From nobody Fri Nov 14 20:43:45 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1589940671; cv=none; d=zohomail.com; s=zohoarc; b=YzzNqFNLwT/3iIibIGyWU5hjL28X0+hs0TtlsFppnz7m4SQqDZYBu+YNzHNFDUzM90A+JZq0rNZUSKzDDbAm45SUGRIdW9WQQG9VeGU9qb+TrrBtgxToA7JU8k/G86YfZYc37+e3dkPAkY08bpQz7OOhB+gciDlzKBA0mT5mi5Q= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1589940671; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=p4PMv1vl99kjlMlt/K72vm+CRy75skfE3SR2Qzbz4mw=; b=EYAU/63nJEJbsuQjROIjslUcFhavksEJOQPkf6OukRz79Awey0zEihG9wCM4kCB+C/splpfYXm3FKAp0GQvAV9ot9xuIbM78j9nvWeW8Qaj9UyMTm3zJXAyaO0UxzT9E9C78V3hClRmLCTtcsLOizgF9aHPGS0/1N0nlyjHwEUc= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1589940671306319.5524191215417; Tue, 19 May 2020 19:11:11 -0700 (PDT) Received: from localhost ([::1]:55646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jbECM-00037N-2w for importer@patchew.org; Tue, 19 May 2020 22:11:10 -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 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 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 IronPort-SDR: h/Hyh45H8RrPC8jwFUTDGaY/9j/zyDXFtNnLH67lS3F6UKNhQ2ElXq1WiNmyTWFbPtGgHo0rJ9 NaK8V2SX6iHQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False 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" 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 (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" For CPUs support fast short REP MOV[CPUID.(EAX=3D7,ECX=3D0):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]= =3D { .type =3D CPUID_FEATURE_WORD, .feat_names =3D { 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 */ --=20 2.17.1