* [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8
@ 2013-05-28 20:39 Nishanth Aravamudan
2013-06-05 4:34 ` Michael Neuling
0 siblings, 1 reply; 4+ messages in thread
From: Nishanth Aravamudan @ 2013-05-28 20:39 UTC (permalink / raw)
To: benh; +Cc: Maynard Johnson, Michael Neuling, linuxppc-dev
Maynard informed me that neither the oprofile kernel module nor oprofile
userspace has been updated to support that "legacy" oprofile module
interface for power8, which is indicated by "ppc64/power8." This results
in no samples. The solution is to default to the "timer" type, instead.
The raw entry also should be updated, as "ppc64/ibm-compat-v1" indicates
to oprofile userspace to use "compatibility events" which are obsolete
in ISA 2.07.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
---
Ben, if this seems reasonable to you, it would be great to get this into
3.10.
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c60bbec..b8808bc 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -453,7 +453,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 128,
.dcache_bsize = 128,
.oprofile_type = PPC_OPROFILE_POWER4,
- .oprofile_cpu_type = "ppc64/ibm-compat-v1",
+ .oprofile_cpu_type = 0,
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
.platform = "power8",
@@ -506,7 +506,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
- .oprofile_cpu_type = "ppc64/power8",
+ .oprofile_cpu_type = 0,
.oprofile_type = PPC_OPROFILE_POWER4,
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8
2013-05-28 20:39 [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8 Nishanth Aravamudan
@ 2013-06-05 4:34 ` Michael Neuling
2013-06-05 5:35 ` Michael Neuling
2013-06-05 5:38 ` [PATCH] powerpc/power8: Fix oprofile and perf Michael Neuling
0 siblings, 2 replies; 4+ messages in thread
From: Michael Neuling @ 2013-06-05 4:34 UTC (permalink / raw)
To: Nishanth Aravamudan; +Cc: Maynard Johnson, linuxppc-dev
Benh and Nish,
This breaks all perf HW events on POWER8.
Please revert this. It's
2ac6f427ad837a69561160b282eff80d9f0c2466 upstream.
Noticed by mpe.
Mikey
Nishanth Aravamudan <nacc@linux.vnet.ibm.com> wrote:
> Maynard informed me that neither the oprofile kernel module nor oprofile
> userspace has been updated to support that "legacy" oprofile module
> interface for power8, which is indicated by "ppc64/power8." This results
> in no samples. The solution is to default to the "timer" type, instead.
> The raw entry also should be updated, as "ppc64/ibm-compat-v1" indicates
> to oprofile userspace to use "compatibility events" which are obsolete
> in ISA 2.07.
>
> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
>
> ---
> Ben, if this seems reasonable to you, it would be great to get this into
> 3.10.
>
> diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
> index c60bbec..b8808bc 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -453,7 +453,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
> .icache_bsize = 128,
> .dcache_bsize = 128,
> .oprofile_type = PPC_OPROFILE_POWER4,
> - .oprofile_cpu_type = "ppc64/ibm-compat-v1",
> + .oprofile_cpu_type = 0,
> .cpu_setup = __setup_cpu_power8,
> .cpu_restore = __restore_cpu_power8,
> .platform = "power8",
> @@ -506,7 +506,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
> .dcache_bsize = 128,
> .num_pmcs = 6,
> .pmc_type = PPC_PMC_IBM,
> - .oprofile_cpu_type = "ppc64/power8",
> + .oprofile_cpu_type = 0,
> .oprofile_type = PPC_OPROFILE_POWER4,
> .cpu_setup = __setup_cpu_power8,
> .cpu_restore = __restore_cpu_power8,
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8
2013-06-05 4:34 ` Michael Neuling
@ 2013-06-05 5:35 ` Michael Neuling
2013-06-05 5:38 ` [PATCH] powerpc/power8: Fix oprofile and perf Michael Neuling
1 sibling, 0 replies; 4+ messages in thread
From: Michael Neuling @ 2013-06-05 5:35 UTC (permalink / raw)
To: Nishanth Aravamudan, benh; +Cc: linuxppc-dev, Maynard Johnson
In 2ac6f42 powerpc/cputable: Fix oprofile_cpu_type on power8
we broke all power8 hw events.
This reverts this change and uses oprofile_type instead. Perf now works
on POWER8 again and oprofile will revert to using timers on POWER8.
Kudos to mpe this fix.
Signed-off-by: Michael Neuling <mikey@neuling.org>
---
tag: for-3.10
benh: disregard my previous revert request and apply this instead
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 1f0937d..2a45d0f 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -452,8 +452,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.mmu_features = MMU_FTRS_POWER8,
.icache_bsize = 128,
.dcache_bsize = 128,
- .oprofile_type = PPC_OPROFILE_POWER4,
- .oprofile_cpu_type = 0,
+ .oprofile_type = PPC_OPROFILE_INVALID,
+ .oprofile_cpu_type = "ppc64/ibm-compat-v1",
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
.platform = "power8",
@@ -506,8 +506,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
- .oprofile_cpu_type = 0,
- .oprofile_type = PPC_OPROFILE_POWER4,
+ .oprofile_cpu_type = "ppc64/power8",
+ .oprofile_type = PPC_OPROFILE_INVALID,
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
.platform = "power8",
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] powerpc/power8: Fix oprofile and perf
2013-06-05 4:34 ` Michael Neuling
2013-06-05 5:35 ` Michael Neuling
@ 2013-06-05 5:38 ` Michael Neuling
1 sibling, 0 replies; 4+ messages in thread
From: Michael Neuling @ 2013-06-05 5:38 UTC (permalink / raw)
To: Nishanth Aravamudan, benh; +Cc: linuxppc-dev, Maynard Johnson
In 2ac6f42 powerpc/cputable: Fix oprofile_cpu_type on power8
we broke all power8 hw events.
This reverts this change and uses oprofile_type instead. Perf now works
on POWER8 again and oprofile will revert to using timers on POWER8.
Kudos to mpe this fix.
Signed-off-by: Michael Neuling <mikey@neuling.org>
---
tag: for-3.10
v2: renamed patch
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 1f0937d..2a45d0f 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -452,8 +452,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.mmu_features = MMU_FTRS_POWER8,
.icache_bsize = 128,
.dcache_bsize = 128,
- .oprofile_type = PPC_OPROFILE_POWER4,
- .oprofile_cpu_type = 0,
+ .oprofile_type = PPC_OPROFILE_INVALID,
+ .oprofile_cpu_type = "ppc64/ibm-compat-v1",
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
.platform = "power8",
@@ -506,8 +506,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
- .oprofile_cpu_type = 0,
- .oprofile_type = PPC_OPROFILE_POWER4,
+ .oprofile_cpu_type = "ppc64/power8",
+ .oprofile_type = PPC_OPROFILE_INVALID,
.cpu_setup = __setup_cpu_power8,
.cpu_restore = __restore_cpu_power8,
.platform = "power8",
^ permalink raw reply related [flat|nested] 4+ messages in thread
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2013-05-28 20:39 [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8 Nishanth Aravamudan
2013-06-05 4:34 ` Michael Neuling
2013-06-05 5:35 ` Michael Neuling
2013-06-05 5:38 ` [PATCH] powerpc/power8: Fix oprofile and perf Michael Neuling
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