From: Min M Xu <min.m.xu@intel.com>
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4172
This patch moves the TDX APs nasm code from SecEntry.nasm to
IntelTdxAPs.nasm. IntelTdxX64 and OvmfPkgX64 use the same nasm so that
it can be easier to be managed. In the following patch there will be
AcceptMemory related changes in IntelTdxAPs.nasm.
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
---
OvmfPkg/IntelTdx/Sec/X64/IntelTdxAPs.nasm | 58 +++++++++++++++++++++++
OvmfPkg/IntelTdx/Sec/X64/SecEntry.nasm | 58 ++---------------------
OvmfPkg/Sec/X64/SecEntry.nasm | 58 ++---------------------
3 files changed, 68 insertions(+), 106 deletions(-)
create mode 100644 OvmfPkg/IntelTdx/Sec/X64/IntelTdxAPs.nasm
diff --git a/OvmfPkg/IntelTdx/Sec/X64/IntelTdxAPs.nasm b/OvmfPkg/IntelTdx/Sec/X64/IntelTdxAPs.nasm
new file mode 100644
index 000000000000..034ac0ee9421
--- /dev/null
+++ b/OvmfPkg/IntelTdx/Sec/X64/IntelTdxAPs.nasm
@@ -0,0 +1,58 @@
+;------------------------------------------------------------------------------
+; @file
+; Intel TDX APs
+;
+; Copyright (c) 2021 - 2022, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+%include "TdxCommondefs.inc"
+
+ ;
+ ; Note: BSP never gets here. APs will be unblocked by DXE
+ ;
+ ; R8 [31:0] NUM_VCPUS
+ ; [63:32] MAX_VCPUS
+ ; R9 [31:0] VCPU_INDEX
+ ;
+ParkAp:
+
+do_wait_loop:
+ ;
+ ; register itself in [rsp + CpuArrivalOffset]
+ ;
+ mov rax, 1
+ lock xadd dword [rsp + CpuArrivalOffset], eax
+ inc eax
+
+.check_arrival_cnt:
+ cmp eax, r8d
+ je .check_command
+ mov eax, dword[rsp + CpuArrivalOffset]
+ jmp .check_arrival_cnt
+
+.check_command:
+ mov eax, dword[rsp + CommandOffset]
+ cmp eax, MpProtectedModeWakeupCommandNoop
+ je .check_command
+
+ cmp eax, MpProtectedModeWakeupCommandWakeup
+ je .do_wakeup
+
+ ; Don't support this command, so ignore
+ jmp .check_command
+
+.do_wakeup:
+ ;
+ ; BSP sets these variables before unblocking APs
+ ; RAX: WakeupVectorOffset
+ ; RBX: Relocated mailbox address
+ ; RBP: vCpuId
+ ;
+ mov rax, 0
+ mov eax, dword[rsp + WakeupVectorOffset]
+ mov rbx, [rsp + WakeupArgsRelocatedMailBox]
+ nop
+ jmp rax
+ jmp $
diff --git a/OvmfPkg/IntelTdx/Sec/X64/SecEntry.nasm b/OvmfPkg/IntelTdx/Sec/X64/SecEntry.nasm
index 4528fec309a0..5a38c4213916 100644
--- a/OvmfPkg/IntelTdx/Sec/X64/SecEntry.nasm
+++ b/OvmfPkg/IntelTdx/Sec/X64/SecEntry.nasm
@@ -10,7 +10,6 @@
;------------------------------------------------------------------------------
#include <Base.h>
-%include "TdxCommondefs.inc"
DEFAULT REL
SECTION .text
@@ -49,6 +48,7 @@ ASM_PFX(_ModuleEntryPoint):
cmp byte[eax], VM_GUEST_TYPE_TDX
jne InitStack
+ %define TDCALL_TDINFO 1
mov rax, TDCALL_TDINFO
tdcall
@@ -62,7 +62,9 @@ ASM_PFX(_ModuleEntryPoint):
mov rax, r9
and rax, 0xffff
test rax, rax
- jne ParkAp
+ jz InitStack
+ mov rsp, FixedPcdGet32 (PcdOvmfSecGhcbBackupBase)
+ jmp ParkAp
InitStack:
@@ -98,54 +100,4 @@ InitStack:
sub rsp, 0x20
call ASM_PFX(SecCoreStartupWithStack)
- ;
