From nobody Tue Feb 10 05:27:28 2026 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) (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 4CFAF35B142 for ; Fri, 9 Jan 2026 12:45:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767962703; cv=none; b=timjyOshigoe7kDlb1SVWR6EEIqa/g1wexmO0jwMii1RfFj7vclshTe2tl1gXoRoWKf0v2oM7dgmVevgzjqQEzlzD/hvcV3o6jxuPe9/Ela0HAOaqwMkfhkMSwMKmTKZ7ZJmZnsL/CTO7V8ku41Ljts2yxqRYyMF4vGmBGuyJfY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767962703; c=relaxed/simple; bh=KM24CjqoMDDe8npGaVVcWzJfF1oRGcGBwVm4lwATVU0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:MIME-Version: Content-Type:References; b=cJ8N2QXUcquqdQE/MtK+MUYIxt12XhHpERH3w3yFcIv440a1E8+daPpGZOS39envA6sQzUvu+0y1lsmbpk3r6IbSs69yi3h6CtdDMn6XEUH/NqXp9ID6bMp5PCGh0zYJB57kVSwtYBbuq66oGcp9Zrib0Md93pA0LtqCdEnFHos= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=rwzLuElc; arc=none smtp.client-ip=203.254.224.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="rwzLuElc" Received: from epcas5p1.samsung.com (unknown [182.195.41.39]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20260109124459epoutp025de2dae2cb1b42714fc7d8517fd753f3~JELVIRmT72083220832epoutp02S for ; Fri, 9 Jan 2026 12:44:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20260109124459epoutp025de2dae2cb1b42714fc7d8517fd753f3~JELVIRmT72083220832epoutp02S DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1767962699; bh=XCGgkoYzmHDoS6RA8zyIHNIs3/xy9sGJph2JjO1aG/Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rwzLuElchf4um3gbjXw2T0e7xhFzenW10+bmvcXK70aIZxCMyqkqQVa8PuwMIfQkc rqLqVrqM4kFBZr9EGbwxjzN9SU+0+XtxHT/GdEE8yASSybgqWYPiXp7ppLQ+Mv6mxn HYzgR0lm2ryC5pnPuDkaFX2xi5GUu+bq3R+NogEw= Received: from epsnrtp02.localdomain (unknown [182.195.42.154]) by epcas5p4.samsung.com (KnoxPortal) with ESMTPS id 20260109124458epcas5p461ba1190da42dc4a5516dc925a4226da~JELUeBJdi1264312643epcas5p4e; Fri, 9 Jan 2026 12:44:58 +0000 (GMT) Received: from epcas5p4.samsung.com (unknown [182.195.38.88]) by epsnrtp02.localdomain (Postfix) with ESMTP id 4dnhLf0l8jz2SSKX; Fri, 9 Jan 2026 12:44:58 +0000 (GMT) Received: from epsmtip1.samsung.com (unknown [182.195.34.30]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20260109124457epcas5p2c2e8b5dfb9bfc0bc2aa0fcbe9e3122f3~JELTONU5c0900009000epcas5p2r; Fri, 9 Jan 2026 12:44:57 +0000 (GMT) Received: from test-PowerEdge-R740xd.samsungds.net (unknown [107.99.41.79]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20260109124455epsmtip150b6494316438851410b875002b7c69a~JELRt94d50972509725epsmtip1P; Fri, 9 Jan 2026 12:44:55 +0000 (GMT) From: Neeraj Kumar To: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, gost.dev@samsung.com Cc: a.manzanares@samsung.com, vishak.g@samsung.com, neeraj.kernel@gmail.com, Neeraj Kumar Subject: [PATCH V5 02/17] nvdimm/label: CXL labels skip the need for 'interleave-set cookie' Date: Fri, 9 Jan 2026 18:14:22 +0530 Message-Id: <20260109124437.4025893-3-s.neeraj@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260109124437.4025893-1-s.neeraj@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CMS-MailID: 20260109124457epcas5p2c2e8b5dfb9bfc0bc2aa0fcbe9e3122f3 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20260109124457epcas5p2c2e8b5dfb9bfc0bc2aa0fcbe9e3122f3 References: <20260109124437.4025893-1-s.neeraj@samsung.com> CXL LSA v2.1 utilizes the region labels stored in the LSA for interleave set configuration instead of interleave-set cookie used in previous LSA versions. As interleave-set cookie is not required for CXL LSA v2.1 format so skip its usage for CXL LSA 2.1 format Reviewed-by: Jonathan Cameron Acked-by: Ira Weiny Reviewed-by: Dave Jiang Signed-off-by: Neeraj Kumar --- drivers/nvdimm/namespace_devs.c | 8 +++++++- drivers/nvdimm/region_devs.c | 10 ++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_dev= s.c index a5edcacfe46d..43fdb806532e 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1678,7 +1678,13 @@ static struct device *create_namespace_pmem(struct n= d_region *nd_region, int rc =3D 0; u16 i; =20 - if (cookie =3D=3D 0) { + /* + * CXL LSA v2.1 utilizes the region label stored in the LSA for + * interleave set configuration. Whereas EFI LSA v1.1 & v1.2 + * utilizes interleave-set cookie. i.e, CXL labels skip the + * need for 'interleave-set cookie' + */ + if (!ndd->cxl && cookie =3D=3D 0) { dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); return ERR_PTR(-ENXIO); } diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 1220530a23b6..77f36a585f13 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -841,6 +841,16 @@ u64 nd_region_interleave_set_cookie(struct nd_region *= nd_region, if (!nd_set) return 0; =20 + /* + * CXL LSA v2.1 utilizes the region label stored in the LSA for + * interleave set configuration. Whereas EFI LSA v1.1 & v1.2 + * utilizes interleave-set cookie. i.e, CXL labels skip the + * need for 'interleave-set cookie' + */ + if (nsindex && __le16_to_cpu(nsindex->major) =3D=3D 2 + && __le16_to_cpu(nsindex->minor) =3D=3D 1) + return 0; + if (nsindex && __le16_to_cpu(nsindex->major) =3D=3D 1 && __le16_to_cpu(nsindex->minor) =3D=3D 1) return nd_set->cookie1; --=20 2.34.1