mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-02 13:03:28 +01:00
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/** @file
|
|
Define the FIRST_SMI_HANDLER_CONTEXT structure, which is an exchange area
|
|
between the SMM Monarch and the hot-added CPU, for relocating the SMBASE of
|
|
the hot-added CPU.
|
|
|
|
Copyright (c) 2020, Red Hat, Inc.
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
**/
|
|
|
|
#ifndef FIRST_SMI_HANDLER_CONTEXT_H_
|
|
#define FIRST_SMI_HANDLER_CONTEXT_H_
|
|
|
|
//
|
|
// The following structure is used to communicate between the SMM Monarch
|
|
// (running the root MMI handler) and the hot-added CPU (handling its first
|
|
// SMI). It is placed at SMM_DEFAULT_SMBASE, which is in SMRAM under QEMU's
|
|
// "SMRAM at default SMBASE" feature.
|
|
//
|
|
#pragma pack (1)
|
|
typedef struct {
|
|
//
|
|
// When ApicIdGate is MAX_UINT64, then no hot-added CPU may proceed with
|
|
// SMBASE relocation.
|
|
//
|
|
// Otherwise, the hot-added CPU whose APIC ID equals ApicIdGate may proceed
|
|
// with SMBASE relocation.
|
|
//
|
|
// This field is intentionally wider than APIC_ID (UINT32) because we need a
|
|
// "gate locked" value that is different from all possible APIC_IDs.
|
|
//
|
|
UINT64 ApicIdGate;
|
|
//
|
|
// The new SMBASE value for the hot-added CPU to set in the SMRAM Save State
|
|
// Map, before leaving SMM with the RSM instruction.
|
|
//
|
|
UINT32 NewSmbase;
|
|
//
|
|
// The hot-added CPU sets this field to 1 right before executing the RSM
|
|
// instruction. This tells the SMM Monarch to proceed to polling the last
|
|
// byte of the normal RAM reserved page (Post-SMM Pen).
|
|
//
|
|
UINT8 AboutToLeaveSmm;
|
|
} FIRST_SMI_HANDLER_CONTEXT;
|
|
#pragma pack ()
|
|
|
|
#endif // FIRST_SMI_HANDLER_CONTEXT_H_
|