In comment 17, Krupp confirmed that even current-ish upstream
(d8e36289cef7, "EmbeddedPkg: add driver to set graphical/serial console
preference", 2017-10-20) was broken for them; so I was definitely off
with my LP#1715700 parallel. Sorry about that.
The bisection thus far has narrowed down the introduction of the issue
to the following commits:
git log --oneline --reverse --no-decorate c50596a70143..5659ec3fa913 \
| cat -n
1 3d4361663276 MMC : Added missing __FUNCTION__ macro.
2 ea21f1d98dcc SD : Updated CMD 6 implememtation.
3 3281ebb4ae7d Nt32Pkg: Clean up DSC to remove unnecessary build
option in SecMain
4 eed3f7130522 MdeModulePkg/AtaAtapiPassThru: cache
EnabledPciAttributes
5 509daa658b79 MdeModulePkg/AtaAtapiPassThru: unmap DMA buffers
after disabling BM DMA
6 6fb8ddd36bde MdeModulePkg/AtaAtapiPassThru: disable the device
at ExitBootServices()
7 5659ec3fa913 OvmfPkg/VirtioBlkDxe: don't unmap VRING at
ExitBootServices()
I don't see how patches #1 through #3 could be relevant.
Patch #7 is a no-op in non-SEV guests.
Patches #4 through #6 are also from yours truly. I wonder if patch #6:
https://github.com/tianocore/edk2/commit/6fb8ddd36bde
tickles something in QEMU 2.10 that makes the IDE controller unusable to
Windows.
I don't think that edk2 commit 6fb8ddd36bde is broken; disabling bus
master DMA at ExitBootServices() is valid. The commit been used on
physical ATA controllers as well, since its introduction.
Given that I can't see anything suspicious and/or invalid in the above
edk2 commit range, I suggest that -- after the current edk2 bisection is
completed -- we bisect QEMU between 2.8 and 2.10, using the package
ovmf_0-20170911.5dfba97c-1_all.deb
In comment #1 Dann stated he could *not* reproduce the issue. Was that
perhaps because Krupp used IDE but Dann used virtio? Krupp, can you
please provide your exact QEMU command line and/or libvirt domain XML?
Thanks.
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https://bugs.launchpad.net/bugs/1725560
Title:
OVMF UEFI firmware causes Windows 10 w/ GPU passthrough to not boot
after upgrade
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