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| author | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-31 03:38:42 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-08 14:17:43 +0300 |
| commit | 2c02e656a29d5f64193eb93da92781bcf0517146 (patch) | |
| tree | a3e9e24d033a50a1078ca6084075257f7b190b3c /arch/powerpc/mm/book3s64 | |
| parent | b56d55a5aa4aa9fc166595a7feb57f153ef7b555 (diff) | |
| download | linux-2c02e656a29d5f64193eb93da92781bcf0517146.tar.xz | |
powerpc/64s: Use htab_convert_pte_flags() in hash__mark_rodata_ro()
In hash__mark_rodata_ro() we pass the raw PP_RXXX value to
hash__change_memory_range(). That has the effect of setting the key to
zero, because PP_RXXX contains no key value.
Fix it by using htab_convert_pte_flags(), which knows how to convert a
pgprot into a pp value, including the key.
Fixes: d94b827e89dc ("powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Link: https://lore.kernel.org/r/20210331003845.216246-3-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/mm/book3s64')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_pgtable.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/mm/book3s64/hash_pgtable.c b/arch/powerpc/mm/book3s64/hash_pgtable.c index 567e0c6b3978..03819c259f0a 100644 --- a/arch/powerpc/mm/book3s64/hash_pgtable.c +++ b/arch/powerpc/mm/book3s64/hash_pgtable.c @@ -428,12 +428,14 @@ static bool hash__change_memory_range(unsigned long start, unsigned long end, void hash__mark_rodata_ro(void) { - unsigned long start, end; + unsigned long start, end, pp; start = (unsigned long)_stext; end = (unsigned long)__init_begin; - WARN_ON(!hash__change_memory_range(start, end, PP_RXXX)); + pp = htab_convert_pte_flags(pgprot_val(PAGE_KERNEL_ROX), HPTE_USE_KERNEL_KEY); + + WARN_ON(!hash__change_memory_range(start, end, pp)); } void hash__mark_initmem_nx(void) |