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Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c43
1 files changed, 38 insertions, 5 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 5dab859b0d54..363000a77ffc 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)