diff options
| author | Marc Zyngier <[email protected]> | 2021-07-13 19:43:26 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <[email protected]> | 2021-07-16 18:05:49 +0200 |
| commit | 2bab693a608bdf614b9fcd44083c5100f34b9f77 (patch) | |
| tree | f9a500115f1d2e1bca8452575eacc4eddb0576b0 /drivers/fpga/fpga-mgr.c | |
| parent | 674a9f1f6815849bfb5bf385e7da8fc198aaaba9 (diff) | |
firmware/efi: Tell memblock about EFI iomem reservations
kexec_load_file() relies on the memblock infrastructure to avoid
stamping over regions of memory that are essential to the survival
of the system.
However, nobody seems to agree how to flag these regions as reserved,
and (for example) EFI only publishes its reservations in /proc/iomem
for the benefit of the traditional, userspace based kexec tool.
On arm64 platforms with GICv3, this can result in the payload being
placed at the location of the LPI tables. Shock, horror!
Let's augment the EFI reservation code with a memblock_reserve() call,
protecting our dear tables from the secondary kernel invasion.
Reported-by: Moritz Fischer <[email protected]>
Tested-by: Moritz Fischer <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Cc: [email protected]
Cc: Ard Biesheuvel <[email protected]>
Cc: James Morse <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions