projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 51a6fb41 LE |
1 | /** @file\r |
| 2 | Define the FIRST_SMI_HANDLER_CONTEXT structure, which is an exchange area\r | |
| 3 | between the SMM Monarch and the hot-added CPU, for relocating the SMBASE of\r | |
| 4 | the hot-added CPU.\r | |
| 5 | \r | |
| 6 | Copyright (c) 2020, Red Hat, Inc.\r | |
| 7 | \r | |
| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 9 | **/\r | |
| 10 | \r | |
| 11 | #ifndef FIRST_SMI_HANDLER_CONTEXT_H_\r | |
| 12 | #define FIRST_SMI_HANDLER_CONTEXT_H_\r | |
| 13 | \r | |
| 14 | //\r | |
| 15 | // The following structure is used to communicate between the SMM Monarch\r | |
| 16 | // (running the root MMI handler) and the hot-added CPU (handling its first\r | |
| 17 | // SMI). It is placed at SMM_DEFAULT_SMBASE, which is in SMRAM under QEMU's\r | |
| 18 | // "SMRAM at default SMBASE" feature.\r | |
| 19 | //\r | |
| 20 | #pragma pack (1)\r | |
| 21 | typedef struct {\r | |
| 22 | //\r | |
| 23 | // When ApicIdGate is MAX_UINT64, then no hot-added CPU may proceed with\r | |
| 24 | // SMBASE relocation.\r | |
| 25 | //\r | |
| 26 | // Otherwise, the hot-added CPU whose APIC ID equals ApicIdGate may proceed\r | |
| 27 | // with SMBASE relocation.\r | |
| 28 | //\r | |
| 29 | // This field is intentionally wider than APIC_ID (UINT32) because we need a\r | |
| 30 | // "gate locked" value that is different from all possible APIC_IDs.\r | |
| 31 | //\r | |
| ac0a286f | 32 | UINT64 ApicIdGate;\r |
| 51a6fb41 LE |
33 | //\r |
| 34 | // The new SMBASE value for the hot-added CPU to set in the SMRAM Save State\r | |
| 35 | // Map, before leaving SMM with the RSM instruction.\r | |
| 36 | //\r | |
| ac0a286f | 37 | UINT32 NewSmbase;\r |
| 51a6fb41 LE |
38 | //\r |
| 39 | // The hot-added CPU sets this field to 1 right before executing the RSM\r | |
| 40 | // instruction. This tells the SMM Monarch to proceed to polling the last\r | |
| 41 | // byte of the normal RAM reserved page (Post-SMM Pen).\r | |
| 42 | //\r | |
| ac0a286f | 43 | UINT8 AboutToLeaveSmm;\r |
| 51a6fb41 LE |
44 | } FIRST_SMI_HANDLER_CONTEXT;\r |
| 45 | #pragma pack ()\r | |
| 46 | \r | |
| 47 | #endif // FIRST_SMI_HANDLER_CONTEXT_H_\r |