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17 August 2024, 15:42:30 UTC
Revision 7e3811521dc3934e2ecae8458676fc4a1f62bf9f authored by Alexandre Ghiti on 25 July 2023, 13:22:46 UTC, committed by Palmer Dabbelt on 10 August 2023, 15:54:29 UTC 
riscv: Implement flush_cache_vmap()
 
The RISC-V kernel needs a sfence.vma after a page table modification: we
used to rely on the vmalloc fault handling to emit an sfence.vma, but
commit 7d3332be011e ("riscv: mm: Pre-allocate PGD entries for
vmalloc/modules area") got rid of this path for 64-bit kernels, so now we
need to explicitly emit a sfence.vma in flush_cache_vmap().

Note that we don't need to implement flush_cache_vunmap() as the generic
code should emit a flush tlb after unmapping a vmalloc region.

Fixes: 7d3332be011e ("riscv: mm: Pre-allocate PGD entries for vmalloc/modules area")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230725132246.817726-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
1 parent d566bea
History
Tip revision: 7e3811521dc3934e2ecae8458676fc4a1f62bf9f authored by Alexandre Ghiti on 25 July 2023, 13:22:46 UTC
riscv: Implement flush_cache_vmap()
Tip revision: 7e38115
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