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powerpc: Implement and use pgprot_nx()

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ioremap_page_range() calls pgprot_nx() vmap() and vmap_pfn()
clear execute permission by calling pgprot_nx().

When pgprot_nx() is not defined it falls back to a nop.

Implement it for powerpc then use it in early_ioremap_range().

Then the call to pte_exprotect() can be removed from ioremap_prot().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/5993a7a097e989af1c97fc4a6c011fefc67dbe6e.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:35 +02:00
committed by Michael Ellerman
parent 4c8dd6c987
commit d3c0dfcfc9
2 changed files with 8 additions and 3 deletions
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6
arch/powerpc/include/asm/pgtable.h
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@@ -71,6 +71,12 @@ static inline pgprot_t pte_pgprot(pte_t pte)
return __pgprot(pte_flags);
}
static inline pgprot_t pgprot_nx(pgprot_t prot)
{
return pte_pgprot(pte_exprotect(__pte(pgprot_val(prot))));
}
#define pgprot_nx pgprot_nx
#ifndef pmd_page_vaddr
static inline const void *pmd_page_vaddr(pmd_t pmd)
{