Re: [PATCH] powerpc/kernel/sysfs: Export ldbar spr to sysfs
From: Madhavan Srinivasan <hidden>
Date: 2017-10-30 11:56:37
On Friday 27 October 2017 03:04 PM, Anju T Sudhakar wrote:
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Add ldbar spr to sysfs. The spr will hold thread level In-Memory Collection (IMC) counter configuration data. Signed-off-by: Anju T Sudhakar <redacted> Acked-by: Madhavan Srinivasan <redacted> --- arch/powerpc/kernel/sysfs.c | 8 ++++++++ 1 file changed, 8 insertions(+)diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 4437c70c7c2b..8efcaece4796 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c@@ -466,6 +466,7 @@ static ssize_t __used \ #ifdef HAS_PPC_PMC_CLASSIC SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); +SYSFS_PMCSETUP(ldbar, SPRN_LDBAR);
My bad. Missed to mention this. For ldbar spr, use SYSFS_SPRSETUP macro instead. Maddy
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SYSFS_PMCSETUP(pmc1, SPRN_PMC1); SYSFS_PMCSETUP(pmc2, SPRN_PMC2); SYSFS_PMCSETUP(pmc3, SPRN_PMC3);@@ -492,6 +493,7 @@ SYSFS_SPRSETUP(pir, SPRN_PIR); Lets be conservative and default to pseries. */ static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra); +static DEVICE_ATTR(ldbar, 0600, show_ldbar, store_ldbar); static DEVICE_ATTR(spurr, 0400, show_spurr, NULL); static DEVICE_ATTR(purr, 0400, show_purr, store_purr); static DEVICE_ATTR(pir, 0400, show_pir, NULL);@@ -757,6 +759,9 @@ static int register_cpu_online(unsigned int cpu) device_create_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64 + if (cpu_has_feature(CPU_FTR_ARCH_300)) + device_create_file(s, &dev_attr_ldbar); + if (cpu_has_feature(CPU_FTR_MMCRA)) device_create_file(s, &dev_attr_mmcra);@@ -842,6 +847,9 @@ static int unregister_cpu_online(unsigned int cpu) device_remove_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64 + if (cpu_has_feature(CPU_FTR_ARCH_300)) + device_remove_file(s, &dev_attr_ldbar); + if (cpu_has_feature(CPU_FTR_MMCRA)) device_remove_file(s, &dev_attr_mmcra);