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-24x7.c | 163 +++++++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 147 insertions(+), 16 deletions(-)
diff --git a/kernel/arch/powerpc/perf/hv-24x7.c b/kernel/arch/powerpc/perf/hv-24x7.c
index 2bb7989..61a0874 100644
--- a/kernel/arch/powerpc/perf/hv-24x7.c
+++ b/kernel/arch/powerpc/perf/hv-24x7.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hypervisor supplied "24x7" performance counter support
*
* Author: Cody P Schafer <cody@linux.vnet.ibm.com>
* Copyright 2014 IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#define pr_fmt(fmt) "hv-24x7: " fmt
@@ -24,6 +20,7 @@
#include <asm/io.h>
#include <linux/byteorder/generic.h>
+#include <asm/rtas.h>
#include "hv-24x7.h"
#include "hv-24x7-catalog.h"
#include "hv-common.h"
@@ -33,6 +30,8 @@
/* Whether we have to aggregate result data for some domains. */
static bool aggregate_result_elements;
+
+static cpumask_t hv_24x7_cpumask;
static bool domain_is_valid(unsigned domain)
{
@@ -58,6 +57,59 @@
#undef DOMAIN
default:
return false;
+ }
+}
+
+/*
+ * The Processor Module Information system parameter allows transferring
+ * of certain processor module information from the platform to the OS.
+ * Refer PAPR+ document to get parameter token value as '43'.
+ */
+
+#define PROCESSOR_MODULE_INFO 43
+
+static u32 phys_sockets; /* Physical sockets */
+static u32 phys_chipspersocket; /* Physical chips per socket*/
+static u32 phys_coresperchip; /* Physical cores per chip */
+
+/*
+ * read_24x7_sys_info()
+ * Retrieve the number of sockets and chips per socket and cores per
+ * chip details through the get-system-parameter rtas call.
+ */
+void read_24x7_sys_info(void)
+{
+ const s32 token = rtas_token("ibm,get-system-parameter");
+ int call_status;
+
+ /*
+ * Making system parameter: chips and sockets and cores per chip
+ * default to 1.
+ */
+ phys_sockets = 1;
+ phys_chipspersocket = 1;
+ phys_coresperchip = 1;
+
+ do {
+ spin_lock(&rtas_data_buf_lock);
+ call_status = rtas_call(token, 3, 1, NULL, PROCESSOR_MODULE_INFO,
+ __pa(rtas_data_buf), RTAS_DATA_BUF_SIZE);
+ if (call_status == 0) {
+ int ntypes = be16_to_cpup((__be16 *)&rtas_data_buf[2]);
+ int len = be16_to_cpup((__be16 *)&rtas_data_buf[0]);
+
+ if (len >= 8 && ntypes != 0) {
+ phys_sockets = be16_to_cpup((__be16 *)&rtas_data_buf[4]);
+ phys_chipspersocket = be16_to_cpup((__be16 *)&rtas_data_buf[6]);
+ phys_coresperchip = be16_to_cpup((__be16 *)&rtas_data_buf[8]);
+ }
+ }
+ spin_unlock(&rtas_data_buf_lock);
+ } while (rtas_busy_delay(call_status));
+
+ if (call_status != 0) {
+ pr_err("Error calling get-system-parameter %d\n",
+ call_status);
}
}
@@ -390,6 +442,30 @@
return sprintf(buf, "%s\n", (char *)d->var);
}
+static ssize_t cpumask_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return cpumap_print_to_pagebuf(true, buf, &hv_24x7_cpumask);
+}
+
+static ssize_t sockets_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", phys_sockets);
+}
+
+static ssize_t chipspersocket_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", phys_chipspersocket);
+}
+
+static ssize_t coresperchip_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", phys_coresperchip);
+}
+
