4.17-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Richter tmricht@linux.ibm.com
[ 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 --- arch/s390/include/asm/cpu_mf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- 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;