[PATCH v2] powerpc/perf: Use PVR rather than oprofile field to determine CPU version
Rashmica Gupta
rashmica.g at gmail.com
Wed Feb 6 17:30:24 AEDT 2019
Currently the perf CPU backend drivers detect what CPU they're on using
cur_cpu_spec->oprofile_cpu_type.
Although that works, it's a bit crufty to be using oprofile related fields,
especially seeing as oprofile is more or less unused these days.
It also means perf is reliant on the fragile logic in setup_cpu_spec()
which detects when we're using a logical PVR and copies back the PMU
related fields from the raw CPU entry. So lets check the PVR directly.
Suggested-by: Michael Ellerman <mpe at ellerman.id.au>
Signed-off-by: Rashmica Gupta <rashmica.g at gmail.com>
---
v2: fixed misspelling of PVR_VER_E500V2
arch/powerpc/perf/e500-pmu.c | 10 ++++++----
arch/powerpc/perf/e6500-pmu.c | 5 +++--
arch/powerpc/perf/hv-24x7.c | 6 +++---
arch/powerpc/perf/mpc7450-pmu.c | 5 +++--
arch/powerpc/perf/power5+-pmu.c | 6 +++---
arch/powerpc/perf/power5-pmu.c | 5 +++--
arch/powerpc/perf/power6-pmu.c | 5 +++--
arch/powerpc/perf/power7-pmu.c | 7 ++++---
arch/powerpc/perf/power8-pmu.c | 5 +++--
arch/powerpc/perf/power9-pmu.c | 4 +---
arch/powerpc/perf/ppc970-pmu.c | 8 +++++---
11 files changed, 37 insertions(+), 29 deletions(-)
diff --git a/arch/powerpc/perf/e500-pmu.c b/arch/powerpc/perf/e500-pmu.c
index fb664929f5da..e1a185a30928 100644
--- a/arch/powerpc/perf/e500-pmu.c
+++ b/arch/powerpc/perf/e500-pmu.c
@@ -122,12 +122,14 @@ static struct fsl_emb_pmu e500_pmu = {
static int init_e500_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type)
- return -ENODEV;
+ unsigned int pvr = mfspr(SPRN_PVR);
- if (!strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/e500mc"))
+ /* ec500mc */
+ if ((PVR_VER(pvr) == PVR_VER_E500MC) || (PVR_VER(pvr) == PVR_VER_E5500))
num_events = 256;
- else if (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/e500"))
+ /* e500 */
+ else if ((PVR_VER(pvr) != PVR_VER_E500V1) &&
+ (PVR_VER(pvr) != PVR_VER_E500V2))
return -ENODEV;
return register_fsl_emb_pmu(&e500_pmu);
diff --git a/arch/powerpc/perf/e6500-pmu.c b/arch/powerpc/perf/e6500-pmu.c
index 3d877aa777b5..47c93d13da1a 100644
--- a/arch/powerpc/perf/e6500-pmu.c
+++ b/arch/powerpc/perf/e6500-pmu.c
@@ -111,8 +111,9 @@ static struct fsl_emb_pmu e6500_pmu = {
static int init_e6500_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/e6500"))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if (PVR_VER(pvr) != PVR_VER_E6500)
return -ENODEV;
return register_fsl_emb_pmu(&e6500_pmu);
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 72238eedc360..30dd379ddcd3 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1583,16 +1583,16 @@ static int hv_24x7_init(void)
{
int r;
unsigned long hret;
+ unsigned int pvr = mfspr(SPRN_PVR);
struct hv_perf_caps caps;
if (!firmware_has_feature(FW_FEATURE_LPAR)) {
pr_debug("not a virtualized system, not enabling\n");
return -ENODEV;
- } else if (!cur_cpu_spec->oprofile_cpu_type)
- return -ENODEV;
+ }
/* POWER8 only supports v1, while POWER9 only supports v2. */
- if (!strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8"))
+ if (PVR_VER(pvr) == PVR_POWER8)
interface_version = 1;
else {
interface_version = 2;
diff --git a/arch/powerpc/perf/mpc7450-pmu.c b/arch/powerpc/perf/mpc7450-pmu.c
index d115c5635bf3..17e69cabbcac 100644
--- a/arch/powerpc/perf/mpc7450-pmu.c
+++ b/arch/powerpc/perf/mpc7450-pmu.c
@@ -413,8 +413,9 @@ struct power_pmu mpc7450_pmu = {
static int __init init_mpc7450_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/7450"))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if (PVR_VER(pvr) != PVR_7450)
return -ENODEV;
return register_power_pmu(&mpc7450_pmu);
diff --git a/arch/powerpc/perf/power5+-pmu.c b/arch/powerpc/perf/power5+-pmu.c
index 0526dac66007..17a32e7ef234 100644
