diff options
26 files changed, 143 insertions, 107 deletions
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 7765a800ddae..b7d066b037da 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -436,15 +436,15 @@ struct openpic; extern void kvm_cma_reserve(void) __init; static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) { - paca[cpu].kvm_hstate.xics_phys = (void __iomem *)addr; + paca_ptrs[cpu]->kvm_hstate.xics_phys = (void __iomem *)addr; } static inline void kvmppc_set_xive_tima(int cpu, unsigned long phys_addr, void __iomem *virt_addr) { - paca[cpu].kvm_hstate.xive_tima_phys = (void __iomem *)phys_addr; - paca[cpu].kvm_hstate.xive_tima_virt = virt_addr; + paca_ptrs[cpu]->kvm_hstate.xive_tima_phys = (void __iomem *)phys_addr; + paca_ptrs[cpu]->kvm_hstate.xive_tima_virt = virt_addr; } static inline u32 kvmppc_get_xics_latch(void) @@ -458,7 +458,7 @@ static inline u32 kvmppc_get_xics_latch(void) static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi) { - paca[cpu].kvm_hstate.host_ipi = host_ipi; + paca_ptrs[cpu]->kvm_hstate.host_ipi = host_ipi; } static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu) diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h index d0a2a2f99564..6e4589eee2da 100644 --- a/arch/powerpc/include/asm/lppaca.h +++ b/arch/powerpc/include/asm/lppaca.h @@ -103,7 +103,7 @@ struct lppaca { extern struct lppaca lppaca[]; -#define lppaca_of(cpu) (*paca[cpu].lppaca_ptr) +#define lppaca_of(cpu) (*paca_ptrs[cpu]->lppaca_ptr) /* * We are using a non architected field to determine if a partition is diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 6db5ab2a29a3..e89887f5e56f 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -249,10 +249,10 @@ struct paca_struct { void *rfi_flush_fallback_area; u64 l1d_flush_size; #endif -}; +} ____cacheline_aligned; extern void copy_mm_to_paca(struct mm_struct *mm); -extern struct paca_struct *paca; +extern struct paca_struct **paca_ptrs; extern void initialise_paca(struct paca_struct *new_paca, int cpu); extern void setup_paca(struct paca_struct *new_paca); extern void allocate_pacas(void); diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h index fac963e10d39..ec7b299350d9 100644 --- a/arch/powerpc/include/asm/smp.h +++ b/arch/powerpc/include/asm/smp.h @@ -170,12 +170,12 @@ static inline const struct cpumask *cpu_sibling_mask(int cpu) #ifdef CONFIG_PPC64 static inline int get_hard_smp_processor_id(int cpu) { - return paca[cpu].hw_cpu_id; + return paca_ptrs[cpu]->hw_cpu_id; } static inline void set_hard_smp_processor_id(int cpu, int phys) { - paca[cpu].hw_cpu_id = phys; + paca_ptrs[cpu]->hw_cpu_id = phys; } #else /* 32-bit */ diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c index 00b215125d3e..17c8b99680f2 100644 --- a/arch/powerpc/kernel/crash.c +++ b/arch/powerpc/kernel/crash.c @@ -238,7 +238,7 @@ static void __maybe_unused crash_kexec_wait_realmode(int cpu) if (i == cpu) continue; - while (paca[i].kexec_state < KEXEC_STATE_REAL_MODE) { + while (paca_ptrs[i]->kexec_state < KEXEC_STATE_REAL_MODE) { barrier(); if (!cpu_possible(i) || !cpu_online(i) || (msecs <= 0)) break; diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index a61151a6ea5e..6eca15f25c73 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -392,19 +392,20 @@ generic_secondary_common_init: * physical cpu id in r24, we need to search the pacas to find * which logical id maps to our physical one. */ - LOAD_REG_ADDR(r13, paca) /* Load paca pointer */ - ld r13,0(r13) /* Get base vaddr of paca array */ #ifndef CONFIG_SMP - addi r13,r13,PACA_SIZE /* know r13 if used accidentally */ b kexec_wait /* wait for next kernel if !SMP */ #else + LOAD_REG_ADDR(r8, paca_ptrs) /* Load paca_ptrs pointe */ + ld r8,0(r8) /* Get base vaddr of array */ LOAD_REG_ADDR(r7, nr_cpu_ids) /* Load nr_cpu_ids address */ lwz r7,0(r7) /* also the max paca allocated */ li r5,0 /* logical cpu id */ -1: lhz r6,PACAHWCPUID(r13) /* Load HW procid from paca */ +1: + sldi r9,r5,3 /* get paca_ptrs[] index from cpu id */ + ldx r13,r9,r8 /* r13 = paca_ptrs[cpu id] */ + lhz r6,PACAHWCPUID(r13) /* Load HW procid from paca */ cmpw r6,r24 /* Compare to our id */ beq 2f - addi r13,r13,PACA_SIZE /* Loop to next PACA on miss */ addi r5,r5,1 cmpw r5,r7 /* Check if more pacas exist */ blt 1b @@ -756,10 +757,10 @@ _GLOBAL(pmac_secondary_start) mtmsrd r3 /* RI on */ /* Set up a paca value for this processor. */ - LOAD_REG_ADDR(r4,paca) /* Load paca pointer */ - ld r4,0(r4) /* Get base vaddr of paca array */ - mulli r13,r24,PACA_SIZE /* Calculate vaddr of right paca */ - add r13,r13,r4 /* for this processor. */ + LOAD_REG_ADDR(r4,paca_ptrs) /* Load paca pointer */ + ld r4,0(r4) /* Get base vaddr of paca_ptrs array */ + sldi r5,r24,3 /* get paca_ptrs[] index from cpu id */ + ldx r13,r5,r4 /* r13 = paca_ptrs[cpu id] */ SET_PACA(r13) /* Save vaddr of paca in an SPRG*/ /* Mark interrupts soft and hard disabled (they might be enabled diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 49d34d7271e7..a250e3331f94 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -168,24 +168,25 @@ static void kexec_prepare_cpus_wait(int wait_state) * are correctly onlined. If somehow we start a CPU on boot with RTAS * start-cpu, but somehow that CPU doesn't write callin_cpu_map[] in * time, the boot CPU will timeout. If it does eventually execute - * stuff, the secondary will start up (paca[].cpu_start was written) and - * get into a peculiar state. If the platform supports - * smp_ops->take_timebase(), the secondary CPU will probably be spinning - * in there. If not (i.e. pseries), the secondary will continue on and - * try to online itself/idle/etc. If it survives that, we need to find - * these possible-but-not-online-but-should-be CPUs and chaperone them - * into kexec_smp_wait(). + * stuff, the secondary will start up (paca_ptrs[]->cpu_start was + * written) and get into a peculiar state. + * If the platform supports smp_ops->take_timebase(), the secondary CPU + * will probably be spinning in there. If not (i.e. pseries), the + * secondary will continue on and try to online itself/idle/etc. If it + * survives that, we need to find these + * possible-but-not-online-but-should-be CPUs and chaperone them into + * kexec_smp_wait(). */ for_each_online_cpu(i) { if (i == my_cpu) continue; - while (paca[i].kexec_state < wait_state) { + while (paca_ptrs[i]->kexec_state < wait_state) { barrier(); if (i != notified) { printk(KERN_INFO "kexec: waiting for cpu %d " "(physical %d) to enter %i state\n", - i, paca[i].hw_cpu_id, wait_state); + i, paca_ptrs[i]->hw_cpu_id, wait_state); notified = i; } } @@ -327,8 +328,7 @@ void default_machine_kexec(struct kimage *image) */ memcpy(&kexec_paca, get_paca(), sizeof(struct paca_struct)); kexec_paca.data_offset = 0xedeaddeadeeeeeeeUL; - paca = (struct paca_struct *)RELOC_HIDE(&kexec_paca, 0) - - kexec_paca.paca_index; + paca_ptrs[kexec_paca.paca_index] = &kexec_paca; setup_paca(&kexec_paca); /* XXX: If anyone does 'dynamic lppacas' this will also need to be diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 5900540e2ff8..eef4891c9af6 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -161,8 +161,8 @@ static void __init allocate_slb_shadows(int nr_cpus, int limit) { } * processors. The processor VPD array needs one entry per physical * processor (not thread). */ -struct paca_struct *paca; -EXPORT_SYMBOL(paca); +struct paca_struct **paca_ptrs __read_mostly; +EXPORT_SYMBOL(paca_ptrs); void __init initialise_paca(struct paca_struct *new_paca, int cpu) { @@ -213,11 +213,13 @@ void setup_paca(struct paca_struct *new_paca) } -static int __initdata paca_size; +static int __initdata paca_nr_cpu_ids; +static int __initdata paca_ptrs_size; void __init allocate_pacas(void) { u64 limit; + unsigned long size = 0; int cpu; #ifdef CONFIG_PPC_BOOK3S_64 @@ -230,13 +232,27 @@ void __init allocate_pacas(void) limit = ppc64_rma_size; #endif - paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids); + paca_nr_cpu_ids = nr_cpu_ids; - paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit)); - memset(paca, 0, paca_size); + paca_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids; + paca_ptrs = __va(memblock_alloc_base(paca_ptrs_size, 0, limit)); + memset(paca_ptrs, 0, paca_ptrs_size); - printk(KERN_DEBUG "Allocated %u bytes for %u pacas at %p\n", - paca_size, nr_cpu_ids, paca); + size += paca_ptrs_size; + + for (cpu = 0; cpu < nr_cpu_ids; cpu++) { + unsigned long pa; + + pa = memblock_alloc_base(sizeof(struct paca_struct), + L1_CACHE_BYTES, limit); + paca_ptrs[cpu] = __va(pa); + memset(paca_ptrs[cpu], 0, sizeof(struct paca_struct)); + + size += sizeof(struct paca_struct); + } + + printk(KERN_DEBUG "Allocated %lu bytes for %u pacas\n", + size, nr_cpu_ids); allocate_lppacas(nr_cpu_ids, limit); @@ -244,26 +260,38 @@ void __init allocate_pacas(void) /* Can't use for_each_*_cpu, as they aren't functional yet */ for (cpu = 0; cpu < nr_cpu_ids; cpu++) - initialise_paca(&paca[cpu], cpu); + initialise_paca(paca_ptrs[cpu], cpu); } void __init free_unused_pacas(void) { - int new_size; - - new_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids); - - if (new_size >= paca_size) - return; - - memblock_free(__pa(paca) + new_size, paca_size - new_size); - - printk(KERN_DEBUG "Freed %u bytes for unused pacas\n", - paca_size - new_size); + unsigned long size = 0; + int new_ptrs_size; + int cpu; - paca_size = new_size; + for (cpu = 0; cpu < paca_nr_cpu_ids; cpu++) { + if (!cpu_possible(cpu)) { + unsigned long pa = __pa(paca_ptrs[cpu]); + memblock_free(pa, sizeof(struct paca_struct)); + paca_ptrs[cpu] = NULL; + size += sizeof(struct paca_struct); + } + } + + new_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids; + if (new_ptrs_size < paca_ptrs_size) { + memblock_free(__pa(paca_ptrs) + new_ptrs_size, + paca_ptrs_size - new_ptrs_size); + size += paca_ptrs_size - new_ptrs_size; + } + + if (size) + printk(KERN_DEBUG "Freed %lu bytes for unused pacas\n", size); free_lppacas(); + + paca_nr_cpu_ids = nr_cpu_ids; + paca_ptrs_size = new_ptrs_size; } void copy_mm_to_paca(struct mm_struct *mm) diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index