG_PPC64 */ +#if defined(CONFIG_E500) +extern void __setup_cpu_e5500(unsigned long offset, struct cpu_spec* spec); +extern void __restore_cpu_e5500(void); +#endif /* CONFIG_E500 */ /* This table only contains "desktop" CPUs, it need to be filled with embedded * ones as well... @@ -1805,6 +1810,20 @@ static struct cpu_spec __initdata cpu_specs[] = { .machine_check = machine_check_440A, .platform = "ppc440", }, + { /* 464 in APM821xx */ + .pvr_mask = 0xffffff00, + .pvr_value = 0x12C41C80, + .cpu_name = "APM821XX", + .cpu_features = CPU_FTRS_44X, + .cpu_user_features = COMMON_USER_BOOKE | + PPC_FEATURE_HAS_FPU, + .mmu_features = MMU_FTR_TYPE_44x, + .icache_bsize = 32, + .dcache_bsize = 32, + .cpu_setup = __setup_cpu_apm821xx, + .machine_check = machine_check_440A, + .platform = "ppc440", + }, { /* 476 core */ .pvr_mask = 0xffff0000, .pvr_value = 0x11a50000, @@ -1891,7 +1910,9 @@ static struct cpu_spec __initdata cpu_specs[] = { .platform = "ppc5554", } #endif /* CONFIG_E200 */ +#endif /* CONFIG_PPC32 */ #ifdef CONFIG_E500 +#ifdef CONFIG_PPC32 { /* e500 */ .pvr_mask = 0xffff0000, .pvr_value = 0x80200000, @@ -1946,6 +1967,26 @@ static struct cpu_spec __initdata cpu_specs[] = { .machine_check = machine_check_e500mc, .platform = "ppce500mc", }, +#endif /* CONFIG_PPC32 */ + { /* e5500 */ + .pvr_mask = 0xffff0000, + .pvr_value = 0x80240000, + .cpu_name = "e5500", + .cpu_features = CPU_FTRS_E500MC, + .cpu_user_features = COMMON_USER_BOOKE, + .mmu_features = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS | + MMU_FTR_USE_TLBILX, + .icache_bsize = 64, + .dcache_bsize = 64, + .num_pmcs = 4, + .oprofile_cpu_type = "ppc/e500mc", + .oprofile_type = PPC_OPROFILE_FSL_EMB, + .cpu_setup = __setup_cpu_e5500, + .cpu_restore = __restore_cpu_e5500, + .machine_check = machine_check_e500mc, + .platform = "ppce5500", + }, +#ifdef CONFIG_PPC32 { /* default match */ .pvr_mask = 0x00000000, .pvr_value = 0x00000000, @@ -1960,8 +2001,8 @@ static struct cpu_spec __initdata cpu_specs[] = { .machine_check = machine_check_e500, .platform = "powerpc", } -#endif /* CONFIG_E500 */ #endif /* CONFIG_PPC32 */ +#endif /* CONFIG_E500 */ #ifdef CONFIG_PPC_BOOK3E_64 { /* This is a default entry to get going, to be replaced by diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c index 4457382f866..832c8c4db25 100644 --- a/arch/powerpc/kernel/crash.c +++ b/arch/powerpc/kernel/crash.c @@ -414,18 +414,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs) crash_kexec_wait_realmode(crashing_cpu); #endif - for_each_irq(i) { - struct irq_desc *desc = irq_to_desc(i); - - if (!desc || !desc->chip || !desc->chip->eoi) - continue; - - if (desc->status & IRQ_INPROGRESS) - desc->chip->eoi(i); - - if (!(desc->status & IRQ_DISABLED)) - desc->chip->shutdown(i); - } + machine_kexec_mask_interrupts(); /* * Call registered shutdown routines savely. Swap out diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 37771a51811..6e54a0fd31a 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -74,16 +74,17 @@ static int dma_iommu_dma_supported(struct device *dev, u64 mask) { struct iommu_table *tbl = get_iommu_table_base(dev); - if (!tbl || tbl->it_offset > mask) { - printk(KERN_INFO - "Warning: IOMMU offset too big for device mask\n"); - if (tbl) - printk(KERN_INFO - "mask: 0x%08llx, table offset: 0x%08lx\n", - mask, tbl->it_offset); - else - printk(KERN_INFO "mask: 0x%08llx, table unavailable\n", - mask); + if (!tbl) { + dev_info(dev, "Warning: IOMMU dma not supported: mask 0x%08llx" + ", table unavailable\n", mask); + return 0; + } + + if ((tbl->it_offset + tbl->it_size) > (mask >> IOMMU_PAGE_SHIFT)) { + dev_info(dev, "Warning: IOMMU window too big for device mask\n"); + dev_info(dev, "mask: 0x%08llx, table end: 0x%08lx\n", + mask, (tbl->it_offset + tbl->it_size) << + IOMMU_PAGE_SHIFT); return 0; } else return 1; diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index 84d6367ec00..cf02cad62d9 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -12,6 +12,7 @@ #include <linux/memblock.h> #include <asm/bug.h> #include <asm/abs_addr.h> +#include <asm/machdep.h> /* * Generic direct DMA implementation @@ -89,7 +90,7 @@ static int dma_direct_dma_supported(struct device *dev, u64 mask) /* Could be improved so platforms can set the limit in case * they have limited DMA windows */ - return mask >= (memblock_end_of_DRAM() - 1); + return mask >= get_dma_offset(dev) + (memblock_end_of_DRAM() - 1); #else return 1; #endif @@ -154,6 +155,23 @@ EXPORT_SYMBOL(dma_direct_ops); #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) +int dma_set_mask(struct device *dev, u64 dma_mask) +{ + struct dma_map_ops *dma_ops = get_dma_ops(dev); + + if (ppc_md.dma_set_mask) + return ppc_md.dma_set_mask(dev, dma_mask); + if (unlikely(dma_ops == NULL)) + return -EIO; + if (dma_ops->set_dma_mask != NULL) + return dma_ops->set_dma_mask(dev, dma_mask); + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + *dev->dma_mask = dma_mask; + return 0; +} +EXPORT_SYMBOL(dma_set_mask); + static int __init dma_init(void) { dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 42e9d908914..d82878c4daa 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -97,6 +97,24 @@ system_call_common: addi r9,r1,STACK_FRAME_OVERHEAD ld r11,exception_marker@toc(r2) std r11,-16(r9) /* "regshere" marker */ +#if defined(CONFIG_VIRT_CPU_ACCOUNTING) && defined(CONFIG_PPC_SPLPAR) +BEGIN_FW_FTR_SECTION + beq 33f + /* if from user, see if there are any DTL entries to process */ + ld r10,PACALPPACAPTR(r13) /* get ptr to VPA */ + ld r11,PACA_DTL_RIDX(r13) /* get log read index */ + ld r10,LPPACA_DTLIDX(r10) /* get log write index */ + cmpd cr1,r11,r10 + beq+ cr1,33f + bl .accumulate_stolen_time + REST_GPR(0,r1) + REST_4GPRS(3,r1) + REST_2GPRS(7,r1) + addi r9,r1,STACK_FRAME_OVERHEAD +33: +END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR) +#endif /* CONFIG_VIRT_CPU_ACCOUNTING && CONFIG_PPC_SPLPAR */ + #ifdef CONFIG_TRACE_IRQFLAGS bl .trace_hardirqs_on REST_GPR(0,r1) @@ -202,7 +220,9 @@ syscall_exit: bge- syscall_error syscall_error_cont: ld r7,_NIP(r1) +BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ +END_FTR_SECTION_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) andi. r6,r8,MSR_PR ld r4,_LINK(r1) /* @@ -419,6 +439,17 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) sync #endif /* CONFIG_SMP */ + /* + * If we optimise away the clear of the reservation in system + * calls because we know the CPU tracks the address of the + * reservation, then we need to clear it here to cover the + * case that the kernel context switch path has no larx + * instructions. + */ +BEGIN_FTR_SECTION + ldarx r6,0,r1 +END_FTR_SECTION_IFSET(CPU_FTR_STCX_CHECKS_ADDRESS) + addi r6,r4,-THREAD /* Convert THREAD to 'current' */ std r6,PACACURRENT(r13) /* Set new 'current' */ @@ -576,7 +607,16 @@ ALT_FW_FTR_SECTION_END_IFCLR(FW_FEATURE_ISERIES) andi. r0,r3,MSR_RI beq- unrecov_restore + /* + * Clear the reservation. If we know the CPU tracks the address of + * the reservation then we can potentially save some cycles and use + * a larx. On POWER6 and POWER7 this is significantly faster. + */ +BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ +FTR_SECTION_ELSE + ldarx r4,0,r1 +ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) /* * Clear RI before restoring r13. If we are returning to diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 39b0c48872d..9f8b01d6466 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -299,6 +299,12 @@ slb_miss_user_pseries: b . /* prevent spec. execution */ #endif /* __DISABLED__ */ +/* KVM's trampoline code needs to be close to the interrupt handlers */ + +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER +#include "../kvm/book3s_rmhandlers.S" +#endif + .align 7 .globl __end_interrupts __end_interrupts: diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index fc8f5b14019..e86c040ae58 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -163,24 +163,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX) /* * These are used in the alignment trap handler when emulating * single-precision loads and stores. - * We restore and save the fpscr so the task gets the same result - * and exceptions as if the cpu had performed the load or store. */ _GLOBAL(cvt_fd) - lfd 0,THREAD_FPSCR(r5) /* load up fpscr value */ - MTFSF_L(0) lfs 0,0(r3) stfd 0,0(r4) - mffs 0 - stfd 0,THREAD_FPSCR(r5) /* save new fpscr value */ blr _GLOBAL(cvt_df) - lfd 0,THREAD_FPSCR(r5) /* load up fpscr value */ - MTFSF_L(0) lfd 0,0(r3) stfs 0,0(r4) - mffs 0 - stfd 0,THREAD_FPSCR(r5) /* save new fpscr value */ blr diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index a90625f9b48..8278e8bad5a 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -923,11 +923,7 @@ initial_mmu: mtspr SPRN_PID,r0 sync - /* Configure and load two entries into TLB slots 62 and 63. - * In case we are pinning TLBs, these are reserved in by the - * other TLB functions. If not reserving, then it doesn't - * matter where they are loaded. - */ + /* Configure and load one entry into TLB slots 63 */ clrrwi r4,r4,10 /* Mask off the real page number */ ori r4,r4,(TLB_WR | TLB_EX) /* Set the write and execute bits */ diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index c571cd3c145..f0dd577e4a5 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -166,12 +166,6 @@ exception_marker: #include "exceptions-64s.S" #endif -/* KVM trampoline code needs to be close to the interrupt handlers */ - -#ifdef CONFIG_KVM_BOOK3S_64_HANDLER -#include "../kvm/book3s_rmhandlers.S" -#endif - _GLOBAL(generic_secondary_thread_init) mr r24,r3 diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 4faeba24785..529b817f473 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -152,8 +152,11 @@ _ENTRY(__early_start) /* Check to see if we're the second processor, and jump * to the secondary_start code if so */ - mfspr r24,SPRN_PIR - cmpwi r24,0 + lis r24, boot_cpuid@h + ori r24, r24, boot_cpuid@l + lwz r24, 0(r24) + cmpwi r24, -1 + mfspr r24,SPRN_PIR