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spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=glmXbc+pwXkEkBwx0IrBVP6cHdvjkgZ8tsP4AEr4lIc=; b=hFu4KpI++Qm2FS1G1v4gPGB1OBgmmG24sB645AEjuzzHOwTEOIhxwSY8vQzVJg12iRlaNXBJKlUH8O/XdkIya4/GW/+QwwU7pD7d1TAM7TyyuzY+CKa3yWtAiLPnz7QzQu0TebqvQ4Eqtm7bQwxB95jrjfi0m3M8dAeDDUiZxkA= From: Rahul Singh To: Julien Grall CC: "xen-devel@lists.xenproject.org" , Bertrand Marquis , Stefano Stabellini , Volodymyr Babchuk Subject: Re: [PATCH v2 3/8] xen/arm: revert patch related to XArray Thread-Topic: [PATCH v2 3/8] xen/arm: revert patch related to XArray Thread-Index: AQHWxBX3rCwwjKDJrkuX4ODVkz/db6nj2uAAgAGEjAA= Date: Thu, 3 Dec 2020 12:57:05 +0000 Message-ID: <2B1A7090-F07C-4DF9-BDEC-6E5A2D715DB4@arm.com> References: <612c1adabc1c26a539abf0dc05ea20b51e66e85f.1606406359.git.rahul.singh@arm.com> <266b918c-b9c4-e067-b8dc-4e879c913af5@xen.org> In-Reply-To: <266b918c-b9c4-e067-b8dc-4e879c913af5@xen.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Authentication-Results-Original: xen.org; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Dec 2020 12:57:25.1473 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 59d3e2e9-1b2d-4458-d15e-08d8978afb74 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT035.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB4224 Hello Julien, > On 2 Dec 2020, at 1:46 pm, Julien Grall wrote: >=20 > Hi Rahul, >=20 > On 26/11/2020 17:02, Rahul Singh wrote: >> XArray is not implemented in XEN revert the patch that introduce the >> XArray code in SMMUv3 driver. >=20 > Similar to the atomic revert, you are explaining why the revert but not t= he consequences. I think this is quite important to have them outline in th= e commit message as it looks like it means the SMMU driver would not scale. Ok I will add. >=20 >> Once XArray is implemented in XEN this patch can be added in XEN. >=20 > What's the plan for that? As of now there is no plan for Xarray from our side. =20 Do we have requirement for Xarray implementation in XEN ? Regards, Rahul >=20 > Cheers, >=20 > --=20 > Julien Grall