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Smith" , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Anthony PERARD , Michal Orzel , "Julien Grall" , Stefano Stabellini , "Jason Andryuk" , Alejandro Vallejo Subject: [PATCH v4 13/13] x86/hyperlaunch: add capabilities to boot domain Date: Thu, 17 Apr 2025 13:48:35 +0100 Message-ID: <20250417124844.11143-14-agarciav@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250417124844.11143-1-agarciav@amd.com> References: <20250417124844.11143-1-agarciav@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF00000142:EE_|CH2PR12MB4039:EE_ X-MS-Office365-Filtering-Correlation-Id: f117c596-c7ab-4ac6-5e14-08dd7dae4b88 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?IkFbHBk/L+k0Ki3LbIxisTfRBwAGVc02Zn/IBw1l6lJOJl37lJ2/ND++cLmT?= =?us-ascii?Q?KUg3J1/E7cPxkU0XKd76EMOataaIpvRyvP51aqV1z+ztM32HHKSHuKbf4axV?= =?us-ascii?Q?4FPirxqNtFiE+LD9t+SQ1Db8VhzaFixMwWgDndoyVJB+OWk+OhQ5jV5ENDNh?= =?us-ascii?Q?zmwMHiGtWyHAgk9XcamU/c3r0NiDoZlJv1mkdBDe+S5SESI6G3MDUjS90nAu?= =?us-ascii?Q?goVTKfTJnU0FPpcwNgtuAIRw2dQFVrsj1T+AqCrdhQMWrnAwhg6zQ1WK1bCq?= =?us-ascii?Q?/V+x1RGjGDwftHecW5Qki9yzeS+pvfkrUO+0GAuTuDJkneOEEiqFRp/IjByQ?= =?us-ascii?Q?G+AQhV+uftOpgeMCBYMQI4XGdOz8VTtDxGEuEgVo4ZzA+Ddr0PjXnBOJ++vD?= =?us-ascii?Q?+0lrhMMQnviWWGHatpA1uc09hnHnFCCupi2SiwmpAJZZ3YzSfVYCXHPkhM6Y?= =?us-ascii?Q?wxZJrNjKqklcrL+FXPqla+q8UhSrvgiP9cHyqlNHzQg9vi1uv0lrOTLse7aT?= =?us-ascii?Q?SzyWwoExgSDc3P5T/ih15H8ZpaR4Pf5KwH6nyg07l3YkqutJRLIsUGQb9XDj?= =?us-ascii?Q?VJpwJ82T/s6q9EM2aX8j9E8kOQ3i/WRuygDaWLFIp6i2sy4vEkmBoNoSiYh3?= =?us-ascii?Q?89x3mNBa2IZauYwKdEWXDu/eu76lFVwBEfnmXqSOOZErIOrUsS/4ENMWgHWo?= =?us-ascii?Q?b/gIiMQe81F2680FZISZYHuXPhoatHTvv8oXbeV0+q7BbOVQFBZ4nUbB2Y7X?= =?us-ascii?Q?iHj+dqJ3aKedf0DL21Ymeeb2mqvgY1X9/OfJKB5+f8XeEfCKm73+n3f8vXy9?= =?us-ascii?Q?gghHeaHsbHhXRjNrBWvaUgte1eDtzZHOtoFgzDXCSQJxG9VRym6Gn3JWx8OW?= =?us-ascii?Q?Yoy3sMpR71dt1jBRGA9dtNOGqOSZgD0WYa5KuDbhrK+b6MOeffRzn+25UY6c?= =?us-ascii?Q?lTbfvYfcPilp82jOYFBWKYrikE3vkRDOcyy+9b3IGQeNF0ifG4LbLgkGJ+t0?= =?us-ascii?Q?u77mAFc3v2vca+g0uxbAicMNQrjk+bZJ/q0aZD6g5Oo9XSCtDpanXVURxRGo?= =?us-ascii?Q?ZN6DYHUwogQwkYybZjvLyOF2Q7JbrP2awC2Tp6pVcb/qLjC4gOE5omrv1B1r?= =?us-ascii?Q?rMP8Glcr/gYaEHhanbmqZKT5a8MpZS8GCdEO194W1xB+Q9ANm7dvTZyJjkZD?= =?us-ascii?Q?b5AOd2mLEoUmsXsCUGTcgwBQiGkZnsA4++BPAnIrf6XxI3j7LLkUZCnWx+0m?= =?us-ascii?Q?Chi1ALo7kYyfTJzH7cvWJnF+vmuK8iQDdkhy/8FUIKRSjBh2iEx0dU3vP9F8?= =?us-ascii?Q?yWOC4nkxvah0zDKBQVaBmP5Q0V1mJUtxCut6ptR7SclDEutwnutE2uX4fVZ2?= =?us-ascii?Q?BpH6hs4wMpmTFqA0kOYzdkStj5AAEfRGXTvJnqQzeyErMuFWj2rcMDl/oygJ?= =?us-ascii?Q?y4tYbghn7T06ly9C9Tbngh5+Cdi8ZGsVLwKiLw/f2i1KA+aJ8IBbk1J9UFF+?= =?us-ascii?Q?q3QV/LcZDqWw5rx7fPbIwOicumHcyK0EuY96?= 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:(13230040)(36860700013)(82310400026)(1800799024)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Apr 2025 12:49:30.0838 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f117c596-c7ab-4ac6-5e14-08dd7dae4b88 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: CH2PEPF00000142.