| Message ID | 20220627045833.1590055-4-anshuman.khandual@arm.com |
|---|---|
| State | New |
| Headers | show |
| Series | mm/mmap: Drop __SXXX/__PXXX macros from across platforms | expand |
Le 27/06/2022 à 06:58, Anshuman Khandual a écrit : > This moves protection_map[] inside the platform and while here, also enable > ARCH_HAS_VM_GET_PAGE_PROT on 32 bit and nohash 64 (aka book3e/64) platforms > via DECLARE_VM_GET_PAGE_PROT. > > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Nicholas Piggin <npiggin@gmail.com> > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> > --- > arch/powerpc/Kconfig | 2 +- > arch/powerpc/include/asm/pgtable.h | 20 +------------------- > arch/powerpc/mm/pgtable.c | 24 ++++++++++++++++++++++++ > 3 files changed, 26 insertions(+), 20 deletions(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index c2ce2e60c8f0..1035d172c7dd 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -140,7 +140,7 @@ config PPC > select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST > select ARCH_HAS_UACCESS_FLUSHCACHE > select ARCH_HAS_UBSAN_SANITIZE_ALL > - select ARCH_HAS_VM_GET_PAGE_PROT if PPC_BOOK3S_64 > + select ARCH_HAS_VM_GET_PAGE_PROT > select ARCH_HAVE_NMI_SAFE_CMPXCHG > select ARCH_KEEP_MEMBLOCK > select ARCH_MIGHT_HAVE_PC_PARPORT > diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h > index d564d0ecd4cd..33f4bf8d22b0 100644 > --- a/arch/powerpc/include/asm/pgtable.h > +++ b/arch/powerpc/include/asm/pgtable.h > @@ -20,25 +20,6 @@ struct mm_struct; > #include <asm/nohash/pgtable.h> > #endif /* !CONFIG_PPC_BOOK3S */ > > -/* Note due to the way vm flags are laid out, the bits are XWR */ > -#define __P000 PAGE_NONE > -#define __P001 PAGE_READONLY > -#define __P010 PAGE_COPY > -#define __P011 PAGE_COPY > -#define __P100 PAGE_READONLY_X > -#define __P101 PAGE_READONLY_X > -#define __P110 PAGE_COPY_X > -#define __P111 PAGE_COPY_X > - > -#define __S000 PAGE_NONE > -#define __S001 PAGE_READONLY > -#define __S010 PAGE_SHARED > -#define __S011 PAGE_SHARED > -#define __S100 PAGE_READONLY_X > -#define __S101 PAGE_READONLY_X > -#define __S110 PAGE_SHARED_X > -#define __S111 PAGE_SHARED_X > - > #ifndef __ASSEMBLY__ > > #ifndef MAX_PTRS_PER_PGD > @@ -79,6 +60,7 @@ extern void paging_init(void); > void poking_init(void); > > extern unsigned long ioremap_bot; > +extern const pgprot_t protection_map[16]; > > /* > * kern_addr_valid is intended to indicate whether an address is a valid > diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c > index e6166b71d36d..cb2dcdb18f8e 100644 > --- a/arch/powerpc/mm/pgtable.c > +++ b/arch/powerpc/mm/pgtable.c > @@ -472,3 +472,27 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, > return ret_pte; > } > EXPORT_SYMBOL_GPL(__find_linux_pte); > + > +/* Note due to the way vm flags are laid out, the bits are XWR */ > +const pgprot_t protection_map[16] = { > + [VM_NONE] = PAGE_NONE, > + [VM_READ] = PAGE_READONLY, > + [VM_WRITE] = PAGE_COPY, > + [VM_WRITE | VM_READ] = PAGE_COPY, > + [VM_EXEC] = PAGE_READONLY_X, > + [VM_EXEC | VM_READ] = PAGE_READONLY_X, > + [VM_EXEC | VM_WRITE] = PAGE_COPY_X, > + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_X, > + [VM_SHARED] = PAGE_NONE, > + [VM_SHARED | VM_READ] = PAGE_READONLY, > + [VM_SHARED | VM_WRITE] = PAGE_SHARED, > + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED, > + [VM_SHARED | VM_EXEC] = PAGE_READONLY_X, > + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_X, > + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED_X, > + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_X > +}; > + > +#ifndef CONFIG_PPC_BOOK3S_64 > +DECLARE_VM_GET_PAGE_PROT > +#endif
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c2ce2e60c8f0..1035d172c7dd 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -140,7 +140,7 @@ config PPC select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UACCESS_FLUSHCACHE select ARCH_HAS_UBSAN_SANITIZE_ALL - select ARCH_HAS_VM_GET_PAGE_PROT if PPC_BOOK3S_64 + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_KEEP_MEMBLOCK select ARCH_MIGHT_HAVE_PC_PARPORT diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index d564d0ecd4cd..33f4bf8d22b0 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -20,25 +20,6 @@ struct mm_struct; #include <asm/nohash/pgtable.h> #endif /* !CONFIG_PPC_BOOK3S */ -/* Note due to the way vm flags are laid out, the bits are XWR */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_X -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY_X -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_X -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED_X -#define __S111 PAGE_SHARED_X - #ifndef __ASSEMBLY__ #ifndef MAX_PTRS_PER_PGD @@ -79,6 +60,7 @@ extern void paging_init(void); void poking_init(void); extern unsigned long ioremap_bot; +extern const pgprot_t protection_map[16]; /* * kern_addr_valid is intended to indicate whether an address is a valid diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index e6166b71d36d..cb2dcdb18f8e 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -472,3 +472,27 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, return ret_pte; } EXPORT_SYMBOL_GPL(__find_linux_pte); + +/* Note due to the way vm flags are laid out, the bits are XWR */ +const pgprot_t protection_map[16] = { + [VM_NONE] = PAGE_NONE, + [VM_READ] = PAGE_READONLY, + [VM_WRITE] = PAGE_COPY, + [VM_WRITE | VM_READ] = PAGE_COPY, + [VM_EXEC] = PAGE_READONLY_X, + [VM_EXEC | VM_READ] = PAGE_READONLY_X, + [VM_EXEC | VM_WRITE] = PAGE_COPY_X, + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_X, + [VM_SHARED] = PAGE_NONE, + [VM_SHARED | VM_READ] = PAGE_READONLY, + [VM_SHARED | VM_WRITE] = PAGE_SHARED, + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED, + [VM_SHARED | VM_EXEC] = PAGE_READONLY_X, + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_X, + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED_X, + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_X +}; + +#ifndef CONFIG_PPC_BOOK3S_64 +DECLARE_VM_GET_PAGE_PROT +#endif
This moves protection_map[] inside the platform and while here, also enable ARCH_HAS_VM_GET_PAGE_PROT on 32 bit and nohash 64 (aka book3e/64) platforms via DECLARE_VM_GET_PAGE_PROT. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/pgtable.h | 20 +------------------- arch/powerpc/mm/pgtable.c | 24 ++++++++++++++++++++++++ 3 files changed, 26 insertions(+), 20 deletions(-)