Gerd Hoffmann 2069a63a8e OvmfPkg/PlatformInitLib: allow switching to 4-level paging ... There are a number of mostly older guests such as RHEL-7 which do not support 5-level paging. This patch adds support for switching from 5-level paging mode back to 4-level paging mode. This is done in PEI, after inspecting the address space needed (installed memory and reservations configured via fw_cfg). By default small guests (which need less than 1 TB) will use 4-level paging mode. There is a fw_cfg override though, so it is possible to force the one or the other this way: qemu-system-x86_64 -fw_cfg name=opt/org.tianocode/PagingLevel,string=5 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>		2024-08-30 22:13:44 +00:00
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Paging.nasm	OvmfPkg/PlatformInitLib: allow switching to 4-level paging	2024-08-30 22:13:44 +00:00