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4039 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1744894344282019000 Content-Type: text/plain; charset="utf-8" From: "Daniel P. Smith" Introduce the ability to assign capabilities to a domain via its definition= in device tree. The first capability enabled to select is the control domain capability. The capability property is a bitfield in both the device tree a= nd `struct boot_domain`. Signed-off-by: Daniel P. Smith Signed-off-by: Jason Andryuk Signed-off-by: Alejandro Vallejo Reviewed-by: Denis Mukhin --- v4: * Dropped Jason's R-by. * Refactored caps printinng logic * It just wasn't xenlog-compatible as it was. * Moved pv_shim check to builder_init, so the capability is just not give= n. * And inlined the create_flags variable now that's tractable. * Validated input capabilities after coming out of the DT. --- xen/arch/x86/include/asm/boot-domain.h | 5 +++++ xen/arch/x86/setup.c | 3 ++- xen/common/domain-builder/core.c | 2 ++ xen/common/domain-builder/fdt.c | 20 ++++++++++++++++++++ 4 files changed, 29 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/include/asm/boot-domain.h b/xen/arch/x86/include/= asm/boot-domain.h index 969c02a6ea..5c143d82af 100644 --- a/xen/arch/x86/include/asm/boot-domain.h +++ b/xen/arch/x86/include/asm/boot-domain.h @@ -13,6 +13,11 @@ struct boot_domain { domid_t domid; =20 +#define BUILD_CAPS_NONE (0U) +#define BUILD_CAPS_CONTROL (1U << 0) +#define BUILD_CAPS__ALL BUILD_CAPS_CONTROL + uint32_t capabilities; + /* On | Off */ #define BUILD_MODE_PARAVIRT (1 << 0) /* PV | PVH/HVM */ #define BUILD_MODE_ENABLE_DM (1 << 1) /* HVM | PVH */ diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index 455dad454c..3cdd8bc2f9 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -1040,7 +1040,8 @@ static struct domain *__init create_dom0(struct boot_= info *bi) if ( bd->domid =3D=3D DOMID_INVALID ) /* Create initial domain. Not d0 for pvshim. */ bd->domid =3D get_initial_domain_id(); - d =3D domain_create(bd->domid, &dom0_cfg, pv_shim ? 0 : CDF_privileged= ); + d =3D domain_create(bd->domid, &dom0_cfg, + (bd->capabilities & BUILD_CAPS_CONTROL) ? CDF_privileged : 0); if ( IS_ERR(d) ) panic("Error creating d%u: %ld\n", bd->domid, PTR_ERR(d)); =20 diff --git a/xen/common/domain-builder/core.c b/xen/common/domain-builder/c= ore.c index 4b4230f2ff..d1a5d6125e 100644 --- a/xen/common/domain-builder/core.c +++ b/xen/common/domain-builder/core.c @@ -8,6 +8,7 @@ #include =20 #include +#include #include =20 #include "fdt.h" @@ -93,6 +94,7 @@ void __init builder_init(struct boot_info *bi) =20 bi->mods[i].type =3D BOOTMOD_KERNEL; bi->domains[0].kernel =3D &bi->mods[i]; + bi->domains[0].capabilities |=3D pv_shim ? 0 : BUILD_CAPS_CONTROL; bi->nr_domains =3D 1; } } diff --git a/xen/common/domain-builder/fdt.c b/xen/common/domain-builder/fd= t.c index 295ab6e8b3..3e3a84e2d0 100644 --- a/xen/common/domain-builder/fdt.c +++ b/xen/common/domain-builder/fdt.c @@ -293,6 +293,26 @@ static int __init process_domain_node( bd->max_vcpus =3D val; printk(XENLOG_INFO " cpus: %d\n", bd->max_vcpus); } + else if ( !strncmp(prop_name, "capabilities", name_len) ) + { + if ( (rc =3D fdt_prop_as_u32(prop, &bd->capabilities)) ) + { + printk(XENLOG_ERR + " bad \"capabilities\" on domain %s\n", name); + return rc; + } + + if ( bd->capabilities & ~BUILD_CAPS__ALL ) + { + printk(XENLOG_WARNING " unknown capabilities: %#x\n", + bd->capabilities & ~BUILD_CAPS__ALL); + + bd->capabilities &=3D BUILD_CAPS__ALL; + } + + printk(XENLOG_INFO " caps: %s\n", + bd->capabilities & BUILD_CAPS_CONTROL ? "c" : ""); + } } =20 fdt_for_each_subnode(node, fdt, dom_node) --=20 2.43.0