- ; Note: BSP never gets here. APs will be unblocked by DXE
- ;
- ; R8 [31:0] NUM_VCPUS
- ; [63:32] MAX_VCPUS
- ; R9 [31:0] VCPU_INDEX
- ;
-ParkAp:
-
- mov rbp, r9
-
-.do_wait_loop:
- mov rsp, FixedPcdGet32 (PcdOvmfSecGhcbBackupBase)
-
- ;
- ; register itself in [rsp + CpuArrivalOffset]
- ;
- mov rax, 1
- lock xadd dword [rsp + CpuArrivalOffset], eax
- inc eax
-
-.check_arrival_cnt:
- cmp eax, r8d
- je .check_command
- mov eax, dword[rsp + CpuArrivalOffset]
- jmp .check_arrival_cnt
-
-.check_command:
- mov eax, dword[rsp + CommandOffset]
- cmp eax, MpProtectedModeWakeupCommandNoop
- je .check_command
-
- cmp eax, MpProtectedModeWakeupCommandWakeup
- je .do_wakeup
-
- ; Don't support this command, so ignore
- jmp .check_command
-
-.do_wakeup:
- ;
- ; BSP sets these variables before unblocking APs
- ; RAX: WakeupVectorOffset
- ; RBX: Relocated mailbox address
- ; RBP: vCpuId
- ;
- mov rax, 0
- mov eax, dword[rsp + WakeupVectorOffset]
- mov rbx, [rsp + WakeupArgsRelocatedMailBox]
- nop
- jmp rax
- jmp $
+%include "IntelTdxAPs.nasm"
diff --git a/OvmfPkg/Sec/X64/SecEntry.nasm b/OvmfPkg/Sec/X64/SecEntry.nasm
index 4528fec309a0..0f82051720da 100644
--- a/OvmfPkg/Sec/X64/SecEntry.nasm
+++ b/OvmfPkg/Sec/X64/SecEntry.nasm
@@ -10,7 +10,6 @@
;------------------------------------------------------------------------------
#include <Base.h>
-%include "TdxCommondefs.inc"
DEFAULT REL
SECTION .text
@@ -49,6 +48,7 @@ ASM_PFX(_ModuleEntryPoint):
cmp byte[eax], VM_GUEST_TYPE_TDX
jne InitStack
+ %define TDCALL_TDINFO 1
mov rax, TDCALL_TDINFO
tdcall
@@ -62,7 +62,9 @@ ASM_PFX(_ModuleEntryPoint):
mov rax, r9
and rax, 0xffff
test rax, rax
- jne ParkAp
+ jz InitStack
+ mov rsp, FixedPcdGet32 (PcdOvmfSecGhcbBackupBase)
+ jmp ParkAp
InitStack:
@@ -98,54 +100,4 @@ InitStack:
sub rsp, 0x20
call ASM_PFX(SecCoreStartupWithStack)
- ;
- ; Note: BSP never gets here. APs will be unblocked by DXE
- ;
- ; R8 [31:0] NUM_VCPUS
- ; [63:32] MAX_VCPUS
- ; R9 [31:0] VCPU_INDEX
- ;
-ParkAp:
-
- mov rbp, r9
-
-.do_wait_loop:
- mov rsp, FixedPcdGet32 (PcdOvmfSecGhcbBackupBase)
-
- ;
- ; register itself in [rsp + CpuArrivalOffset]
- ;
- mov rax, 1
- lock xadd dword [rsp + CpuArrivalOffset], eax
- inc eax
-
-.check_arrival_cnt:
- cmp eax, r8d
- je .check_command
- mov eax, dword[rsp + CpuArrivalOffset]
- jmp .check_arrival_cnt
-
-.check_command:
- mov eax, dword[rsp + CommandOffset]
- cmp eax, MpProtectedModeWakeupCommandNoop
- je .check_command
-
- cmp eax, MpProtectedModeWakeupCommandWakeup
- je .do_wakeup
-
- ; Don't support this command, so ignore
- jmp .check_command
-
-.do_wakeup:
- ;
- ; BSP sets these variables before unblocking APs
- ; RAX: WakeupVectorOffset
- ; RBX: Relocated mailbox address
- ; RBP: vCpuId
- ;
- mov rax, 0
- mov eax, dword[rsp + WakeupVectorOffset]
- mov rbx, [rsp + WakeupArgsRelocatedMailBox]
- nop
- jmp rax
- jmp $
+%include "../../IntelTdx/Sec/X64/IntelTdxAPs.nasm"
--
2.29.2.windows.2
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