diff options
Diffstat (limited to 'src/checksum/zseries/crc32-s390x.c')
| -rw-r--r-- | src/checksum/zseries/crc32-s390x.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/src/checksum/zseries/crc32-s390x.c b/src/checksum/zseries/crc32-s390x.c index f77d6768d42..28b46594220 100644 --- a/src/checksum/zseries/crc32-s390x.c +++ b/src/checksum/zseries/crc32-s390x.c @@ -6,8 +6,20 @@ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> * */ +#include "wt_internal.h" + #include <sys/types.h> #include <endian.h> + +#if defined(HAVE_CRC32_HARDWARE) + +#include <sys/auxv.h> + +/* RHEL 7 has kernel support, but does not define this constant in the lib c headers. */ +#ifndef HWCAP_S390_VX +#define HWCAP_S390_VX 2048 +#endif + #include "crc32-s390x.h" #include "slicing-consts.h" @@ -69,8 +81,6 @@ unsigned int __wt_crc32c_le(unsigned int crc, const unsigned char *buf, size_t l /* Main CRC-32 functions */ DEFINE_CRC32_VX(__wt_crc32c_le_vx, __wt_crc32c_le_vgfm_16, __wt_crc32c_le) -#include "wt_internal.h" - /* * __wt_checksum_hw -- * WiredTiger: return a checksum for a chunk of memory. @@ -81,6 +91,8 @@ __wt_checksum_hw(const void *chunk, size_t len) return (~__wt_crc32c_le_vx(0xffffffff, chunk, len)); } +#endif + /* * __wt_checksum_init -- * WiredTiger: detect CRC hardware and set the checksum function. @@ -89,8 +101,14 @@ void __wt_checksum_init(void) { #if defined(HAVE_CRC32_HARDWARE) - __wt_process.checksum = __wt_checksum_hw; -#else + unsigned long caps = getauxval(AT_HWCAP); + + if (caps & HWCAP_S390_VX) + __wt_process.checksum = __wt_checksum_hw; + else + __wt_process.checksum = __wt_checksum_sw; + +#else /* !HAVE_CRC32_HARDWARE */ __wt_process.checksum = __wt_checksum_sw; #endif } |