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mike.travis@hpe.com 77dd0afe57 efi/uga: Fix PCIe LER when GRUB2 accesses non-enabled MMIO data from VGA
A GPU inserted into a PCIe I/O slot disappears during system startup.
The problem centers around GRUB and a specific VGA init function in
efi_uga.c. This causes an LER (Link Error Recorvery) because the MMIO
memory has not been enabled before attempting access.

The fix is to add the same coding used in other VGA drivers, specifically
to add a check to insure that it is indeed a VGA controller. And then
enable the MMIO address space with the specific bits.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-09-21 12:16:25 -04:00
asm-tests asm-tests/i386-pc: Check that movl is 5 bytes. 2016-09-28 20:31:04 +03:00
build-aux Autogenerate ChangeLog from git changelog. 2015-01-24 17:29:50 +01:00
conf Add support for device-tree-based drivers. 2020-09-21 11:32:45 -04:00
docs grub-mkconfig/10_linux: Support multiple early initrd images 2020-09-21 12:16:25 -04:00
grub-core efi/uga: Fix PCIe LER when GRUB2 accesses non-enabled MMIO data from VGA 2020-09-21 12:16:25 -04:00
include ieee1275: split up grub_machine_get_bootlocation 2020-09-21 12:16:25 -04:00
m4 update m4/extern-inline.m4 to upstream version to fix compilation on FreeBSD 2015-03-05 19:25:56 +03:00
po po: Use @SHELL@ rather than /bin/sh. 2020-09-21 11:32:45 -04:00
tests grub-fs-tester: Fix bashism 2020-09-21 12:02:37 -04:00
themes/starfield Starfield theme. 2012-02-23 17:21:38 +01:00
unicode * unicode: Import Unicode 6.0 data. 2011-12-25 16:17:25 +01:00
util grub-mkconfig/10_linux: Support multiple early initrd images 2020-09-21 12:16:25 -04:00
.gitignore Merge remote-tracking branch 'upstream/master' 2017-01-23 14:02:45 -08:00
ABOUT-NLS automake commit without merge history 2010-05-06 11:34:04 +05:30
acinclude.m4 Fix -nopie/-nopie check. 2017-01-30 19:38:55 +01:00
AUTHORS 2005-09-03 Yoshinori K. Okuji <okuji@enbug.org> 2005-09-03 16:54:27 +00:00
autogen.sh autogen: Use cp instead of ln -s. 2015-11-08 18:45:57 +01:00
BUGS * BUGS: New file. 2011-01-11 00:06:01 +01:00
ChangeLog-2015 Autogenerate ChangeLog from git changelog. 2015-01-24 17:29:50 +01:00
config.h.in Remove libgcc dependency. 2015-03-03 20:50:37 +01:00
configure.ac Set have_exec to y on cygwin so we have grub_mkrescue. 2020-09-21 12:02:37 -04:00
COPYING 2007-07-22 Yoshinori K. Okuji <okuji@enbug.org> 2007-07-21 23:32:33 +00:00
coreboot.cfg * coreboot.cfg: Add missing file. 2013-11-20 00:52:23 +01:00
geninit.sh automake commit without merge history 2010-05-06 11:34:04 +05:30
gentpl.py arm_coreboot: Support EHCI. 2020-09-21 11:32:45 -04:00
INSTALL INSTALL: Fix mention of thumb-clang. 2017-02-02 01:11:52 +01:00
linguas.sh linguas: Don't skip ko.po. 2017-02-04 00:06:57 +01:00
Makefile.am Use core2duo for bootcheck test on 64-bit EFI. 2017-03-15 09:20:14 +01:00
Makefile.util.def Merge remote-tracking branch 'upstream/master' 2017-01-23 14:02:45 -08:00
NEWS NEWS updates 2016-11-22 20:51:54 +03:00
README README: Remove dead link to the wiki 2015-11-06 04:31:23 +01:00
THANKS 2009-12-11 Robert Millan <rmh.grub@aybabtu.com> 2009-12-11 22:44:47 +00:00
TODO TODO: Remove obsolete link 2016-02-12 17:51:52 +01:00

This is GRUB 2, the second version of the GRand Unified Bootloader.
GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more
robust, more powerful, and more portable.

See the file NEWS for a description of recent changes to GRUB 2.

See the file INSTALL for instructions on how to build and install the
GRUB 2 data and program files.

Please visit the official web page of GRUB 2, for more information.
The URL is <http://www.gnu.org/software/grub/grub.html>.

More extensive documentation is available in the Info manual,
accessible using 'info grub' after building and installing GRUB 2.

There are a number of important user-visible differences from the
first version of GRUB, now known as GRUB Legacy. For a summary, please
see:

  info grub Introduction 'Changes from GRUB Legacy'