projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 0547ffbf MX |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ; @file\r | |
| 3 | ; Intel TDX APs\r | |
| 4 | ;\r | |
| 5 | ; Copyright (c) 2021 - 2022, Intel Corporation. All rights reserved.<BR>\r | |
| 6 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 7 | ;\r | |
| 8 | ;------------------------------------------------------------------------------\r | |
| 9 | \r | |
| 10 | %include "TdxCommondefs.inc"\r | |
| 11 | \r | |
| 12 | ;\r | |
| 13 | ; Note: BSP never gets here. APs will be unblocked by DXE\r | |
| 14 | ;\r | |
| 15 | ; R8 [31:0] NUM_VCPUS\r | |
| 16 | ; [63:32] MAX_VCPUS\r | |
| 17 | ; R9 [31:0] VCPU_INDEX\r | |
| 18 | ;\r | |
| 19 | ParkAp:\r | |
| 20 | \r | |
| 21 | do_wait_loop:\r | |
| 22 | ;\r | |
| 23 | ; register itself in [rsp + CpuArrivalOffset]\r | |
| 24 | ;\r | |
| 25 | mov rax, 1\r | |
| 26 | lock xadd dword [rsp + CpuArrivalOffset], eax\r | |
| 27 | inc eax\r | |
| 28 | \r | |
| 29 | .check_arrival_cnt:\r | |
| 30 | cmp eax, r8d\r | |
| 31 | je .check_command\r | |
| 32 | mov eax, dword[rsp + CpuArrivalOffset]\r | |
| 33 | jmp .check_arrival_cnt\r | |
| 34 | \r | |
| 35 | .check_command:\r | |
| 36 | mov eax, dword[rsp + CommandOffset]\r | |
| 37 | cmp eax, MpProtectedModeWakeupCommandNoop\r | |
| 38 | je .check_command\r | |
| 39 | \r | |
| 40 | cmp eax, MpProtectedModeWakeupCommandWakeup\r | |
| 41 | je .do_wakeup\r | |
| 42 | \r | |
| 43 | ; Don't support this command, so ignore\r | |
| 44 | jmp .check_command\r | |
| 45 | \r | |
| 46 | .do_wakeup:\r | |
| 47 | ;\r | |
| 48 | ; BSP sets these variables before unblocking APs\r | |
| 49 | ; RAX: WakeupVectorOffset\r | |
| 50 | ; RBX: Relocated mailbox address\r | |
| 51 | ; RBP: vCpuId\r | |
| 52 | ;\r | |
| 53 | mov rax, 0\r | |
| 54 | mov eax, dword[rsp + WakeupVectorOffset]\r | |
| 55 | mov rbx, [rsp + WakeupArgsRelocatedMailBox]\r | |
| 56 | nop\r | |
| 57 | jmp rax\r | |
| 58 | jmp $\r |