summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2006-12-07 02:14:05 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:05 +0100
commit770d132f03ac15b12919f1bac481f4beda13e094 (patch)
treefdf8470cd380f2db1960102c928806f687f72938
parentea7322decb974a4a3e804f96a0201e893ff88ce3 (diff)
[PATCH] i386: Retrieve CLFLUSH size from CPUID
Also report it in /proc/cpuinfo similar to x86-64. Needed for followon patch Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/i386/kernel/cpu/common.c3
-rw-r--r--arch/i386/kernel/cpu/proc.c3
-rw-r--r--include/asm-i386/processor.h1
3 files changed, 6 insertions, 1 deletions
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 6958ae5e2fa5..cda41aef79ad 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -309,6 +309,8 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
#else
c->apicid = (ebx >> 24) & 0xFF;
#endif
+ if (c->x86_capability[0] & (1<<19))
+ c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
} else {
/* Have CPUID level 0 only - unheard of */
c->x86 = 4;
@@ -373,6 +375,7 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
c->x86_vendor_id[0] = '\0'; /* Unset */
c->x86_model_id[0] = '\0'; /* Unset */
c->x86_max_cores = 1;
+ c->x86_clflush_size = 32;
memset(&c->x86_capability, 0, sizeof c->x86_capability);
if (!have_cpuid_p()) {
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 76aac088a323..6624d8583c42 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -152,9 +152,10 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, " [%d]", i);
}
- seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
+ seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
c->loops_per_jiffy/(500000/HZ),
(c->loops_per_jiffy/(5000/HZ)) % 100);
+ seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
return 0;
}
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index f73cf836e649..98fa73b71760 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -72,6 +72,7 @@ struct cpuinfo_x86 {
#endif
unsigned char x86_max_cores; /* cpuid returned max cores value */
unsigned char apicid;
+ unsigned short x86_clflush_size;
#ifdef CONFIG_SMP
unsigned char booted_cores; /* number of cores as seen by OS */
__u8 phys_proc_id; /* Physical processor id. */