diff options
| author | Borislav Petkov <borislav.petkov@amd.com> | 2010-01-22 16:01:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-26 07:41:27 -0700 |
| commit | 2444b629ee518745f54c2f7cf9e4de3d48e834cb (patch) | |
| tree | 0aec94ee12bcfa0d6898bd94b2f1ccafaab69bfe /arch/x86/lib/cache-smp.c | |
| parent | b98388e5a6d1887a3c96f9543fe79732dd1fc030 (diff) | |
x86, lib: Add wbinvd smp helpers
commit a7b480e7f30b3813353ec009f10f2ac7a6669f3b upstream.
Add wbinvd_on_cpu and wbinvd_on_all_cpus stubs for executing wbinvd on a
particular CPU.
[ hpa: renamed lib/smp.c to lib/cache-smp.c ]
[ hpa: wbinvd_on_all_cpus() returns int, but wbinvd() returns
void. Thus, the former cannot be a macro for the latter,
replace with an inline function. ]
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1264172467-25155-2-git-send-email-bp@amd64.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/x86/lib/cache-smp.c')
| -rw-r--r-- | arch/x86/lib/cache-smp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c new file mode 100644 index 000000000000..a3c668875038 --- /dev/null +++ b/arch/x86/lib/cache-smp.c @@ -0,0 +1,19 @@ +#include <linux/smp.h> +#include <linux/module.h> + +static void __wbinvd(void *dummy) +{ + wbinvd(); +} + +void wbinvd_on_cpu(int cpu) +{ + smp_call_function_single(cpu, __wbinvd, NULL, 1); +} +EXPORT_SYMBOL(wbinvd_on_cpu); + +int wbinvd_on_all_cpus(void) +{ + return on_each_cpu(__wbinvd, NULL, 1); +} +EXPORT_SYMBOL(wbinvd_on_all_cpus); |