From patchwork Wed May 20 02:10:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chenyi Qiang X-Patchwork-Id: 11559169 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3B13D13B4 for ; Wed, 20 May 2020 02:10:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1A7FC2081A for ; Wed, 20 May 2020 02:10:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A7FC2081A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:55646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jbECA-00037N-Av for patchwork-qemu-devel@patchwork.kernel.org; Tue, 19 May 2020 22:10:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35588) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jbEAB-0007Ic-BK for qemu-devel@nongnu.org; Tue, 19 May 2020 22:08:55 -0400 Received: from mga18.intel.com ([134.134.136.126]:42318) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jbEA9-0004YD-0l for qemu-devel@nongnu.org; Tue, 19 May 2020 22:08:55 -0400 IronPort-SDR: h/Hyh45H8RrPC8jwFUTDGaY/9j/zyDXFtNnLH67lS3F6UKNhQ2ElXq1WiNmyTWFbPtGgHo0rJ9 NaK8V2SX6iHQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 May 2020 19:08:44 -0700 IronPort-SDR: jbgLJUTDTcQ4zsxCgmFLvH+6B90I1P/2uEfnVB8K8XemPST30lQ0UXGQ8zwz9Z46h0/C47kPYb 4x/+qAzAy6Vw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,412,1583222400"; d="scan'208";a="300299758" Received: from chenyi-pc.sh.intel.com ([10.239.159.72]) by orsmga008.jf.intel.com with ESMTP; 19 May 2020 19:08:42 -0700 From: Chenyi Qiang To: Paolo Bonzini , Richard Henderson , Eduardo Habkost Subject: [PATCH v4 2/5] target/i386: add fast short REP MOV support Date: Wed, 20 May 2020 10:10:04 +0800 Message-Id: <20200520021007.30649-3-chenyi.qiang@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200520021007.30649-1-chenyi.qiang@intel.com> References: <20200520021007.30649-1-chenyi.qiang@intel.com> Received-SPF: pass client-ip=134.134.136.126; envelope-from=chenyi.qiang@intel.com; helo=mga18.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/19 22:08:40 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xiaoyao Li , qemu-devel@nongnu.org, Robert Hoo Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" For CPUs support fast short REP MOV[CPUID.(EAX=7,ECX=0):EDX(bit4)], e.g Icelake and Tigerlake, expose it to the guest VM. Signed-off-by: Chenyi Qiang --- target/i386/cpu.c | 2 +- target/i386/cpu.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 2b653a0161..52f5aa5418 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -984,7 +984,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .type = CPUID_FEATURE_WORD, .feat_names = { NULL, NULL, "avx512-4vnniw", "avx512-4fmaps", - NULL, NULL, NULL, NULL, + "fsrm", NULL, NULL, NULL, NULL, NULL, "md-clear", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL /* pconfig */, NULL, diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 408392dbf6..142256017b 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -772,6 +772,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Multiply Accumulation Single Precision */ #define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) +/* Fast Short Rep Mov */ +#define CPUID_7_0_EDX_FSRM (1U << 4) /* Speculation Control */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Single Thread Indirect Branch Predictors */