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linux/arch/x86/boot
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Joerg Roedel 22aa45cb46 x86/efi: Restore Firmware IDT before calling ExitBootServices() 
Commit

  79419e13e808 ("x86/boot/compressed/64: Setup IDT in startup_32 boot path")

introduced an IDT into the 32-bit boot path of the decompressor stub.
But the IDT is set up before ExitBootServices() is called, and some UEFI
firmwares rely on their own IDT.

Save the firmware IDT on boot and restore it before calling into EFI
functions to fix boot failures introduced by above commit.

Fixes: 79419e13e808 ("x86/boot/compressed/64: Setup IDT in startup_32 boot path")
Reported-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Cc: stable@vger.kernel.org # 5.13+
Link: https://lkml.kernel.org/r/20210820125703.32410-1-joro@8bytes.org
2021-08-21 17:57:04 +02:00
..
compressed
x86/efi: Restore Firmware IDT before calling ExitBootServices()
2021-08-21 17:57:04 +02:00
tools
x86/build: Declutter the build output
2020-08-20 08:17:40 +02:00
.gitignore
x86/boot: Modernize genimage script; hdimage+EFI support
2021-05-10 12:27:50 +02:00
a20.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
apm.c
x86/boot: Fix comment spelling
2020-03-17 20:52:52 +01:00
bioscall.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83
2019-05-24 17:37:52 +02:00
bitops.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
boot.h
x86/boot: Use common BUILD_BUG_ON
2019-08-16 14:15:50 +02:00
cmdline.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
copy.S
x86/asm: Do not annotate functions with GLOBAL
2019-10-18 11:25:58 +02:00
cpu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
cpucheck.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
cpuflags.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpuflags.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ctype.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
early_serial_console.c
x86: Clean up 'sizeof x' => 'sizeof(x)'
2018-10-29 07:13:28 +01:00
edd.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
genimage.sh
x86/boot: Modernize genimage script; hdimage+EFI support
2021-05-10 12:27:50 +02:00
header.S
x86: Bump ZO_z_extra_bytes margin for zstd
2020-07-31 11:49:08 +02:00
install.sh
…
main.c
x86/boot: Use common BUILD_BUG_ON
2019-08-16 14:15:50 +02:00
Makefile
x86/boot: Modernize genimage script; hdimage+EFI support
2021-05-10 12:27:50 +02:00
memory.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
mkcpustr.c
x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_*
2020-01-13 18:36:02 +01:00
mtools.conf.in
x86/boot: Modernize genimage script; hdimage+EFI support
2021-05-10 12:27:50 +02:00
pm.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
pmjump.S
x86/asm: Do not annotate functions with GLOBAL
2019-10-18 11:25:58 +02:00
printf.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
regs.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83
2019-05-24 17:37:52 +02:00
setup.ld
x86/boot: Add .text.* to setup.ld
2020-08-14 12:52:35 +02:00
string.c
x86/boot: Add kstrtoul() from lib/
2020-05-04 15:19:07 +02:00
string.h
x86/boot/compressed: Use builtin mem functions for decompressor
2020-08-19 11:23:45 -07:00
tty.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
version.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
vesa.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48
2019-05-24 17:27:13 +02:00
video-bios.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
video-mode.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
video-vesa.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
video-vga.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
video.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
2019-06-19 17:09:53 +02:00
video.h
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00