From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ssh248.corpemail.net (ssh248.corpemail.net [210.51.61.248]) (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 CE18D26AC3; Fri, 28 Mar 2025 03:26:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.51.61.248 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743132405; cv=none; b=mzuU/Z0gEyhodJZYQFCWWOzT1HwlvZnzsEsd/D3gJsc9nS2IkrIMuoDVvOsqHeHYcIDH0eHhTt/geJz36uD3nUIsE5CV+oi4dmSj+Nch7a/B8xMhfm5C0tZkA/OmxO42U85t0gttNJNHJusbFGRzV/K86ff77PHw8pa/YlRhkjA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743132405; c=relaxed/simple; bh=+apTMILyuzoKGjYoNsju5JB1rSx0wdhfEltS4X8Zfm4=; h=From:To:CC:Subject:Date:Message-ID:Content-Type:MIME-Version; b=S4S7hCk0COjyBpTQQxd1SU64XV8Dsl3xHPrFNzHJ3g6H0mK0zocR7fhDPR914vQCRA7WpcQh+mrXVAWDEBFRvnKcl7v3n0rZjiGojDVHdepdZpC2t81ay5S2dnEw8xXRtNN7mEkEbOUyzqF5/oZywHtrLK6GedpbOJcMhl03feQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=inspur.com; spf=pass smtp.mailfrom=inspur.com; arc=none smtp.client-ip=210.51.61.248 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=inspur.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=inspur.com Received: from jtjnmail201620.home.langchao.com by ssh248.corpemail.net ((D)) with ASMTP (SSL) id 202503281126270447; Fri, 28 Mar 2025 11:26:27 +0800 Received: from jtjnmail201622.home.langchao.com (10.100.2.22) by jtjnmail201620.home.langchao.com (10.100.2.20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Fri, 28 Mar 2025 11:26:27 +0800 Received: from jtjnmail201622.home.langchao.com ([fe80::15c3:8d74:3aa6:25f6]) by jtjnmail201622.home.langchao.com ([fe80::15c3:8d74:3aa6:25f6%7]) with mapi id 15.01.2507.039; Fri, 28 Mar 2025 11:26:27 +0800 From: =?utf-8?B?Qm8gTGl1ICjliJjms6IpLea1qua9ruS/oeaBrw==?= To: "kristen.c.accardi@intel.com" , "vinicius.gomes@intel.com" CC: "linux-crypto@vger.kernel.org" , "linux-kernel@vger.kernel.org" , =?utf-8?B?RG91IHpoaSBjaG9uZyBEb3UgKOeqpuW/l+WGsik=?= Subject: Intel IAA issue consultation Thread-Topic: Intel IAA issue consultation Thread-Index: AdufkEvJfAQaVtDyQmuUDCsR4b4QKA== Date: Fri, 28 Mar 2025 03:26:27 +0000 Message-ID: <7f9bf073f04d4ba6b0d98f6189d951bc@inspur.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: yes X-MS-TNEF-Correlator: Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=SHA1; boundary="----=_NextPart_000_0009_01DB9FD3.F1F08830" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 tUid: 20253281126274143ae6e0c39763f2d3a34275742cb0e X-Abuse-Reports-To: service@corp-email.com Abuse-Reports-To: service@corp-email.com X-Complaints-To: service@corp-email.com X-Report-Abuse-To: service@corp-email.com ------=_NextPart_000_0009_01DB9FD3.F1F08830 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Kristen: We recently encountered issues when using Intel IAA (In-Memory Analytics = Accelerator) for data decompression in the Linux kernel. Specifically, = while using the iaa_crypto driver, decompression fails when processing = large datasets composed of non-contiguous memory pages. Initially, we = attempted to address this by using scatterlists (SGLs), but = decompression still failed. After analyzing the iaa_crypto driver code, = we discovered that =E2=80=8Bnon-contiguous pages require enabling IOMMU = to map them into a single virtual contiguous memory block for the = device. However, while this approach worked for small numbers of = non-contiguous pages, it failed for larger quantities due to IOMMU = limitations in mapping fragmented pages into a unified virtual address = space. We would like to consult with you Is it possible to use iaa_crypto for decompression with = =E2=80=8Bnumerous non-contiguous pages? If yes, what modifications are required to resolve the IOMMU mapping = constraints? Thanks, Bo Liu. ------=_NextPart_000_0009_01DB9FD3.F1F08830 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIK8DCCA6Iw ggKKoAMCAQICEGPKUixTOHaaTcIS5DrQVuowDQYJKoZIhvcNAQELBQAwWTETMBEGCgmSJomT8ixk ARkWA2NvbTEYMBYGCgmSJomT8ixkARkWCGxhbmdjaGFvMRQwEgYKCZImiZPyLGQBGRYEaG9tZTES MBAGA1UEAxMJSU5TUFVSLUNBMB4XDTE3MDEwOTA5MjgzMFoXDTI3MDEwOTA5MzgyOVowWTETMBEG CgmSJomT8ixkARkWA2NvbTEYMBYGCgmSJomT8ixkARkWCGxhbmdjaGFvMRQwEgYKCZImiZPyLGQB GRYEaG9tZTESMBAGA1UEAxMJSU5TUFVSLUNBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAq+Q17xtjJLyp5hgXDie1r4DeNj76VUvbZNSywWU5zhx+e0Lu0kwcZ0T3KncZdgdWyqYvRJMQ /VVqX3gS4VxtLw3zBrg9kGuD0LfpH0cA2b0ZHpxRh5WapP14flcSh/lnawig29z44wfUEg43yTZO lOfPKos/Dm6wyrJtaPmD6AF7w4+vFZH0zMYfjQkSN/xGgS3OPBNAB8PTHM2sV+fFmnnlTFpyRg0O IIA2foALZvjIjNdUfp8kMGSh/ZVMfHqTH4eo+FcZPZ+t9nTaJQz9cSylw36+Ig6FGZHA/Zq+0fYy 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