Add ldbar spr to sysfs. The spr holds thread level In-Memory Collection (IMC)
counter configuration data. Exposing this will help to understand the current
configuration of thread-level counters in the system.
Primarily, Bit 0 of ldbar says whether the counters are enabled or not.
And bit 1 indicates the mode (if 0-Accumulation Mode/if 1-Trace Mode).
Signed-off-by: Anju T Sudhakar <[email protected]>
---
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 4437c70..caefb64 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -485,6 +485,7 @@ SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
SYSFS_SPRSETUP(purr, SPRN_PURR);
SYSFS_SPRSETUP(spurr, SPRN_SPURR);
SYSFS_SPRSETUP(pir, SPRN_PIR);
+SYSFS_SPRSETUP(ldbar, SPRN_LDBAR);
/*
Lets only enable read for phyp resources and
@@ -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, 0400, show_ldbar, NULL);
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);
--
2.7.4
From 1583592739907803577@xxx Thu Nov 09 12:48:43 +0000 2017
X-GM-THRID: 1583590581263009515
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread
Hi,
Kindly ignore this patch, I send a wrong version. Will send out the
right one.
Thanks,
Anju
On Thursday 09 November 2017 05:43 PM, Anju T Sudhakar wrote:
> Add ldbar spr to sysfs. The spr holds thread level In-Memory Collection (IMC)
> counter configuration data. Exposing this will help to understand the current
> configuration of thread-level counters in the system.
> Primarily, Bit 0 of ldbar says whether the counters are enabled or not.
> And bit 1 indicates the mode (if 0-Accumulation Mode/if 1-Trace Mode).
>
> Signed-off-by: Anju T Sudhakar <[email protected]>
> ---
> 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 4437c70..f8caee0 100644
> --- a/arch/powerpc/kernel/sysfs.c
> +++ b/arch/powerpc/kernel/sysfs.c
> @@ -485,6 +485,7 @@ SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
> SYSFS_SPRSETUP(purr, SPRN_PURR);
> SYSFS_SPRSETUP(spurr, SPRN_SPURR);
> SYSFS_SPRSETUP(pir, SPRN_PIR);
> +SYSFS_SPRSETUP(ldbar, SPRN_LDBAR);
>
> /*
> Lets only enable read for phyp resources and
> @@ -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, 0400, 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);
>
From 1583590581263009515@xxx Thu Nov 09 12:14:25 +0000 2017
X-GM-THRID: 1583590581263009515
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