From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CAFA733CE82; Wed, 17 Dec 2025 12:07:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765973274; cv=none; b=a3+Hk9Q+zHOMl5z0/F+GdfAccvH3eZtfmwj2V6LIzwa7GS3dQkUy+ItnUyhXsmMvEm6p1JVBGBybopqNTRWPe3P83nkNVafcwKD9Xrl4VD7KqUI1NJ1qDlVrjNqBR3+D72kUY6u8WjH9N1zPerT1X2N4xK7PX2ZoKN0ZtRnE00Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765973274; c=relaxed/simple; bh=SB6bVlxIdKN3Jilw0/lGuiOTBaycEjpGHXmweO3ggbA=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IY6zTUHsgJbCRfVY+iaFJtedYZasvJ4psM0vF4lTvxp/nI2LWxdIFN2IWTlUgNT/RN5B9Fx48bJs1dMxhQ2zy36YgIOaW9mcznaRxLt5F/JWYjmMkTMMWjRR4ToHvEjYl678N0lZjSTySDTzBIX0R5Ft2nSG1DejdsKIZ0DhDaQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.224.83]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4dWXbs59nkzJ46Cy; Wed, 17 Dec 2025 20:07:21 +0800 (CST) Received: from dubpeml100005.china.huawei.com (unknown [7.214.146.113]) by mail.maildlp.com (Postfix) with ESMTPS id 09CB740565; Wed, 17 Dec 2025 20:07:51 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml100005.china.huawei.com (7.214.146.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Wed, 17 Dec 2025 12:07:49 +0000 Date: Wed, 17 Dec 2025 12:07:48 +0000 From: Jonathan Cameron To: Dave Jiang CC: Smita Koralahalli , , , , , , Alison Schofield , Vishal Verma , Ira Weiny , Dan Williams , Yazen Ghannam , Davidlohr Bueso , "Matthew Wilcox" , Jan Kara , "Rafael J . Wysocki" , Len Brown , Pavel Machek , Li Ming , Jeff Johnson , Ying Huang , Yao Xingtao , Peter Zijlstra , Greg KH , "Nathan Fontenot" , Terry Bowman , Robert Richter , Benjamin Cheatham , Zhijian Li , "Borislav Petkov" , Ard Biesheuvel Subject: Re: [PATCH v4 3/9] dax/hmem: Gate Soft Reserved deferral on DEV_DAX_CXL Message-ID: <20251217120748.0000581e@huawei.com> In-Reply-To: References: <20251120031925.87762-1-Smita.KoralahalliChannabasappa@amd.com> <20251120031925.87762-4-Smita.KoralahalliChannabasappa@amd.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml500010.china.huawei.com (7.191.174.240) To dubpeml100005.china.huawei.com (7.214.146.113) On Tue, 2 Dec 2025 16:32:24 -0700 Dave Jiang wrote: > On 11/19/25 8:19 PM, Smita Koralahalli wrote: > > From: Dan Williams > > > > Replace IS_ENABLED(CONFIG_CXL_REGION) with IS_ENABLED(CONFIG_DEV_DAX_CXL) > > so that HMEM only defers Soft Reserved ranges when CXL DAX support is > > enabled. This makes the coordination between HMEM and the CXL stack more > > precise and prevents deferral in unrelated CXL configurations. > > > > Signed-off-by: Dan Williams > > Signed-off-by: Smita Koralahalli > > Reviewed-by: Dave Jiang > --- Something odd happened with that tag from Dave so that might need manual application if you use b4 or similar. This seems sensible to me. Reviewed-by: Jonathan Cameron > > drivers/dax/hmem/hmem.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c > > index 02e79c7adf75..c2c110b194e5 100644 > > --- a/drivers/dax/hmem/hmem.c > > +++ b/drivers/dax/hmem/hmem.c > > @@ -66,7 +66,7 @@ static int hmem_register_device(struct device *host, int target_nid, > > long id; > > int rc; > > > > - if (IS_ENABLED(CONFIG_CXL_REGION) && > > + if (IS_ENABLED(CONFIG_DEV_DAX_CXL) && > > region_intersects(res->start, resource_size(res), IORESOURCE_MEM, > > IORES_DESC_CXL) != REGION_DISJOINT) { > > dev_dbg(host, "deferring range to CXL: %pr\n", res); > >