diff options
| author |   Andi Kleen <ak@suse.de> | 2006-12-07 02:14:05 +0100 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:05 +0100 |
| commit | 770d132f03ac15b12919f1bac481f4beda13e094 (patch) | |
| tree | fdf8470cd380f2db1960102c928806f687f72938 /arch/i386 | |
| parent | [PATCH] x86-64: Speed and clean up cache flushing in change_page_attr (diff) | |
| download | linux-dev-770d132f03ac15b12919f1bac481f4beda13e094.tar.xz linux-dev-770d132f03ac15b12919f1bac481f4beda13e094.zip | |
[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>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/cpu/common.c | 3 | ||||
| -rw-r--r-- | arch/i386/kernel/cpu/proc.c | 3 |
2 files changed, 5 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; } |