diff options
| -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 |