linux_dsm_epyc7002/drivers/firmware/efi
Hans de Goede 52e1cf2d19 efi/libstub/tpm: Initialize efi_physical_addr_t vars to zero for mixed mode
Commit:

  79832f0b5f ("efi/libstub/tpm: Initialize pointer variables to zero for mixed mode")

fixes a problem with the tpm code on mixed mode (64-bit kernel on 32-bit UEFI),
where 64-bit pointer variables are not fully initialized by the 32-bit EFI code.

A similar problem applies to the efi_physical_addr_t variables which
are written by the ->get_event_log() EFI call. Even though efi_physical_addr_t
is 64-bit everywhere, it seems that some 32-bit UEFI implementations only
fill in the lower 32 bits when passed a pointer to an efi_physical_addr_t
to fill.

This commit initializes these to 0 to, to ensure the upper 32 bits are
0 in mixed mode. This fixes recent kernels sometimes hanging during
early boot on mixed mode UEFI systems.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: <stable@vger.kernel.org> # v4.16+
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180622064222.11633-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-06-22 10:58:27 +02:00
..
libstub efi/libstub/tpm: Initialize efi_physical_addr_t vars to zero for mixed mode 2018-06-22 10:58:27 +02:00
test
apple-properties.c
arm-init.c treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX 2018-06-15 07:55:25 +09:00
arm-runtime.c
capsule-loader.c
capsule.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
cper-arm.c
cper-x86.c
cper.c
dev-path-parser.c
efi-bgrt.c
efi-pstore.c pstore: Convert internal records to timespec64 2018-06-05 16:57:31 -07:00
efi.c
efibc.c
efivars.c
esrt.c
fake_mem.c
Kconfig
Makefile
memattr.c
memmap.c
reboot.c
runtime-map.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
runtime-wrappers.c
tpm.c
vars.c