c388cc3357fa..3ce12af4906f 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -110,7 +110,7 @@ void __init setup_tlb_core_data(void) if (cpu_first_thread_sibling(boot_cpuid) == first) first = boot_cpuid; - paca[cpu].tcd_ptr = &paca[first].tcd; + paca_ptrs[cpu]->tcd_ptr = &paca_ptrs[first]->tcd; /* * If we have threads, we need either tlbsrx. @@ -304,7 +304,7 @@ void __init early_setup(unsigned long dt_ptr) early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ - setup_paca(&paca[boot_cpuid]); + setup_paca(paca_ptrs[boot_cpuid]); fixup_boot_paca(); /* @@ -628,15 +628,15 @@ void __init exc_lvl_early_init(void) for_each_possible_cpu(i) { sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); critirq_ctx[i] = (struct thread_info *)__va(sp); - paca[i].crit_kstack = __va(sp + THREAD_SIZE); + paca_ptrs[i]->crit_kstack = __va(sp + THREAD_SIZE); sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); dbgirq_ctx[i] = (struct thread_info *)__va(sp); - paca[i].dbg_kstack = __va(sp + THREAD_SIZE); + paca_ptrs[i]->dbg_kstack = __va(sp + THREAD_SIZE); sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); mcheckirq_ctx[i] = (struct thread_info *)__va(sp); - paca[i].mc_kstack = __va(sp + THREAD_SIZE); + paca_ptrs[i]->mc_kstack = __va(sp + THREAD_SIZE); } if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) @@ -693,20 +693,20 @@ void __init emergency_stack_init(void) ti = __va(memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit)); memset(ti, 0, THREAD_SIZE); emerg_stack_init_thread_info(ti, i); - paca[i].emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->emergency_sp = (void *)ti + THREAD_SIZE; #ifdef CONFIG_PPC_BOOK3S_64 /* emergency stack for NMI exception handling. */ ti = __va(memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit)); memset(ti, 0, THREAD_SIZE); emerg_stack_init_thread_info(ti, i); - paca[i].nmi_emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->nmi_emergency_sp = (void *)ti + THREAD_SIZE; /* emergency stack for machine check exception handling. */ ti = __va(memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit)); memset(ti, 0, THREAD_SIZE); emerg_stack_init_thread_info(ti, i); - paca[i].mc_emergency_sp = (void *)ti + THREAD_SIZE; + paca_ptrs[i]->mc_emergency_sp = (void *)ti + THREAD_SIZE; #endif } } @@ -762,7 +762,7 @@ void __init setup_per_cpu_areas(void) delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; for_each_possible_cpu(cpu) { __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; - paca[cpu].data_offset = __per_cpu_offset[cpu]; + paca_ptrs[cpu]->data_offset = __per_cpu_offset[cpu]; } } #endif @@ -875,8 +875,9 @@ static void init_fallback_flush(void) memset(l1d_flush_fallback_area, 0, l1d_size * 2); for_each_possible_cpu(cpu) { - paca[cpu].rfi_flush_fallback_area = l1d_flush_fallback_area; - paca[cpu].l1d_flush_size = l1d_size; + struct paca_struct *paca = paca_ptrs[cpu]; + paca->rfi_flush_fallback_area = l1d_flush_fallback_area; + paca->l1d_flush_size = l1d_size; } } diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index bbe7634b3a43..cfc08b099c49 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -123,8 +123,8 @@ int smp_generic_kick_cpu(int nr) * cpu_start field to become non-zero After we set cpu_start, * the processor will continue on to secondary_start */ - if (!paca[nr].cpu_start) { - paca[nr].cpu_start = 1; + if (!paca_ptrs[nr]->cpu_start) { + paca_ptrs[nr]->cpu_start = 1; smp_mb(); return 0; } @@ -657,7 +657,7 @@ void smp_prepare_boot_cpu(void) { BUG_ON(smp_processor_id() != boot_cpuid); #ifdef CONFIG_PPC64 - paca[boot_cpuid].