diff options
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 47a973b5b4f1..286bcee800f4 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -51,6 +51,7 @@ #include <asm/os_info.h> #include <asm/sigp.h> #include <asm/idle.h> +#include <asm/nmi.h> #include "entry.h" enum { @@ -78,6 +79,8 @@ struct pcpu { static u8 boot_core_type; static struct pcpu pcpu_devices[NR_CPUS]; +static struct kmem_cache *pcpu_mcesa_cache; + unsigned int smp_cpu_mt_shift; EXPORT_SYMBOL(smp_cpu_mt_shift); @@ -188,8 +191,10 @@ static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit) static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) { unsigned long async_stack, panic_stack; + unsigned long mcesa_origin, mcesa_bits; struct lowcore *lc; + mcesa_origin = mcesa_bits = 0; if (pcpu != &pcpu_devices[0]) { pcpu->lowcore = (struct lowcore *) __get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER); @@ -197,20 +202,27 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) panic_stack = __get_free_page(GFP_KERNEL); if (!pcpu->lowcore || !panic_stack || !async_stack) goto out; + if (MACHINE_HAS_VX || MACHINE_HAS_GS) { + mcesa_origin = (unsigned long) + kmem_cache_alloc(pcpu_mcesa_cache, GFP_KERNEL); + if (!mcesa_origin) + goto out; + mcesa_bits = MACHINE_HAS_GS ? 11 : 0; + } } else { async_stack = pcpu->lowcore->async_stack - ASYNC_FRAME_OFFSET; panic_stack = pcpu->lowcore->panic_stack - PANIC_FRAME_OFFSET; + mcesa_origin = pcpu->lowcore->mcesad & MCESA_ORIGIN_MASK; + mcesa_bits = pcpu->lowcore->mcesad & MCESA_LC_MASK; } lc = pcpu->lowcore; memcpy(lc, &S390_lowcore, 512); memset((char *) lc + 512, 0, sizeof(*lc) - 512); lc->async_stack = async_stack + ASYNC_FRAME_OFFSET; lc->panic_stack = panic_stack + PANIC_FRAME_OFFSET; + lc->mcesad = mcesa_origin | mcesa_bits; lc->cpu_nr = cpu; lc->spinlock_lockval = arch_spin_lockval(cpu); - if (MACHINE_HAS_VX) - lc->vector_save_area_addr = - (unsigned long) &lc->vector_save_area; if (vdso_alloc_per_cpu(lc)) goto out; lowcore_ptr[cpu] = lc; @@ -218,6 +230,9 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) return 0; out: if (pcpu != &pcpu_devices[0]) { + if (mcesa_origin) + kmem_cache_free(pcpu_mcesa_cache, + (void *) mcesa_origin); free_page(panic_stack); free_pages(async_stack, ASYNC_ORDER); free_pages((unsigned long) pcpu->lowcore, LC_ORDER); @@ -229,11 +244,17 @@ out: static void pcpu_free_lowcore(struct pcpu *pcpu) { + unsigned long mcesa_origin; + pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0); lowcore_ptr[pcpu - pcpu_devices] = NULL; vdso_free_per_cpu(pcpu->lowcore); if (pcpu == &pcpu_devices[0]) return; + if (MACHINE_HAS_VX || MACHINE_HAS_GS) { + mcesa_origin = pcpu->lowcore->mcesad & MCESA_ORIGIN_MASK; + kmem_cache_free(pcpu_mcesa_cache, (void *) mcesa_origin); + } free_page(pcpu->lowcore->panic_stack-PANIC_FRAME_OFFSET); free_pages(pcpu->lowcore->async_stack-ASYNC_FRAME_OFFSET, ASYNC_ORDER); free_pages((unsigned long) pcpu->lowcore, LC_ORDER); @@ -550,9 +571,11 @@ int smp_store_status(int cpu) if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_STATUS_AT_ADDRESS, pa) != SIGP_CC_ORDER_CODE_ACCEPTED) return -EIO; - if (!MACHINE_HAS_VX) + if (!MACHINE_HAS_VX && !MACHINE_HAS_GS) return 0; - pa = __pa(pcpu->lowcore->vector_save_area_addr); + pa = __pa(pcpu->lowcore->mcesad & MCESA_ORIGIN_MASK); + if (MACHINE_HAS_GS) + pa |= pcpu->lowcore->mcesad & MCESA_LC_MASK; if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS, pa) != SIGP_CC_ORDER_CODE_ACCEPTED) return -EIO; @@ -897,12 +920,22 @@ void __init smp_fill_possible_mask(void) void __init smp_prepare_cpus(unsigned int max_cpus) { + unsigned long size; + /* request the 0x1201 emergency signal external interrupt */ if (register_external_irq(EXT_IRQ_EMERGENCY_SIG, do_ext_call_interrupt)) panic("Couldn't request external interrupt 0x1201"); /* request the 0x1202 external call external interrupt */ if (register_external_irq(EXT_IRQ_EXTERNAL_CALL, do_ext_call_interrupt)) panic("Couldn't request external interrupt 0x1202"); + /* create slab cache for the machine-check-extended-save-areas */ + if (MACHINE_HAS_VX || MACHINE_HAS_GS) { + size = 1UL << (MACHINE_HAS_GS ? 11 : 10); + pcpu_mcesa_cache = kmem_cache_create("nmi_save_areas", + size, size, 0, NULL); + if (!pcpu_mcesa_cache) + panic("Couldn't create nmi save area cache"); + } } void __init smp_prepare_boot_cpu(void) |