bne __secondary_start #endif @@ -175,6 +178,9 @@ _ENTRY(__early_start) li r0,0 stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1) + rlwinm r22,r1,0,0,31-THREAD_SHIFT /* current thread_info */ + stw r24, TI_CPU(r22) + bl early_init #ifdef CONFIG_RELOCATABLE diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c index 9b626cfffce..f62efdfd176 100644 --- a/arch/powerpc/kernel/ibmebus.c +++ b/arch/powerpc/kernel/ibmebus.c @@ -162,13 +162,10 @@ static int ibmebus_create_device(struct device_node *dn) dev->dev.bus = &ibmebus_bus_type; dev->dev.archdata.dma_ops = &ibmebus_dma_ops; - ret = of_device_register(dev); - if (ret) { - of_device_free(dev); - return ret; - } - - return 0; + ret = of_device_add(dev); + if (ret) + platform_device_put(dev); + return ret; } static int ibmebus_create_devices(const struct of_device_id *matches) diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 1903290f546..ce557f6f00f 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -587,8 +587,10 @@ struct irq_host *irq_alloc_host(struct device_node *of_node, * this will be fixed once slab is made available early * instead of the current cruft */ - if (mem_init_done) + if (mem_init_done) { + of_node_put(host->of_node); kfree(host); + } return NULL; } irq_map[0].host = host; @@ -1143,7 +1145,7 @@ static int virq_debug_show(struct seq_file *m, void *private) unsigned long flags; struct irq_desc *desc; const char *p; - char none[] = "none"; + static const char none[] = "none"; int i; seq_printf(m, "%-5s %-7s %-15s %s\n", "virq", "hwirq", diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index 7f61a3ac787..7a9db64f3f0 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -194,40 +194,6 @@ static int kgdb_dabr_match(struct pt_regs *regs) ptr = (unsigned long *)ptr32; \ } while (0) - -void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) -{ - unsigned long *ptr = gdb_regs; - int reg; - - memset(gdb_regs, 0, NUMREGBYTES); - - for (reg = 0; reg < 32; reg++) - PACK64(ptr, regs->gpr[reg]); - -#ifdef CONFIG_FSL_BOOKE -#ifdef CONFIG_SPE - for (reg = 0; reg < 32; reg++) - PACK64(ptr, current->thread.evr[reg]); -#else - ptr += 32; -#endif -#else - /* fp registers not used by kernel, leave zero */ - ptr += 32 * 8 / sizeof(long); -#endif - - PACK64(ptr, regs->nip); - PACK64(ptr, regs->msr); - PACK32(ptr, regs->ccr); - PACK64(ptr, regs->link); - PACK64(ptr, regs->ctr); - PACK32(ptr, regs->xer); - - BUG_ON((unsigned long)ptr > - (unsigned long)(((void *)gdb_regs) + NUMREGBYTES)); -} - void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) { struct pt_regs *regs = (struct pt_regs *)(p->thread.ksp + @@ -271,44 +237,140 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) (unsigned long)(((void *)gdb_regs) + NUMREGBYTES)); } -#define UNPACK64(dest, ptr) do { dest = *(ptr++); } while (0) +#define GDB_SIZEOF_REG sizeof(unsigned long) +#define GDB_SIZEOF_REG_U32 sizeof(u32) -#define UNPACK32(dest, ptr) do { \ - u32 *ptr32; \ - ptr32 = (u32 *)ptr; \ - dest = *(ptr32++); \ - ptr = (unsigned long *)ptr32; \ - } while (0) +#ifdef CONFIG_FSL_BOOKE +#define GDB_SIZEOF_FLOAT_REG sizeof(unsigned long) +#else +#define GDB_SIZEOF_FLOAT_REG sizeof(u64) +#endif -void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) +struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = { - unsigned long *ptr = gdb_regs; - int reg; - - for (reg = 0; reg < 32; reg++) - UNPACK64(regs->gpr[reg], ptr); + { "r0", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[0]) }, + { "r1", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[1]) }, + { "r2", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[2]) }, + { "r3", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[3]) }, + { "r4", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[4]) }, + { "r5", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[5]) }, + { "r6", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[6]) }, + { "r7", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[7]) }, + { "r8", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[8]) }, + { "r9", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[9]) }, + { "r10", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[10]) }, + { "r11", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[11]) }, + { "r12", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[12]) }, + { "r13", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[13]) }, + { "r14", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[14]) }, + { "r15", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[15]) }, + { "r16", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[16]) }, + { "r17", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[17]) }, + { "r18", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[18]) }, + { "r19", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[19]) }, + { "r20", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[20]) }, + { "r21", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[21]) }, + { "r22", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[22]) }, + { "r23", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[23]) }, + { "r24", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[24]) }, + { "r25", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[25]) }, + { "r26", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[26]) }, + { "r27", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[27]) }, + { "r28", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[28]) }, + { "r29", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[29]) }, + { "r30", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[30]) }, + { "r31", GDB_SIZEOF_REG, offsetof(struct pt_regs, gpr[31]) }, + + { "f0", GDB_SIZEOF_FLOAT_REG, 0 }, + { "f1", GDB_SIZEOF_FLOAT_REG, 1 }, + { "f2", GDB_SIZEOF_FLOAT_REG, 2 }, + { "f3", GDB_SIZEOF_FLOAT_REG, 3 }, + { "f4", GDB_SIZEOF_FLOAT_REG, 4 }, + { "f5", GDB_SIZEOF_FLOAT_REG, 5 }, + { "f6", GDB_SIZEOF_FLOAT_REG, 6 }, + { "f7", GDB_SIZEOF_FLOAT_REG, 7 }, + { "f8", GDB_SIZEOF_FLOAT_REG, 8 }, + { "f9", GDB_SIZEOF_FLOAT_REG, 9 }, + { "f10", GDB_SIZEOF_FLOAT_REG, 10 }, + { "f11", GDB_SIZEOF_FLOAT_REG, 11 }, + { "f12", GDB_SIZEOF_FLOAT_REG, 12 }, + { "f13", GDB_SIZEOF_FLOAT_REG, 13 }, + { "f14", GDB_SIZEOF_FLOAT_REG, 14 }, + { "f15", GDB_SIZEOF_FLOAT_REG, 15 }, + { "f16", GDB_SIZEOF_FLOAT_REG, 16 }, + { "f17", GDB_SIZEOF_FLOAT_REG, 17 }, + { "f18", GDB_SIZEOF_FLOAT_REG, 18 }, + { "f19", GDB_SIZEOF_FLOAT_REG, 19 }, + { "f20", GDB_SIZEOF_FLOAT_REG, 20 }, + { "f21", GDB_SIZEOF_FLOAT_REG, 21 }, + { "f22", GDB_SIZEOF_FLOAT_REG, 22 }, + { "f23", GDB_SIZEOF_FLOAT_REG, 23 }, + { "f24", GDB_SIZEOF_FLOAT_REG, 24 }, + { "f25", GDB_SIZEOF_FLOAT_REG, 25 }, + { "f26", GDB_SIZEOF_FLOAT_REG, 26 }, + { "f27", GDB_SIZEOF_FLOAT_REG, 27 }, + { "f28", GDB_SIZEOF_FLOAT_REG, 28 }, + { "f29", GDB_SIZEOF_FLOAT_REG, 29 }, + { "f30", GDB_SIZEOF_FLOAT_REG, 30 }, + { "f31", GDB_SIZEOF_FLOAT_REG, 31 }, + + { "pc", GDB_SIZEOF_REG, offsetof(struct pt_regs, nip) }, + { "msr", GDB_SIZEOF_REG, offsetof(struct pt_regs, msr) }, + { "cr", GDB_SIZEOF_REG_U32, offsetof(struct pt_regs, ccr) }, + { "lr", GDB_SIZEOF_REG, offsetof(struct pt_regs, link) }, + { "ctr", GDB_SIZEOF_REG_U32, offsetof(struct pt_regs, ctr) }, + { "xer", GDB_SIZEOF_REG, offsetof(struct pt_regs, xer) }, +}; -#ifdef CONFIG_FSL_BOOKE -#ifdef CONFIG_SPE - for (reg = 0; reg < 32; reg++) - UNPACK64(current->thread.evr[reg], ptr); +char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs) +{ + if (regno >= DBG_MAX_REG_NUM || regno < 0) + return NULL; + + if (regno < 32 || regno >= 64) + /* First 0 -> 31 gpr registers*/ + /* pc, msr, ls... registers 64 -> 69 */ + memcpy(mem, (void *)regs + dbg_reg_def[regno].offset, + dbg_reg_def[regno].size); + + if (regno >= 32 && regno < 64) { + /* FP registers 32 -> 63 */ +#if defined(CONFIG_FSL_BOOKE) && defined(CONFIG_SPE) + if (current) + memcpy(mem, current->thread.evr[regno-32], + dbg_reg_def[regno].size); #else - ptr += 32; + /* fp registers not used by kernel, leave zero */ + memset(mem, 0, dbg_reg_def[regno].size); #endif + } + + return dbg_reg_def[regno].name; +} + +int dbg_set_reg(int regno, void *mem, struct pt_regs *regs) +{ + if (regno >= DBG_MAX_REG_NUM || regno < 0) + return -EINVAL; + + if (regno < 32 || regno >= 64) + /* First 0 -> 31 gpr registers*/ + /* pc, msr, ls... registers 64 -> 69 */ + memcpy((void *)regs + dbg_reg_def[regno].offset, mem, + dbg_reg_def[regno].size); + + if (regno >= 32 && regno < 64) { + /* FP registers 32 -> 63 */ +#if defined(CONFIG_FSL_BOOKE) && defined(CONFIG_SPE) + memcpy(current->thread.evr[regno-32], mem, + dbg_reg_def[regno].size); #else - /* fp registers not used by kernel, leave zero */ - ptr += 32 * 8 / sizeof(int); + /* fp registers not used by kernel, leave zero */ + return 0; #endif + } - UNPACK64(regs->nip, ptr); - UNPACK64(regs->msr, ptr); - UNPACK32(regs->ccr, ptr); - UNPACK64(regs->link, ptr); - UNPACK64(regs->ctr, ptr); - UNPACK32(regs->xer, ptr); - - BUG_ON((unsigned long)ptr > - (unsigned long)(((void *)gdb_regs) + NUMREGBYTES)); + return 0; } void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc) diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c new file mode 100644 index 00000000000..428d0e538ae --- /dev/null +++ b/arch/powerpc/kernel/kvm.c @@ -0,0 +1,596 @@ +/* + * Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved. + * + * Authors: + * Alexander Graf <agraf@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/kvm_host.h> +#include <linux/init.h> +#include <linux/kvm_para.h> +#include <linux/slab.h> +#include <linux/of.h> + +#include <asm/reg.h> +#include <asm/sections.h> +#include <asm/cacheflush.h> +#include <asm/disassemble.h> + +#define KVM_MAGIC_PAGE (-4096L) +#define magic_var(x) KVM_MAGIC_PAGE + offsetof(struct kvm_vcpu_arch_shared, x) + +#define KVM_INST_LWZ 0x80000000 +#define KVM_INST_STW 0x90000000 +#define KVM_INST_LD 0xe8000000 +#define KVM_INST_STD 0xf8000000 +#define KVM_INST_NOP 0x60000000 +#define