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powerpc: Export PIR data through sysfs

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On Fri, Nov 11, 2011 at 10:17:55AM +0530, Ananth N Mavinakayanahalli wrote:
> >
> > At this rate we're going to end up with no bits left for CPU features
> > way too quickly... Especially for something we only care about once at
> > boot time.
> >
> > Wouldn't CPU_FTR_PPCAS_ARCH_V2 be a good enough test ?
>
> /me checks Cell manuals... yes, that test would be good enough. I will
> cook up a patch to use this.

Here it is...

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Ananth N Mavinakayanahalli 2011-11-10 19:58:53 +00:00 committed by Benjamin Herrenschmidt
parent 184cd4a3b9
commit 595fe91447
1 changed files with 8 additions and 0 deletions
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8
arch/powerpc/kernel/sysfs.c
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@ -177,11 +177,13 @@ SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
SYSFS_PMCSETUP(purr, SPRN_PURR);
SYSFS_PMCSETUP(spurr, SPRN_SPURR);
SYSFS_PMCSETUP(dscr, SPRN_DSCR);
SYSFS_PMCSETUP(pir, SPRN_PIR);
static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
static SYSDEV_ATTR(pir, 0400, show_pir, NULL);
unsigned long dscr_default = 0;
EXPORT_SYMBOL(dscr_default);
@ -392,6 +394,9 @@ static void __cpuinit register_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_DSCR))
sysdev_create_file(s, &attr_dscr);
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
sysdev_create_file(s, &attr_pir);
#endif /* CONFIG_PPC64 */
cacheinfo_cpu_online(cpu);
@ -462,6 +467,9 @@ static void unregister_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_DSCR))
sysdev_remove_file(s, &attr_dscr);
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
sysdev_remove_file(s, &attr_pir);
#endif /* CONFIG_PPC64 */
cacheinfo_cpu_offline(cpu);