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authorRobert Richter <robert.richter@amd.com>2009-06-03 22:54:56 +0400
committerRobert Richter <robert.richter@amd.com>2009-06-11 22:16:00 +0400
commit51563a0e5650d0d76539625388d72d62b34c726e (patch)
tree17148f56578af8f7d7d67491f8b7eb05d99acdd9 /drivers/oprofile
parentc572ae4efd1b0a5cc76c5e6aae05c1b182b6a69c (diff)
downloadlinux-51563a0e5650d0d76539625388d72d62b34c726e.tar.xz
x86/oprofile: introduce oprofile_add_data64()
The IBS implemention writes 64 bit register values to the cpu buffer by writing two 32 values using oprofile_add_data(). This patch introduces oprofile_add_data64() to write a single 64 bit value to the buffer. Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile')
-rw-r--r--drivers/oprofile/cpu_buffer.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index 50640cc5eef2..a7aae24f2889 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -406,6 +406,21 @@ int oprofile_add_data(struct op_entry *entry, unsigned long val)
return op_cpu_buffer_add_data(entry, val);
}
+int oprofile_add_data64(struct op_entry *entry, u64 val)
+{
+ if (!entry->event)
+ return 0;
+ if (op_cpu_buffer_get_size(entry) < 2)
+ /*
+ * the function returns 0 to indicate a too small
+ * buffer, even if there is some space left
+ */
+ return 0;
+ if (!op_cpu_buffer_add_data(entry, (u32)val))
+ return 0;
+ return op_cpu_buffer_add_data(entry, (u32)(val >> 32));
+}
+
int oprofile_write_commit(struct op_entry *entry)
{
if (!entry->event)