Bugzilla: https://bugzilla.tianocore.org/show_bug.cgi?id=1859 Repo: https://github.com/lersek/edk2.git Branch: exbar_mtrr_bz_1859
The fix (commit range 3b7a897cd8e3..39b9a5ffe661) for <https://bugzilla.tianocore.org/show_bug.cgi?id=1814> is technically correct, but it tickles an (arguably unjustified) assumption in QEMU the wrong way. For end users, this makes the original fix for TianoCore#1814 a regression, under certain circumstances. In theory, the assumption should be eliminated in QEMU, but in practice, that could be quite intrusive and/or take long. It seems possible to work around the problem in OVMF, satisfying the assumption again; for that, OVMF needs a different fix (and a different trade-off) for the original problem described in TianoCore#1814. Please see the detailed problem statement and the workaround's idea in TianoCore#1859. If possible, I'd like to get this into edk2-stable201905 (which we're postponing by two weeks anyway, for the sake of the OpenSSL 1.1.1b upgrade). Cc: Ard Biesheuvel <ard.biesheu...@linaro.org> Cc: Gerd Hoffmann <kra...@redhat.com> Cc: Jordan Justen <jordan.l.jus...@intel.com> Thanks, Laszlo Laszlo Ersek (6): Revert "OvmfPkg/PlatformPei: fix MTRR for low-RAM sizes that have many bits clear" Revert "OvmfPkg/PlatformPei: reorder the 32-bit PCI window vs. the PCIEXBAR on q35" Revert "OvmfPkg/PlatformPei: hoist PciBase assignment above the i440fx/q35 branching" Revert "OvmfPkg/PlatformPei: assign PciSize on both i440fx/q35 branches explicitly" OvmfPkg: raise the PCIEXBAR base to 2816 MB on Q35 OvmfPkg/PlatformPei: set 32-bit UC area at PciBase / PciExBarBase (pc/q35) OvmfPkg/OvmfPkgIa32.dsc | 5 +- OvmfPkg/OvmfPkgIa32X64.dsc | 5 +- OvmfPkg/OvmfPkgX64.dsc | 5 +- OvmfPkg/PlatformPei/Platform.h | 5 ++ OvmfPkg/PlatformPei/MemDetect.c | 70 +++++++++++++++----- OvmfPkg/PlatformPei/Platform.c | 17 +++-- 6 files changed, 80 insertions(+), 27 deletions(-) -- 2.19.1.3.g30247aa5d201 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#41624): https://edk2.groups.io/g/devel/message/41624 Mute This Topic: https://groups.io/mt/31834710/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
