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Tsirkin" Subject: RE: [PATCH] xen: introduce xen_vring_use_dma Thread-Topic: [PATCH] xen: introduce xen_vring_use_dma Thread-Index: AQHWSgTusARd8c8cRkWwDit233DtZajneYoAgACU6oCAAC7QAIAAEpoAgAAGSwCAAUK2gIABcSaAgAPk6cCAADgrAIAAAH5wgAAC0YCAAABHUA== Date: Mon, 29 Jun 2020 06:35:48 +0000 Message-ID: References: <20200624050355-mutt-send-email-mst@kernel.org> <20200624163940-mutt-send-email-mst@kernel.org> <20200624181026-mutt-send-email-mst@kernel.org> <20200626110629-mutt-send-email-mst@kernel.org> <20200629022124-mutt-send-email-mst@kernel.org> <20200629023225-mutt-send-email-mst@kernel.org> In-Reply-To: <20200629023225-mutt-send-email-mst@kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=nxp.com; x-originating-ip: [119.31.174.71] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: e07dc2d3-9155-49ce-2410-08d81bf6a91d x-ms-traffictypediagnostic: DB7PR04MB4764: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4714; x-forefront-prvs: 044968D9E1 x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: fK08amyxZaUi4JckED6/kpeUqMMw5buBVlalapbUcm+JSQK4QI84PEPgIYnkjkipS0xD9ABwB8ZcXtU/h/Y1OsDKtAVt4k4y7yMsyjn1Oa5BSHHepcIY7m4GIwnbEVNJJuthC4iVCMt+doQZU+ZAh26iGubJ/DeuGuOOXyNv4oM6PLJurQOiHffS1g7sdTacZiTsr+zppsy1C/3VBuisiyRVGG4KfeS0ux+2g8v3UsA7a2J/kgVZnBPHi2P5+10HIdKRjvpPPZ6yxmJFe43F3T3WeOuT1xkhR6Zi6ivDSCaAWVO+op7BLHTy95nrWHskMjgKfYQDmudAalEtAL7cIA== x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:DB6PR0402MB2760.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(366004)(396003)(346002)(376002)(136003)(39860400002)(66946007)(8936002)(8676002)(7416002)(9686003)(83380400001)(86362001)(44832011)(26005)(64756008)(2906002)(66556008)(6916009)(4326008)(66476007)(6506007)(66446008)(186003)(76116006)(4744005)(71200400001)(5660300002)(33656002)(478600001)(55016002)(316002)(7696005)(52536014)(54906003); DIR:OUT; SFP:1101; x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DB6PR0402MB2760.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e07dc2d3-9155-49ce-2410-08d81bf6a91d X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Jun 2020 06:35:48.4429 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: NmRyPfTWtT9tmgZRVPpOrkiU+mkQIwuldVriqMockyAX0T7RoLpPgZZtv1zNbSJXKaVO8ByTSQcBW7CQ4G2crw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR04MB4764 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "jgross@suse.com" , Stefano Stabellini , "konrad.wilk@oracle.com" , "jasowang@redhat.com" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "iommu@lists.linux-foundation.org" , dl-linux-imx , "xen-devel@lists.xenproject.org" , "boris.ostrovsky@oracle.com" , "linux-arm-kernel@lists.infradead.org" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" > Subject: Re: [PATCH] xen: introduce xen_vring_use_dma >=20 > On Mon, Jun 29, 2020 at 06:25:41AM +0000, Peng Fan wrote: > > > > > > Anyway, re-reading the last messages of the original thread > > > > > > [1], it looks like Peng had a clear idea on how to fix the gene= ral issue. > > > > > > Peng, what happened with that? > > > > > > > > We shrinked the rpmsg reserved area to workaround the issue. > > > > So still use the dma apis in rpmsg. > > > > > > > > But here I am going to address domu android trusty issue using virt= io. > > > > > > My suggestion is to first of all fix DMA API so it works properly. > > > > Could you please elaborate more details? > > > > You mean the DMA API usage of rpmsg? Or xen domu dma_ops? > > > > Thanks, > > Peng. >=20 > Not 100% sure but I think xen dma ops. Sorry to ask again, could you explain more details about what issues do you see of current xen ARM domu dma_ops?=20 Or Dom0 swiotlb xen dma_ops? Thanks, Pen.g >=20 > -- > MST