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pr=C From: Jason Andryuk To: Juergen Gross , Boris Ostrovsky , Thomas Gleixner , "Ingo Molnar" , Borislav Petkov , Dave Hansen , , "H. Peter Anvin" , Stefano Stabellini , "Oleksandr Tyshchenko" , Paolo Bonzini , Brian Gerst CC: , , "Jason Andryuk" Subject: [PATCH v3 1/5] xen: sync elfnote.h from xen tree Date: Fri, 23 Aug 2024 15:36:26 -0400 Message-ID: <20240823193630.2583107-2-jason.andryuk@amd.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240823193630.2583107-1-jason.andryuk@amd.com> References: <20240823193630.2583107-1-jason.andryuk@amd.com> MIME-Version: 1.0 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: BN2PEPF000044A9:EE_|MW6PR12MB8867:EE_ X-MS-Office365-Filtering-Correlation-Id: 679b3fdf-9c96-4805-eb13-08dcc3aae788 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|376014|7416014|921020; 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:(13230040)(36860700013)(82310400026)(1800799024)(376014)(7416014)(921020);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2024 19:36:37.5509 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 679b3fdf-9c96-4805-eb13-08dcc3aae788 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: BN2PEPF000044A9.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8867 Sync Xen's elfnote.h header from xen.git to pull in the XEN_ELFNOTE_PHYS32_RELOC define. xen commit dfc9fab00378 ("x86/PVH: Support relocatable dom0 kernels") This is a copy except for the removal of the emacs editor config at the end of the file. Signed-off-by: Jason Andryuk Reviewed-by: Juergen Gross --- include/xen/interface/elfnote.h | 93 +++++++++++++++++++++++++++++++-- 1 file changed, 88 insertions(+), 5 deletions(-) diff --git a/include/xen/interface/elfnote.h b/include/xen/interface/elfnote.h index 38deb1214613..918f47d87d7a 100644 --- a/include/xen/interface/elfnote.h +++ b/include/xen/interface/elfnote.h @@ -11,7 +11,9 @@ #define __XEN_PUBLIC_ELFNOTE_H__ /* - * The notes should live in a SHT_NOTE segment and have "Xen" in the + * `incontents 200 elfnotes ELF notes + * + * The notes should live in a PT_NOTE segment and have "Xen" in the * name field. * * Numeric types are either 4 or 8 bytes depending on the content of @@ -22,6 +24,8 @@ * * String values (for non-legacy) are NULL terminated ASCII, also known * as ASCIZ type. + * + * Xen only uses ELF Notes contained in x86 binaries. */ /* @@ -52,7 +56,7 @@ #define XEN_ELFNOTE_VIRT_BASE 3 /* - * The offset of the ELF paddr field from the acutal required + * The offset of the ELF paddr field from the actual required * pseudo-physical address (numeric). * * This is used to maintain backwards compatibility with older kernels @@ -92,7 +96,12 @@ #define XEN_ELFNOTE_LOADER 8 /* - * The kernel supports PAE (x86/32 only, string = "yes" or "no"). + * The kernel supports PAE (x86/32 only, string = "yes", "no" or + * "bimodal"). + * + * For compatibility with Xen 3.0.3 and earlier the "bimodal" setting + * may be given as "yes,bimodal" which will cause older Xen to treat + * this kernel as PAE. * * LEGACY: PAE (n.b. The legacy interface included a provision to * indicate 'extended-cr3' support allowing L3 page tables to be @@ -149,7 +158,9 @@ * The (non-default) location the initial phys-to-machine map should be * placed at by the hypervisor (Dom0) or the tools (DomU). * The kernel must be prepared for this mapping to be established using - * large pages, despite such otherwise not being available to guests. + * large pages, despite such otherwise not being available to guests. Note + * that these large pages may be misaligned in PFN space (they'll obviously + * be aligned in MFN and virtual address spaces). * The kernel must also be able to handle the page table pages used for * this mapping not being accessible through the initial mapping. * (Only x86-64 supports this at present.) @@ -185,9 +196,81 @@ */ #define XEN_ELFNOTE_PHYS32_ENTRY 18 +/* + * Physical loading constraints for PVH kernels + * + * The presence of this note indicates the kernel supports relocating itself. + * + * The note may include up to three 32bit values to place constraints on the + * guest physical loading addresses and alignment for a PVH kernel. Values + * are read in the following order: + * - a required start alignment (default 0x200000) + * - a minimum address for the start of the image (default 0; see below) + * - a maximum address for the last byte of the image (default 0xffffffff) + * + * When this note specifies an alignment value, it is used. Otherwise the + * maximum p_align value from loadable ELF Program Headers is used, if it is + * greater than or equal to 4k (0x1000). Otherwise, the default is used. + */ +#define XEN_ELFNOTE_PHYS32_RELOC 19 + /* * The number of the highest elfnote defined. */ -#define XEN_ELFNOTE_MAX XEN_ELFNOTE_PHYS32_ENTRY +#define XEN_ELFNOTE_MAX XEN_ELFNOTE_PHYS32_RELOC + +/* + * System information exported through crash notes. + * + * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_INFO + * note in case of a system crash. This note will contain various + * information about the system, see xen/include/xen/elfcore.h. + */ +#define XEN_ELFNOTE_CRASH_INFO 0x1000001 + +/* + * System registers exported through crash notes. + * + * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_REGS + * note per cpu in case of a system crash. This note is architecture + * specific and will contain registers not saved in the "CORE" note. + * See xen/include/xen/elfcore.h for more information. + */ +#define XEN_ELFNOTE_CRASH_REGS 0x1000002 + + +/* + * xen dump-core none note. + * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_NONE + * in its dump file to indicate that the file is xen dump-core + * file. This note doesn't have any other information. + * See tools/libxc/xc_core.h for more information. + */ +#define XEN_ELFNOTE_DUMPCORE_NONE 0x2000000 + +/* + * xen dump-core header note. + * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_HEADER + * in its dump file. + * See tools/libxc/xc_core.h for more information. + */ +#define XEN_ELFNOTE_DUMPCORE_HEADER 0x2000001 + +/* + * xen dump-core xen version note. + * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_XEN_VERSION + * in its dump file. It contains the xen version obtained via the + * XENVER hypercall. + * See tools/libxc/xc_core.h for more information. + */ +#define XEN_ELFNOTE_DUMPCORE_XEN_VERSION 0x2000002 + +/* + * xen dump-core format version note. + * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION + * in its dump file. It contains a format version identifier. + * See tools/libxc/xc_core.h for more information. + */ +#define XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION 0x2000003 #endif /* __XEN_PUBLIC_ELFNOTE_H__ */