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Smith" , Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , "Volodymyr Babchuk" , Andrew Cooper , Anthony PERARD , "Jan Beulich" , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Jason Andryuk Subject: [PATCH v2 1/6] xen: introduce hardware domain create flag Date: Mon, 31 Mar 2025 17:43:16 -0400 Message-ID: <20250331214321.205331-2-jason.andryuk@amd.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250331214321.205331-1-jason.andryuk@amd.com> References: <20250331214321.205331-1-jason.andryuk@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: None (SATLEXMB04.amd.com: jason.andryuk@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002314:EE_|DS0PR12MB6608:EE_ X-MS-Office365-Filtering-Correlation-Id: 02aeb4d3-79d5-41b0-d0bd-08dd709d12eb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|34020700016|36860700013|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?hvZECFTcQVbns7mR5kGAgcKD1Pd/HNuUci6HIF18OJn20OokqNjMkioEkQrw?= =?us-ascii?Q?RWVvGF3fbcr7wdtsgjaWoqmU7qRyG8re6niitceYy4QQsASlnexURItFVnfo?= =?us-ascii?Q?Kv5mVu37srDEx+shE6siCjSDOtUB9Ko+NhpmydSCBfIotEMitqqtfbH6ytiz?= =?us-ascii?Q?2Dm416SCdTYlH5LhpXwxwHGVBmQsMcdk/0tS2XsjVEstmk8jfWkarA7Zy+d/?= =?us-ascii?Q?s5TqRoosuKqURZWc366+DwL0pMkJBMmCFWHXkdhdaoKquCe2NvrocGrlzyv8?= =?us-ascii?Q?X43LfIbSA5mVIjsenb2p69a8UMaJg96ZecRYkN6RPCoUMPEuRt1CPjTFY3vn?= =?us-ascii?Q?8U3Q6tjbzq2uNIniX/GGrvnCcwUCgOLq1pD2lVIQDhCo/dL6pzm8LYQnnj1b?= =?us-ascii?Q?Qg5ifw3YES7Cj+qBu5xQJxhvUG7mqTvgZjoSJU7088aP0NfSisMxZ5mdqGmu?= =?us-ascii?Q?sRopcrIhlC6AcjWPjC4pb7njtKSlQ61xuYWm0S4/qSCJY+nWmIy9Hiq1WPVR?= =?us-ascii?Q?XBfDbTXEJjdegrT93+LCeN1FmelVDvxghVn6wyHWX+6jVxlHxor8pivYgdpA?= =?us-ascii?Q?Xo0thh0bUXvnpsbNS02rI/ooX68dpTQsKxsIXW8PEVqB2c/AUci8tcFkhPOM?= =?us-ascii?Q?I1cdxUaPmnzOhqco74czQD7cPtDBbUH1giEhOy4WHHy8SiJLjCeTtqs+CXrd?= =?us-ascii?Q?XWvzSUJW5X5BbP1mhoKdBGCQ8dmoHfIcIJjzRM35/1Yvm9Pz/FDZewCZF8lo?= =?us-ascii?Q?zY00KG6l+eQGn/POSHN6/uhbanfdIAzEpZJIJvAK/jWxsvpiQppcq+7fc1d7?= =?us-ascii?Q?3mKNgUDK3kx9uVBeZ4GW09qTQ7gktC9EYQw+aMtVZAZepW0ZvLnQvU61iel3?= =?us-ascii?Q?7tsNRjg8VGjQFNuWw9TTdvhXfDFc7uNjs6GCAWpicnjssrBZYcyrnGNHrPXN?= =?us-ascii?Q?aGJwWaYIGbJSCehEmwTA76V95Bv17Jn+VxfoCs39wNYFb5ULUyjfBDUtXUo7?= =?us-ascii?Q?cAlOmMuqDeQbzT0+sSMdRN6YhkEo02mUmDys6SJE0TV820+gyNz3yq1R+EeQ?= =?us-ascii?Q?SJyne3hBZ+YBFcfaMo4XJ0fp+ylirOcwMMiU4cI0RlSsASBsOBIGCeWOYr0k?= =?us-ascii?Q?YKnBXeLotXTtiFvfImKdlwjTjM7gmsOcp9Vp8G4aWnlJRH5tkKoyiShWkNyw?= =?us-ascii?Q?RRzWIzOebBvmLjD+r8/YZOJZEUG4Q0S2uLcaaclCNRluBMAWzIlrwjok0QXV?= =?us-ascii?Q?PwRGbcUckY2w5sg9ryghLzGpDvqzKNN+hmYhfEOutK4Au8PmGQw0P4EpqraH?= =?us-ascii?Q?1fhUUm5Cu4Al4jKO1dQDE47nK9rgRhJcGzGIrs0zpU99+Hdcb2MjZyW9wVyz?= =?us-ascii?Q?yXC59RawDoryKj/dRqp0GFHN7DwqE/KID29jGdUpHcSf7WTUbeEsC/jpUOMc?= =?us-ascii?Q?mP/zJZeHPTLfBwZIEOlse6xI6Fl+NmnR/8G1HHR+KwSqcEXE8vVf9Q=3D=3D?= 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)(82310400026)(1800799024)(34020700016)(36860700013)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Mar 2025 21:43:28.4536 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 02aeb4d3-79d5-41b0-d0bd-08dd709d12eb 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: SJ1PEPF00002314.