Introduce XenResetVector, a copy of OvmfPkg/ResetVector, with one
changes:
- SEC_DEFAULT_CR0: enable cache (bit 30 or CD set to 0)
Xen copies the OVMF code to RAM, there is no need to disable cache.
This new module will later be modified to add a new entry point, more
detail in a following commit "OvmfPkg/XenResetVector: Add new entry point
for Xen PVH"
Value FILE_GUID of XenResetVector have not changed compare to ResetVector
because it is a special value (gEfiFirmwareVolumeTopFileGuid).
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD
Reviewed-by: Laszlo Ersek
---
Notes:
v4:
- Update Maintainers.txt
v3:
- Added gEfiFirmwareVolumeTopFileGuid to the commit message.
- rebased: SPDX
OvmfPkg/OvmfXen.dsc | 2 +-
OvmfPkg/OvmfXen.fdf | 2 +-
OvmfPkg/XenResetVector/XenResetVector.inf | 38 +
Maintainers.txt | 1 +
.../XenResetVector/Ia16/Real16ToFlat32.asm| 134
OvmfPkg/XenResetVector/Ia32/PageTables64.asm | 149 ++
OvmfPkg/XenResetVector/XenResetVector.nasmb | 68
7 files changed, 392 insertions(+), 2 deletions(-)
create mode 100644 OvmfPkg/XenResetVector/XenResetVector.inf
create mode 100644 OvmfPkg/XenResetVector/Ia16/Real16ToFlat32.asm
create mode 100644 OvmfPkg/XenResetVector/Ia32/PageTables64.asm
create mode 100644 OvmfPkg/XenResetVector/XenResetVector.nasmb
diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index f224ac32b4..1a0e59f0cc 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -495,7 +495,7 @@ [PcdsDynamicDefault]
#
[Components]
- OvmfPkg/ResetVector/ResetVector.inf
+ OvmfPkg/XenResetVector/XenResetVector.inf
#
# SEC Phase modules
diff --git a/OvmfPkg/OvmfXen.fdf b/OvmfPkg/OvmfXen.fdf
index f59647fd14..6fc8479aae 100644
--- a/OvmfPkg/OvmfXen.fdf
+++ b/OvmfPkg/OvmfXen.fdf
@@ -118,7 +118,7 @@ [FV.SECFV]
#
INF OvmfPkg/Sec/SecMain.inf
-INF RuleOverride=RESET_VECTOR OvmfPkg/ResetVector/ResetVector.inf
+INF RuleOverride=RESET_VECTOR OvmfPkg/XenResetVector/XenResetVector.inf
[FV.PEIFV]
diff --git a/OvmfPkg/XenResetVector/XenResetVector.inf
b/OvmfPkg/XenResetVector/XenResetVector.inf
new file mode 100644
index 00..097fc9b5b4
--- /dev/null
+++ b/OvmfPkg/XenResetVector/XenResetVector.inf
@@ -0,0 +1,38 @@
+## @file
+# Reset Vector
+#
+# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.
+# Copyright (c) 2019, Citrix Systems, Inc.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION= 0x00010005
+ BASE_NAME = XenResetVector
+ FILE_GUID = 1BA0062E-C779-4582-8566-336AE8F78F09
+ MODULE_TYPE= SEC
+ VERSION_STRING = 1.1
+
+#
+# The following information is for reference only and not required by the
build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64
+#
+
+[Sources]
+ XenResetVector.nasmb
+
+[Packages]
+ OvmfPkg/OvmfPkg.dec
+ MdePkg/MdePkg.dec
+ UefiCpuPkg/UefiCpuPkg.dec
+
+[BuildOptions]
+ *_*_IA32_NASMB_FLAGS = -I$(WORKSPACE)/UefiCpuPkg/ResetVector/Vtf0/
+ *_*_X64_NASMB_FLAGS = -I$(WORKSPACE)/UefiCpuPkg/ResetVector/Vtf0/
+
+[Pcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesSize
diff --git a/Maintainers.txt b/Maintainers.txt
index 98f6d828eb..34bdb275b4 100644
--- a/Maintainers.txt
+++ b/Maintainers.txt
@@ -380,6 +380,7 @@ F: OvmfPkg/SmbiosPlatformDxe/*Xen.c
F: OvmfPkg/XenBusDxe/
F: OvmfPkg/XenIoPciDxe/
F: OvmfPkg/XenPvBlkDxe/
+F: OvmfPkg/XenResetVector/
R: Anthony Perard
R: Julien Grall
diff --git a/OvmfPkg/XenResetVector/Ia16/Real16ToFlat32.asm
b/OvmfPkg/XenResetVector/Ia16/Real16ToFlat32.asm
new file mode 100644
index 00..5c329bfaea
--- /dev/null
+++ b/OvmfPkg/XenResetVector/Ia16/Real16ToFlat32.asm
@@ -0,0 +1,134 @@
+;--
+; @file
+; Transition from 16 bit real mode into 32 bit flat protected mode
+;
+; Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.
+; Copyright (c) 2019, Citrix Systems, Inc.
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;--
+
+%define SEC_DEFAULT_CR0 0x0023
+%define SEC_DEFAULT_CR4 0x640
+
+BITS16
+
+;
+; Modified: EAX, EBX
+;
+; @param[out] DS Selector allowing flat access to all addresses
+; @param[out] ES Selector allowing flat access to all addresses
+; @param[out] FS Selector allowing flat access to all addresses
+; @param[out] GS Selector allowing flat access to all addresses
+;
