From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by sourceware.org (Postfix) with ESMTPS id 6068038582AF for ; Mon, 20 Jun 2022 08:04:45 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 6068038582AF X-IronPort-AV: E=McAfee;i="6400,9594,10380"; a="279883279" X-IronPort-AV: E=Sophos;i="5.92,306,1650956400"; d="scan'208";a="279883279" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2022 01:04:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.92,306,1650956400"; d="scan'208";a="614300386" Received: from scymds01.sc.intel.com ([10.148.94.138]) by orsmga008.jf.intel.com with ESMTP; 20 Jun 2022 01:04:44 -0700 Received: from shliclel314.sh.intel.com (shliclel314.sh.intel.com [10.239.236.214]) by scymds01.sc.intel.com with ESMTP id 25K84gVO017604; Mon, 20 Jun 2022 01:04:42 -0700 From: Haochen Jiang To: gcc-patches@gcc.gnu.org Cc: ubizjak@gmail.com, hongtao.liu@intel.com, "Jiang, Haochen" Subject: [PATCH] i386: Add syscall to enable AMX for latest kernels Date: Mon, 20 Jun 2022 16:04:42 +0800 Message-Id: <20220620080442.735284-1-haochen.jiang@intel.com> X-Mailer: git-send-email 2.18.2 X-Spam-Status: No, score=-12.6 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Jun 2022 08:04:52 -0000 From: "Jiang, Haochen" Hi all, We need syscall to enable AMX for kernels>=5.4. It is missing in current amx tests, which will cause test fail. This patch aims to add them to fix this bug. BRs, Haochen gcc/testsuite/ChangeLog: * gcc.target/i386/amx-check.h (request_perm_xtile_data): New function to check if AMX is usable and enable AMX. (main): Run test if AMX is usable. --- gcc/testsuite/gcc.target/i386/amx-check.h | 24 +++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/gcc/testsuite/gcc.target/i386/amx-check.h b/gcc/testsuite/gcc.target/i386/amx-check.h index 434b0e59703..92ed8669304 100644 --- a/gcc/testsuite/gcc.target/i386/amx-check.h +++ b/gcc/testsuite/gcc.target/i386/amx-check.h @@ -4,11 +4,22 @@ #include #include #include +#include +#include #ifdef DEBUG #include #endif #include "cpuid.h" +#define XFEATURE_XTILECFG 17 +#define XFEATURE_XTILEDATA 18 +#define XFEATURE_MASK_XTILECFG (1 << XFEATURE_XTILECFG) +#define XFEATURE_MASK_XTILEDATA (1 << XFEATURE_XTILEDATA) +#define XFEATURE_MASK_XTILE (XFEATURE_MASK_XTILECFG | XFEATURE_MASK_XTILEDATA) + +#define ARCH_GET_XCOMP_PERM 0x1022 +#define ARCH_REQ_XCOMP_PERM 0x1023 + /* TODO: The tmm emulation is temporary for current AMX implementation with no tmm regclass, should be changed in the future. */ @@ -44,6 +55,18 @@ typedef struct __tile /* Stride (colum width in byte) used for tileload/store */ #define _STRIDE 64 +/* We need syscall to use amx functions */ +int request_perm_xtile_data() +{ + unsigned long bitmask; + + if (syscall (SYS_arch_prctl, ARCH_REQ_XCOMP_PERM, XFEATURE_XTILEDATA) || + syscall (SYS_arch_prctl, ARCH_GET_XCOMP_PERM, &bitmask)) + return 0; + + return (bitmask & XFEATURE_MASK_XTILE) != 0; +} + /* Initialize tile config by setting all tmm size to 16x64 */ void init_tile_config (__tilecfg_u *dst) { @@ -186,6 +209,7 @@ main () #ifdef AMX_BF16 && __builtin_cpu_supports ("amx-bf16") #endif + && request_perm_xtile_data () ) { DO_TEST (); -- 2.18.2