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Smith" , Anthony PERARD Subject: [PATCH] xen/xsm: Wire up get_dom0_console Date: Fri, 26 Apr 2024 00:04:32 -0400 Message-ID: <20240426040432.51910-1-jason.andryuk@amd.com> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: None (SATLEXMB03.amd.com: jason.andryuk@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00003AE9:EE_|SJ2PR12MB8883:EE_ X-MS-Office365-Filtering-Correlation-Id: e7aa0760-bae1-47fd-c6ae-08dc6622005c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?wYAzEABuOGavI1pAUIA+7sz3Y5xHgNP1oUVgrNhSFy5MAVuMZJYxugY7KECX?= =?us-ascii?Q?rGWoxFQAcEwyJ6qyEM2meIdX85bq4Ijj28tziiQdKFt928a9dOy8wnevHen5?= =?us-ascii?Q?YJfcar5rqqIIy4HixH58JvUiSUzvgwH9WJoScX7Wv05PFepiYZYlrhnbWUZT?= =?us-ascii?Q?wkU41qXVslUMEUsMAnxKo7QMXvExFLj6XCPQDshbwabKyaSLbfU4apxeTTw5?= =?us-ascii?Q?d591/K1+kt1hIVbVTDXDk6iA4XAO6C/OhtwNQOJIL9rZ2dxWFKpfk7kZk+At?= =?us-ascii?Q?gPMSIO/KphAkGKV1/nPQlmgiVkcfGNkSo8BBwJrxvTVOB0gpsSmhtZflmruj?= =?us-ascii?Q?EhcV281uH2NAJWXMGIZthlICOr05uzCDVTOzOz6lEG44+khqCGQ3cOmHtIl5?= =?us-ascii?Q?1DYO/VdXSM2Do54ZTKJecdqVyTsdo6E0s7RQRkWlQ6p2dyi2lwv1lDPz+AAW?= =?us-ascii?Q?SW8ig3Ks6VWG17DOPcR0eehffpY7hys6hQjO5Le1fOOh8qKejUFFr6igICoM?= =?us-ascii?Q?E0qb0o0yogPqMpoO1IGIrXTfoNix18E+Tzxok3BoQCzOBPYrWIRXVecG0Tp6?= =?us-ascii?Q?nTGhs03gRGdPENfGTlM3b5HmcImFEAR/apwU8zjh6o90xhC6dpIeEVD41AJp?= =?us-ascii?Q?j8PxAlxQoPfRVOlCDSTnjsshxUPzFAJLjSWO3swvIIZkwRxQ+9Zv8xuAKrJh?= =?us-ascii?Q?doUuyW8RzR09yYuS1pnzJhSeGZZqo9aRo7z/LCibKOhYpW8JBwy1l5sPKuAM?= =?us-ascii?Q?D4cvgxUxL0A4n9TOXb9QZrjQ7A6gW1dtU6nBFIzHVfQOpsuVbWva7AuGP9m7?= =?us-ascii?Q?RobN8FZEwJxYM/mG80/clm5lXR6wZ+tbWzwQpfLYUVjzF5W1OWUT7T5aReCn?= =?us-ascii?Q?uRsvwsqShFPKRI1udDjatea6g4VlkS7Q+ctCYnndyCLH3BRaIHBOslEhut1k?= =?us-ascii?Q?ff2n20sHfL7QaDQ5U3lbmIAlbcvjkeQfa3l8BgCccKbfb+5xM1Dykn06qvJ8?= =?us-ascii?Q?zJFfw05CZwJe+VW0LizjcEt0qfPO4srL3WNc5I8x2Pf8ppGH4WSKQCCogJS7?= =?us-ascii?Q?b/Y3QSbAbQrsxdYGTj9ibx6Kwi6b8DpTDfcn17dbiTg8aX6t8qRSiBS5CGkE?= =?us-ascii?Q?zpqRVfBXShLhKgGf7t/xJZUSWGsrdiiqAx5wGoZkX8AnpOyRR5EGdngBcK4x?= =?us-ascii?Q?IHPsXnf5Y3hJn49Zlk8MG7FhIZQZUF1ZCvYIKpWJ0aL4/rxvkBrsbPBP6QnC?= =?us-ascii?Q?ITqmHilDOFkEW/HI9HAXKd+BLwxlLOuhfjoxGogz4bBwVQciTOCxdhclHWiv?= =?us-ascii?Q?f0ijJlJHpTKK5VsQVjSxN3CUJzbtM576L/c5kuC6MYokQvib4A7SKGl5H+xW?= =?us-ascii?Q?AQF2U9PuEyrLZpKls2mHzQH0akc8?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(82310400014)(376005)(1800799015)(36860700004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2024 18:52:19.9831 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e7aa0760-bae1-47fd-c6ae-08dc6622005c 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: SA2PEPF00003AE9.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8883 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1714157570395100001 Content-Type: text/plain; charset="utf-8" An XSM hook for get_dom0_console is currently missing. Using XSM with a PVH dom0 shows: (XEN) FLASK: Denying unknown platform_op: 64. Wire up the hook, and allow it for dom0. Fixes: 4dd160583c ("x86/platform: introduce hypercall to get initial video = console settings") Signed-off-by: Jason Andryuk Acked-by: Daniel P. Smith --- tools/flask/policy/modules/dom0.te | 2 +- xen/xsm/flask/hooks.c | 4 ++++ xen/xsm/flask/policy/access_vectors | 2 ++ 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/flask/policy/modules/dom0.te b/tools/flask/policy/module= s/dom0.te index f1dcff48e2..16b8c9646d 100644 --- a/tools/flask/policy/modules/dom0.te +++ b/tools/flask/policy/modules/dom0.te @@ -16,7 +16,7 @@ allow dom0_t xen_t:xen { allow dom0_t xen_t:xen2 { resource_op psr_cmt_op psr_alloc pmu_ctrl get_symbol get_cpu_levelling_caps get_cpu_featureset livepatch_op - coverage_op + coverage_op get_dom0_console }; =20 # Allow dom0 to use all XENVER_ subops that have checks. diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c index 78225f68c1..5e88c71b8e 100644 --- a/xen/xsm/flask/hooks.c +++ b/xen/xsm/flask/hooks.c @@ -1558,6 +1558,10 @@ static int cf_check flask_platform_op(uint32_t op) return avc_has_perm(domain_sid(current->domain), SECINITSID_XEN, SECCLASS_XEN2, XEN2__GET_SYMBOL, NULL); =20 + case XENPF_get_dom0_console: + return avc_has_perm(domain_sid(current->domain), SECINITSID_XEN, + SECCLASS_XEN2, XEN2__GET_DOM0_CONSOLE, NULL); + default: return avc_unknown_permission("platform_op", op); } diff --git a/xen/xsm/flask/policy/access_vectors b/xen/xsm/flask/policy/acc= ess_vectors index 4e6710a63e..a35e3d4c51 100644 --- a/xen/xsm/flask/policy/access_vectors +++ b/xen/xsm/flask/policy/access_vectors @@ -99,6 +99,8 @@ class xen2 livepatch_op # XEN_SYSCTL_coverage_op coverage_op +# XENPF_get_dom0_console + get_dom0_console } =20 # Classes domain and domain2 consist of operations that a domain performs = on --=20 2.44.0