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[PATCH v2] Support auxilliary vector components for cache geometries.
- From: Paul Clarke <pc at us dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Date: Thu, 23 Mar 2017 12:25:22 -0500
- Subject: [PATCH v2] Support auxilliary vector components for cache geometries.
- Authentication-results: sourceware.org; auth=none
- Reply-to: pc at us dot ibm dot com
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: Add auxvec identifiers from kernel
arch/powerpc/include/uapi/asm/auxvec.h.
---
v2: removed test case
elf/elf.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/elf/elf.h b/elf/elf.h
index 6d3b356..fff893d 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. */
--
2.1.4
Regards,
Paul Clarke, IBM