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB6608 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1743457439849019000 Content-Type: text/plain; charset="utf-8" From: "Daniel P. Smith" Add and use a new internal create domain flag to specify the hardware domain. This removes the hardcoding of domid 0 as the hardware domain. This allows more flexibility with domain creation. Signed-off-by: Daniel P. Smith Signed-off-by: Jason Andryuk Reviewed-by: Jan Beulich --- v2: () around binary & Only allow late_hwdom for dom0 --- xen/arch/arm/domain_build.c | 2 +- xen/arch/x86/setup.c | 3 ++- xen/common/domain.c | 6 +++++- xen/include/xen/domain.h | 2 ++ 4 files changed, 10 insertions(+), 3 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 2b5b433183..051c48329a 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -2366,7 +2366,7 @@ void __init create_dom0(void) .max_maptrack_frames =3D -1, .grant_opts =3D XEN_DOMCTL_GRANT_version(opt_gnttab_max_version), }; - unsigned int flags =3D CDF_privileged; + unsigned int flags =3D CDF_privileged | CDF_hardware; int rc; =20 /* The vGIC for DOM0 is exactly emulating the hardware GIC */ diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index d70abb7e0c..67d399c469 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -1018,7 +1018,8 @@ static struct domain *__init create_dom0(struct boot_= info *bi) =20 /* Create initial domain. Not d0 for pvshim. */ domid =3D get_initial_domain_id(); - d =3D domain_create(domid, &dom0_cfg, pv_shim ? 0 : CDF_privileged); + d =3D domain_create(domid, &dom0_cfg, + pv_shim ? 0 : CDF_privileged | CDF_hardware); if ( IS_ERR(d) ) panic("Error creating d%u: %ld\n", domid, PTR_ERR(d)); =20 diff --git a/xen/common/domain.c b/xen/common/domain.c index 585fd726a9..b3eb589872 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -820,11 +820,15 @@ struct domain *domain_create(domid_t domid, d->is_privileged =3D flags & CDF_privileged; =20 /* Sort out our idea of is_hardware_domain(). */ - if ( domid =3D=3D 0 || domid =3D=3D hardware_domid ) + if ( (flags & CDF_hardware) || domid =3D=3D hardware_domid ) { if ( hardware_domid < 0 || hardware_domid >=3D DOMID_FIRST_RESERVE= D ) panic("The value of hardware_dom must be a valid domain ID\n"); =20 + /* late_hwdom is only allowed for dom0. */ + if ( hardware_domain && hardware_domain->domain_id ) + return ERR_PTR(-EINVAL); + old_hwdom =3D hardware_domain; hardware_domain =3D d; } diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h index 83069de501..9be18d16b9 100644 --- a/xen/include/xen/domain.h +++ b/xen/include/xen/domain.h @@ -52,6 +52,8 @@ domid_t get_initial_domain_id(void); #else #define CDF_staticmem 0 #endif +/* This is the hardware domain. Only 1 allowed. */ +#define CDF_hardware (1U << 3) =20 #define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap) #define is_domain_using_staticmem(d) ((d)->cdf & CDF_staticmem) --=20 2.49.0