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57648adb31
linux/arch/x86/platform
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Ard Biesheuvel 57648adb31 efi/x86: Preserve %ebx correctly in efi_set_virtual_address_map() 
Commit:

  59f2a619a2 ("efi: Add 'runtime' pointer to struct efi")

modified the assembler routine called by efi_set_virtual_address_map(),
to grab the 'runtime' EFI service pointer while running with paging
disabled (which is tricky to do in C code)

After the change, register %ebx is not restored correctly, resulting
in all kinds of weird behavior, so fix that.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200304133515.15035-1-ardb@kernel.org
Link: https://lore.kernel.org/r/20200308080859.21568-22-ardb@kernel.org
2020-03-08 09:58:23 +01:00
..
atom Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
ce4100 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
efi efi/x86: Preserve %ebx correctly in efi_set_virtual_address_map() 2020-03-08 09:58:23 +01:00
geode Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 17:49:45 -07:00
goldfish treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
intel x86/platform/intel/iosf_mbi Rewrite locking 2019-08-19 20:52:39 +02:00
intel-mid drm/gma500: Pass GPIO for Intel MID using descriptors 2019-12-14 00:26:10 +01:00
intel-quark x86/platform/intel/quark: Explicitly include linux/io.h for virt_to_phys() 2019-12-10 10:15:47 +01:00
iris treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 70 2019-05-24 17:36:47 +02:00
olpc - Core Frameworks 2019-12-01 16:16:31 -08:00
pvh x86/asm: Make some functions local 2019-10-18 11:34:39 +02:00
scx200 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
sfi x86: Use pr_warn instead of pr_warning 2019-10-18 15:00:18 +02:00
ts5500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
uv proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00