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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-05-17 10:00:00 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-05-17 10:00:15 +0200
commit94038a99119c171aea27608f81c7ba359de98c4e (patch)
treef74a84b289eb256f2b0674efb49640733b003b29 /arch/s390/kernel
parente40152ee1e1c7a63f4777791863215e3faa37a86 (diff)
[S390] More cleanup for struct _lowcore
Remove cpu_id from lowcore and replace addr_t with __u64. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/asm-offsets.c1
-rw-r--r--arch/s390/kernel/head.S4
-rw-r--r--arch/s390/kernel/processor.c37
-rw-r--r--arch/s390/kernel/setup.c20
4 files changed, 29 insertions, 33 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index a09408952ed0..32b1ede69858 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -126,7 +126,6 @@ int main(void)
DEFINE(__LC_KERNEL_ASCE, offsetof(struct _lowcore, kernel_asce));
DEFINE(__LC_USER_ASCE, offsetof(struct _lowcore, user_asce));
DEFINE(__LC_USER_EXEC_ASCE, offsetof(struct _lowcore, user_exec_asce));
- DEFINE(__LC_CPUID, offsetof(struct _lowcore, cpu_id));
DEFINE(__LC_INT_CLOCK, offsetof(struct _lowcore, int_clock));
DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func));
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 9d1f76702d47..51838ad42d56 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -328,8 +328,8 @@ iplstart:
#
# reset files in VM reader
#
- stidp __LC_CPUID # store cpuid
- tm __LC_CPUID,0xff # running VM ?
+ stidp __LC_SAVE_AREA # store cpuid
+ tm __LC_SAVE_AREA,0xff # running VM ?
bno .Lnoreset
la %r2,.Lreset
lhi %r3,26
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 0729f36c2fe3..ecb2d02b02e4 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -18,24 +18,42 @@
#include <asm/lowcore.h>
#include <asm/param.h>
+static DEFINE_PER_CPU(struct cpuid, cpu_id);
+
+/*
+ * cpu_init - initializes state that is per-CPU.
+ */
+void __cpuinit cpu_init(void)
+{
+ struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
+ get_cpu_id(id);
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+ BUG_ON(current->mm);
+ enter_lazy_tlb(&init_mm, current);
+}
+
+/*
+ * print_cpu_info - print basic information about a cpu
+ */
void __cpuinit print_cpu_info(void)
{
+ struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
pr_info("Processor %d started, address %d, identification %06X\n",
- S390_lowcore.cpu_nr, S390_lowcore.cpu_addr,
- S390_lowcore.cpu_id.ident);
+ S390_lowcore.cpu_nr, S390_lowcore.cpu_addr, id->ident);
}
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
-
static int show_cpuinfo(struct seq_file *m, void *v)
{
static const char *hwcap_str[10] = {
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
"edat", "etf3eh", "highgprs"
};
- struct _lowcore *lc;
unsigned long n = (unsigned long) v - 1;
int i;
@@ -55,19 +73,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
}
if (cpu_online(n)) {
-#ifdef CONFIG_SMP
- lc = (smp_processor_id() == n) ?
- &S390_lowcore : lowcore_ptr[n];
-#else
- lc = &S390_lowcore;
-#endif
+ struct cpuid *id = &per_cpu(cpu_id, n);
seq_printf(m, "processor %li: "
"version = %02X, "
"identification = %06X, "
"machine = %04X\n",
- n, lc->cpu_id.version,
- lc->cpu_id.ident,
- lc->cpu_id.machine);
+ n, id->version, id->ident, id->machine);
}
preempt_enable();
return 0;
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 91625f759ccd..6309276516b9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -113,22 +113,6 @@ static struct resource data_resource = {
};
/*
- * cpu_init() initializes state that is per-CPU.
- */
-void __cpuinit cpu_init(void)
-{
- /*
- * Store processor id in lowcore (used e.g. in timer_interrupt)
- */
- get_cpu_id(&S390_lowcore.cpu_id);
-
- atomic_inc(&init_mm.mm_count);
- current->active_mm = &init_mm;
- BUG_ON(current->mm);
- enter_lazy_tlb(&init_mm, current);
-}
-
-/*
* condev= and conmode= setup parameter.
*/
@@ -695,6 +679,7 @@ static void __init setup_hwcaps(void)
static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
unsigned long long facility_list_extended;
unsigned int facility_list;
+ struct cpuid cpu_id;
int i;
facility_list = stfl();
@@ -756,7 +741,8 @@ static void __init setup_hwcaps(void)
*/
elf_hwcap |= HWCAP_S390_HIGH_GPRS;
- switch (S390_lowcore.cpu_id.machine) {
+ get_cpu_id(&cpu_id);
+ switch (cpu_id.machine) {
case 0x9672:
#if !defined(CONFIG_64BIT)
default: /* Use "g5" as default for 31 bit kernels. */