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>
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index 50640cc..a7aae24 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -406,6 +406,21 @@
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)