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| author | Ard Biesheuvel <ardb@kernel.org> | 2019-12-24 14:29:09 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-12-25 10:46:07 +0100 |
| commit | 4911ee401b7ceff8f38e0ac597cbf503d71e690c (patch) | |
| tree | e7aac326086466d51f3d67b74ea3f76cdf771f47 /drivers/net/dsa/sja1105/sja1105_static_config.c | |
| parent | 818c7ce724770fbcdcd43725c81f2b3535f82b76 (diff) | |
| download | linux-4911ee401b7ceff8f38e0ac597cbf503d71e690c.tar.bz2 | |
x86/efistub: Disable paging at mixed mode entry
The EFI mixed mode entry code goes through the ordinary startup_32()
routine before jumping into the kernel's EFI boot code in 64-bit
mode. The 32-bit startup code must be entered with paging disabled,
but this is not documented as a requirement for the EFI handover
protocol, and so we should disable paging explicitly when entering
the kernel from 32-bit EFI firmware.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: <stable@vger.kernel.org>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Hans de Goede <hdegoede@redhat.com>
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: https://lkml.kernel.org/r/20191224132909.102540-4-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/net/dsa/sja1105/sja1105_static_config.c')
0 files changed, 0 insertions, 0 deletions