Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Dexuan Cui <decui@microsoft.com>
To:     Wei Liu <wei.liu@kernel.org>,
        "Michael Kelley (LINUX)" <mikelley@microsoft.com>
CC:     KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        "lpieralisi@kernel.org" <lpieralisi@kernel.org>,
        "kw@linux.com" <kw@linux.com>, "robh@kernel.org" <robh@kernel.org>,
        "bhelgaas@google.com" <bhelgaas@google.com>,
        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] PCI: hv: Replace retarget_msi_interrupt_params with
 hyperv_pcpu_input_arg
Thread-Topic: [PATCH] PCI: hv: Replace retarget_msi_interrupt_params with
 hyperv_pcpu_input_arg
Thread-Index: AQHZal7BSHLzKGubX0KU07XgAcb7368mYESQgAIdKQCADJCQ8A==
Date:   Fri, 21 Apr 2023 01:36:45 +0000
Message-ID: <SA1PR21MB1335F2B44DBF989580A96DB7BF609@SA1PR21MB1335.namprd21.prod.outlook.com>
References: <20230408211112.15235-1-decui@microsoft.com>
 <BYAPR21MB1688F1E184FD1A914637EFB0D79A9@BYAPR21MB1688.namprd21.prod.outlook.com>
 <ZDdd0FZT9RHfg3cm@liuwe-devbox-debian-v2>
In-Reply-To: <ZDdd0FZT9RHfg3cm@liuwe-devbox-debian-v2>
Accept-Language: en-US
Content-Language: en-US
msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ActionId=29dd8a41-ea24-4f96-9c0b-3326879a8fa1;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ContentBits=0;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Method=Standard;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Name=Internal;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2023-04-21T01:34:07Z;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47;
authentication-results: dkim=none (message not signed)
 header.d=none;dmarc=none action=none header.from=microsoft.com;
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SA1PR21MB1335:EE_|MN0PR21MB3776:EE_
x-ms-office365-filtering-correlation-id: 714dd96c-6d04-4725-62ec-08db4208de01
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA1PR21MB1335.namprd21.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(366004)(39860400002)(396003)(136003)(346002)(376002)(451199021)(10290500003)(966005)(76116006)(786003)(64756008)(66946007)(66556008)(66476007)(66446008)(316002)(6636002)(4326008)(55016003)(110136005)(7696005)(86362001)(54906003)(71200400001)(478600001)(52536014)(5660300002)(8676002)(8936002)(122000001)(82960400001)(2906002)(4744005)(82950400001)(8990500004)(38100700002)(33656002)(41300700001)(38070700005)(26005)(186003)(6506007)(9686003);DIR:OUT;SFP:1102;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?57yohS2SxlXIRd0JbulR58NOe02UR3DAY6Mxby7SNXb9uftVI8ujvbY+6HGH?=
 =?us-ascii?Q?t//IO0j91qpY+tnIEVlv6Uyf3iApNqVI0t3iw6FvhfONv6+TUjzb8nWWG03M?=
 =?us-ascii?Q?cGBrO7PC/j9rmxkrBlaKLzQuOftL3ilaBIhovTdNOYrN48UveErFHmk8auqd?=
 =?us-ascii?Q?iEVAAiCalO4O3mZ1F762fG3BdGl7ZQhvJZeW2Hz/ohB7dPA3OJxv3sUD4mGq?=
 =?us-ascii?Q?kfV15U2tezzmzCFzk7TOtXD64HsriXFBk+c11+wiBNfF7GrMoS7mhZkqX1mI?=
 =?us-ascii?Q?VQSZks4ca6bEGCriH+OS4qbitkYaQEibm6L+p33/0JjCQaW2LOq+E0C4/FyQ?=
