| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1329236924.2293.13.camel@twins>
Date: Tue, 14 Feb 2012 17:28:44 +0100
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
To: Jiri Olsa <jolsa@...hat.com>
Cc: acme@...hat.com, mingo@...e.hu, paulus@...ba.org,
cjashfor@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4 0/9] perf tool: parser generator for events parsing
On Fri, 2012-01-27 at 15:34 +0100, Jiri Olsa wrote:
> hi,
> Here's new version of event parsing patchset. To summarize:
> - adding event parser bison/flex generator
> - the event syntax stays as it was
> - adding event format sysfs group attribute
> for pmu device
> - adding new syntax to specify raw events based
> on the sysfs pmu's format attribute
> eg. "cpu/config=1,config1=2,config2=3/u"
>
> There are helping patches 1-4, which I did not want to
> mangle with the actual change. Patches 5-9 implement
> the feature itself.
>
> v4 changes:
> - 5/9 changed sysfs pmu format definitions to the group attribute,
> each line (in previous patch) is now represented by single
> sysfs attribute under format group
> - 6/9 fix raw events so the number is always considered to be hex number
> - 8/9 move config[12] definitions to be processed by the parser
I added the below but all I managed was to crash my kernel, its probably
a simple thing, but sysfs didn't give a hint.
---
Subject: perf, x86: Add simple format descriptions
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Date: Tue Feb 14 16:37:27 CET 2012
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
arch/x86/kernel/cpu/perf_event.c | 7 ++++++
arch/x86/kernel/cpu/perf_event.h | 1
arch/x86/kernel/cpu/perf_event_amd.c | 18 +++++++++++++++++
arch/x86/kernel/cpu/perf_event_intel.c | 34 +++++++++++++++++++++++++++++++++
arch/x86/kernel/cpu/perf_event_p6.c | 18 +++++++++++++++++
include/linux/perf_event.h | 6 -----
kernel/events/core.c | 22 ---------------------
7 files changed, 78 insertions(+), 28 deletions(-)
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1250,6 +1250,11 @@ static void __init pmu_check_apic(void)
pr_info("no hardware sampling interrupt available.\n");
}
+static struct attribute_group x86_pmu_format_group = {
+ .name = "format",
+ .attrs = NULL,
+};
+
static int __init init_hw_perf_events(void)
{
struct x86_pmu_quirk *quirk;
@@ -1324,6 +1329,7 @@ static int __init init_hw_perf_events(vo
}
x86_pmu.attr_rdpmc = 1; /* enable userspace RDPMC usage by default */
+ x86_pmu_format_group.attrs = x86_pmu.format_attrs;
pr_info("... version: %d\n", x86_pmu.version);
pr_info("... bit width: %d\n", x86_pmu.cntval_bits);
@@ -1604,6 +1610,7 @@ static struct attribute_group x86_pmu_at
static const struct attribute_group *x86_pmu_attr_groups[] = {
&x86_pmu_attr_group,
+ &x86_pmu_format_group,
NULL,
};
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -311,6 +311,7 @@ struct x86_pmu {
* sysfs attrs
*/
int attr_rdpmc;
+ struct attribute **format_attrs;
/*
* CPU Hotplug hooks
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -398,6 +398,20 @@ static void amd_pmu_cpu_dead(int cpu)
}
}
+PMU_FORMAT_ATTR(event, "config:0-7,32-35");
+PMU_FORMAT_ATTR(umask, "config:8-15" );
+PMU_FORMAT_ATTR(edge, "config:18" );
+PMU_FORMAT_ATTR(inv, "config:23" );
+PMU_FORMAT_ATTR(cmask, "config:24-31" );
+
+static struct attribute *amd_format_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_umask.attr,
+ &format_attr_edge.attr,
+ &format_attr_inv.attr,
+ &format_attr_cmask.attr,
+};
+
static __initconst const struct x86_pmu amd_pmu = {
.name = "AMD",
.handle_irq = x86_pmu_handle_irq,
@@ -420,6 +434,8 @@ static __initconst const struct x86_pmu
.get_event_constraints = amd_get_event_constraints,
.put_event_constraints = amd_put_event_constraints,
+ .format_attrs = amd_format_attr,
+
.cpu_prepare = amd_pmu_cpu_prepare,
.cpu_starting = amd_pmu_cpu_starting,
.cpu_dead = amd_pmu_cpu_dead,
@@ -590,6 +606,8 @@ static __initconst const struct x86_pmu
.cpu_starting = amd_pmu_cpu_starting,
.cpu_dead = amd_pmu_cpu_dead,
#endif
+
+ .format_attrs = amd_format_attr,
};
__init int amd_pmu_init(void)
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1382,6 +1382,23 @@ static void core_pmu_enable_all(int adde
