From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 6083DC02188 for ; Mon, 27 Jan 2025 10:04:15 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.877555.1287684 (Exim 4.92) (envelope-from ) id 1tcLyN-0006TN-Lq; Mon, 27 Jan 2025 10:04:03 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 877555.1287684; Mon, 27 Jan 2025 10:04:03 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tcLyN-0006TG-JL; Mon, 27 Jan 2025 10:04:03 +0000 Received: by outflank-mailman (input) for mailman id 877555; Mon, 27 Jan 2025 10:04:02 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tcLyM-0006T8-Kq for xen-devel@lists.xenproject.org; Mon, 27 Jan 2025 10:04:02 +0000 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [2607:f8b0:4864:20::633]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 07a73085-dc96-11ef-a0e6-8be0dac302b0; Mon, 27 Jan 2025 11:04:01 +0100 (CET) Received: by mail-pl1-x633.google.com with SMTP id d9443c01a7336-2162c0f6a39so93284765ad.0 for ; Mon, 27 Jan 2025 02:04:01 -0800 (PST) Received: from localhost ([84.78.159.3]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ac495d5790dsm5995332a12.60.2025.01.27.02.03.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jan 2025 02:03:59 -0800 (PST) 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: 07a73085-dc96-11ef-a0e6-8be0dac302b0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1737972239; x=1738577039; darn=lists.xenproject.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=RwNshmp+CHvpCBavfOKUzNpKUjOofXHONCaz+lyP0a4=; b=iPwd2XbCKLww86PbOVXChd74hQkq/FwV+eFD49ooGaeou4k8v8Kk9+PEhtI88hyJHZ 8R1JzJWYYFNH8zGpH4cLDPwnvhwcLyvVLKC/ubobtyFp1WgOFpV8uO5aiggfC3gXEOPI zA0sqvT3rhfw82/xX+Yb1OzAUxiioTIzd5/78= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1737972239; x=1738577039; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=RwNshmp+CHvpCBavfOKUzNpKUjOofXHONCaz+lyP0a4=; b=dCfRgOZFpB543xsxcCgbh/NHUrO4JmPBME7DF2dNlzqFqIdXOmXdTqfeRANJpT672U oSiBo4HvfpxsPIDSmgg5iW9qkVcWOciRXCyg/C540a//jnGYkhlYDRGP8uU0+Xe0u4dg DR1sDtlWXgfCnkcbVWPjyOax11GarslzoPjo6yuzUjU/pUqdFc0E5Glbq9uJjeuk4II5 8100bR7DQwKaKeuaBgZglqCw6vCNahgNkB0EsgMM7oVY6gg8m7sUIW2q+RmiJkM79d/j CAkdlw5fN72a9YIEOLcntQ8Zvoo9oyG4Sz+jSr5joBylKMQJBCEDQiSZCrn/yPlHNWTI hW9A== X-Forwarded-Encrypted: i=1; AJvYcCXMFfrBmaRcBTU/Yplzx/gil0PUAjHMa2cD68zbucU8yi2kYDUyEzb7wH0s4wYiUqci1kLTEWy4kcM=@lists.xenproject.org X-Gm-Message-State: AOJu0Yyv3c4aPQgAt3U5SQql/05YX9qpN5Y1194pNMmnMkrVnxIRuhBr YlTUjpvJokrBv80mVOjvUxZlE1nAhjSfyOTuIzo2KHwQmgRVs23dFgrhgyC2O0o= X-Gm-Gg: ASbGncstz1LndFBDq2WVAEnzZjeicIWu43PKro8uIPTy2wbpptUjeKjiqYSb+D0J53C pBm4djDc6PWgN8WTgvoK2tIU4Xop2ms/RnB/94fZPO12r0Va1LI/ZHAQ3yiD+C2UNxvSVo/cQik F+h9MsHPpYYCe6XERQIT4f4GWFyDzJ+9oCRp/6+R3+02qBh3M7ZsWwzWb4+rT59IoAHCCdURg6h WtIZOUch3f/52qPZoyaG+yti7oEIqqdYMsR2zPsq3X5xTXwCcujrQhOzeb8BTL9+B+ncnRjBZJE 1oqycW3s8/nYOwg= X-Google-Smtp-Source: AGHT+IELQ3FPsKcgrjAUYcZujAx4M8QxjWZzSaer374cC+eJyajOzfemCBPayPDLRw3ihpaAqbt3VA== X-Received: by 2002:a05:6a21:8ccc:b0:1e3:c763:74d4 with SMTP id adf61e73a8af0-1eb76a38d2cmr19926285637.0.1737972239674; Mon, 27 Jan 2025 02:03:59 -0800 (PST) Date: Mon, 27 Jan 2025 11:03:53 +0100 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Cc: Teddy Astie , Andrew Cooper , xen-devel@lists.xenproject.org Subject: Re: [PATCH v2 1/5] x86/iommu: check for CMPXCHG16B when enabling IOMMU Message-ID: References: <20250124120112.56678-1-roger.pau@citrix.com> <20250124120112.56678-2-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Mon, Jan 27, 2025 at 10:51:29AM +0100, Jan Beulich wrote: > On 24.01.2025 13:01, Roger Pau Monne wrote: > > From: Teddy Astie > > > > All hardware with VT-d/AMD-Vi has CMPXCHG16B support. Check this at > > initialisation time, and remove the effectively-dead logic for the > > non-cx16 case. > > Nit: There's nothing being removed here, so I expect the 2nd half of the > sentence wants dropping. Yes, that was a copy & paste from the following patch. Will drop the last part of the sentence. Thanks, Roger.