__current = current; + paca_ptrs[boot_cpuid]->__current = current; #endif set_numa_node(numa_cpu_lookup_table[boot_cpuid]); current_set[boot_cpuid] = task_thread_info(current); @@ -748,8 +748,8 @@ static void cpu_idle_thread_init(unsigned int cpu, struct task_struct *idle) struct thread_info *ti = task_thread_info(idle); #ifdef CONFIG_PPC64 - paca[cpu].__current = idle; - paca[cpu].kstack = (unsigned long)ti + THREAD_SIZE - STACK_FRAME_OVERHEAD; + paca_ptrs[cpu]->__current = idle; + paca_ptrs[cpu]->kstack = (unsigned long)ti + THREAD_SIZE - STACK_FRAME_OVERHEAD; #endif ti->cpu = cpu; secondary_ti = current_set[cpu] = ti; diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 5a8bfee6e187..1f9d94dac3a6 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c @@ -600,7 +600,7 @@ void __init record_spr_defaults(void) if (cpu_has_feature(CPU_FTR_DSCR)) { dscr_default = mfspr(SPRN_DSCR); for (cpu = 0; cpu < nr_cpu_ids; cpu++) - paca[cpu].dscr_default = dscr_default; + paca_ptrs[cpu]->dscr_default = dscr_default; } } #endif /* CONFIG_PPC64 */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 89707354c2ef..41fce69714d5 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -170,7 +170,7 @@ static bool kvmppc_ipi_thread(int cpu) #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) if (cpu >= 0 && cpu < nr_cpu_ids) { - if (paca[cpu].kvm_hstate.xics_phys) { + if (paca_ptrs[cpu]->kvm_hstate.xics_phys) { xics_wake_cpu(cpu); return true; } @@ -2140,7 +2140,7 @@ static int kvmppc_grab_hwthread(int cpu) struct paca_struct *tpaca; long timeout = 10000; - tpaca = &paca[cpu]; + tpaca = paca_ptrs[cpu]; /* Ensure the thread won't go into the kernel if it wakes */ tpaca->kvm_hstate.kvm_vcpu = NULL; @@ -2173,7 +2173,7 @@ static void kvmppc_release_hwthread(int cpu) { struct paca_struct *tpaca; - tpaca = &paca[cpu]; + tpaca = paca_ptrs[cpu]; tpaca->kvm_hstate.hwthread_req = 0; tpaca->kvm_hstate.kvm_vcpu = NULL; tpaca->kvm_hstate.kvm_vcore = NULL; @@ -2239,7 +2239,7 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) vcpu->arch.thread_cpu = cpu; cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest); } - tpaca = &paca[cpu]; + tpaca = paca_ptrs[cpu]; tpaca->kvm_hstate.kvm_vcpu = vcpu; tpaca->kvm_hstate.ptid = cpu - vc->pcpu; /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ @@ -2264,7 +2264,7 @@ static void kvmppc_wait_for_nap(int n_threads) * for any threads that still have a non-NULL vcore ptr. */ for (i = 1; i < n_threads; ++i) - if (paca[cpu + i].kvm_hstate.kvm_vcore) + if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) break; if (i == n_threads) { HMT_medium(); @@ -2274,7 +2274,7 @@ static void kvmppc_wait_for_nap(int n_threads) } HMT_medium(); for (i = 1; i < n_threads; ++i) - if (paca[cpu + i].kvm_hstate.kvm_vcore) + if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); } @@ -2806,9 +2806,11 @@ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) } for (thr = 0; thr < controlled_threads; ++thr) { - paca[pcpu + thr].kvm_hstate.tid = thr; - paca[pcpu + thr].kvm_hstate.napping = 0; - paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip; + struct paca_struct *paca = paca_ptrs[pcpu + thr]; + + paca->kvm_hstate.tid = thr; + paca->kvm_hstate.napping = 0; + paca->kvm_hstate.kvm_split_mode = sip; } /* Initiate micro-threading (split-core) on POWER8 if required */ @@ -2925,7 +2927,9 @@ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) } else if (hpt_on_radix) { /* Wait for all threads to have seen final sync */ for (thr = 1; thr < controlled_threads; ++thr) { - while (paca[pcpu + thr].kvm_hstate.kvm_split_mode) { + struct paca_struct *paca = paca_ptrs[pcpu + thr]; + + while (paca->kvm_hstate.kvm_split_mode) { HMT_low(); barrier(); } @@ -4387,7 +4391,7 @@ static int kvm_init_subcore_bitmap(void) int node = cpu_to_node(first_cpu); /* Ignore if it is already allocated. */ - if (paca[first_cpu].sibling_subcore_state) + if (paca_ptrs[first_cpu]->sibling_subcore_state) continue; sibling_subcore_state = @@ -4402,7 +4406,8 @@ static int kvm_init_subcore_bitmap(void) for (j = 0; j < threads_per_core; j++) { int cpu = first_cpu + j; - paca[cpu].sibling_subcore_state = sibling_subcore_state; + paca_ptrs[cpu]->sibling_subcore_state = + sibling_subcore_state; } } return 0; @@ -4429,7 +4434,7 @@ static int kvmppc_book3s_init_hv(void) /* * We need a way of accessing the XICS interrupt controller, - * either directly, via paca[cpu].kvm_hstate.xics_phys, or + * either directly, via paca_ptrs[cpu]->kvm_hstate.xics_phys, or * indirectly, via OPAL. */ #ifdef CONFIG_SMP diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index 49a2c7825e04..de18299f92b7 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -251,7 +251,7 @@ void kvmhv_rm_send_ipi(int cpu) return; /* Else poke the target with an IPI */ - xics_phys = paca[cpu].kvm_hstate.xics_phys; + xics_phys = paca_ptrs[cpu]->kvm_hstate.xics_phys; if (xics_phys) __raw_rm_writeb(IPI_PRIORITY, xics_phys + XICS_MFRR); else diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c index 71d1b19ad1c0..e6016f4466f3 100644 --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c @@ -723,7 +723,7 @@ extern void radix_kvm_prefetch_workaround(struct mm_struct *mm) for (; sib <= cpu_last_thread_sibling(cpu) && !flush; sib++) { if (sib == cpu) continue; - if (paca[sib].kvm_hstate.kvm_vcpu) + if (paca_ptrs[sib]->kvm_hstate.kvm_vcpu) flush = true; } if (flush) diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c index f51fd35f4618..7e966f4cf19a 100644 --- a/arch/powerpc/platforms/85xx/smp.c +++ b/arch/powerpc/platforms/85xx/smp.c @@ -147,7 +147,7 @@ static void qoriq_cpu_kill(unsigned int cpu) for (i = 0; i < 500; i++) { if (is_cpu_dead(cpu)) { #ifdef CONFIG_PPC64 - paca[cpu].cpu_start = 0; + paca_ptrs[cpu]->cpu_start = 0; #endif return; } @@ -328,7 +328,7 @@ static int smp_85xx_kick_cpu(int nr) return ret; done: - paca[nr].cpu_start = 1; + paca_ptrs[nr]->cpu_start = 1; generic_set_cpu_up(nr); return ret; @@ -409,14 +409,14 @@ void mpc85xx_smp_kexec_cpu_down(int crash_shutdown, int secondary) } if (disable_threadbit) { - while (paca[disable_cpu].kexec_state < KEXEC_STATE_REAL_MODE) { + while (paca_ptrs[disable_cpu]->kexec_state < KEXEC_STATE_REAL_MODE) { barrier(); now = mftb(); if (!notified && now - start > 1000000) { pr_info("%s/%d: waiting for cpu %d to enter KEXEC_STATE_REAL_MODE (%d)\n", __func__, smp_processor_id(), disable_cpu, - paca[disable_cpu].kexec_state); + paca_ptrs[disable_cpu]->kexec_state); notified = true; } } diff --git a/arch/powerpc/platforms/cell/smp.c b/arch/powerpc/platforms/cell/smp.c index f84d52a2db40..1aeac5761e0b 100644 --- a/arch/powerpc/platforms/cell/smp.c +++ b/arch/powerpc/platforms/cell/smp.c @@ -83,7 +83,7 @@ static inline int smp_startup_cpu(unsigned int lcpu) pcpu = get_hard_smp_processor_id(lcpu); /* Fixup atomic count: it exited inside IRQ handler. */ - task_thread_info(paca[lcpu].__current)->preempt_count = 0; + task_thread_info(paca_ptrs[lcpu]->__current)->preempt_count = 0; /* * If the RTAS start-cpu token does not exist then presume the @@ -126,7 +126,7 @@ static int smp_cell_kick_cpu(int nr) * cpu_start field to become non-zero After we set cpu_start, * the processor will continue on to secondary_start */ - paca[nr].cpu_start = 1; + paca_ptrs[nr]->cpu_start = 1; return 0; } diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c index 443d5ca71995..5b2ca71ee551 100644 --- a/arch/powerpc/platforms/powernv/idle.c +++ b/arch/powerpc/platforms/powernv/idle.c @@ -80,7 +80,7 @@ static int pnv_save_sprs_for_deep_states(void) for_each_possible_cpu(cpu) { uint64_t pir = get_hard_smp_processor_id(cpu); - uint64_t hsprg0_val = (uint64_t)&paca[cpu]; + uint64_t hsprg0_val = (uint64_t)paca_ptrs[cpu]; rc = opal_slw_set_reg(pir, SPRN_HSPRG0, hsprg0_val); if (rc != 0) @@ -173,12 +173,12 @@ static void pnv_alloc_idle_core_states(void) for (j = 0; j < threads_per_core; j++) { int cpu = first_cpu + j; - paca[cpu].core_idle_state_ptr = core_idle_state; - paca[cpu].thread_idle_state = PNV_THREAD_RUNNING; - paca[cpu].thread_mask = 1 << j; + paca_ptrs[cpu]->core_idle_state_ptr = core_idle_state; + paca_ptrs[cpu]->thread_idle_state = PNV_THREAD_RUNNING; + paca_ptrs[cpu]->thread_mask = 1 << j; if (!cpu_has_feature(CPU_FTR_POWER9_DD1)) continue; - paca[cpu].thread_sibling_pacas = + paca_ptrs[cpu]->thread_sibling_pacas = kmalloc_node(paca_ptr_array_size, GFP_KERNEL, node); } @@ -749,7 +749,8 @@ static int __init pnv_init_idle_states(void) for (i = 0; i < threads_per_core; i++) { int j = base_cpu + i; - paca[j].thread_sibling_pacas[idx] = &paca[cpu]; + paca_ptrs[j]->thread_sibling_pacas[idx] = + paca_ptrs[cpu]; } } } diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 4fb21e17504a..b62ca0220ea5 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -254,7 +254,7 @@ static void pnv_kexec_wait_secondaries_down(void) if (i != notified) { printk(KERN_INFO "kexec: waiting for cpu %d " "(physical %d) to enter OPAL\n", - i, paca[i].hw_cpu_id); + i, paca_ptrs[i]->hw_cpu_id); notified = i; } @@ -266,7 +266,7 @@ static void pnv_kexec_wait_secondaries_down(void) if (timeout-- == 0) { printk(KERN_ERR "kexec: timed out waiting for " "cpu %d (physical %d) to enter OPAL\n", - i, paca[i].hw_cpu_id); + i, paca_ptrs[i]->hw_cpu_id); break; } } diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c index 9664c8461f03..19af6de6b6f0 100644 --- a/arch/powerpc/platforms/powernv/smp.c +++ b/arch/powerpc/platforms/powernv/smp.c @@ -80,7 +80,7 @@ static int pnv_smp_kick_cpu(int nr) * If we already started or OPAL is not supported, we just * kick the CPU via the PACA */ - if (paca[nr].cpu_start || !firmware_has_feature(FW_FEATURE_OPAL)) + if (paca_ptrs[nr]->cpu_start || !firmware_has_feature(FW_FEATURE_OPAL)) goto kick; /* diff --git a/arch/powerpc/platforms/powernv/subcore.c b/arch/powerpc/platforms/powernv/subcore.c index 596ae2e98040..45563004feda 100644 --- a/arch/powerpc/platforms/powernv/subcore.c +++ b/arch/powerpc/platforms/powernv/subcore.c @@ -280,7 +280,7 @@ void update_subcore_sibling_mask(void) int offset = (tid / threads_per_subcore) * threads_per_subcore; int mask = sibling_mask_first_cpu << offset; - paca[cpu].subcore_sibling_mask = mask; + paca_ptrs[cpu]->subcore_sibling_mask = mask; } } diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c index dceb51454d8d..357471aa99a6 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -233,7 +233,7 @@ static void pseries_cpu_die(unsigned int cpu) * done here. Change isolate state to Isolate and * change allocation-state to Unusable. */ - paca[cpu].cpu_start = 0; + paca_ptrs[cpu]->cpu_start = 0; } /* diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 0ee4a469a4ae..b6d2ecce33eb 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -99,7 +99,7 @@ void vpa_init(int cpu) * reports that. All SPLPAR support SLB shadow buffer. */ if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) { - addr = __pa(paca[cpu].slb_shadow_ptr); + addr = __pa(paca_ptrs[cpu]->slb_shadow_ptr); ret = register_slb_shadow(hwcpu, addr); if (ret) pr_err("WARNING: SLB shadow buffer registration for " @@ -111,7 +111,7 @@ void vpa_init(int cpu) /* * Register dispatch trace log, if one has been allocated. */ - pp = &paca[cpu]; + pp = paca_ptrs[cpu]; dtl = pp->dispatch_log; if (dtl) { pp->dtl_ridx = 0; diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 372d7ada1a0c..a66005a25c55 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -246,7 +246,7 @@ static int alloc_dispatch_logs(void) return 0; for_each_possible_cpu(cpu) { - pp = &paca[cpu]; + pp = paca_ptrs[cpu]; dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); if (!dtl) { pr_warn("Failed to allocate dispatch trace log for cpu %d\n", diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index 2e184829e5d4..d506bf661f0f 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -110,7 +110,7 @@ static inline int smp_startup_cpu(unsigned int lcpu) } /* Fixup atomic count: it exited inside IRQ handler. */ - task_thread_info(paca[lcpu].__current)->preempt_count = 0; + task_thread_info(paca_ptrs[lcpu]->__current)->preempt_count = 0; #ifdef CONFIG_HOTPLUG_CPU if (get_cpu_current_state(lcpu) == CPU_STATE_INACTIVE) goto out; @@ -165,7 +165,7 @@ static int smp_pSeries_kick_cpu(int nr) * cpu_start field to become non-zero After we set cpu_start, * the processor will continue on to secondary_start */ - paca[nr].cpu_start = 1; + paca_ptrs[nr]->cpu_start = 1; #ifdef CONFIG_HOTPLUG_CPU set_preferred_offline_state(nr, CPU_STATE_ONLINE); diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c index 1459f4e8b698..37bfbc54aacb 100644 --- a/arch/powerpc/sysdev/xics/icp-native.c +++ b/arch/powerpc/sysdev/xics/icp-native.c @@ -164,7 +164,7 @@ void icp_native_cause_ipi_rm(int cpu) * Just like the cause_ipi functions, it is required to * include a full barrier before causing the IPI. */ - xics_phys = paca[cpu].kvm_hstate.xics_phys; + xics_phys = paca_ptrs[cpu]->kvm_hstate.xics_phys; mb(); __raw_rm_writeb(IPI_PRIORITY, xics_phys + XICS_MFRR); } diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 82e1a3ee6e0f..b6574b6f7d4a 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -2327,7 +2327,7 @@ static void dump_one_paca(int cpu) catch_memory_errors = 1; sync(); - p = &paca[cpu]; + p = paca_ptrs[cpu]; printf("paca for cpu 0x%x @ %px:\n", cpu, p); |