diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 61 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 9 | ||||
| -rw-r--r-- | arch/powerpc/mm/stab.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/ps3/smp.c | 2 |
5 files changed, 53 insertions, 24 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index d00131ca0835..2c42e1526d03 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -49,6 +49,9 @@ config GENERIC_HARDIRQS_NO__DO_IRQ config HAVE_SETUP_PER_CPU_AREA def_bool PPC64 +config NEED_PER_CPU_EMBED_FIRST_CHUNK + def_bool PPC64 + config IRQ_PER_CPU bool default y diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 1f6816003ebe..aa6e4500635f 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -57,6 +57,7 @@ #include <asm/cache.h> #include <asm/page.h> #include <asm/mmu.h> +#include <asm/mmu-hash64.h> #include <asm/firmware.h> #include <asm/xmon.h> #include <asm/udbg.h> @@ -569,25 +570,53 @@ void cpu_die(void) } #ifdef CONFIG_SMP -void __init setup_per_cpu_areas(void) +#define PCPU_DYN_SIZE () + +static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align) { - int i; - unsigned long size; - char *ptr; - - /* Copy section for each CPU (we discard the original) */ - size = ALIGN(__per_cpu_end - __per_cpu_start, PAGE_SIZE); -#ifdef CONFIG_MODULES - if (size < PERCPU_ENOUGH_ROOM) - size = PERCPU_ENOUGH_ROOM; -#endif + return __alloc_bootmem_node(NODE_DATA(cpu_to_node(cpu)), size, align, + __pa(MAX_DMA_ADDRESS)); +} - for_each_possible_cpu(i) { - ptr = alloc_bootmem_pages_node(NODE_DATA(cpu_to_node(i)), size); +static void __init pcpu_fc_free(void *ptr, size_t size) +{ + free_bootmem(__pa(ptr), size); +} - paca[i].data_offset = ptr - __per_cpu_start; - memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start); - } +static int pcpu_cpu_distance(unsigned int from, unsigned int to) +{ + if (cpu_to_node(from) == cpu_to_node(to)) + return LOCAL_DISTANCE; + else + return REMOTE_DISTANCE; +} + +void __init setup_per_cpu_areas(void) +{ + const size_t dyn_size = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE; + size_t atom_size; + unsigned long delta; + unsigned int cpu; + int rc; + + /* + * Linear mapping is one of 4K, 1M and 16M. For 4K, no need + * to group units. For larger mappings, use 1M atom which + * should be large enough to contain a number of units. + */ + if (mmu_linear_psize == MMU_PAGE_4K) + atom_size = PAGE_SIZE; + else + atom_size = 1 << 20; + + rc = pcpu_embed_first_chunk(0, dyn_size, atom_size, pcpu_cpu_distance, + pcpu_fc_alloc, pcpu_fc_free); + if (rc < 0) + panic("cannot initialize percpu area (err=%d)", rc); + + delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; + for_each_possible_cpu(cpu) + paca[cpu].data_offset = delta + pcpu_unit_offsets[cpu]; } #endif diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 8ef8a14abc95..244e3658983c 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -37,12 +37,6 @@ jiffies = jiffies_64 + 4; #endif SECTIONS { - /* Sections to be discarded. */ - /DISCARD/ : { - *(.exitcall.exit) - EXIT_DATA - } - . = KERNELBASE; /* @@ -298,4 +292,7 @@ SECTIONS . = ALIGN(PAGE_SIZE); _end = . ; PROVIDE32 (end = .); + + /* Sections to be discarded. */ + DISCARDS } diff --git a/arch/powerpc/mm/stab.c b/arch/powerpc/mm/stab.c index ab5fb48b3e90..687fddaa24c5 100644 --- a/arch/powerpc/mm/stab.c +++ b/arch/powerpc/mm/stab.c @@ -31,7 +31,7 @@ struct stab_entry { #define NR_STAB_CACHE_ENTRIES 8 static DEFINE_PER_CPU(long, stab_cache_ptr); -static DEFINE_PER_CPU(long, stab_cache[NR_STAB_CACHE_ENTRIES]); +static DEFINE_PER_CPU(long [NR_STAB_CACHE_ENTRIES], stab_cache); /* * Create a segment table entry for the given esid/vsid pair. diff --git a/arch/powerpc/platforms/ps3/smp.c b/arch/powerpc/platforms/ps3/smp.c index f6e04bcc70ef..51ffde40af2b 100644 --- a/arch/powerpc/platforms/ps3/smp.c +++ b/arch/powerpc/platforms/ps3/smp.c @@ -37,7 +37,7 @@ */ #define MSG_COUNT 4 -static DEFINE_PER_CPU(unsigned int, ps3_ipi_virqs[MSG_COUNT]); +static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs); static void do_message_pass(int target, int msg) { |