From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/arch/powerpc/perf/hv-gpci.c | 33 ++++++++++++++++++++++++++++++++-
1 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/kernel/arch/powerpc/perf/hv-gpci.c b/kernel/arch/powerpc/perf/hv-gpci.c
index c756228..28b770b 100644
--- a/kernel/arch/powerpc/perf/hv-gpci.c
+++ b/kernel/arch/powerpc/perf/hv-gpci.c
@@ -72,7 +72,7 @@
static struct attribute_group event_group = {
.name = "events",
- .attrs = hv_gpci_event_attrs,
+ /* .attrs is set in init */
};
#define HV_CAPS_ATTR(_name, _format) \
@@ -330,6 +330,7 @@
int r;
unsigned long hret;
struct hv_perf_caps caps;
+ struct hv_gpci_request_buffer *arg;
hv_gpci_assert_offsets_correct();
@@ -353,6 +354,36 @@
/* sampling not supported */
h_gpci_pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+ arg = (void *)get_cpu_var(hv_gpci_reqb);
+ memset(arg, 0, HGPCI_REQ_BUFFER_SIZE);
+
+ /*
+ * hcall H_GET_PERF_COUNTER_INFO populates the output
+ * counter_info_version value based on the system hypervisor.
+ * Pass the counter request 0x10 corresponds to request type
+ * 'Dispatch_timebase_by_processor', to get the supported
+ * counter_info_version.
+ */
+ arg->params.counter_request = cpu_to_be32(0x10);
+
+ r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO,
+ virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE);
+ if (r) {
+ pr_devel("hcall failed, can't get supported counter_info_version: 0x%x\n", r);
+ arg->params.counter_info_version_out = 0x8;
+ }
+
+ /*
+ * Use counter_info_version_out value to assign
+ * required hv-gpci event list.
+ */
+ if (arg->params.counter_info_version_out >= 0x8)
+ event_group.attrs = hv_gpci_event_attrs;
+ else
+ event_group.attrs = hv_gpci_event_attrs_v6;
+
+ put_cpu_var(hv_gpci_reqb);
+
r = perf_pmu_register(&h_gpci_pmu, h_gpci_pmu.name, -1);
if (r)
return r;
--
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