riscv: Get level 3 cache's information

RISC-V architecture extends the cache information for level 3 cache
in AUX vector in Linux v.6.1-rc1. This patch supports sysconf to get
the level 3 cache information.

Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/riscv/sysconf.c b/sysdeps/unix/sysv/linux/riscv/sysconf.c
index b768ebf..85b9faf 100644
--- a/sysdeps/unix/sysv/linux/riscv/sysconf.c
+++ b/sysdeps/unix/sysv/linux/riscv/sysconf.c
@@ -90,6 +90,12 @@ __sysconf (int name)
 	return sysconf_get_cache_associativity (AT_L2_CACHEGEOMETRY);
       case _SC_LEVEL2_CACHE_LINESIZE:
 	return sysconf_get_cache_linesize (AT_L2_CACHEGEOMETRY);
+      case _SC_LEVEL3_CACHE_SIZE:
+       return sysconf_get_cache_size (AT_L3_CACHESIZE);
+      case _SC_LEVEL3_CACHE_ASSOC:
+       return sysconf_get_cache_associativity (AT_L3_CACHEGEOMETRY);
+      case _SC_LEVEL3_CACHE_LINESIZE:
+       return sysconf_get_cache_linesize (AT_L3_CACHEGEOMETRY);
       default:
 	return linux_sysconf (name);
     }