From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Date: Tue, 28 May 2013 10:39:50 +0000 (+0000)
Subject: powerpc/cputable: Fix oprofile_cpu_type on power8
X-Git-Tag: firefly_0821_release~3680^2~378^2~11
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2ac6f427ad837a69561160b282eff80d9f0c2466;p=firefly-linux-kernel-4.4.55.git
powerpc/cputable: Fix oprofile_cpu_type on power8
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>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c60bbec25c1f..b8808bcb9e4e 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,