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ArmVirtPkg/ArmVirtQemu: enable initial ID map at early boot 

Now that we have all the pieces in place, switch the AArch64 version of
ArmVirtQemu to a mode where the first thing it does out of reset is
enable a preliminary ID map that covers the NOR flash and sufficient
DRAM to create the UEFI page tables as usual.

The advantage of this is that no manipulation of memory occurs any
longer before the MMU is enabled, which removes the need for explicit
coherency management, which is cumbersome and bad for performance.

It also means we no longer need to build all components that may execute
with the MMU off (including BASE libraries) with strict alignment.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2022-07-02 19:27:37 +02:00 committed by mergify[bot]
parent a26050f74d
commit 07be1d34d9
2 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ArmVirtPkg/ArmVirtQemu.dsc
View File

@ -64,8 +64,6 @@
QemuFwCfgSimpleParserLib|OvmfPkg/Library/QemuFwCfgSimpleParserLib/QemuFwCfgSimpleParserLib.inf
QemuLoadImageLib|OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.inf
ArmPlatformLib|ArmPlatformPkg/Library/ArmPlatformLibNull/ArmPlatformLibNull.inf
TimerLib|ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.inf
NorFlashPlatformLib|ArmVirtPkg/Library/NorFlashQemuLib/NorFlashQemuLib.inf
@ -93,6 +91,12 @@
TpmPlatformHierarchyLib|SecurityPkg/Library/PeiDxeTpmPlatformHierarchyLibNull/PeiDxeTpmPlatformHierarchyLib.inf
!endif
[LibraryClasses.AARCH64]
ArmPlatformLib|ArmVirtPkg/Library/ArmPlatformLibQemu/ArmPlatformLibQemu.inf
[LibraryClasses.ARM]
ArmPlatformLib|ArmPlatformPkg/Library/ArmPlatformLibNull/ArmPlatformLibNull.inf
[LibraryClasses.common.PEIM]
ArmVirtMemInfoLib|ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoPeiLib.inf
@ -113,6 +117,8 @@
UefiScsiLib|MdePkg/Library/UefiScsiLib/UefiScsiLib.inf
[BuildOptions]
GCC:*_*_AARCH64_CC_XIPFLAGS = -mno-strict-align
!include NetworkPkg/NetworkBuildOptions.dsc.inc
################################################################################
@ -311,7 +317,12 @@
PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
}
ArmPlatformPkg/PlatformPei/PlatformPeim.inf
ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.inf
ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf {
<LibraryClasses>
!if $(ARCH) == AARCH64
ArmMmuLib|ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf
!endif
}
ArmPkg/Drivers/CpuPei/CpuPei.inf
MdeModulePkg/Universal/Variable/Pei/VariablePei.inf

2
ArmVirtPkg/ArmVirtQemu.fdf
View File

@ -107,7 +107,7 @@ READ_LOCK_STATUS = TRUE
INF ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf
INF MdeModulePkg/Core/Pei/PeiMain.inf
INF ArmPlatformPkg/PlatformPei/PlatformPeim.inf
INF ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.inf
INF ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
INF ArmPkg/Drivers/CpuPei/CpuPei.inf
INF MdeModulePkg/Universal/PCD/Pei/Pcd.inf
INF MdeModulePkg/Universal/Variable/Pei/VariablePei.inf