lkml.org 
[lkml]   [2018]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.4 071/124] s390/cpum_sf: Add data entry sizes to sampling trailer entry
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Richter <tmricht@linux.ibm.com>

[ Upstream commit 77715b7ddb446bd39a06f3376e85f4bb95b29bb8 ]

The CPU Measurement sampling facility creates a trailer entry for each
Sample-Data-Block of stored samples. The trailer entry contains the sizes
(in bytes) of the stored sampling types:
- basic-sampling data entry size
- diagnostic-sampling data entry size
Both sizes are 2 bytes long.

This patch changes the trailer entry definition to reflect this.

Fixes: fcc77f507333 ("s390/cpum_sf: Atomically reset trailer entry fields of sample-data-blocks")
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 | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/s390/include/asm/cpu_mf.h
+++ b/arch/s390/include/asm/cpu_mf.h
@@ -129,7 +129,9 @@ struct hws_trailer_entry {
unsigned int f:1; /* 0 - Block Full Indicator */
unsigned int a:1; /* 1 - Alert request control */
unsigned int t:1; /* 2 - Timestamp format */
- unsigned long long:61; /* 3 - 63: Reserved */
+ unsigned int :29; /* 3 - 31: Reserved */
+ unsigned int bsdes:16; /* 32-47: size of basic SDE */
+ unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
};
unsigned long long flags; /* 0 - 63: All indicators */
};

\
 
 \ /
  Last update: 2018-08-04 11:14    [W:0.494 / U:3.460 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site