In UEFI X64 we use other mechanisms to disable caching.
(CD/NW in CR0 and MTRRs.)
This fixes a slow boot issue with SVM.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14716 6f19259b-4bc3-4df7-8a09-765794883524
KVM has a bug that prevents using page tables in the ROM if the ROM
region utilizes the KVM READONLY memory feature. Therefore, we
avoid using page tables stored in the ROM.
Since OVMF doesn't require memory initialization, we just build
page table entries in RAM at 0x80000 very early in the OVMF boot
process. This address is just after the 'temp RAM' which is set
up by the SEC module.
Currently we only set up 4GB of page tables for OVMF's PEI,
but DxeIpl will build identity mapped page tables that cover all
of the available processor physical address space.
Reported-by: Gary Ching-Pang Lin <glin@suse.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14715 6f19259b-4bc3-4df7-8a09-765794883524
In some environments, the accessed bit should be set to allow the
global descriptor table (GDT) to reside in unmodifiable flash
memory.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9675 6f19259b-4bc3-4df7-8a09-765794883524
Previously it was:
ESI/RSI - SEC Core entry point
EDI/RDI - PEI Core entry point
EBP/RBP - Start of BFV
Now it is:
RAX/EAX Initial value of the EAX register
(BIST: Built-in Self Test)
DI 'BP': boot-strap processor, or
'AP': application processor
RBP/EBP Address of Boot Firmware Volume (BFV)
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9571 6f19259b-4bc3-4df7-8a09-765794883524
Previously the code would expect that the PE32 image was in the
first section of the FFS file. This might not be the case if the
PE32 section is forced to be aligned.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9331 6f19259b-4bc3-4df7-8a09-765794883524
Laszlo Ersek
Jordan Justen
geekboy15a
jljusten