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perf: fix invalid bit in diagnostic entry 

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: 7e75fc3ff4 ("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>
This commit is contained in:
Thomas Richter 2018-05-08 07:53:39 +02:00 committed by Martin Schwidefsky
parent 4bbaf2584b
commit 3c0a83b14e
1 changed files with 1 additions and 1 deletions
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2
arch/s390/include/asm/cpu_mf.h
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@ -113,7 +113,7 @@ struct hws_basic_entry {
struct hws_diag_entry { struct hws_diag_entry {
unsigned int def:16; /* 0-15 Data Entry Format */ 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 */ unsigned int I:1; /* 31 entry valid or invalid */
u8 data[]; /* Machine-dependent sample data */ u8 data[]; /* Machine-dependent sample data */
} __packed; } __packed;