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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=SATLEXMB04.amd.com; pr=C From: Stewart Hildebrand To: CC: Rahul Singh , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Stewart Hildebrand , Stefano Stabellini , Julien Grall Subject: [PATCH v3 1/5] xen/arm: pci: introduce PCI_PASSTHROUGH Kconfig option Date: Mon, 9 Oct 2023 15:57:40 -0400 Message-ID: <20231009195747.889326-2-stewart.hildebrand@amd.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231009195747.889326-1-stewart.hildebrand@amd.com> References: <20231009195747.889326-1-stewart.hildebrand@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB58:EE_|BL1PR12MB5378:EE_ X-MS-Office365-Filtering-Correlation-Id: 66e59378-0410-4dd6-06b6-08dbc9020fc2 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(346002)(136003)(39860400002)(396003)(376002)(230922051799003)(186009)(451199024)(64100799003)(1800799009)(82310400011)(40470700004)(46966006)(36840700001)(2616005)(426003)(26005)(336012)(1076003)(40460700003)(81166007)(82740400003)(86362001)(36756003)(356005)(40480700001)(8936002)(44832011)(2906002)(4326008)(478600001)(6666004)(47076005)(36860700001)(8676002)(5660300002)(6916009)(316002)(966005)(41300700001)(54906003)(70206006)(70586007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2023 19:58:09.3767 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 66e59378-0410-4dd6-06b6-08dbc9020fc2 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB58.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5378 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1696881523352100001 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: Stewart Hildebrand Signed-off-by: Stefano Stabellini Acked-by: Julien Grall --- (cherry picked from commit 9a08f1f7ce28ec619640ba9ce11018bf443e9a0e from the downstream branch [1]) 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 632dd9792e3c..fcb5a0920c5c 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -191,6 +191,15 @@ 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 From nobody Fri May 17 03:00:58 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2023 19:58:17.5238 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6640b990-1e25-4928-6937-08dbc9021498 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB54.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6277 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1696881529363100001 Content-Type: text/plain; charset="utf-8" Add a flag to struct xen_arch_domainconfig to allow specifying at domain creation time whether the domain uses vPCI. Add a corresponding flag to struct arch_domain to indicate vPCI and set it accordingly. Bump XEN_DOMCTL_INTERFACE_VERSION since we're modifying struct xen_arch_domainconfig. Signed-off-by: Stewart Hildebrand --- v2->v3: * new patch --- xen/arch/arm/domain.c | 10 ++++++++++ xen/arch/arm/include/asm/domain.h | 2 ++ xen/include/public/arch-arm.h | 4 ++++ xen/include/public/domctl.h | 2 +- 4 files changed, 17 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index 28e3aaa5e482..9470c28595da 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -687,6 +687,13 @@ int arch_sanitise_domain_config(struct xen_domctl_crea= tedomain *config) return -EINVAL; } =20 + if ( (config->arch.pci_flags & XEN_DOMCTL_CONFIG_PCI_VPCI) && + !IS_ENABLED(CONFIG_HAS_VPCI) ) + { + dprintk(XENLOG_INFO, "vPCI support not enabled\n"); + return -EINVAL; + } + return 0; } =20 @@ -737,6 +744,9 @@ int arch_domain_create(struct domain *d, BUG(); } =20 + if ( config->arch.pci_flags & XEN_DOMCTL_CONFIG_PCI_VPCI ) + d->arch.has_vpci =3D true; + if ( (rc =3D domain_vgic_register(d, &count)) !