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Commit a278d5c6 authored by Dimitris Vlachos's avatar Dimitris Vlachos Committed by Greg Kroah-Hartman
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riscv: Sparse-Memory/vmemmap out-of-bounds fix



[ Upstream commit a11dd49d ]

Offset vmemmap so that the first page of vmemmap will be mapped
to the first page of physical memory in order to ensure that
vmemmap’s bounds will be respected during
pfn_to_page()/page_to_pfn() operations.
The conversion macros will produce correct SV39/48/57 addresses
for every possible/valid DRAM_BASE inside the physical memory limits.

v2:Address Alex's comments

Suggested-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: default avatarDimitris Vlachos <dvlachos@ics.forth.gr>
Reported-by: default avatarDimitris Vlachos <dvlachos@ics.forth.gr>
Closes: https://lore.kernel.org/linux-riscv/20240202135030.42265-1-csd4492@csd.uoc.gr


Fixes: d95f1a54 ("RISC-V: Implement sparsemem")
Reviewed-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240229191723.32779-1-dvlachos@ics.forth.gr


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent eb257167
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