diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-20 14:07:15 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-27 13:03:34 +1000 |
| commit | edfe1a5679263827ff94eb478c6ee0d65d467adf (patch) | |
| tree | e3e205e075f89b39b9b4974b9212391f402707cd /arch/powerpc/mm/ioremap.c | |
| parent | 4634c375db7a082b2522621519a5fb6eba977584 (diff) | |
powerpc/mm: move ioremap_prot() into ioremap.c
Both ioremap_prot() are idenfical, move them into ioremap.c
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0b3eb0e0f1490a99fd6c983e166fb8946233f151.1566309262.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/mm/ioremap.c')
| -rw-r--r-- | arch/powerpc/mm/ioremap.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/mm/ioremap.c b/arch/powerpc/mm/ioremap.c index 7f1d462e7745..3d388aaa3ee6 100644 --- a/arch/powerpc/mm/ioremap.c +++ b/arch/powerpc/mm/ioremap.c @@ -34,3 +34,22 @@ void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size) return iowa_ioremap(addr, size, prot, caller); return __ioremap_caller(addr, size, prot, caller); } + +void __iomem *ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags) +{ + pte_t pte = __pte(flags); + void *caller = __builtin_return_address(0); + + /* writeable implies dirty for kernel addresses */ + if (pte_write(pte)) + pte = pte_mkdirty(pte); + + /* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */ + pte = pte_exprotect(pte); + pte = pte_mkprivileged(pte); + + if (iowa_is_active()) + return iowa_ioremap(addr, size, pte_pgprot(pte), caller); + return __ioremap_caller(addr, size, pte_pgprot(pte), caller); +} +EXPORT_SYMBOL(ioremap_prot); |