perf: fix invalid bit in diagnostic entry

[ Upstream commit 3c0a83b14ea71fef5ccc93a3bd2de5f892be3194 ]

The s390 CPU measurement facility sampling mode supports basic entries
and diagnostic entries. Each entry has a valid bit to indicate the
status of the entry as valid or invalid.

This bit is bit 31 in the diagnostic entry, but the bit mask definition
refers to bit 30.

Fix this by making the reserved field one bit larger.

Fixes: 7e75fc3ff4cf ("s390/cpum_sf: Add raw data sampling to support the diagnostic-sampling function")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h
index e698d98ed64c6df1c02b1c258c0c5c09d9b34935..ee64e624c511b2f9e24f2a2f2f09c712a9c99fa4 100644 (file)
--- a/arch/s390/include/asm/cpu_mf.h
+++ b/arch/s390/include/asm/cpu_mf.h
@@ -113,7 +113,7 @@ struct hws_basic_entry {
 
 struct hws_diag_entry {
        unsigned int def:16;        /* 0-15  Data Entry Format           */
-       unsigned int R:14;          /* 16-19 and 20-30 reserved          */
+       unsigned int R:15;          /* 16-19 and 20-30 reserved          */
        unsigned int I:1;           /* 31 entry valid or invalid         */
        u8           data[];        /* Machine-dependent sample data     */
 } __packed;