Samuel Holland ea6628e4e2 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>

2024-05-02 16:35:33 +02:00

..

cache-ops.c

riscv: split cache ops out of dma-noncoherent.c

2023-11-07 09:37:42 -08:00

cacheflush.c

RISC-V: cacheflush: Initialize CBO variables on ACPI systems

2023-10-26 09:40:34 -07:00

context.c

riscv: mm: use bitmap_zero() API

2023-08-31 00:18:29 -07:00

dma-noncoherent.c

iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops()

2023-12-12 10:18:45 +01:00

extable.c

riscv: select DCACHE_WORD_ACCESS for efficient unaligned access HW

2024-01-09 20:18:20 -08:00

fault.c

RISC-V Patches for the 6.8 Merge Window, Part 1

2024-01-17 10:50:46 -08:00

hugetlbpage.c

riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION

2024-02-22 12:28:25 -08:00

init.c

riscv: Fix loading 64-bit NOMMU kernels past the start of RAM

2024-05-02 16:35:33 +02:00

kasan_init.c

percpu:

2024-01-18 15:01:28 -08:00

Makefile

riscv: mm: Only compile pgtable.c if MMU

2023-12-20 10:48:14 -08:00

pageattr.c

Merge remote-tracking branch 'palmer/fixes' into for-next

2024-01-09 20:10:32 -08:00

pgtable.c

riscv: Use accessors to page table entries instead of direct dereference

2023-12-20 10:48:15 -08:00

physaddr.c

riscv: Use PUD/P4D/PGD pages for the linear mapping

2023-04-18 20:43:04 -07:00

pmem.c

RISC-V: capitalise CMO op macros

2023-11-05 09:11:23 -08:00

ptdump.c

Merge patch series "Improve PTDUMP and introduce new fields"

2023-11-05 09:41:57 -08:00

tlbflush.c

riscv: mm: Fix prototype to avoid discarding const

2024-04-10 16:38:09 +02:00