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authorPaul Clarke <pc@us.ibm.com>2017-04-11 11:19:28 -0300
committerTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2017-04-11 14:05:54 -0300
commitd031600dd2e8381e9cd2ccc20c4ce94a04f04eaf (patch)
tree8c07faebca266325a4afff871eff013c8361298a
parenta42478b7bf10e9f890466c91280d9b24908ca980 (diff)
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Support auxilliary vector components for cache geometries.
Add support to getauxval() for new types to get L1, L2, L3 cache sizes,
cache line sizes, and cache associativities.  The new types for
getauxval() were added in the stream for Linux kernel v4.11 in commit
98a5f361b8625c6f4841d6ba013bbf0e80d08147.

	* elf/elf.h (AT_L1I_CACHESIZE, AT_L1I_CACHEGEOMETRY, AT_L1D_CACHESIZE,
	AT_L1D_CACHEGEOMETRY, AT_L2_CACHESIZE, AT_L2_CACHEGEOMETRY,
	AT_L3_CACHESIZE, AT_L3_CACHEGEOMETRY): New.  Add auxvec
	identifiers from kernel arch/powerpc/include/uapi/asm/auxvec.h.
-rw-r--r--ChangeLog7
-rw-r--r--elf/elf.h12
2 files changed, 19 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 0dd3057200..5df70040e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2017-04-11  Paul Clarke  <pc@us.ibm.com>
+
+	* elf/elf.h (AT_L1I_CACHESIZE, AT_L1I_CACHEGEOMETRY, AT_L1D_CACHESIZE,
+	AT_L1D_CACHEGEOMETRY, AT_L2_CACHESIZE, AT_L2_CACHEGEOMETRY,
+	AT_L3_CACHESIZE, AT_L3_CACHEGEOMETRY): New.  Add auxvec
+	identifiers from kernel arch/powerpc/include/uapi/asm/auxvec.h.
+
 2017-04-11  Florian Weimer  <fweimer@redhat.com>
 	    Zack Weinberg  <zackw@panix.com>
 
diff --git a/elf/elf.h b/elf/elf.h
index 6d3b356f14..fff893d433 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -1170,6 +1170,18 @@ typedef struct
 #define AT_L2_CACHESHAPE	36
 #define AT_L3_CACHESHAPE	37
 
+/* Shapes of the caches, with more room to describe them.
+   *GEOMETRY are comprised of cache line size in bytes in the bottom 16 bits
+   and the cache associativity in the next 16 bits.  */
+#define AT_L1I_CACHESIZE	40
+#define AT_L1I_CACHEGEOMETRY	41
+#define AT_L1D_CACHESIZE	42
+#define AT_L1D_CACHEGEOMETRY	43
+#define AT_L2_CACHESIZE		44
+#define AT_L2_CACHEGEOMETRY	45
+#define AT_L3_CACHESIZE		46
+#define AT_L3_CACHEGEOMETRY	47
+
 /* Note section contents.  Each entry in the note section begins with
    a header of a fixed form.  */