On 1/5/26 12:26 PM, Sascha Hauer wrote: > Add PBL-specific memory remapping function that always uses page-wise > mapping (ARCH_MAP_FLAG_PAGEWISE) for fine-grained permissions on > adjacent ELF segments with different protection requirements. > > Wraps arch-specific __arch_remap_range() for ARMv7 (4KB pages) and > ARMv8 (page tables with BBM). Needed for ELF segment permission setup. > > Signed-off-by: Sascha Hauer <[email protected]>
Reviewed-by: Ahmad Fatoum <[email protected]> > --- > arch/arm/cpu/mmu_32.c | 7 +++++++ > arch/arm/cpu/mmu_64.c | 8 ++++++++ > include/mmu.h | 3 +++ > 3 files changed, 18 insertions(+) > > diff --git a/arch/arm/cpu/mmu_32.c b/arch/arm/cpu/mmu_32.c > index > 97c7107290ce95ddb21a322a5d0e74f3d324c528..86a55d165ba3cec5154c345a1a3a9cb959f0996f > 100644 > --- a/arch/arm/cpu/mmu_32.c > +++ b/arch/arm/cpu/mmu_32.c > @@ -435,6 +435,13 @@ static void early_remap_range(u32 addr, size_t size, > maptype_t map_type) > __arch_remap_range((void *)addr, addr, size, map_type); > } > > +void pbl_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, > + maptype_t map_type) > +{ > + __arch_remap_range(virt_addr, phys_addr, size, > + map_type | ARCH_MAP_FLAG_PAGEWISE); > +} > + > static bool pte_is_cacheable(uint32_t pte, int level) > { > return (level == 2 && (pte & PTE_CACHEABLE)) || > diff --git a/arch/arm/cpu/mmu_64.c b/arch/arm/cpu/mmu_64.c > index > afb3d2d7efd0bc7ecde1177d1544f54d751b5dc1..63faaa46703697e527eae766392e7ea7ae186b3d > 100644 > --- a/arch/arm/cpu/mmu_64.c > +++ b/arch/arm/cpu/mmu_64.c > @@ -282,6 +282,14 @@ static void early_remap_range(uint64_t addr, size_t > size, maptype_t map_type) > __arch_remap_range(addr, addr, size, map_type, false); > } > > +void pbl_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, > + maptype_t map_type) > +{ > + __arch_remap_range((uint64_t)virt_addr, phys_addr, > + (uint64_t)size, map_type | ARCH_MAP_FLAG_PAGEWISE, > + true); > +} > + > int arch_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, > maptype_t map_type) > { > map_type = arm_mmu_maybe_skip_permissions(map_type); > diff --git a/include/mmu.h b/include/mmu.h > index > 53603b7956c229b4c715c57b19d0398931eb2d6b..37df7b482e1d83e94e61997db6cf9834d8cf7f3c > 100644 > --- a/include/mmu.h > +++ b/include/mmu.h > @@ -64,6 +64,9 @@ static inline bool arch_can_remap(void) > } > #endif > > +void pbl_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, > + maptype_t map_type); > + > static inline int remap_range(void *start, size_t size, maptype_t map_type) > { > return arch_remap_range(start, virt_to_phys(start), size, map_type); > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
