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| author | Yang Rong <rong.r.yang@intel.com> | 2015-12-28 10:40:14 +0800 |
|---|---|---|
| committer | Yang Rong <rong.r.yang@intel.com> | 2016-01-05 15:23:16 +0800 |
| commit | 31891068c8d57d28260dd2c7ef8ca4faf8cffe7e (patch) | |
| tree | 6b66b97042b1ce57fff7d0c0671889e08da2e99a | |
| parent | aecf78ef4cfc649e5faf9ef613567a5d98ff480e (diff) | |
| download | beignet-31891068c8d57d28260dd2c7ef8ca4faf8cffe7e.tar.gz | |
SKL: use the hw defautl value mocs index before linux 4.3.
From linux 4.3, kernel redefined the mocs table's value,
But before 4.3, still used the hw defautl value.
Signed-off-by: Yang Rong <rong.r.yang@intel.com>
Reviewed-by: Ruiling Song <ruiling.song@intel.com>
| -rw-r--r-- | src/intel/intel_gpgpu.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/intel/intel_gpgpu.c b/src/intel/intel_gpgpu.c index dfe2af38..b55e0751 100644 --- a/src/intel/intel_gpgpu.c +++ b/src/intel/intel_gpgpu.c @@ -26,6 +26,7 @@ #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> +#include <sys/utsname.h> #include <fcntl.h> #include <stddef.h> #include <errno.h> @@ -284,7 +285,20 @@ intel_gpgpu_get_cache_ctrl_gen9() { //Kernel-defined cache control registers 2: //L3CC: WB; LeCC: WB; TC: LLC/eLLC; - return (0x2 << 1); + int major = 0, minor = 0; + int mocs_index = 0x2; + + struct utsname buf; + uname(&buf); + sscanf(buf.release, "%d.%d", &major, &minor); + //From linux 4.3, kernel redefined the mocs table's value, + //But before 4.3, still used the hw defautl value. + if(strcmp(buf.sysname, "Linux") == 0 && + major == 4 && minor < 3) { /* linux kernel support skl from 4.x, so check from 4 */ + mocs_index = 0x9; + } + + return (mocs_index << 1); } static void |