This patch enables the AMD performance events support to Hygon
Family 18h CPU:
- Add Hygon Family 18h support in amd_core_pmu_init() and
amd_uncore_init().
- Rename x86_pmu.name from "AMD" to "HYGON" on Hygon platforms.
- Add Hygon support in PMU init codes in init_hw_perf_events().
Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
arch/x86/events/amd/core.c | 10 ++++++++++
arch/x86/events/amd/uncore.c | 7 ++++---
arch/x86/events/core.c | 1 +
3 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index c84584b..59c7b57 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -669,6 +669,13 @@ static int __init amd_core_pmu_init(void)
* We fallback to using default amd_get_event_constraints.
*/
break;
+ case 0x18:
+ pr_cont("Fam18h ");
+ /*
+ * In family 18h, there are no event constraints in the PMC hardware.
+ * We fallback to using default amd_get_event_constraints.
+ */
+ break;
default:
pr_err("core perfctr but no constraints; unknown hardware!\n");
return -ENODEV;
@@ -702,6 +709,9 @@ __init int amd_pmu_init(void)
x86_pmu = amd_pmu;
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+ x86_pmu.name = "HYGON";
+
ret = amd_core_pmu_init();
if (ret)
return ret;
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index f5cbbba..f8b0890 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -524,15 +524,16 @@ static int __init amd_uncore_init(void)
{
int ret = -ENODEV;
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+ boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
return -ENODEV;
if (!boot_cpu_has(X86_FEATURE_TOPOEXT))
return -ENODEV;
- if (boot_cpu_data.x86 == 0x17) {
+ if (boot_cpu_data.x86 == 0x17 || boot_cpu_data.x86 == 0x18) {
/*
- * For F17h, the Northbridge counters are repurposed as Data
+ * For F17h and F18h, the Northbridge counters are repurposed as Data
* Fabric counters. Also, L3 counters are supported too. The PMUs
* are exported based on family as either L2 or L3 and NB or DF.
*/
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 45b2b1c..60efd9b 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1773,6 +1773,7 @@ static int __init init_hw_perf_events(void)
case X86_VENDOR_INTEL:
err = intel_pmu_init();
break;
+ case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
err = amd_pmu_init();
break;
--
2.7.4
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