Commit-ID: 914a76ca5eedc9f286a36f61c4eaa95b451ba3e6
Gitweb: http://git.kernel.org/tip/914a76ca5eedc9f286a36f61c4eaa95b451ba3e6
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 16 Mar 2011 15:44:33 -0400
Committer: Robert Richter <robert.richter@xxxxxxx>
CommitDate: Thu, 24 Mar 2011 18:45:44 +0100
oprofile, x86: Allow setting EDGE/INV/CMASK for counter events
For some performance events it's useful to set the EDGE and INV
bits and the CMASK mask in the counter control register. The list
of predefined events Intel releases for each CPU has some events which
require these settings to get more "natural" to use higher level events.
oprofile currently doesn't allow this.
This patch adds new extra configuration fields for them, so that
they can be specified in oprofilefs.
An updated oprofile daemon can then make use of this to set them.
v2: Write back masked extra value to variable.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
arch/x86/oprofile/nmi_int.c | 5 +++++
arch/x86/oprofile/op_counter.h | 1 +
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index e2b7b0c..ee165f1 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -49,6 +49,10 @@ u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
val |= counter_config->user ? ARCH_PERFMON_EVENTSEL_USR : 0;
val |= counter_config->kernel ? ARCH_PERFMON_EVENTSEL_OS : 0;
val |= (counter_config->unit_mask & 0xFF) << 8;
+ counter_config->extra &= (ARCH_PERFMON_EVENTSEL_INV |
+ ARCH_PERFMON_EVENTSEL_EDGE |
+ ARCH_PERFMON_EVENTSEL_CMASK);
+ val |= counter_config->extra;
event &= model->event_mask ? model->event_mask : 0xFF;
val |= event & 0xFF;
val |= (event & 0x0F00) << 24;
@@ -440,6 +444,7 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
+ oprofilefs_create_ulong(sb, dir, "extra", &counter_config[i].extra);
}
return 0;
diff --git a/arch/x86/oprofile/op_counter.h b/arch/x86/oprofile/op_counter.h
index e28398d..0b7b7b1 100644
--- a/arch/x86/oprofile/op_counter.h
+++ b/arch/x86/oprofile/op_counter.h
@@ -22,6 +22,7 @@ struct op_counter_config {
unsigned long kernel;
unsigned long user;
unsigned long unit_mask;
+ unsigned long extra;
};
extern struct op_counter_config counter_config[];
--
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