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| author |   Nicholas Miehlbradt <nicholas@linux.ibm.com> | 2022-09-26 07:57:26 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:10 +1000 |
| commit | a5edf9815dd739fce660b4c8658f61b7d2517042 (patch) | |
| tree | ee622d9e25b2b4a10d9447c726e7c678ba7871bc /arch/powerpc/include/asm/interrupt.h | |
| parent | powerpc/64s: Allow double call of kernel_[un]map_linear_page() (diff) | |
| download | linux-dev-a5edf9815dd739fce660b4c8658f61b7d2517042.tar.xz linux-dev-a5edf9815dd739fce660b4c8658f61b7d2517042.zip | |
powerpc/64s: Enable KFENCE on book3s64
KFENCE support was added for ppc32 in commit 90cbac0e995d
("powerpc: Enable KFENCE for PPC32").
Enable KFENCE on ppc64 architecture with hash and radix MMUs.
It uses the same mechanism as debug pagealloc to
protect/unprotect pages. All KFENCE kunit tests pass on both
MMUs.
KFENCE memory is initially allocated using memblock but is
later marked as SLAB allocated. This necessitates the change
to __pud_free to ensure that the KFENCE pages are freed
appropriately.
Based on previous work by Christophe Leroy and Jordan Niethe.
Signed-off-by: Nicholas Miehlbradt <nicholas@linux.ibm.com>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220926075726.2846-4-nicholas@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/interrupt.h')
0 files changed, 0 insertions, 0 deletions