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| author | Samuel Holland <samuel.holland@sifive.com> | 2024-02-27 03:34:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 17:35:33 +0300 |
| commit | ea6628e4e2353978af7e3b4ad4fdaab6149acf3d (patch) | |
| tree | 6a9d757e70c8dabd6520650ba299406b362ad69d /Documentation | |
| parent | efdcfa554b6eb228943ef1dd4d023c606be647d2 (diff) | |
| download | linux-ea6628e4e2353978af7e3b4ad4fdaab6149acf3d.tar.xz | |
riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
[ Upstream commit aea702dde7e9876fb00571a2602f25130847bf0f ]
commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear
mapping") added logic to allow using RAM below the kernel load address.
However, this does not work for NOMMU, where PAGE_OFFSET is fixed to the
kernel load address. Since that range of memory corresponds to PFNs
below ARCH_PFN_OFFSET, mm initialization runs off the beginning of
mem_map and corrupts adjacent kernel memory. Fix this by restoring the
previous behavior for NOMMU kernels.
Fixes: 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20240227003630.3634533-3-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions