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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Stewart Hildebrand To: CC: Rahul Singh , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Stefano Stabellini , Stewart Hildebrand , Julien Grall Subject: [PATCH v4 1/5] xen/arm: pci: introduce PCI_PASSTHROUGH Kconfig option Date: Mon, 30 Oct 2023 19:52:32 -0400 Message-ID: <20231030235240.106998-2-stewart.hildebrand@amd.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231030235240.106998-1-stewart.hildebrand@amd.com> References: <20231030235240.106998-1-stewart.hildebrand@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB74:EE_|DM6PR12MB4483:EE_ X-MS-Office365-Filtering-Correlation-Id: 5f1b210c-ea2b-48c3-3b0b-08dbd9a35f41 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2023 23:53:10.3751 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5f1b210c-ea2b-48c3-3b0b-08dbd9a35f41 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB74.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4483 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1698710025253100001 Content-Type: text/plain; charset="utf-8" From: Rahul Singh Setting CONFIG_PCI_PASSTHROUGH=3Dy will enable PCI passthrough on ARM, even= though the feature is not yet complete in the current upstream codebase. The purpo= se of this is to make it easier to enable the necessary configs (HAS_PCI, HAS_VPC= I) for testing and development of PCI passthrough on ARM. Since PCI passthrough on ARM is still work in progress at this time, make it depend on EXPERT. Signed-off-by: Rahul Singh Signed-off-by: Stefano Stabellini Signed-off-by: Stewart Hildebrand Acked-by: Julien Grall --- (cherry picked from commit 9a08f1f7ce28ec619640ba9ce11018bf443e9a0e from the downstream branch [1]) v3->v4: * no change v2->v3: * add Julien's A-b v1->v2: * drop "ARM" naming since it is already in an ARM category * depend on EXPERT instead of UNSUPPORTED Changes from downstream to v1: * depends on ARM_64 (Stefano) * Don't select HAS_VPCI_GUEST_SUPPORT since this config option is not curre= ntly used in the upstream codebase. This will want to be re-added here once the vpci series [2] is merged. * Don't select ARM_SMMU_V3 since this option can already be selected independently. While PCI passthrough on ARM depends on an SMMU, it does n= ot depend on a particular version or variant of an SMMU. * Don't select HAS_ITS since this option can already be selected independen= tly. HAS_ITS may want to be added here once the MSI series [1] is merged. * Don't select LATE_HWDOM since this option is unrelated to PCI passthrough. [1] https://gitlab.com/xen-project/people/bmarquis/xen-arm-poc/-/commits/po= c/pci-passthrough [2] https://lists.xenproject.org/archives/html/xen-devel/2023-08/msg02361.h= tml --- xen/arch/arm/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index 2939db429b78..5ff68e5d5979 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -190,6 +190,15 @@ config STATIC_SHM help This option enables statically shared memory on a dom0less system. =20 +config PCI_PASSTHROUGH + bool "PCI passthrough" if EXPERT + depends on ARM_64 + select HAS_PCI + select HAS_VPCI + default n + help + This option enables PCI device passthrough + endmenu =20 menu "ARM errata workaround via the alternative framework" --=20 2.42.0