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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2013-12-12 17:38:50 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-12-16 14:37:58 +0100
commit443d4beb823d4dccaaf964b59df9dd38b4d6aae7 (patch)
treef11cddd99fb9c8dced567a2577c43a271d6a29ac /arch/s390/include/asm/cpu_mf.h
parentfcc77f507333776eaa336ab4ff49c23422f53703 (diff)
downloadlinux-443d4beb823d4dccaaf964b59df9dd38b4d6aae7.tar.gz
s390/cpum_sf: Add helper to read TOD from trailer entries
The trailer entry contains a timestamp of the time when the sample-data-block became full. The timestamp specifies a TOD (time-of-day) value in either the STCK or STCKE format. Provide a helper function to return the TOD value depending on the setting of time format indicator. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/cpu_mf.h')
-rw-r--r--arch/s390/include/asm/cpu_mf.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h
index b0b3059b8d64..09dc5facc0bc 100644
--- a/arch/s390/include/asm/cpu_mf.h
+++ b/arch/s390/include/asm/cpu_mf.h
@@ -125,8 +125,7 @@ struct hws_trailer_entry {
unsigned long long flags; /* 0 - 63: All indicators */
};
unsigned long long overflow; /* 64 - sample Overflow count */
- unsigned long long timestamp; /* 16 - time-stamp */
- unsigned long long timestamp1; /* */
+ unsigned char timestamp[16]; /* 16 - 31 timestamp */
unsigned long long reserved1; /* 32 -Reserved */
unsigned long long reserved2; /* */
unsigned long long progusage1; /* 48 - reserved for programming use */
@@ -232,6 +231,17 @@ static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
#define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
+/* Return TOD timestamp contained in an trailer entry */
+static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
+{
+ /* TOD in STCKE format */
+ if (te->t)
+ return *((unsigned long long *) &te->timestamp[1]);
+
+ /* TOD in STCK format */
+ return *((unsigned long long *) &te->timestamp[0]);
+}
+
/* Return pointer to trailer entry of an sample data block */
static inline unsigned long *trailer_entry_ptr(unsigned long v)
{