}
}
+PMU_FORMAT_ATTR(event, "config:0-7" );
+PMU_FORMAT_ATTR(umask, "config:8-15" );
+PMU_FORMAT_ATTR(edge, "config:18" );
+PMU_FORMAT_ATTR(pc, "config:19" );
+PMU_FORMAT_ATTR(any, "config:21" ); /* v3 + */
+PMU_FORMAT_ATTR(inv, "config:23" );
+PMU_FORMAT_ATTR(cmask, "config:24-31" );
+
+static struct attribute *intel_arch_formats_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_umask.attr,
+ &format_attr_edge.attr,
+ &format_attr_pc.attr,
+ &format_attr_inv.attr,
+ &format_attr_cmask.attr,
+};
+
static __initconst const struct x86_pmu core_pmu = {
.name = "core",
.handle_irq = x86_pmu_handle_irq,
@@ -1406,6 +1423,7 @@ static __initconst const struct x86_pmu
.put_event_constraints = intel_put_event_constraints,
.event_constraints = intel_core_event_constraints,
.guest_get_msrs = core_guest_get_msrs,
+ .format_attrs = intel_arch_formats_attr,
};
struct intel_shared_regs *allocate_shared_regs(int cpu)
@@ -1486,6 +1504,20 @@ static void intel_pmu_cpu_dying(int cpu)
fini_debug_store_on_cpu(cpu);
}
+PMU_FORMAT_ATTR(offcore_rsp, "config1:0-63");
+
+static struct attribute *intel_arch3_formats_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_umask.attr,
+ &format_attr_edge.attr,
+ &format_attr_pc.attr,
+ &format_attr_any.attr,
+ &format_attr_inv.attr,
+ &format_attr_cmask.attr,
+
+ &format_attr_offcore_rsp.attr, /* XXX do NHM/WSM + SNB breakout */
+};
+
static __initconst const struct x86_pmu intel_pmu = {
.name = "Intel",
.handle_irq = intel_pmu_handle_irq,
@@ -1509,6 +1541,8 @@ static __initconst const struct x86_pmu
.get_event_constraints = intel_get_event_constraints,
.put_event_constraints = intel_put_event_constraints,
+ .format_attrs = intel_arch3_formats_attr,
+
.cpu_prepare = intel_pmu_cpu_prepare,
.cpu_starting = intel_pmu_cpu_starting,
.cpu_dying = intel_pmu_cpu_dying,
--- a/arch/x86/kernel/cpu/perf_event_p6.c
+++ b/arch/x86/kernel/cpu/perf_event_p6.c
@@ -87,6 +87,22 @@ static void p6_pmu_enable_event(struct p
(void)checking_wrmsrl(hwc->config_base, val);
}
+PMU_FORMAT_ATTR(event, "config:0-7" );
+PMU_FORMAT_ATTR(umask, "config:8-15" );
+PMU_FORMAT_ATTR(edge, "config:18" );
+PMU_FORMAT_ATTR(pc, "config:19" );
+PMU_FORMAT_ATTR(inv, "config:23" );
+PMU_FORMAT_ATTR(cmask, "config:24-31" );
+
+static struct attribute *intel_p6_formats_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_umask.attr,
+ &format_attr_edge.attr,
+ &format_attr_pc.attr,
+ &format_attr_inv.attr,
+ &format_attr_cmask.attr,
+};
+
static __initconst const struct x86_pmu p6_pmu = {
.name = "p6",
.handle_irq = x86_pmu_handle_irq,
@@ -115,6 +131,8 @@ static __initconst const struct x86_pmu
.cntval_mask = (1ULL << 32) - 1,
.get_event_constraints = x86_get_event_constraints,
.event_constraints = p6_event_constraints,
+
+ .format_attrs = intel_p6_formats_attr,
};
__init int p6_pmu_init(void)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -628,12 +628,6 @@ struct pmu {
int task_ctx_nr;
/*
- * True if the pmu defines its own set of format attributes within
- * attr_groups. If false, default format attributes are used.
- */
- bool format_defined;
-
- /*
* Fully disable/enable this PMU, can be used to protect from the PMI
* as well as for lazy/batch writing of the MSRs.
*/
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5540,22 +5540,6 @@ static struct bus_type pmu_bus = {
.dev_attrs = pmu_dev_attrs,
};
-/* Default format attributes. */
-PMU_FORMAT_ATTR(config, "config:0-63");
-PMU_FORMAT_ATTR(config1, "config1:0-63");
-PMU_FORMAT_ATTR(config2, "config2:0-63");
-
-static struct attribute *format_attrs[] = {
- &format_attr_config.attr,
- &format_attr_config1.attr,
- &format_attr_config2.attr,
-};
-
-static struct attribute_group format_attr_group = {
- .name = "format",
- .attrs = format_attrs,
-};
-
static void pmu_dev_release(struct device *dev)
{
kfree(dev);
@@ -5582,12 +5566,6 @@ static int pmu_dev_alloc(struct pmu *pmu
if (ret)
goto free_dev;
- if (!pmu->format_defined) {
- ret = sysfs_create_group(&pmu->dev->kobj, &format_attr_group);
- if (ret)
- goto free_dev;
- }
-
out:
return ret;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists