Subject: [PATCH v3 2/2] powerpc/perf: Power11 Performance Monitoring support

From: Madhavan Srinivasan <[email-masked]>
Date: Fri, 9 Feb 2024 09:37:53 +0530

Base enablement patch to register performance monitoring
hardware support for Power11. Most of fields are copied
from power10_pmu struct for power11_pmu struct.

Signed-off-by: Madhavan Srinivasan <[email-masked]>
---
Changelog V2:
- No change

Changelog v1:
- Copied power10 struct for power11 with name change

 arch/powerpc/perf/core-book3s.c |  2 ++
 arch/powerpc/perf/internal.h    |  1 +
 arch/powerpc/perf/power10-pmu.c | 27 +++++++++++++++++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index b7ff680cde96..6f0d46c53027 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2593,6 +2593,8 @@ static int __init init_ppc64_pmu(void)
 		return 0;
 	else if (!init_power10_pmu())
 		return 0;
+	else if (!init_power11_pmu())
+		return 0;
 	else if (!init_ppc970_pmu())
 		return 0;
 	else
diff --git a/arch/powerpc/perf/internal.h b/arch/powerpc/perf/internal.h
index 4c18b5504326..a70ac471a5a5 100644
--- a/arch/powerpc/perf/internal.h
+++ b/arch/powerpc/perf/internal.h
@@ -10,4 +10,5 @@ int __init init_power7_pmu(void);
 int __init init_power8_pmu(void);
 int __init init_power9_pmu(void);
 int __init init_power10_pmu(void);
+int __init init_power11_pmu(void);
 int __init init_generic_compat_pmu(void);
diff --git a/arch/powerpc/perf/power10-pmu.c b/arch/powerpc/perf/power10-pmu.c
index 9b5133e361a7..62a68b6b2d4b 100644
--- a/arch/powerpc/perf/power10-pmu.c
+++ b/arch/powerpc/perf/power10-pmu.c
@@ -634,3 +634,30 @@ int __init init_power10_pmu(void)
 
 	return 0;
 }
+
+static struct power_pmu power11_pmu;
+
+int __init init_power11_pmu(void)
+{
+	unsigned int pvr;
+	int rc;
+
+	pvr = mfspr(SPRN_PVR);
+	if (PVR_VER(pvr) != PVR_POWER11)
+		return -ENODEV;
+
+	/* Set the PERF_REG_EXTENDED_MASK here */
+	PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_31;
+
+	power11_pmu = power10_pmu;
+	power11_pmu.name = "Power11";
+
+	rc = register_power_pmu(&power11_pmu);
+	if (rc)
+		return rc;
+
+	/* Tell userspace that EBB is supported */
+	cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
+
+	return 0;
+}
-- 
2.43.0