--- a/arch/powerpc/perf/power5+-pmu.c
+++ b/arch/powerpc/perf/power5+-pmu.c
@@ -679,9 +679,9 @@ static struct power_pmu power5p_pmu = {
static int __init init_power5p_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")
- && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5++")))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if (PVR_VER(pvr) != PVR_POWER5p)
return -ENODEV;
return register_power_pmu(&power5p_pmu);
diff --git a/arch/powerpc/perf/power5-pmu.c b/arch/powerpc/perf/power5-pmu.c
index 4dc99f9f7962..844782e6d367 100644
--- a/arch/powerpc/perf/power5-pmu.c
+++ b/arch/powerpc/perf/power5-pmu.c
@@ -620,8 +620,9 @@ static struct power_pmu power5_pmu = {
static int __init init_power5_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5"))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if (PVR_VER(pvr) != PVR_POWER5)
return -ENODEV;
return register_power_pmu(&power5_pmu);
diff --git a/arch/powerpc/perf/power6-pmu.c b/arch/powerpc/perf/power6-pmu.c
index 9c9d646b68a1..9659b781f588 100644
--- a/arch/powerpc/perf/power6-pmu.c
+++ b/arch/powerpc/perf/power6-pmu.c
@@ -542,8 +542,9 @@ static struct power_pmu power6_pmu = {
static int __init init_power6_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power6"))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if (PVR_VER(pvr) != PVR_POWER6)
return -ENODEV;
return register_power_pmu(&power6_pmu);
diff --git a/arch/powerpc/perf/power7-pmu.c b/arch/powerpc/perf/power7-pmu.c
index 6dbae9884ec4..79f05a7f28c6 100644
--- a/arch/powerpc/perf/power7-pmu.c
+++ b/arch/powerpc/perf/power7-pmu.c
@@ -447,11 +447,12 @@ static struct power_pmu power7_pmu = {
static int __init init_power7_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power7"))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if ((PVR_VER(pvr) != PVR_POWER7) && (PVR_VER(pvr) != PVR_POWER7p))
return -ENODEV;
- if (pvr_version_is(PVR_POWER7p))
+ if (PVR_VER(pvr) == PVR_POWER7p)
power7_pmu.flags |= PPMU_SIAR_VALID;
return register_power_pmu(&power7_pmu);
diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
index d12a2db26353..81a5142efab0 100644
--- a/arch/powerpc/perf/power8-pmu.c
+++ b/arch/powerpc/perf/power8-pmu.c
@@ -382,9 +382,10 @@ static struct power_pmu power8_pmu = {
static int __init init_power8_pmu(void)
{
int rc;
+ unsigned int pvr = mfspr(SPRN_PVR);
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8"))
+ if ((PVR_VER(pvr) != PVR_POWER8E) && (PVR_VER(pvr) != PVR_POWER8NVL)
+ && PVR_VER(pvr) != PVR_POWER8)
return -ENODEV;
rc = register_power_pmu(&power8_pmu);
diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
index 0ff9c43733e9..6b414b8bedfd 100644
--- a/arch/powerpc/perf/power9-pmu.c
+++ b/arch/powerpc/perf/power9-pmu.c
@@ -438,9 +438,7 @@ static int __init init_power9_pmu(void)
int rc = 0;
unsigned int pvr = mfspr(SPRN_PVR);
- /* Comes from cpu_specs[] */
- if (!cur_cpu_spec->oprofile_cpu_type ||
- strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power9"))
+ if (PVR_VER(pvr) != PVR_POWER9)
return -ENODEV;
/* Blacklist events */
diff --git a/arch/powerpc/perf/ppc970-pmu.c b/arch/powerpc/perf/ppc970-pmu.c
index 8b6a8a36fa38..5832de10e073 100644
--- a/arch/powerpc/perf/ppc970-pmu.c
+++ b/arch/powerpc/perf/ppc970-pmu.c
@@ -492,9 +492,11 @@ static struct power_pmu ppc970_pmu = {
static int __init init_ppc970_pmu(void)
{
- if (!cur_cpu_spec->oprofile_cpu_type ||
- (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/970")
- && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/970MP")))
+ unsigned int pvr = mfspr(SPRN_PVR);
+
+ if ((PVR_VER(pvr) != PVR_970) && (PVR_VER(pvr) != PVR_970MP)
+ && (PVR_VER(pvr) != PVR_970FX)
+ && (PVR_VER(pvr) != PVR_970GX))
return -ENODEV;
return register_power_pmu(&ppc970_pmu);
--
2.17.2
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