=3D 0 ) goto fail; =20 diff --git a/xen/arch/arm/include/asm/domain.h b/xen/arch/arm/include/asm/d= omain.h index 99e798ffff68..0a66ed09a617 100644 --- a/xen/arch/arm/include/asm/domain.h +++ b/xen/arch/arm/include/asm/domain.h @@ -119,6 +119,8 @@ struct arch_domain void *tee; #endif =20 + bool has_vpci; + } __cacheline_aligned; =20 struct arch_vcpu diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h index 6a4467e8f5d1..5c8424341aad 100644 --- a/xen/include/public/arch-arm.h +++ b/xen/include/public/arch-arm.h @@ -300,6 +300,8 @@ DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t); #define XEN_DOMCTL_CONFIG_TEE_OPTEE 1 #define XEN_DOMCTL_CONFIG_TEE_FFA 2 =20 +#define XEN_DOMCTL_CONFIG_PCI_VPCI (1U << 0) + struct xen_arch_domainconfig { /* IN/OUT */ uint8_t gic_version; @@ -323,6 +325,8 @@ struct xen_arch_domainconfig { * */ uint32_t clock_frequency; + /* IN */ + uint8_t pci_flags; }; #endif /* __XEN__ || __XEN_TOOLS__ */ =20 diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h index a33f9ec32b08..dcd42b3d603d 100644 --- a/xen/include/public/domctl.h +++ b/xen/include/public/domctl.h @@ -21,7 +21,7 @@ #include "hvm/save.h" #include "memory.h" =20 -#define XEN_DOMCTL_INTERFACE_VERSION 0x00000016 +#define XEN_DOMCTL_INTERFACE_VERSION 0x00000017 =20 /* * NB. xen_domctl.domain is an IN/OUT parameter for this operation. --=20 2.42.0 From nobody Fri May 17 03:00:58 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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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=SATLEXMB04.amd.com; pr=C From: Stewart Hildebrand To: CC: Oleksandr Andrushchenko , "Stefano Stabellini" , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Rahul Singh , "Stewart Hildebrand" Subject: [PATCH v3 3/5] xen/arm: make has_vpci() depend on d->arch.has_vpci Date: Mon, 9 Oct 2023 15:57:42 -0400 Message-ID: <20231009195747.889326-4-stewart.hildebrand@amd.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231009195747.889326-1-stewart.hildebrand@amd.com> References: <20231009195747.889326-1-stewart.hildebrand@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB55:EE_|PH0PR12MB7840:EE_ X-MS-Office365-Filtering-Correlation-Id: 775c1503-b014-443b-b828-08dbc9021eaa 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: 09 Oct 2023 19:58:34.4210 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 775c1503-b014-443b-b828-08dbc9021eaa 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB55.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7840 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1696881545449100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Andrushchenko VPCI is disabled on ARM. Make it depend on d->arch.has_vpci to enable the P= CI passthrough support on ARM. While here, remove the comment on the preceding line. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Rahul Singh Signed-off-by: Stewart Hildebrand --- There are two downstreams [1] [2] that have independently made a version th= is change, each with different Signed-off-by's. I simply picked one at random = for the Author: field, and added both Signed-off-by lines. Please let me know if there are any objections. v2->v3: * use d->arch.has_vpci since plumbing struct arch_domain with a vPCI flag v1->v2: * add is_hardware_domain check. This will need to be removed after the vPCI series [3] is merged. downstream->v1: * change to IS_ENABLED(CONFIG_HAS_VPCI) instead of hardcoded to true * remove the comment on the preceding line [1] https://gitlab.com/xen-project/people/bmarquis/xen-arm-poc/-/commit/27b= e1729ce8128dbe37275ce7946b2fbd2e5a382 [2] https://github.com/xen-troops/xen/commit/bf12185e6fb2e31db0d8e6ea9ccd8a= 02abadec17 [3] https://lists.xenproject.org/archives/html/xen-devel/2023-08/msg02361.h= tml --- xen/arch/arm/include/asm/domain.