 =?us-ascii?Q?npul19Va4GV1cI1aqNMHMlD/DKu9J2gNACBtlMTRco3Goj+CYFr6gpDb13wN?=
 =?us-ascii?Q?F6TbmI9gzPB5xHWtCR7LI/OVDmiSQXZ2Bq0Ztv6bNB0kVT4WgP5pTITfNkDi?=
 =?us-ascii?Q?nEpULhufvZ45DzGuXwjk8GcwYLQZ+6cO1/beMvcxYIlxTN2mZuEZRI+Ea6KM?=
 =?us-ascii?Q?oU7PXkiK5uBKaddPvUXgfddBJP8GUTRGpQRDbIuFRy0tN6IFz4JCw+OG9vMQ?=
 =?us-ascii?Q?0xMA/fp95wqUYztf3B0gmmb6QtifeuDQ22hOhHLkTgOXwMxSSEyp1gJkmigV?=
 =?us-ascii?Q?8v+y1MXUOSuEb2DNsUPDrWt024i0CraXirDtIN0LAMc11soCgpC5l2zmRyzr?=
 =?us-ascii?Q?S2R3fzlEa6bmV6LyWYaOSvP1uN2BKwTPyBTiUxnBFMlxcLlqXfOqj1AuZ9vV?=
 =?us-ascii?Q?2lAU/ATcjmAoNOEwb760ZV8ccsC3tAZ+CysdQsz2HmcKtAH5+VmcZGRc2RkQ?=
 =?us-ascii?Q?qJcFWvxgS0nwjxwOyo1MhsVMsp1EUtSNrLwFKfc92fQA/MXYN5NygIqkZw5M?=
 =?us-ascii?Q?HocKAdaEk8uL6L7I0IZcdOtRbmXDofNKRHuRM5XjgwB7i0KQt+nF+iNtoB/H?=
 =?us-ascii?Q?Teb4rwbZKzz+Nv5Wg1SPL5SPW88kGs0NDAoJyMOS5sM930muv7H9wh2Er9Ui?=
 =?us-ascii?Q?I2lMxgJ0CSRbY7Gfg1gX+GMkFvUTCFStY/4F6r50C05GvxVvhlg86nQVx2/p?=
 =?us-ascii?Q?n4olepOEcvL2sRPjxmqzVDccuA31xaCPs+49dlsJXKNF02v9p9El5cfqAEy4?=
 =?us-ascii?Q?zPpaN4jOEazwOffVpTPCB4NrSPePb9GJHlhruhDrYmcQPVBMn8/y8zwB6uak?=
 =?us-ascii?Q?ekcJ4DRgQOy5V4Ac4mnjT8BwmP7VhQVLTiopfu6Oxwnd0XNm26IH5hipyN3m?=
 =?us-ascii?Q?W2ehU77hp+6vn/Me+a8vvHVOVO72Of37LBdugALOCfuTkErAsHmKWwjAqySO?=
 =?us-ascii?Q?efdYLmNF/xCqv5HCDO0fgzjvch4m32Wnb4gG7hHuNBMBthgzT4bNb0vcUPd1?=
 =?us-ascii?Q?660uymdUd/9HEkuTc0mIUruU8ni3lX2r/oQjqA3Id41lfmH6DtVn5pZ9emdp?=
 =?us-ascii?Q?sy444HOgBrKHD+0IpyeWuNSWidFLj4AvgwiHzvBIFWkrtwogV61IENpZtWGx?=
 =?us-ascii?Q?HILMDroU2NrboGi6KbKZ4havT1+eu6sNJmrXfNVFjzQuRoDYeJ8mDO+1Vuh9?=
 =?us-ascii?Q?In8Ubc2lx/WboERcLU9YkkrAmhYlEforWoei00CC?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: microsoft.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SA1PR21MB1335.namprd21.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 714dd96c-6d04-4725-62ec-08db4208de01
X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Apr 2023 01:36:45.4842
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: nZeXOvs9XeloZc++0KzFfQBtE9jFdkqTMau61K7rgyb4Gh6kSZIoGInuvPstRGtOgBlmC8bHAZdIMkkP9MgzJA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR21MB3776
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,
        SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> From: Wei Liu <wei.liu@kernel.org>
> Sent: Wednesday, April 12, 2023 6:42 PM
> > > ...
> > > The change here is required for PCI device assignment to work for
> > > Confidential VMs (CVMs), because otherwise we would have to call
> > > set_memory_decrypted() for "hbus->retarget_msi_interrupt_params"
> > > before calling the hypercall HVCALL_RETARGET_INTERRUPT.
> >
> > Well, not all CVMs.  It's not required for SEV-SNP vTOM VMs on=20
> > Hyper-V because of the paravisor. Is it more accurate to say=20
> > "for Confidential VMs (CVMs) running without a paravisor"?
>=20
> Let me know how this text should be reworded.

Thanks, I just posted v2:
https://lwn.net/ml/linux-kernel/20230421013025.17152-1-decui%40microsoft.co=
m/