> On 01-Mar-2021, at 5:39 PM, Christophe Leroy <christophe.le...@csgroup.eu> > wrote: > > From: Rashmica Gupta <rashmic...@gmail.com> > > 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 <m...@ellerman.id.au> > Signed-off-by: Rashmica Gupta <rashmic...@gmail.com> > Reviewed-by: Madhavan Srinivasan <ma...@linux.vnet.ibm.com> > [chleroy: Added power10 and fixed checkpatch issues] > Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
Reviewed-and-tested-by: Athira Rajeev <atraj...@linux.vnet.ibm.com <mailto:atraj...@linux.vnet.ibm.com>> Thanks Athira > --- > arch/powerpc/perf/e500-pmu.c | 9 +++++---- > arch/powerpc/perf/e6500-pmu.c | 5 +++-- > arch/powerpc/perf/hv-24x7.c | 6 +++--- > arch/powerpc/perf/mpc7450-pmu.c | 5 +++-- > arch/powerpc/perf/power10-pmu.c | 6 ++---- > 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 | 7 ++++--- > 12 files changed, 37 insertions(+), 33 deletions(-) > > diff --git a/arch/powerpc/perf/e500-pmu.c b/arch/powerpc/perf/e500-pmu.c > index a59c33bed32a..e3e1a68eb1d5 100644 > --- a/arch/powerpc/perf/e500-pmu.c > +++ b/arch/powerpc/perf/e500-pmu.c > @@ -118,12 +118,13 @@ 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 44ad65da82ed..bd779a2338f8 100644 > --- a/arch/powerpc/perf/e6500-pmu.c > +++ b/arch/powerpc/perf/e6500-pmu.c > @@ -107,8 +107,9 @@ 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 e5eb33255066..f3f2472fa1c6 100644 > --- a/arch/powerpc/perf/hv-24x7.c > +++ b/arch/powerpc/perf/hv-24x7.c > @@ -1718,16 +1718,16 @@ 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 e39b15b79a83..552d51a925d3 100644 > --- a/arch/powerpc/perf/mpc7450-pmu.c > +++ b/arch/powerpc/perf/mpc7450-pmu.c > @@ -417,8 +417,9 @@ 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/power10-pmu.c b/arch/powerpc/perf/power10-pmu.c > index a901c1348cad..d1395844a329 100644 > --- a/arch/powerpc/perf/power10-pmu.c > +++ b/arch/powerpc/perf/power10-pmu.c > @@ -566,12 +566,10 @@ int init_power10_pmu(void) > unsigned int pvr; > int rc; > > - /* Comes from cpu_specs[] */ > - if (!cur_cpu_spec->oprofile_cpu_type || > - strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power10")) > + pvr = mfspr(SPRN_PVR); > + if (PVR_VER(pvr) != PVR_POWER10) > return -ENODEV; > > - pvr = mfspr(SPRN_PVR); > /* Add the ppmu flag for power10 DD1 */ > if ((PVR_CFG(pvr) == 1)) > power10_pmu.flags |= PPMU_P10_DD1; > diff --git a/arch/powerpc/perf/power5+-pmu.c b/arch/powerpc/perf/power5+-pmu.c > index 18732267993a..a79eae40ef6d 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 = { > > int 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 cb611c1e7abe..35a9d7f3b4b9 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 = { > > int 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 69ef38216418..8aa220c712a7 100644 > --- a/arch/powerpc/perf/power6-pmu.c > +++ b/arch/powerpc/perf/power6-pmu.c > @@ -541,8 +541,9 @@ static struct power_pmu power6_pmu = { > > int 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 894c17f9a762..ca7373143b02 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 = { > > int 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 5282e8415ddf..5a396ba8bf58 100644 > --- a/arch/powerpc/perf/power8-pmu.c > +++ b/arch/powerpc/perf/power8-pmu.c > @@ -381,9 +381,10 @@ static struct power_pmu power8_pmu = { > int 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 2a57e93a79dc..28ba1e98f93d 100644 > --- a/arch/powerpc/perf/power9-pmu.c > +++ b/arch/powerpc/perf/power9-pmu.c > @@ -444,9 +444,7 @@ int 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 1f8263785286..39a0a4d7841c 100644 > --- a/arch/powerpc/perf/ppc970-pmu.c > +++ b/arch/powerpc/perf/ppc970-pmu.c > @@ -491,9 +491,10 @@ static struct power_pmu ppc970_pmu = { > > int 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); > -- > 2.25.0 >