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/xen/arch/arm/include/asm/domain.h b/xen/arch/arm/include/asm/d= omain.h index 0a66ed09a617..ebba2c25dceb 100644 --- a/xen/arch/arm/include/asm/domain.h +++ b/xen/arch/arm/include/asm/domain.h @@ -300,8 +300,7 @@ static inline void arch_vcpu_block(struct vcpu *v) {} =20 #define arch_vm_assist_valid_mask(d) (1UL << VMASST_TYPE_runstate_update_f= lag) =20 -/* vPCI is not available on Arm */ -#define has_vpci(d) ({ (void)(d); 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2023 19:58:53.2388 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: bf522a57-67e7-4c2a-149d-08dbc90229e2 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB57.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB6680 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1696881561742100001 Content-Type: text/plain; charset="utf-8" Set the pci flags in xen_arch_domainconfig to enable vPCI for dom0. Signed-off-by: Stewart Hildebrand --- Julien had a suggestion to make this conditional on pci_passthrough_enabled= [1]. However, in v5 of the PCI ARM SMMU series [2], we propose removing the pci_passthrough_enabled flag. If pci_passthrough_enabled is gone, the condi= tions under which vPCI should be enabled for dom0 aren't entirely clear to me (ot= her than CONFIG_HAS_VPCI=3Dy). v2->v3: * new patch [1] https://lists.xenproject.org/archives/html/xen-devel/2023-10/msg00475.h= tml [2] https://lists.xenproject.org/archives/html/xen-devel/2023-10/msg00210.h= tml --- xen/arch/arm/domain_build.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 24c9019cc43c..c1174535f430 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -3912,6 +3912,9 @@ void __init create_dom0(void) panic("SVE vector length error\n"); } =20 + if ( IS_ENABLED(CONFIG_HAS_VPCI) ) + dom0_cfg.arch.pci_flags =3D XEN_DOMCTL_CONFIG_PCI_VPCI; + dom0 =3D domain_create(0, &dom0_cfg, CDF_privileged | CDF_directmap); if ( IS_ERR(dom0) ) panic("Error creating domain 0 (rc =3D %ld)\n", PTR_ERR(dom0)); --=20 2.42.0 From nobody Fri May 17 03:00:58 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2023 19:59:13.0054 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ba39dcb4-52ac-4e55-d66b-08dbc90235a7 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB53.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8957 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1696881829087100001 Content-Type: text/plain; charset="utf-8" Select HAS_VPCI_GUEST_SUPPORT in Kconfig for enabling vPCI in domUs. Set the pci flags in xen_arch_domainconfig to enable vPCI if a pci device h= as been specified in the xl domain config file. Signed-off-by: Stewart Hildebrand --- As the tag implies, this patch is not intended to be merged (yet). Note that CONFIG_HAS_VPCI_GUEST_SUPPORT is not currently used in the upstre= am code base. It will be used by the vPCI series [1]. This patch is intended t= o be merged as part of the vPCI series. I'll coordinate with Volodymyr to include this in the vPCI series or resend afterwards. Meanwhile, I'll include it he= re until the Kconfig and xen_arch_domainconfig prerequisites have been committ= ed. v2->v3: * set pci flags in toolstack v1->v2: * new patch [1] https://lists.xenproject.org/archives/html/xen-devel/2023-08/msg02361.h= tml --- tools/libs/light/libxl_arm.c | 3 +++ xen/arch/arm/Kconfig | 1 + 2 files changed, 4 insertions(+) diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c index 15391917748c..931b2f8852ff 100644 --- a/tools/libs/light/libxl_arm.c +++ b/tools/libs/light/libxl_arm.c @@ -222,6 +222,9 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc, config->arch.sve_vl =3D d_config->b_info.arch_arm.sve_vl / 128U; } =20 + if (d_config->num_pcidevs) + config->arch.pci_flags =3D XEN_DOMCTL_CONFIG_PCI_VPCI; + return 0; } =20 diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index fcb5a0920c5c..6f33373f9035 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -196,6 +196,7 @@ config PCI_PASSTHROUGH depends on ARM_64 select HAS_PCI select HAS_VPCI + select HAS_VPCI_GUEST_SUPPORT default n help This option enables PCI device passthrough --=20 2.42.0