static struct attribute *device_str_attr_create_(char *name, char *str)
{
struct dev_ext_attribute *attr = kzalloc(sizeof(*attr), GFP_KERNEL);
@@ -571,7 +647,7 @@
struct event_uniq *it;
int result;
- it = container_of(*new, struct event_uniq, node);
+ it = rb_entry(*new, struct event_uniq, node);
result = ev_uniq_ord(name, nl, domain, it->name, it->nl,
it->domain);
@@ -1036,16 +1112,32 @@
(unsigned long long)be32_to_cpu(page_0->length) * 4096);
static BIN_ATTR_RO(catalog, 0/* real length varies */);
static DEVICE_ATTR_RO(domains);
+static DEVICE_ATTR_RO(sockets);
+static DEVICE_ATTR_RO(chipspersocket);
+static DEVICE_ATTR_RO(coresperchip);
+static DEVICE_ATTR_RO(cpumask);
static struct bin_attribute *if_bin_attrs[] = {
&bin_attr_catalog,
NULL,
};
+static struct attribute *cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group cpumask_attr_group = {
+ .attrs = cpumask_attrs,
+};
+
static struct attribute *if_attrs[] = {
&dev_attr_catalog_len.attr,
&dev_attr_catalog_version.attr,
&dev_attr_domains.attr,
+ &dev_attr_sockets.attr,
+ &dev_attr_chipspersocket.attr,
+ &dev_attr_coresperchip.attr,
NULL,
};
@@ -1061,6 +1153,7 @@
&event_desc_group,
&event_long_desc_group,
&if_group,
+ &cpumask_attr_group,
NULL,
};
@@ -1306,15 +1399,6 @@
return -EINVAL;
}
- /* unsupported modes and filters */
- if (event->attr.exclude_user ||
- event->attr.exclude_kernel ||
- event->attr.exclude_hv ||
- event->attr.exclude_idle ||
- event->attr.exclude_host ||
- event->attr.exclude_guest)
- return -EINVAL;
-
/* no branch sampling */
if (has_branch_stack(event))
return -EOPNOTSUPP;
@@ -1326,7 +1410,7 @@
}
domain = event_get_domain(event);
- if (domain >= HV_PERF_DOMAIN_MAX) {
+ if (domain == 0 || domain >= HV_PERF_DOMAIN_MAX) {
pr_devel("invalid domain %d\n", domain);
return -EINVAL;
}
@@ -1567,7 +1651,47 @@
.start_txn = h_24x7_event_start_txn,
.commit_txn = h_24x7_event_commit_txn,
.cancel_txn = h_24x7_event_cancel_txn,
+ .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
};
+
+static int ppc_hv_24x7_cpu_online(unsigned int cpu)
+{
+ if (cpumask_empty(&hv_24x7_cpumask))
+ cpumask_set_cpu(cpu, &hv_24x7_cpumask);
+
+ return 0;
+}
+
+static int ppc_hv_24x7_cpu_offline(unsigned int cpu)
+{
+ int target;
+
+ /* Check if exiting cpu is used for collecting 24x7 events */
+ if (!cpumask_test_and_clear_cpu(cpu, &hv_24x7_cpumask))
+ return 0;
+
+ /* Find a new cpu to collect 24x7 events */
+ target = cpumask_last(cpu_active_mask);
+
+ if (target < 0 || target >= nr_cpu_ids) {
+ pr_err("hv_24x7: CPU hotplug init failed\n");
+ return -1;
+ }
+
+ /* Migrate 24x7 events to the new target */
+ cpumask_set_cpu(target, &hv_24x7_cpumask);
+ perf_pmu_migrate_context(&h_24x7_pmu, cpu, target);
+
+ return 0;
+}
+
+static int hv_24x7_cpu_hotplug_init(void)
+{
+ return cpuhp_setup_state(CPUHP_AP_PERF_POWERPC_HV_24x7_ONLINE,
+ "perf/powerpc/hv_24x7:online",
+ ppc_hv_24x7_cpu_online,
+ ppc_hv_24x7_cpu_offline);
+}
static int hv_24x7_init(void)
{
@@ -1613,10 +1737,17 @@
if (r)
return r;
+ /* init cpuhotplug */
+ r = hv_24x7_cpu_hotplug_init();
+ if (r)
+ return r;
+
r = perf_pmu_register(&h_24x7_pmu, h_24x7_pmu.name, -1);
if (r)
return r;
+ read_24x7_sys_info();
+
return 0;
}
--
Gitblit v1.6.2