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powerpc/book3e: redefine pte_mkprivileged() and pte_mkuser()

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Book3e defines both _PAGE_USER and _PAGE_PRIVILEGED, so the nohash
default pte_mkprivileged() and pte_mkuser() are not usable.

This patch redefines them for book3e.

In theorie, only pte_mkprivileged() needs to be redefined because
_PAGE_USER includes _PAGE_PRIVILEGED, but it is less confusing
to redefine both.

Fixes: a0da4bc166f2 ("powerpc/mm: Allow platforms to redefine some helpers")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-17 13:03:22 +00:00 committed by Michael Ellerman
parent b9fb4480a3
commit bde1a1335c
1 changed files with 16 additions and 0 deletions
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16
arch/powerpc/include/asm/nohash/pte-book3e.h
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@ -104,5 +104,21 @@
#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER)
#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
#ifndef __ASSEMBLY__
static inline pte_t pte_mkprivileged(pte_t pte)
{
return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED);
}
#define pte_mkprivileged pte_mkprivileged
static inline pte_t pte_mkuser(pte_t pte)
{
return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER);
}
#define pte_mkuser pte_mkuser
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_NOHASH_PTE_BOOK3E_H */