From patchwork Thu Apr 8 12:18:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Beulich X-Patchwork-Id: 12190887 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B274DC433ED for ; Thu, 8 Apr 2021 12:18:43 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 730B861106 for ; Thu, 8 Apr 2021 12:18:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 730B861106 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.107241.205001 (Exim 4.92) (envelope-from ) id 1lUTcF-0003g8-Q9; Thu, 08 Apr 2021 12:18:31 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 107241.205001; Thu, 08 Apr 2021 12:18:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lUTcF-0003g1-My; Thu, 08 Apr 2021 12:18:31 +0000 Received: by outflank-mailman (input) for mailman id 107241; Thu, 08 Apr 2021 12:18:30 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lUTcE-0003fC-Jo for xen-devel@lists.xenproject.org; Thu, 08 Apr 2021 12:18:30 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 671d1e7e-cda6-48b3-b1d9-f225f71af49d; Thu, 08 Apr 2021 12:18:27 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 30EAFAFCC; Thu, 8 Apr 2021 12:18:26 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 671d1e7e-cda6-48b3-b1d9-f225f71af49d X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1617884306; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rkX7CzUIHm8zyEM9IisY4rl2NOQycbZjijQaZgGhueY=; b=A3qqKzk4yj5DecWdzpWMWiGjXBkAHG2eQY9GoPQ8YZEw6TRe+qSR08w6Ug3tvkEQhsbE4x EzYLTROyPEv05yU8bKXTtkYiNrgU6+O1Ewny+iB4p8Xk8T9DHCE/WRpowrMHklYsWYGhei +tCHFYTufSnVc/TH+AzQnazB0tjlNYY= Subject: [PATCH 04/11] x86/HVM: avoid effectively open-coding xmalloc_array() From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , George Dunlap , Wei Liu , =?utf-8?q?R?= =?utf-8?q?oger_Pau_Monn=C3=A9?= , Paul Durrant References: Message-ID: Date: Thu, 8 Apr 2021 14:18:25 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US There is a difference in generated code: xmalloc_bytes() forces SMP_CACHE_BYTES alignment. I think we not only don't need this here, but actually don't want it. Signed-off-by: Jan Beulich --- a/xen/arch/x86/hvm/emulate.c +++ b/xen/arch/x86/hvm/emulate.c @@ -1924,7 +1924,7 @@ static int hvmemul_rep_movs( dgpa -= bytes - bytes_per_rep; /* Allocate temporary buffer. Fall back to slow emulation if this fails. */ - buf = xmalloc_bytes(bytes); + buf = xmalloc_array(char, bytes); if ( buf == NULL ) return X86EMUL_UNHANDLEABLE; @@ -2037,7 +2037,7 @@ static int hvmemul_rep_stos( for ( ; ; ) { bytes = *reps * bytes_per_rep; - buf = xmalloc_bytes(bytes); + buf = xmalloc_array(char, bytes); if ( buf || *reps <= 1 ) break; *reps >>= 1;