KVM_INST_B 0x48000000 +#define KVM_INST_B_MASK 0x03ffffff +#define KVM_INST_B_MAX 0x01ffffff + +#define KVM_MASK_RT 0x03e00000 +#define KVM_RT_30 0x03c00000 +#define KVM_MASK_RB 0x0000f800 +#define KVM_INST_MFMSR 0x7c0000a6 +#define KVM_INST_MFSPR_SPRG0 0x7c1042a6 +#define KVM_INST_MFSPR_SPRG1 0x7c1142a6 +#define KVM_INST_MFSPR_SPRG2 0x7c1242a6 +#define KVM_INST_MFSPR_SPRG3 0x7c1342a6 +#define KVM_INST_MFSPR_SRR0 0x7c1a02a6 +#define KVM_INST_MFSPR_SRR1 0x7c1b02a6 +#define KVM_INST_MFSPR_DAR 0x7c1302a6 +#define KVM_INST_MFSPR_DSISR 0x7c1202a6 + +#define KVM_INST_MTSPR_SPRG0 0x7c1043a6 +#define KVM_INST_MTSPR_SPRG1 0x7c1143a6 +#define KVM_INST_MTSPR_SPRG2 0x7c1243a6 +#define KVM_INST_MTSPR_SPRG3 0x7c1343a6 +#define KVM_INST_MTSPR_SRR0 0x7c1a03a6 +#define KVM_INST_MTSPR_SRR1 0x7c1b03a6 +#define KVM_INST_MTSPR_DAR 0x7c1303a6 +#define KVM_INST_MTSPR_DSISR 0x7c1203a6 + +#define KVM_INST_TLBSYNC 0x7c00046c +#define KVM_INST_MTMSRD_L0 0x7c000164 +#define KVM_INST_MTMSRD_L1 0x7c010164 +#define KVM_INST_MTMSR 0x7c000124 + +#define KVM_INST_WRTEEI_0 0x7c000146 +#define KVM_INST_WRTEEI_1 0x7c008146 + +#define KVM_INST_MTSRIN 0x7c0001e4 + +static bool kvm_patching_worked = true; +static char kvm_tmp[1024 * 1024]; +static int kvm_tmp_index; + +static inline void kvm_patch_ins(u32 *inst, u32 new_inst) +{ + *inst = new_inst; + flush_icache_range((ulong)inst, (ulong)inst + 4); +} + +static void kvm_patch_ins_ll(u32 *inst, long addr, u32 rt) +{ +#ifdef CONFIG_64BIT + kvm_patch_ins(inst, KVM_INST_LD | rt | (addr & 0x0000fffc)); +#else + kvm_patch_ins(inst, KVM_INST_LWZ | rt | (addr & 0x0000fffc)); +#endif +} + +static void kvm_patch_ins_ld(u32 *inst, long addr, u32 rt) +{ +#ifdef CONFIG_64BIT + kvm_patch_ins(inst, KVM_INST_LD | rt | (addr & 0x0000fffc)); +#else + kvm_patch_ins(inst, KVM_INST_LWZ | rt | ((addr + 4) & 0x0000fffc)); +#endif +} + +static void kvm_patch_ins_lwz(u32 *inst, long addr, u32 rt) +{ + kvm_patch_ins(inst, KVM_INST_LWZ | rt | (addr & 0x0000ffff)); +} + +static void kvm_patch_ins_std(u32 *inst, long addr, u32 rt) +{ +#ifdef CONFIG_64BIT + kvm_patch_ins(inst, KVM_INST_STD | rt | (addr & 0x0000fffc)); +#else + kvm_patch_ins(inst, KVM_INST_STW | rt | ((addr + 4) & 0x0000fffc)); +#endif +} + +static void kvm_patch_ins_stw(u32 *inst, long addr, u32 rt) +{ + kvm_patch_ins(inst, KVM_INST_STW | rt | (addr & 0x0000fffc)); +} + +static void kvm_patch_ins_nop(u32 *inst) +{ + kvm_patch_ins(inst, KVM_INST_NOP); +} + +static void kvm_patch_ins_b(u32 *inst, int addr) +{ +#ifdef CONFIG_RELOCATABLE + /* On relocatable kernels interrupts handlers and our code + can be in different regions, so we don't patch them */ + + extern u32 __end_interrupts; + if ((ulong)inst < (ulong)&__end_interrupts) + return; +#endif + + kvm_patch_ins(inst, KVM_INST_B | (addr & KVM_INST_B_MASK)); +} + +static u32 *kvm_alloc(int len) +{ + u32 *p; + + if ((kvm_tmp_index + len) > ARRAY_SIZE(kvm_tmp)) { + printk(KERN_ERR "KVM: No more space (%d + %d)\n", + kvm_tmp_index, len); + kvm_patching_worked = false; + return NULL; + } + + p = (void*)&kvm_tmp[kvm_tmp_index]; + kvm_tmp_index += len; + + return p; +} + +extern u32 kvm_emulate_mtmsrd_branch_offs; +extern u32 kvm_emulate_mtmsrd_reg_offs; +extern u32 kvm_emulate_mtmsrd_orig_ins_offs; +extern u32 kvm_emulate_mtmsrd_len; +extern u32 kvm_emulate_mtmsrd[]; + +static void kvm_patch_ins_mtmsrd(u32 *inst, u32 rt) +{ + u32 *p; + int distance_start; + int distance_end; + ulong next_inst; + + p = kvm_alloc(kvm_emulate_mtmsrd_len * 4); + if (!p) + return; + + /* Find out where we are and put everything there */ + distance_start = (ulong)p - (ulong)inst; + next_inst = ((ulong)inst + 4); + distance_end = next_inst - (ulong)&p[kvm_emulate_mtmsrd_branch_offs]; + + /* Make sure we only write valid b instructions */ + if (distance_start > KVM_INST_B_MAX) { + kvm_patching_worked = false; + return; + } + + /* Modify the chunk to fit the invocation */ + memcpy(p, kvm_emulate_mtmsrd, kvm_emulate_mtmsrd_len * 4); + p[kvm_emulate_mtmsrd_branch_offs] |= distance_end & KVM_INST_B_MASK; + switch (get_rt(rt)) { + case 30: + kvm_patch_ins_ll(&p[kvm_emulate_mtmsrd_reg_offs], + magic_var(scratch2), KVM_RT_30); + break; + case 31: + kvm_patch_ins_ll(&p[kvm_emulate_mtmsrd_reg_offs], + magic_var(scratch1), KVM_RT_30); + break; + default: + p[kvm_emulate_mtmsrd_reg_offs] |= rt; + break; + } + + p[kvm_emulate_mtmsrd_orig_ins_offs] = *inst; + flush_icache_range((ulong)p, (ulong)p + kvm_emulate_mtmsrd_len * 4); + + /* Patch the invocation */ + kvm_patch_ins_b(inst, distance_start); +} + +extern u32 kvm_emulate_mtmsr_branch_offs; +extern u32 kvm_emulate_mtmsr_reg1_offs; +extern u32 kvm_emulate_mtmsr_reg2_offs; +extern u32 kvm_emulate_mtmsr_orig_ins_offs; +extern u32 kvm_emulate_mtmsr_len; +extern u32 kvm_emulate_mtmsr[]; + +static void kvm_patch_ins_mtmsr(u32 *inst, u32 rt) +{ + u32 *p; + int distance_start; + int distance_end; + ulong next_inst; + + p = kvm_alloc(kvm_emulate_mtmsr_len * 4); + if (!p) + return; + + /* Find out where we are and put everything there */ + distance_start = (ulong)p - (ulong)inst; + next_inst = ((ulong)inst + 4); + distance_end = next_inst - (ulong)&p[kvm_emulate_mtmsr_branch_offs]; + + /* Make sure we only write valid b instructions */ + if (distance_start > KVM_INST_B_MAX) { + kvm_patching_worked = false; + return; + } + + /* Modify the chunk to fit the invocation */ + memcpy(p, kvm_emulate_mtmsr, kvm_emulate_mtmsr_len * 4); + p[kvm_emulate_mtmsr_branch_offs] |= distance_end & KVM_INST_B_MASK; + + /* Make clobbered registers work too */ + switch (get_rt(rt)) { + case 30: + kvm_patch_ins_ll(&p[kvm_emulate_mtmsr_reg1_offs], + magic_var(scratch2), KVM_RT_30); + kvm_patch_ins_ll(&p[kvm_emulate_mtmsr_reg2_offs], + magic_var(scratch2), KVM_RT_30); + break; + case 31: + kvm_patch_ins_ll(&p[kvm_emulate_mtmsr_reg1_offs], + magic_var(scratch1), KVM_RT_30); + kvm_patch_ins_ll(&p[kvm_emulate_mtmsr_reg2_offs], + magic_var(scratch1), KVM_RT_30); + break; + default: + p[kvm_emulate_mtmsr_reg1_offs] |= rt; + p[kvm_emulate_mtmsr_reg2_offs] |= rt; + break; + } + + p[kvm_emulate_mtmsr_orig_ins_offs] = *inst; + flush_icache_range((ulong)p, (ulong)p + kvm_emulate_mtmsr_len * 4); + + /* Patch the invocation */ + kvm_patch_ins_b(inst, distance_start); +} + +#ifdef CONFIG_BOOKE + +extern u32 kvm_emulate_wrteei_branch_offs; +extern u32 kvm_emulate_wrteei_ee_offs; +extern u32 kvm_emulate_wrteei_len; +extern u32 kvm_emulate_wrteei[]; + +static void kvm_patch_ins_wrteei(u32 *inst) +{ + u32 *p; + int distance_start; + int distance_end; + ulong next_inst; + + p = kvm_alloc(kvm_emulate_wrteei_len * 4); + if (!p) + return; + + /* Find out where we are and put everything there */ + distance_start = (ulong)p - (ulong)inst; + next_inst = ((ulong)inst + 4); + distance_end = next_inst - (ulong)&p[kvm_emulate_wrteei_branch_offs]; + + /* Make sure we only write valid b instructions */ + if (distance_start > KVM_INST_B_MAX) { + kvm_patching_worked = false; + return; + } + + /* Modify the chunk to fit the invocation */ + memcpy(p, kvm_emulate_wrteei, kvm_emulate_wrteei_len * 4); + p[kvm_emulate_wrteei_branch_offs] |= distance_end & KVM_INST_B_MASK; + p[kvm_emulate_wrteei_ee_offs] |= (*inst & MSR_EE); + flush_icache_range((ulong)p, (ulong)p + kvm_emulate_wrteei_len * 4); + + /* Patch the invocation */ + kvm_patch_ins_b(inst, distance_start); +} + +#endif + +#ifdef CONFIG_PPC_BOOK3S_32 + +extern u32 kvm_emulate_mtsrin_branch_offs; +extern u32 kvm_emulate_mtsrin_reg1_offs; +extern u32 kvm_emulate_mtsrin_reg2_offs; +extern u32 kvm_emulate_mtsrin_orig_ins_offs; +extern u32 kvm_emulate_mtsrin_len; +extern u32 kvm_emulate_mtsrin[]; + +static void kvm_patch_ins_mtsrin(u32 *inst, u32 rt, u32 rb) +{ + u32 *p; + int distance_start; + int distance_end; + ulong next_inst; + + p = kvm_alloc(kvm_emulate_mtsrin_len * 4); + if (!p) + return; + + /* Find out where we are and put everything there */ + distance_start = (ulong)p - (ulong)inst; + next_inst = ((ulong)inst + 4); + distance_end = next_inst - (ulong)&p[kvm_emulate_mtsrin_branch_offs]; + + /* Make sure we only write valid b instructions */ + if (distance_start > KVM_INST_B_MAX) { + kvm_patching_worked = false; + return; + } + + /* Modify the chunk to fit the invocation */ + memcpy(p, kvm_emulate_mtsrin, kvm_emulate_mtsrin_len * 4); + p[kvm_emulate_mtsrin_branch_offs] |= distance_end & KVM_INST_B_MASK; + p[kvm_emulate_mtsrin_reg1_offs] |= (rb << 10); + p[kvm_emulate_mtsrin_reg2_offs] |= rt; + p[kvm_emulate_mtsrin_orig_ins_offs] = *inst; + flush_icache_range((ulong)p, (ulong)p + kvm_emulate_mtsrin_len * 4); + + /* Patch the invocation */ + kvm_patch_ins_b(inst, distance_start); +} + +#endif + +static void kvm_map_magic_page(void *data) +{ + u32 *features = data; + + ulong in[8]; + ulong out[8]; + + in[0] = KVM_MAGIC_PAGE; + in[1] = KVM_MAGIC_PAGE; + + kvm_hypercall(in, out, HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE); + + *features = out[0]; +} + +static void kvm_check_ins(u32 *inst, u32 features) +{ + u32 _inst = *inst; + u32 inst_no_rt = _inst & ~KVM_MASK_RT; + u32 inst_rt = _inst & KVM_MASK_RT; + + switch (inst_no_rt) { + /* Loads */ + case KVM_INST_MFMSR: + kvm_patch_ins_ld(inst, magic_var(msr), inst_rt); + break; + case KVM_INST_MFSPR_SPRG0: + kvm_patch_ins_ld(inst, magic_var(sprg0), inst_rt); + break; + case KVM_INST_MFSPR_SPRG1: + kvm_patch_ins_ld(inst, magic_var(sprg1), inst_rt); + break; + case KVM_INST_MFSPR_SPRG2: + kvm_patch_ins_ld(inst, magic_var(sprg2), inst_rt); + break; + case KVM_INST_MFSPR_SPRG3: + kvm_patch_ins_ld(inst, magic_var(sprg3), inst_rt); + break; + case KVM_INST_MFSPR_SRR0: + kvm_patch_ins_ld(inst, magic_var(srr0), inst_rt); + break; + case KVM_INST_MFSPR_SRR1: + kvm_patch_ins_ld(inst, magic_var(srr1), inst_rt); + break; + case KVM_INST_MFSPR_DAR: + kvm_patch_ins_ld(inst, magic_var(dar), inst_rt); + break; + case KVM_INST_MFSPR_DSISR: + kvm_patch_ins_lwz(inst, magic_var(dsisr), inst_rt); + break; + + /* Stores */ + case KVM_INST_MTSPR_SPRG0: + kvm_patch_ins_std(inst, magic_var(sprg0), inst_rt); + break; + case KVM_INST_MTSPR_SPRG1: + kvm_patch_ins_std(inst, magic_var(sprg1), inst_rt); + break; + case KVM_INST_MTSPR_SPRG2: + kvm_patch_ins_std(inst, magic_var(sprg2), inst_rt); + break; + case KVM_INST_MTSPR_SPRG3: + kvm_patch_ins_std(inst, magic_var(sprg3), inst_rt); + break; + case KVM_INST_MTSPR_SRR0: + kvm_patch_ins_std(inst, magic_var(srr0), inst_rt); + break; + case KVM_INST_MTSPR_SRR1: + kvm_patch_ins_std(inst, magic_var(srr1), inst_rt); + break; + case KVM_INST_MTSPR_DAR: + kvm_patch_ins_std(inst, magic_var(dar), inst_rt); + break; + case KVM_INST_MTSPR_DSISR: + kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt); + break; + + /* Nops */ + case KVM_INST_TLBSYNC: + kvm_patch_ins_nop(inst); + break; + + /* Rewrites */ + case KVM_INST_MTMSRD_L1: + kvm_patch_ins_mtmsrd(inst, inst_rt); + break; + case KVM_INST_MTMSR: + case KVM_INST_MTMSRD_L0: + kvm_patch_ins_mtmsr(inst, inst_rt); + break; + } + + switch (inst_no_rt & ~KVM_MASK_RB) { +#ifdef CONFIG_PPC_BOOK3S_32 + case KVM_INST_MTSRIN: + if (features & KVM_MAGIC_FEAT_SR) { + u32 inst_rb = _inst & KVM_MASK_RB; + kvm_patch_ins_mtsrin(inst, inst_rt, inst_rb); + } + break; + break; +#endif + } + + switch (_inst) { +#ifdef CONFIG_BOOKE + case KVM_INST_WRTEEI_0: + case KVM_INST_WRTEEI_1: + kvm_patch_ins_wrteei(inst); + break; +#endif + } +} + +static void kvm_use_magic_page(void) +{ + u32 *p; + u32 *start, *end; + u32 tmp; + u32 features; + + /* Tell the host to map the magic page to -4096 on all CPUs */ + on_each_cpu(kvm_map_magic_page, &features, 1); + + /* Quick self-test to see if the mapping works */ + if (__get_user(tmp, (u32*)KVM_MAGIC_PAGE)) { + kvm_patching_worked = false; + return; + } + + /* Now loop through all code and find instructions */ + start = (void*)_stext; + end = (void*)_etext; + + for (p = start; p < end; p++) + kvm_check_ins(p, features); + + printk(KERN_INFO "KVM: Live patching for a fast VM %s\n", + kvm_patching_worked ? "worked" : "failed"); +} + +unsigned long kvm_hypercall(unsigned long *in, + unsigned long *out, + unsigned long nr) +{ + unsigned long register r0 asm("r0"); + unsigned long register r3 asm("r3") = in[0]; + unsigned long register r4 asm("r4") = in[1]; + unsigned long register r5 asm("r5") = in[2]; + unsigned long register r6 asm("r6") = in[3]; + unsigned long register r7 asm("r7") = in[4]; + unsigned long register r8 asm("r8") = in[5]; + unsigned long register r9 asm("r9") = in[6]; + unsigned long register r10 asm("r10") = in[7]; + unsigned long register r11 asm("r11") = nr; + unsigned long register r12 asm("r12"); + + asm volatile("bl kvm_hypercall_start" + : "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6), + "=r"(r7), "=r"(r8), "=r"(r9), "=r"(r10), "=r"(r11), + "=r"(r12) + : "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "r"(r8), + "r"(r9), "r"(r10), "r"(r11) + : "memory", "cc", "xer", "ctr", "lr"); + + out[0] = r4; + out[1] = r5; + out[2] = r6; + out[3] = r7; + out[4] = r8; + out[5] = r9; + out[6] = r10; + out[7] = r11; + + return r3; +} +EXPORT_SYMBOL_GPL(kvm_hypercall); + +static int kvm_para_setup(void) +{ + extern u32 kvm_hypercall_start; + struct device_node *hyper_node; + u32 *insts; + int len, i; + + hyper_node = of_find_node_by_path("/hypervisor"); + if (!hyper_node) + return -1; + + insts = (u32*)of_get_property(hyper_node, "hcall-instructions", &len); + if (len % 4) + return -1; + if (len > (4 * 4)) + return -1; + + for (i = 0; i < (len / 4); i++) + kvm_patch_ins(&(&kvm_hypercall_start)[i], insts[i]); + + return 0; +} + +static __init void kvm_free_tmp(void) +{ + unsigned long start, end; + + start = (ulong)&kvm_tmp[kvm_tmp_index + (PAGE_SIZE - 1)] & PAGE_MASK; + end = (ulong)&kvm_tmp[ARRAY_SIZE(kvm_tmp)] & PAGE_MASK; + + /* Free the tmp space we don't need */ + for (; start < end; start += PAGE_SIZE) { + ClearPageReserved(virt_to_page(start)); + init_page_count(virt_to_page(start)); + free_page(start); + totalram_pages++; + } +} + +static int __init kvm_guest_init(void) +{ + if (!kvm_para_available()) + goto free_tmp; + + if (kvm_para_setup()) + goto free_tmp; + + if (kvm_para_has_feature(KVM_FEATURE_MAGIC_PAGE)) + kvm_use_magic_page(); + +#ifdef CONFIG_PPC_BOOK3S_64 + /* Enable napping */ + powersave_nap = 1; +#endif + +free_tmp: + kvm_free_tmp(); + + return 0; +} + +postcore_initcall(kvm_guest_init); diff --git a/arch/powerpc/kernel/kvm_emul.S b/arch/powerpc/kernel/kvm_emul.S new file mode 100644 index 00000000000..f2b1b2523e6 --- /dev/null +++ b/arch/powerpc/kernel/kvm_emul.S @@ -0,0 +1,302 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright SUSE Linux Products GmbH 2010 + * + * Authors: Alexander Graf <agraf@suse.de> + */ + +#include <asm/ppc_asm.h> +#include <asm/kvm_asm.h> +#include <asm/reg.h> +#include <asm/page.h> +#include <asm/asm-offsets.h> + +/* Hypercall entry point. Will be patched with device tree instructions. */ + +.global kvm_hypercall_start +kvm_hypercall_start: + li r3, -1 + nop + nop + nop + blr + +#define KVM_MAGIC_PAGE (-4096) + +#ifdef CONFIG_64BIT +#define LL64(reg, offs, reg2) ld reg, (offs)(reg2) +#define STL64(reg, offs, reg2) std reg, (offs)(reg2) +#else +#define LL64(reg, offs, reg2) lwz reg, (offs + 4)(reg2) +#define STL64(reg, offs, reg2) stw reg, (offs + 4)(reg2) +#endif + +#define SCRATCH_SAVE \ + /* Enable critical section. We are critical if \ + shared->critical == r1 */ \ + STL64(r1, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); \ + \ + /* Save state */ \ + PPC_STL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \ + PPC_STL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \ + mfcr r31; \ + stw r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); + +#define SCRATCH_RESTORE \ + /* Restore state */ \ + PPC_LL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \ + lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); \ + mtcr r30; \ + PPC_LL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \ + \ + /* Disable critical section. We are critical if \ + shared->critical == r1 and r2 is always != r1 */ \ + STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); + +.global kvm_emulate_mtmsrd +kvm_emulate_mtmsrd: + + SCRATCH_SAVE + + /* Put MSR & ~(MSR_EE|MSR_RI) in r31 */ + LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + lis r30, (~(MSR_EE | MSR_RI))@h + ori r30, r30, (~(MSR_EE | MSR_RI))@l + and r31, r31, r30 + + /* OR the register's (MSR_EE|MSR_RI) on MSR */ +kvm_emulate_mtmsrd_reg: + ori r30, r0, 0 + andi. r30, r30, (MSR_EE|MSR_RI) + or r31, r31, r30 + + /* Put MSR back into magic page */ + STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + + /* Check if we have to fetch an interrupt */ + lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0) + cmpwi r31, 0 + beq+ no_check + + /* Check if we may trigger an interrupt */ + andi. r30, r30, MSR_EE + beq no_check + + SCRATCH_RESTORE + + /* Nag hypervisor */ +kvm_emulate_mtmsrd_orig_ins: + tlbsync + + b kvm_emulate_mtmsrd_branch + +no_check: + + SCRATCH_RESTORE + + /* Go back to caller */ +kvm_emulate_mtmsrd_branch: + b . +kvm_emulate_mtmsrd_end: + +.global kvm_emulate_mtmsrd_branch_offs +kvm_emulate_mtmsrd_branch_offs: + .long (kvm_emulate_mtmsrd_branch - kvm_emulate_mtmsrd) / 4 + +.global kvm_emulate_mtmsrd_reg_offs +kvm_emulate_mtmsrd_reg_offs: + .long (kvm_emulate_mtmsrd_reg - kvm_emulate_mtmsrd) / 4 + +.global kvm_emulate_mtmsrd_orig_ins_offs +kvm_emulate_mtmsrd_orig_ins_offs: + .long (kvm_emulate_mtmsrd_orig_ins - kvm_emulate_mtmsrd) / 4 + +.global kvm_emulate_mtmsrd_len +kvm_emulate_mtmsrd_len: + .long (kvm_emulate_mtmsrd_end - kvm_emulate_mtmsrd) / 4 + + +#define MSR_SAFE_BITS (MSR_EE | MSR_CE | MSR_ME | MSR_RI) +#define MSR_CRITICAL_BITS ~MSR_SAFE_BITS + +.global kvm_emulate_mtmsr +kvm_emulate_mtmsr: + + SCRATCH_SAVE + + /* Fetch old MSR in r31 */ + LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + + /* Find the changed bits between old and new MSR */ +kvm_emulate_mtmsr_reg1: + ori r30, r0, 0 + xor r31, r30, r31 + + /* Check if we need to really do mtmsr */ + LOAD_REG_IMMEDIATE(r30, MSR_CRITICAL_BITS) + and. r31, r31, r30 + + /* No critical bits changed? Maybe we can stay in the guest. */ + beq maybe_stay_in_guest + +do_mtmsr: + + SCRATCH_RESTORE + + /* Just fire off the mtmsr if it's critical */ +kvm_emulate_mtmsr_orig_ins: + mtmsr r0 + + b kvm_emulate_mtmsr_branch + +maybe_stay_in_guest: + + /* Get the target register in r30 */ +kvm_emulate_mtmsr_reg2: + ori r30, r0, 0 + + /* Check if we have to fetch an interrupt */ + lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0) + cmpwi r31, 0 + beq+ no_mtmsr + + /* Check if we may trigger an interrupt */ + andi. r31, r30, MSR_EE + beq no_mtmsr + + b do_mtmsr + +no_mtmsr: + + /* Put MSR into magic page because we don't call mtmsr */ + STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + + SCRATCH_RESTORE + + /* Go back to caller */ +kvm_emulate_mtmsr_branch: + b . +kvm_emulate_mtmsr_end: + +.global kvm_emulate_mtmsr_branch_offs +kvm_emulate_mtmsr_branch_offs: + .long (kvm_emulate_mtmsr_branch - kvm_emulate_mtmsr) / 4 + +.global kvm_emulate_mtmsr_reg1_offs +kvm_emulate_mtmsr_reg1_offs: + .long (kvm_emulate_mtmsr_reg1 - kvm_emulate_mtmsr) / 4 + +.global kvm_emulate_mtmsr_reg2_offs +kvm_emulate_mtmsr_reg2_offs: + .long (kvm_emulate_mtmsr_reg2 - kvm_emulate_mtmsr) / 4 + +.global kvm_emulate_mtmsr_orig_ins_offs +kvm_emulate_mtmsr_orig_ins_offs: + .long (kvm_emulate_mtmsr_orig_ins - kvm_emulate_mtmsr) / 4 + +.global kvm_emulate_mtmsr_len +kvm_emulate_mtmsr_len: + .long (kvm_emulate_mtmsr_end - kvm_emulate_mtmsr) / 4 + + + +.global kvm_emulate_wrteei +kvm_emulate_wrteei: + + SCRATCH_SAVE + + /* Fetch old MSR in r31 */ + LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + + /* Remove MSR_EE from old MSR */ + li r30, 0 + ori r30, r30, MSR_EE + andc r31, r31, r30 + + /* OR new MSR_EE onto the old MSR */ +kvm_emulate_wrteei_ee: + ori r31, r31, 0 + + /* Write new MSR value back */ + STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + + SCRATCH_RESTORE + + /* Go back to caller */ +kvm_emulate_wrteei_branch: + b . +kvm_emulate_wrteei_end: + +.global kvm_emulate_wrteei_branch_offs +kvm_emulate_wrteei_branch_offs: + .long (kvm_emulate_wrteei_branch - kvm_emulate_wrteei) / 4 + +.global kvm_emulate_wrteei_ee_offs +kvm_emulate_wrteei_ee_offs: + .long (kvm_emulate_wrteei_ee - kvm_emulate_wrteei) / 4 + +.global kvm_emulate_wrteei_len +kvm_emulate_wrteei_len: + .long (kvm_emulate_wrteei_end - kvm_emulate_wrteei) / 4 + + +.global kvm_emulate_mtsrin +kvm_emulate_mtsrin: + + SCRATCH_SAVE + + LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) + andi. r31, r31, MSR_DR | MSR_IR + beq kvm_emulate_mtsrin_reg1 + + SCRATCH_RESTORE + +kvm_emulate_mtsrin_orig_ins: + nop + b kvm_emulate_mtsrin_branch + +kvm_emulate_mtsrin_reg1: + /* rX >> 26 */ + rlwinm r30,r0,6,26,29 + +kvm_emulate_mtsrin_reg2: + stw r0, (KVM_MAGIC_PAGE + KVM_MAGIC_SR)(r30) + + SCRATCH_RESTORE + + /* Go back to caller */ +kvm_emulate_mtsrin_branch: + b . +kvm_emulate_mtsrin_end: + +.global kvm_emulate_mtsrin_branch_offs +kvm_emulate_mtsrin_branch_offs: + .long (kvm_emulate_mtsrin_branch - kvm_emulate_mtsrin) / 4 + +.global kvm_emulate_mtsrin_reg1_offs +kvm_emulate_mtsrin_reg1_offs: + .long (kvm_emulate_mtsrin_reg1 - kvm_emulate_mtsrin) / 4 + +.global kvm_emulate_mtsrin_reg2_offs +kvm_emulate_mtsrin_reg2_offs: + .long (kvm_emulate_mtsrin_reg2 - kvm_emulate_mtsrin) / 4 + +.global kvm_emulate_mtsrin_orig_ins_offs +kvm_emulate_mtsrin_orig_ins_offs: + .long (kvm_emulate_mtsrin_orig_ins - kvm_emulate_mtsrin) / 4 + +.global kvm_emulate_mtsrin_len +kvm_emulate_mtsrin_len: + .long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4 diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c index c1fd0f9658f..c834757bebc 100644 --- a/arch/powerpc/kernel/legacy_serial.c +++ b/arch/powerpc/kernel/legacy_serial.c @@ -52,14 +52,14 @@ static int __init add_legacy_port(struct device_node *np, int want_index, phys_addr_t taddr, unsigned long irq, upf_t flags, int irq_check_parent) { - const u32 *clk, *spd; + const __be32 *clk, *spd; u32 clock = BASE_BAUD * 16; int index; /* get clock freq. if present */ clk = of_get_property(np, "clock-frequency", NULL); if (clk && *clk) - clock = *clk; + clock = be32_to_cpup(clk); /* get default speed if present */ spd = of_get_property(np, "current-speed", NULL); @@ -109,7 +109,7 @@ static int __init add_legacy_port(struct device_node *np, int want_index, legacy_serial_infos[index].taddr = taddr; legacy_serial_infos[index].np = of_node_get(np); legacy_serial_infos[index].clock = clock; - legacy_serial_infos[index].speed = spd ? *spd : 0; + legacy_serial_infos[index].speed = spd ? be32_to_cpup(spd) : 0; legacy_serial_infos[index].irq_check_parent = irq_check_parent; printk(KERN_DEBUG "Found legacy serial port %d for %s\n", @@ -168,7 +168,7 @@ static int __init add_legacy_soc_port(struct device_node *np, static int __init add_legacy_isa_port(struct device_node *np, struct device_node *isa_brg) { - const u32 *reg; + const __be32 *reg; const char *typep; int index = -1; u64 taddr; @@ -181,7 +181,7 @@ static int __init add_legacy_isa_port(struct device_node *np, return -1; /* Verify it's an IO port, we don't support anything else */ - if (!(reg[0] & 0x00000001)) + if (!(be32_to_cpu(reg[0]) & 0x00000001)) return -1; /* Now look for an "ibm,aix-loc" property that gives us ordering @@ -202,7 +202,7 @@ static int __init add_legacy_isa_port(struct device_node *np, taddr = 0; /* Add port, irq will be dealt with later */ - return add_legacy_port(np, index, UPIO_PORT, reg[1], taddr, + return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]), taddr, NO_IRQ, UPF_BOOT_AUTOCONF, 0); } @@ -251,9 +251,9 @@ static int __init add_legacy_pci_port(struct device_node *np, * we get to their "reg" property */ if (np != pci_dev) { - const u32 *reg = of_get_property(np, "reg", NULL); - if (reg && (*reg < 4)) - index = lindex = *reg; + const __be32 *reg = of_get_property(np, "reg", NULL); + if (reg && (be32_to_cpup(reg) < 4)) + index = lindex = be32_to_cpup(reg); } /* Local index means it's the Nth port in the PCI chip. Unfortunately @@ -507,7 +507,7 @@ static int __init check_legacy_serial_console(void) struct device_node *prom_stdout = NULL; int i, speed = 0, offset = 0; const char *name; - const u32 *spd; + const __be32 *spd; DBG(" -> check_legacy_serial_console()\n"); @@ -547,7 +547,7 @@ static int __init check_legacy_serial_console(void) } spd = of_get_property(prom_stdout, "current-speed", NULL); if (spd) - speed = *spd; + speed = be32_to_cpup(spd); if (strcmp(name, "serial") != 0) goto not_found; diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c index 50362b6ef6e..16468362ad5 100644 --- a/arch/powerpc/kernel/lparcfg.c +++ b/arch/powerpc/kernel/lparcfg.c @@ -56,7 +56,7 @@ static unsigned long get_purr(void) for_each_possible_cpu(cpu) { if (firmware_has_feature(FW_FEATURE_ISERIES)) - sum_purr += lppaca[cpu].emulated_time_base; + sum_purr += lppaca_of(cpu).emulated_time_base; else { struct cpu_usage *cu; @@ -263,7 +263,7 @@ static void parse_ppp_data(struct seq_file *m) ppp_data.active_system_procs); /* pool related entries are apropriate for shared configs */ - if (lppaca[0].shared_proc) { + if (lppaca_of(0).shared_proc) { unsigned long pool_idle_time, pool_procs; seq_printf(m, "pool=%d\n", ppp_data.pool_num); @@ -460,8 +460,8 @@ static void pseries_cmo_data(struct seq_file *m) return; for_each_possible_cpu(cpu) { - cmo_faults += lppaca[cpu].cmo_faults; - cmo_fault_time += lppaca[cpu].cmo_fault_time; + cmo_faults += lppaca_of(cpu).cmo_faults; + cmo_fault_time += lppaca_of(cpu).cmo_fault_time; } seq_printf(m, "cmo_faults=%lu\n", cmo_faults); @@ -479,8 +479,8 @@ static void splpar_dispatch_data(struct seq_file *m) unsigned long dispatch_dispersions = 0; for_each_possible_cpu(cpu) { - dispatches += lppaca[cpu].yield_count; - dispatch_dispersions += lppaca[cpu].dispersion_count; + dispatches += lppaca_of(cpu).yield_count; + dispatch_dispersions += lppaca_of(cpu).dispersion_count; } seq_printf(m, "dispatches=%lu\n", dispatches); @@ -545,7 +545,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v) seq_printf(m, "partition_potential_processors=%d\n", partition_potential_processors); - seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); + seq_printf(m, "shared_processor_mode=%d\n", lppaca_of(0).shared_proc); seq_printf(m, "slb_size=%d\n", mmu_slb_size); @@ -780,6 +780,7 @@ static const struct file_operations lparcfg_fops = { .write = lparcfg_write, .open = lparcfg_open, .release = single_release, + .llseek = seq_lseek, }; static int __init lparcfg_init(void) diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c index dd6c141f166..df7e20c191c 100644 --- a/arch/powerpc/kernel/machine_kexec.c +++ b/arch/powerpc/kernel/machine_kexec.c @@ -14,10 +14,34 @@ #include <linux/threads.h> #include <linux/memblock.h> #include <linux/of.h> +#include <linux/irq.h> + #include <asm/machdep.h> #include <asm/prom.h> #include <asm/sections.h> +void machine_kexec_mask_interrupts(void) { + unsigned int i; + + for_each_irq(i) { + struct irq_desc *desc = irq_to_desc(i); + + if (!desc || !desc->chip) + continue; + + if (desc->chip->eoi && + desc->status & IRQ_INPROGRESS) + desc->chip->eoi(i); + + if (desc->chip->mask) + desc->chip->mask(i); + + if (desc->chip->disable && + !(desc->status & IRQ_DISABLED)) + desc->chip->disable(i); + } +} + void machine_crash_shutdown(struct pt_regs *regs) { if (ppc_md.machine_crash_shutdown) diff --git a/arch/powerpc/kernel/machine_kexec_32.c b/arch/powerpc/kernel/machine_kexec_32.c index ae63a964b85..e63f2e7d2ef 100644 --- a/arch/powerpc/kernel/machine_kexec_32.c +++ b/arch/powerpc/kernel/machine_kexec_32.c @@ -39,6 +39,10 @@ void default_machine_kexec(struct kimage *image) /* Interrupts aren't acceptable while we reboot */ local_irq_disable(); + /* mask each interrupt so we are in a more sane state for the + * kexec kernel */ + machine_kexec_mask_interrupts(); + page_list = image->head; /* we need both effective and real address here */ diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index d0a26f1770f..ebf9846f3c3 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -27,6 +27,20 @@ extern unsigned long __toc_start; #ifdef CONFIG_PPC_BOOK3S /* + * We only have to have statically allocated lppaca structs on + * legacy iSeries, which supports at most 64 cpus. + */ +#ifdef CONFIG_PPC_ISERIES +#if NR_CPUS < 64 +#define NR_LPPACAS NR_CPUS +#else +#define NR_LPPACAS 64 +#endif +#else /* not iSeries */ +#define NR_LPPACAS 1 +#endif + +/* * The structure which the hypervisor knows about - this structure * should not cross a page boundary. The vpa_init/register_vpa call * is now known to fail if the lppaca structure crosses a page @@ -36,7 +50,7 @@ extern unsigned long __toc_start; * will suffice to ensure that it doesn't cross a page boundary. */ struct lppaca lppaca[] = { - [0 ... (NR_CPUS-1)] = { + [0 ... (NR_LPPACAS-1)] = { .desc = 0xd397d781, /* "LpPa" */ .size = sizeof(struct lppaca), .dyn_proc_status = 2, @@ -49,6 +63,54 @@ struct lppaca lppaca[] = { }, }; +static struct lppaca *extra_lppacas; +static long __initdata lppaca_size; + +static void allocate_lppacas(int nr_cpus, unsigned long limit) +{ + if (nr_cpus <= NR_LPPACAS) + return; + + lppaca_size = PAGE_ALIGN(sizeof(struct lppaca) * + (nr_cpus - NR_LPPACAS)); + extra_lppacas = __va(memblock_alloc_base(lppaca_size, + PAGE_SIZE, limit)); +} + +static struct lppaca *new_lppaca(int cpu) +{ + struct lppaca *lp; + + if (cpu < NR_LPPACAS) + return &lppaca[cpu]; + + lp = extra_lppacas + (cpu - NR_LPPACAS); + *lp = lppaca[0]; + + return lp; +} + +static void free_lppacas(void) +{ + long new_size = 0, nr; + + if (!lppaca_size) + return; + nr = num_possible_cpus() - NR_LPPACAS; + if (nr > 0) + new_size = PAGE_ALIGN(nr * sizeof(struct lppaca)); + if (new_size >= lppaca_size) + return; + + memblock_free(__pa(extra_lppacas) + new_size, lppaca_size - new_size); + lppaca_size = new_size; +} + +#else + +static inline void allocate_lppacas(int nr_cpus, unsigned long limit) { } +static inline void free_lppacas(void) { } + #endif /* CONFIG_PPC_BOOK3S */ #ifdef CONFIG_PPC_STD_MMU_64 @@ -88,7 +150,7 @@ void __init initialise_paca(struct paca_struct *new_paca, int cpu) unsigned long kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL; #ifdef CONFIG_PPC_BOOK3S - new_paca->lppaca_ptr = &lppaca[cpu]; + new_paca->lppaca_ptr = new_lppaca(cpu); #else new_paca->kernel_pgd = swapper_pg_dir; #endif @@ -127,7 +189,7 @@ void __init allocate_pacas(void) * the first segment. On iSeries they must be within the area mapped * by the HV, which is HvPagesToMap * HVPAGESIZE bytes. */ - limit = min(0x10000000ULL, memblock.rmo_size); + limit = min(0x10000000ULL, ppc64_rma_size); if (firmware_has_feature(FW_FEATURE_ISERIES)) limit = min(limit, HvPagesToMap * HVPAGESIZE); @@ -144,6 +206,8 @@ void __init allocate_pacas(void) printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n", paca_size, nr_cpus, paca); + allocate_lppacas(nr_cpus, limit); + /* Can't use for_each_*_cpu, as they aren't functional yet */ for (cpu = 0; cpu < nr_cpus; cpu++) initialise_paca(&paca[cpu], cpu); @@ -164,4 +228,6 @@ void __init free_unused_pacas(void) paca_size - new_size); paca_size = new_size; + + free_lppacas(); } diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 9021c4ad4bb..10a44e68ef1 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1090,8 +1090,6 @@ void __devinit pcibios_setup_bus_devices(struct pci_bus *bus) bus->number, bus->self ? pci_name(bus->self) : "PHB"); list_for_each_entry(dev, &bus->devices, bus_list) { - struct dev_archdata *sd = &dev->dev.archdata; - /* Cardbus can call us to add new devices to a bus, so ignore * those who are already fully discovered */ @@ -1107,7 +1105,7 @@ void __devinit pcibios_setup_bus_devices(struct pci_bus *bus) set_dev_node(&dev->dev, pcibus_to_node(dev->bus)); /* Hook up default DMA ops */ - sd->dma_ops = pci_dma_ops; + set_dma_ops(&dev->dev, pci_dma_ops); set_dma_offset(&dev->dev, PCI_DRAM_OFFSET); /* Additional platform DMA/iommu setup */ diff --git a/arch/powerpc/kernel/ppc970-pmu.c b/arch/powerpc/kernel/ppc970-pmu.c index 8eff48e20db..3fee685de4d 100644 --- a/arch/powerpc/kernel/ppc970-pmu.c +++ b/arch/powerpc/kernel/ppc970-pmu.c @@ -169,9 +169,11 @@ static int p970_marked_instr_event(u64 event) switch (unit) { case PM_VPU: mask = 0x4c; /* byte 0 bits 2,3,6 */ + break; case PM_LSU0: /* byte 2 bits 0,2,3,4,6; all of byte 1 */ mask = 0x085dff00; + break; case PM_LSU1L: mask = 0x50 << 24; /* byte 3 bits 4,6 */ break; diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index b1c648a36b0..84906d3fc86 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -517,7 +517,6 @@ struct task_struct *__switch_to(struct task_struct *prev, account_system_vtime(current); account_process_vtime(current); - calculate_steal_time(); /* * We can't take a PMU exception inside _switch() since there is a @@ -1298,14 +1297,3 @@ unsigned long randomize_et_dyn(unsigned long base) return ret; } - -#ifdef CONFIG_SMP -int arch_sd_sibling_asym_packing(void) -{ - if (cpu_has_feature(CPU_FTR_ASYM_SMT)) { - printk_once(KERN_INFO "Enabling Asymmetric SMT scheduling\n"); - return SD_ASYM_PACKING; - } - return 0; -} -#endif diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index fed9bf6187d..9e3132db718 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -66,6 +66,7 @@ int __initdata iommu_is_off; int __initdata iommu_force_on; unsigned long tce_alloc_start, tce_alloc_end; +u64 ppc64_rma_size; #endif static int __init early_parse_mem(char *p) @@ -98,7 +99,7 @@ static void __init move_device_tree(void) if ((memory_limit && (start + size) > memory_limit) || overlaps_crashkernel(start, size)) { - p = __va(memblock_alloc_base(size, PAGE_SIZE, memblock.rmo_size)); + p = __va(memblock_alloc(size, PAGE_SIZE)); memcpy(p, initial_boot_params, size); initial_boot_params = (struct boot_param_header *)p; DBG("Moved device tree to 0x%p\n", p); @@ -363,10 +364,15 @@ static int __init early_init_dt_scan_cpus(unsigned long node, return 0; } -void __init early_init_dt_scan_chosen_arch(unsigned long node) +int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname, + int depth, void *data) { unsigned long *lprop; + /* Use common scan routine to determine if this is the chosen node */ + if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) + return 0; + #ifdef CONFIG_PPC64 /* check if iommu is forced on or off */ if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) @@ -398,6 +404,9 @@ void __init early_init_dt_scan_chosen_arch(unsigned long node) if (lprop) crashk_res.end = crashk_res.start + *lprop - 1; #endif + + /* break now */ + return 1; } #ifdef CONFIG_PPC_PSERIES @@ -492,7 +501,7 @@ static int __init early_init_dt_scan_memory_ppc(unsigned long node, void __init early_init_dt_add_memory_arch(u64 base, u64 size) { -#if defined(CONFIG_PPC64) +#ifdef CONFIG_PPC64 if (iommu_is_off) { if (base >= 0x80000000ul) return; @@ -501,9 +510,13 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) } #endif - memblock_add(base, size); - + /* First MEMBLOCK added, do some special initializations */ + if (memstart_addr == ~(phys_addr_t)0) + setup_initial_memory_limit(base, size); memstart_addr = min((u64)memstart_addr, base); + + /* Add the chunk to the MEMBLOCK list */ + memblock_add(base, size); } u64 __init early_init_dt_alloc_memory_arch(u64 size, u64 align) @@ -655,7 +668,6 @@ static void __init phyp_dump_reserve_mem(void) static inline void __init phyp_dump_reserve_mem(void) {} #endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */ - void __init early_init_devtree(void *params) { phys_addr_t limit; @@ -679,10 +691,11 @@ void __init early_init_devtree(void *params) * device-tree, including the platform type, initrd location and * size, TCE reserve, and more ... */ - of_scan_flat_dt(early_init_dt_scan_chosen, NULL); + of_scan_flat_dt(early_init_dt_scan_chosen_ppc, NULL); /* Scan memory nodes and rebuild MEMBLOCKs */ memblock_init(); + of_scan_flat_dt(early_init_dt_scan_root, NULL); of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 11f3cd9c832..a9b32967cff 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -1406,37 +1406,42 @@ static long ppc_del_hwdebug(struct task_struct *child, long addr, long data) * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls, * we mark them as obsolete now, they will be removed in a future version */ -static long arch_ptrace_old(struct task_struct *child, long request, long addr, - long data) +static long arch_ptrace_old(struct task_struct *child, long request, + unsigned long addr, unsigned long data) { + void __user *datavp = (void __user *) data; + switch (request) { case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ return copy_regset_to_user(child, &user_ppc_native_view, REGSET_GPR, 0, 32 * sizeof(long), - (void __user *) data); + datavp); case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ return copy_regset_from_user(child, &user_ppc_native_view, REGSET_GPR, 0, 32 * sizeof(long), - (const void __user *) data); + datavp); case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */ return copy_regset_to_user(child, &user_ppc_native_view, REGSET_FPR, 0, 32 * sizeof(double), - (void __user *) data); + datavp); case PPC_PTRACE_SETFPREGS: /* Set FPRs 0 - 31. */ return copy_regset_from_user(child, &user_ppc_native_view, REGSET_FPR, 0, 32 * sizeof(double), - (const void __user *) data); + datavp); } return -EPERM; } -long arch_ptrace(struct task_struct *child, long request, long addr, long data) +long arch_ptrace(struct task_struct *child, long request, + unsigned long addr, unsigned long data) { int ret = -EPERM; + void __user *datavp = (void __user *) data; + unsigned long __user *datalp = datavp; switch (request) { /* read the word at location addr in the USER area. */ @@ -1446,11 +1451,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = -EIO; /* convert to index and check */ #ifdef CONFIG_PPC32 - index = (unsigned long) addr >> 2; + index = addr >> 2; if ((addr & 3) || (index > PT_FPSCR) || (child->thread.regs == NULL)) #else - index = (unsigned long) addr >> 3; + index = addr >> 3; if ((addr & 7) || (index > PT_FPSCR)) #endif break; @@ -1463,7 +1468,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) tmp = ((unsigned long *)child->thread.fpr) [TS_FPRWIDTH * (index - PT_FPR0)]; } - ret = put_user(tmp,(unsigned long __user *) data); + ret = put_user(tmp, datalp); break; } @@ -1474,11 +1479,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = -EIO; /* convert to index and check */ #ifdef CONFIG_PPC32 - index = (unsigned long) addr >> 2; + index = addr >> 2; if ((addr & 3) || (index > PT_FPSCR) || (child->thread.regs == NULL)) #else - index = (unsigned long) addr >> 3; + index = addr >> 3; if ((addr & 7) || (index > PT_FPSCR)) #endif break; @@ -1525,11 +1530,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) dbginfo.features = 0; #endif /* CONFIG_PPC_ADV_DEBUG_REGS */ - if (!access_ok(VERIFY_WRITE, data, + if (!access_ok(VERIFY_WRITE, datavp, sizeof(struct ppc_debug_info))) return -EFAULT; - ret = __copy_to_user((struct ppc_debug_info __user *)data, - &dbginfo, sizeof(struct ppc_debug_info)) ? + ret = __copy_to_user(datavp, &dbginfo, + sizeof(struct ppc_debug_info)) ? -EFAULT : 0; break; } @@ -1537,11 +1542,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) case PPC_PTRACE_SETHWDEBUG: { struct ppc_hw_breakpoint bp_info; - if (!access_ok(VERIFY_READ, data, + if (!access_ok(VERIFY_READ, datavp, sizeof(struct ppc_hw_breakpoint))) return -EFAULT; - ret = __copy_from_user(&bp_info, - (struct ppc_hw_breakpoint __user *)data, + ret = __copy_from_user(&bp_info, datavp, sizeof(struct ppc_hw_breakpoint)) ? -EFAULT : 0; if (!ret) @@ -1560,11 +1564,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) if (addr > 0) break; #ifdef CONFIG_PPC_ADV_DEBUG_REGS - ret = put_user(child->thread.dac1, - (unsigned long __user *)data); + ret = put_user(child->thread.dac1, datalp); #else - ret = put_user(child->thread.dabr, - (unsigned long __user *)data); + ret = put_user(child->thread.dabr, datalp); #endif break; } @@ -1580,7 +1582,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) return copy_regset_to_user(child, &user_ppc_native_view, REGSET_GPR, 0, sizeof(struct pt_regs), - (void __user *) data); + datavp); #ifdef CONFIG_PPC64 case PTRACE_SETREGS64: @@ -1589,19 +1591,19 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) return copy_regset_from_user(child, &user_ppc_native_view, REGSET_GPR, 0, sizeof(struct pt_regs), - (const void __user *) data); + datavp); case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */ return copy_regset_to_user(child, &user_ppc_native_view, REGSET_FPR, 0, sizeof(elf_fpregset_t), - (void __user *) data); + datavp); case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */ return copy_regset_from_user(child, &user_ppc_native_view, REGSET_FPR, 0, sizeof(elf_fpregset_t), - (const void __user *) data); + datavp); #ifdef CONFIG_ALTIVEC case PTRACE_GETVRREGS: @@ -1609,40 +1611,40 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) REGSET_VMX, 0, (33 * sizeof(vector128) + sizeof(u32)), - (void __user *) data); + datavp); case PTRACE_SETVRREGS: return copy_regset_from_user(child, &user_ppc_native_view, REGSET_VMX, 0, (33 * sizeof(vector128) + sizeof(u32)), - (const void __user *) data); + datavp); #endif #ifdef CONFIG_VSX case PTRACE_GETVSRREGS: return copy_regset_to_user(child, &user_ppc_native_view, REGSET_VSX, 0, 32 * sizeof(double), - (void __user *) data); + datavp); case PTRACE_SETVSRREGS: return copy_regset_from_user(child, &user_ppc_native_view, REGSET_VSX, 0, 32 * sizeof(double), - (const void __user *) data); + datavp); #endif #ifdef CONFIG_SPE case PTRACE_GETEVRREGS: /* Get the child spe register state. */ return copy_regset_to_user(child, &user_ppc_native_view, REGSET_SPE, 0, 35 * sizeof(u32), - (void __user *) data); + datavp); case PTRACE_SETEVRREGS: /* Set the child spe register state. */ return copy_regset_from_user(child, &user_ppc_native_view, REGSET_SPE, 0, 35 * sizeof(u32), - (const void __user *) data); + datavp); #endif /* Old reverse args ptrace callss */ @@ -1681,7 +1683,7 @@ long do_syscall_trace_enter(struct pt_regs *regs) if (unlikely(current->audit_context)) { #ifdef CONFIG_PPC64 - if (!test_thread_flag(TIF_32BIT)) + if (!is_32bit_task()) audit_syscall_entry(AUDIT_ARCH_PPC64, regs->gpr[0], regs->gpr[3], regs->gpr[4], diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 41048de3c6c..8fe8bc61c10 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -805,7 +805,7 @@ static void rtas_percpu_suspend_me(void *info) __rtas_suspend_cpu((struct rtas_suspend_me_data *)info, 1); } -static int rtas_ibm_suspend_me(struct rtas_args *args) +int rtas_ibm_suspend_me(struct rtas_args *args) { long state; long rc; @@ -855,7 +855,7 @@ static int rtas_ibm_suspend_me(struct rtas_args *args) return atomic_read(&data.error); } #else /* CONFIG_PPC_PSERIES */ -static int rtas_ibm_suspend_me(struct rtas_args *args) +int rtas_ibm_suspend_me(struct rtas_args *args) { return -ENOSYS; } @@ -969,7 +969,7 @@ void __init rtas_initialize(void) */ #ifdef CONFIG_PPC64 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR)) { - rtas_region = min(memblock.rmo_size, RTAS_INSTANTIATE_MAX); + rtas_region = min(ppc64_rma_size, RTAS_INSTANTIATE_MAX); ibm_suspend_me_token = rtas_token("ibm,suspend-me"); } #endif diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c index 67a84d8f118..2b442e6c21e 100644 --- a/arch/powerpc/kernel/rtas_flash.c +++ b/arch/powerpc/kernel/rtas_flash.c @@ -716,6 +716,7 @@ static const struct file_operations rtas_flash_operations = { .write = rtas_flash_write, .open = rtas_excl_open, .release = rtas_flash_release, + .llseek = default_llseek, }; static const struct file_operations manage_flash_operations = { @@ -724,6 +725,7 @@ static const struct file_operations manage_flash_operations = { .write = manage_flash_write, .open = rtas_excl_open, .release = rtas_excl_release, + .llseek = default_llseek, }; static const struct file_operations validate_flash_operations = { @@ -732,6 +734,7 @@ static const struct file_operations validate_flash_operations = { .write = validate_flash_write, .open = rtas_excl_open, .release = validate_flash_release, + .llseek = default_llseek, }; static int __init rtas_flash_init(void) diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c index 638883e23e3..0438f819fe6 100644 --- a/arch/powerpc/kernel/rtasd.c +++ b/arch/powerpc/kernel/rtasd.c @@ -354,6 +354,7 @@ static const struct file_operations proc_rtas_log_operations = { .poll = rtas_log_poll, .open = rtas_log_open, .release = rtas_log_release, + .llseek = noop_llseek, }; static int enable_surveillance(int timeout) diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 93666f9cabf..1d2fbc90530 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -46,7 +46,7 @@ extern void bootx_init(unsigned long r4, unsigned long phys); -int boot_cpuid; +int boot_cpuid = -1; EXPORT_SYMBOL_GPL(boot_cpuid); int boot_cpuid_phys; @@ -246,7 +246,7 @@ static void __init irqstack_early_init(void) unsigned int i; /* interrupt stacks must be in lowmem, we get that for free on ppc32 - * as the memblock is limited to lowmem by MEMBLOCK_REAL_LIMIT */ + * as the memblock is limited to lowmem by default */ for_each_possible_cpu(i) { softirq_ctx[i] = (struct thread_info *) __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index e72690ec9b8..2a178b0ebcd 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -486,7 +486,7 @@ static void __init emergency_stack_init(void) * bringup, we need to get at them in real mode. This means they * must also be within the RMO region. */ - limit = min(slb0_limit(), memblock.rmo_size); + limit = min(slb0_limit(), ppc64_rma_size); for_each_possible_cpu(i) { unsigned long sp; diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 0008bc58e82..68034bbf2e4 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -508,9 +508,6 @@ int __devinit start_secondary(void *unused) if (smp_ops->take_timebase) smp_ops->take_timebase(); - if (system_state > SYSTEM_BOOTING) - snapshot_timebase(); - secondary_cpu_time_init(); ipi_call_lock(); @@ -575,11 +572,18 @@ void __init smp_cpus_done(unsigned int max_cpus) free_cpumask_var(old_mask); - snapshot_timebases(); - dump_numa_cpu_topology(); } +int arch_sd_sibling_asym_packing(void) +{ + if (cpu_has_feature(CPU_FTR_ASYM_SMT)) { + printk_once(KERN_INFO "Enabling Asymmetric SMT scheduling\n"); + return SD_ASYM_PACKING; + } + return 0; +} + #ifdef CONFIG_HOTPLUG_CPU int __cpu_disable(void) { diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 54888eb10c3..010406958d9 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -161,10 +161,9 @@ extern struct timezone sys_tz; static long timezone_offset; unsigned long ppc_proc_freq; -EXPORT_SYMBOL(ppc_proc_freq); +EXPORT_SYMBOL_GPL(ppc_proc_freq); unsigned long ppc_tb_freq; - -static DEFINE_PER_CPU(u64, last_jiffy); +EXPORT_SYMBOL_GPL(ppc_tb_freq); #ifdef CONFIG_VIRT_CPU_ACCOUNTING /* @@ -185,6 +184,8 @@ DEFINE_PER_CPU(unsigned long, cputime_scaled_last_delta); cputime_t cputime_one_jiffy; +void (*dtl_consumer)(struct dtl_entry *, u64); + static void calc_cputime_factors(void) { struct div_result res; @@ -200,62 +201,153 @@ static void calc_cputime_factors(void) } /* - * Read the PURR on systems that have it, otherwise the timebase. + * Read the SPURR on systems that have it, otherwise the PURR, + * or if that doesn't exist return the timebase value passed in. */ -static u64 read_purr(void) +static u64 read_spurr(u64 tb) { + if (cpu_has_feature(CPU_FTR_SPURR)) + return mfspr(SPRN_SPURR); if (cpu_has_feature(CPU_FTR_PURR)) return mfspr(SPRN_PURR); - return mftb(); + return tb; } +#ifdef CONFIG_PPC_SPLPAR + /* - * Read the SPURR on systems that have it, otherwise the purr + * Scan the dispatch trace log and count up the stolen time. + * Should be called with interrupts disabled. */ -static u64 read_spurr(u64 purr) +static u64 scan_dispatch_log(u64 stop_tb) { - /* - * cpus without PURR won't have a SPURR - * We already know the former when we use this, so tell gcc - */ - if (cpu_has_feature(CPU_FTR_PURR) && cpu_has_feature(CPU_FTR_SPURR)) - return mfspr(SPRN_SPURR); - return purr; + u64 i = local_paca->dtl_ridx; + struct dtl_entry *dtl = local_paca->dtl_curr; + struct dtl_entry *dtl_end = local_paca->dispatch_log_end; + struct lppaca *vpa = local_paca->lppaca_ptr; + u64 tb_delta; + u64 stolen = 0; + u64 dtb; + + if (i == vpa->dtl_idx) + return 0; + while (i < vpa->dtl_idx) { + if (dtl_consumer) + dtl_consumer(dtl, i); + dtb = dtl->timebase; + tb_delta = dtl->enqueue_to_dispatch_time + + dtl->ready_to_enqueue_time; + barrier(); + if (i + N_DISPATCH_LOG < vpa->dtl_idx) { + /* buffer has overflowed */ + i = vpa->dtl_idx - N_DISPATCH_LOG; + dtl = local_paca->dispatch_log + (i % N_DISPATCH_LOG); + continue; + } + if (dtb > stop_tb) + break; + stolen += tb_delta; + ++i; + ++dtl; + if (dtl == dtl_end) + dtl = local_paca->dispatch_log; + } + local_paca->dtl_ridx = i; + local_paca->dtl_curr = dtl; + return stolen; } /* + * Accumulate stolen time by scanning the dispatch trace log. + * Called on entry from user mode. + */ +void accumulate_stolen_time(void) +{ + u64 sst, ust; + + sst = scan_dispatch_log(get_paca()->starttime_user); + ust = scan_dispatch_log(get_paca()->starttime); + get_paca()->system_time -= sst; + get_paca()->user_time -= ust; + get_paca()->stolen_time += ust + sst; +} + +static inline u64 calculate_stolen_time(u64 stop_tb) +{ + u64 stolen = 0; + + if (get_paca()->dtl_ridx != get_paca()->lppaca_ptr->dtl_idx) { + stolen = scan_dispatch_log(stop_tb); + get_paca()->system_time -= stolen; + } + + stolen += get_paca()->stolen_time; + get_paca()->stolen_time = 0; + return stolen; +} + +#else /* CONFIG_PPC_SPLPAR */ +static inline u64 calculate_stolen_time(u64 stop_tb) +{ + return 0; +} + +#endif /* CONFIG_PPC_SPLPAR */ + +/* * Account time for a transition between system, hard irq * or soft irq state. */ void account_system_vtime(struct task_struct *tsk) { - u64 now, nowscaled, delta, deltascaled, sys_time; + u64 now, nowscaled, delta, deltascaled; unsigned long flags; + u64 stolen, udelta, sys_scaled, user_scaled; local_irq_save(flags); - now = read_purr(); + now = mftb(); nowscaled = read_spurr(now); - delta = now - get_paca()->startpurr; + get_paca()->system_time += now - get_paca()->starttime; + get_paca()->starttime = now; deltascaled = nowscaled - get_paca()->startspurr; - get_paca()->startpurr = now; get_paca()->startspurr = nowscaled; - if (!in_interrupt()) { - /* deltascaled includes both user and system time. - * Hence scale it based on the purr ratio to estimate - * the system time */ - sys_time = get_paca()->system_time; - if (get_paca()->user_time) - deltascaled = deltascaled * sys_time / - (sys_time + get_paca()->user_time); - delta += sys_time; - get_paca()->system_time = 0; + + stolen = calculate_stolen_time(now); + + delta = get_paca()->system_time; + get_paca()->system_time = 0; + udelta = get_paca()->user_time - get_paca()->utime_sspurr; + get_paca()->utime_sspurr = get_paca()->user_time; + + /* + * Because we don't read the SPURR on every kernel entry/exit, + * deltascaled includes both user and system SPURR ticks. + * Apportion these ticks to system SPURR ticks and user + * SPURR ticks in the same ratio as the system time (delta) + * and user time (udelta) values obtained from the timebase + * over the same interval. The system ticks get accounted here; + * the user ticks get saved up in paca->user_time_scaled to be + * used by account_process_tick. + */ + sys_scaled = delta; + user_scaled = udelta; + if (deltascaled != delta + udelta) { + if (udelta) { + sys_scaled = deltascaled * delta / (delta + udelta); + user_scaled = deltascaled - sys_scaled; + } else { + sys_scaled = deltascaled; + } + } + get_paca()->user_time_scaled += user_scaled; + + if (in_irq() || idle_task(smp_processor_id()) != tsk) { + account_system_time(tsk, 0, delta, sys_scaled); + if (stolen) + account_steal_time(stolen); + } else { + account_idle_time(delta + stolen); } - if (in_irq() || idle_task(smp_processor_id()) != tsk) - account_system_time(tsk, 0, delta, deltascaled); - else - account_idle_time(delta); - __get_cpu_var(cputime_last_delta) = delta; - __get_cpu_var(cputime_scaled_last_delta) = deltascaled; local_irq_restore(flags); } EXPORT_SYMBOL_GPL(account_system_vtime); @@ -265,125 +357,26 @@ EXPORT_SYMBOL_GPL(account_system_vtime); * by the exception entry and exit code to the generic process * user and system time records. * Must be called with interrupts disabled. + * Assumes that account_system_vtime() has been called recently + * (i.e. since the last entry from usermode) so that + * get_paca()->user_time_scaled is up to date. */ void account_process_tick(struct task_struct *tsk, int user_tick) { cputime_t utime, utimescaled; utime = get_paca()->user_time; + utimescaled = get_paca()->user_time_scaled; get_paca()->user_time = 0; - utimescaled = cputime_to_scaled(utime); + get_paca()->user_time_scaled = 0; + get_paca()->utime_sspurr = 0; account_user_time(tsk, utime, utimescaled); } -/* - * Stuff for accounting stolen time. - */ -struct cpu_purr_data { - int initialized; /* thread is running */ - u64 tb; /* last TB value read */ - u64 purr; /* last PURR value read */ - u64 spurr; /* last SPURR value read */ -}; - -/* - * Each entry in the cpu_purr_data array is manipulated only by its - * "owner" cpu -- usually in the timer interrupt but also occasionally - * in process context for cpu online. As long as cpus do not touch - * each others' cpu_purr_data, disabling local interrupts is - * sufficient to serialize accesses. - */ -static DEFINE_PER_CPU(struct cpu_purr_data, cpu_purr_data); - -static void snapshot_tb_and_purr(void *data) -{ - unsigned long flags; - struct cpu_purr_data *p = &__get_cpu_var(cpu_purr_data); - - local_irq_save(flags); - p->tb = get_tb_or_rtc(); - p->purr = mfspr(SPRN_PURR); - wmb(); - p->initialized = 1; - local_irq_restore(flags); -} - -/* - * Called during boot when all cpus have come up. - */ -void snapshot_timebases(void) -{ - if (!cpu_has_feature(CPU_FTR_PURR)) - return; - on_each_cpu(snapshot_tb_and_purr, NULL, 1); -} - -/* - * Must be called with interrupts disabled. - */ -void calculate_steal_time(void) -{ - u64 tb, purr; - s64 stolen; - struct cpu_purr_data *pme; - - pme = &__get_cpu_var(cpu_purr_data); - if (!pme->initialized) - return; /* !CPU_FTR_PURR or early in early boot */ - tb = mftb(); - purr = mfspr(SPRN_PURR); - stolen = (tb - pme->tb) - (purr - pme->purr); - if (stolen > 0) { - if (idle_task(smp_processor_id()) != current) - account_steal_time(stolen); - else - account_idle_time(stolen); - } - pme->tb = tb; - pme->purr = purr; -} - -#ifdef CONFIG_PPC_SPLPAR -/* - * Must be called before the cpu is added to the online map when - * a cpu is being brought up at runtime. - */ -static void snapshot_purr(void) -{ - struct cpu_purr_data *pme; - unsigned long flags; - - if (!cpu_has_feature(CPU_FTR_PURR)) - return; - local_irq_save(flags); - pme = &__get_cpu_var(cpu_purr_data); - pme->tb = mftb(); - pme->purr = mfspr(SPRN_PURR); - pme->initialized = 1; - local_irq_restore(flags); -} - -#endif /* CONFIG_PPC_SPLPAR */ - #else /* ! CONFIG_VIRT_CPU_ACCOUNTING */ #define calc_cputime_factors() -#define calculate_steal_time() do { } while (0) #endif -#if !(defined(CONFIG_VIRT_CPU_ACCOUNTING) && defined(CONFIG_PPC_SPLPAR)) -#define snapshot_purr() do { } while (0) -#endif - -/* - * Called when a cpu comes up after the system has finished booting, - * i.e. as a result of a hotplug cpu action. - */ -void snapshot_timebase(void) -{ - __get_cpu_var(last_jiffy) = get_tb_or_rtc(); - snapshot_purr(); -} - void __delay(unsigned long loops) { unsigned long start; @@ -585,8 +578,6 @@ void timer_interrupt(struct pt_regs * regs) old_regs = set_irq_regs(regs); irq_enter(); - calculate_steal_time(); - if (test_irq_work_pending()) { clear_irq_work_pending(); irq_work_run(); diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index a45a63c3a0c..1b2cdc8eec9 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -538,6 +538,11 @@ int machine_check_e500(struct pt_regs *regs) return 0; } + +int machine_check_generic(struct pt_regs *regs) +{ + return 0; +} #elif defined(CONFIG_E200) int machine_check_e200(struct pt_regs *regs) { diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index 13002fe206e..fd8728729ab 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -159,7 +159,7 @@ static void dump_vdso_pages(struct vm_area_struct * vma) { int i; - if (!vma || test_thread_flag(TIF_32BIT)) { + if (!vma || is_32bit_task()) { printk("vDSO32 @ %016lx:\n", (unsigned long)vdso32_kbase); for (i=0; i<vdso32_pages; i++) { struct page *pg = virt_to_page(vdso32_kbase + @@ -170,7 +170,7 @@ static void dump_vdso_pages(struct vm_area_struct * vma) dump_one_vdso_page(pg, upg); } } - if (!vma || !test_thread_flag(TIF_32BIT)) { + if (!vma || !is_32bit_task()) { printk("vDSO64 @ %016lx:\n", (unsigned long)vdso64_kbase); for (i=0; i<vdso64_pages; i++) { struct page *pg = virt_to_page(vdso64_kbase + @@ -200,7 +200,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) return 0; #ifdef CONFIG_PPC64 - if (test_thread_flag(TIF_32BIT)) { + if (is_32bit_task()) { vdso_pagelist = vdso32_pagelist; vdso_pages = vdso32_pages; vdso_base = VDSO32_MBASE; diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile index 51ead52141b..9a7946c4173 100644 --- a/arch/powerpc/kernel/vdso32/Makefile +++ b/arch/powerpc/kernel/vdso32/Makefile @@ -14,10 +14,10 @@ obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) GCOV_PROFILE := n -EXTRA_CFLAGS := -shared -fno-common -fno-builtin -EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso32.so.1 \ +ccflags-y := -shared -fno-common -fno-builtin +ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) -EXTRA_AFLAGS := -D__VDSO32__ -s +asflags-y := -D__VDSO32__ -s obj-y += vdso32_wrapper.o extra-y += vdso32.lds diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile index 79da65d44a2..8c500d8622e 100644 --- a/arch/powerpc/kernel/vdso64/Makefile +++ b/arch/powerpc/kernel/vdso64/Makefile @@ -9,10 +9,10 @@ obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) GCOV_PROFILE := n -EXTRA_CFLAGS := -shared -fno-common -fno-builtin -EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ +ccflags-y := -shared -fno-common -fno-builtin +ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) -EXTRA_AFLAGS := -D__VDSO64__ -s +asflags-y := -D__VDSO64__ -s obj-y += vdso64_wrapper.o extra-y += vdso64.lds diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index fa3469ddaef..441d2a722f0 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -238,9 +238,7 @@ static inline void vio_cmo_dealloc(struct vio_dev *viodev, size_t size) * memory in this pool does not change. */ if (spare_needed && reserve_freed) { - tmp = min(spare_needed, min(reserve_freed, - (viodev->cmo.entitled - - VIO_CMO_MIN_ENT))); + tmp = min3(spare_needed, reserve_freed, (viodev->cmo.entitled - VIO_CMO_MIN_ENT)); vio_cmo.spare += tmp; viodev->cmo.entitled -= tmp; @@ -1184,7 +1182,12 @@ EXPORT_SYMBOL(vio_unregister_driver); /* vio_dev refcount hit 0 */ static void __devinit vio_dev_release(struct device *dev) { - /* XXX should free TCE table */ + struct iommu_table *tbl = get_iommu_table_base(dev); + + /* iSeries uses a common table for all vio devices */ + if (!firmware_has_feature(FW_FEATURE_ISERIES) && tbl) + iommu_free_table(tbl, dev->of_node ? + dev->of_node->full_name : dev_name(dev)); of_node_put(dev->of_node); kfree(to_vio_dev(dev)); } @@ -1254,8 +1257,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node) if (device_register(&viodev->dev)) { printk(KERN_ERR "%s: failed to register device %s\n", __func__, dev_name(&viodev->dev)); - /* XXX free TCE table */ - kfree(viodev); + put_device(&viodev->dev); return NULL; } |