diff options
| author | Tom Rini <trini@konsulko.com> | 2025-03-14 09:31:36 -0600 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-03-14 09:31:36 -0600 |
| commit | 973c366ce68d9a99e16bcbce3941a1c52492c097 (patch) | |
| tree | 4551686cc38c7e419c833ebfeaf6bd6843124691 /include | |
| parent | bbfabe290138d76e78e0dac28fec93c32e3964eb (diff) | |
| parent | fb553201b67aededdc794f3a0880e386771cbd58 (diff) | |
Merge tag 'mmu-next-14032025' of https://source.denx.de/u-boot/custodians/u-boot-tpm into next
Up to now we configure the entire memory space for U-Boot as RWX.
For modern architectures and security requirements, it's better to
map the memory properly.
This pull request adds basics support for mapping the U-Boot binary with
proper (RO, RW, RW^X) memory permissions on aarch64 right after we
relocate U-Boot in the top of DRAM.
It's worrth noting that the linker script annotations are only added for
the aarch64 architecture. We can, in the future, try to unify the linker --
at least for the architectures that have enough in common and expand this
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/sections.h | 2 | ||||
| -rw-r--r-- | include/cpu_func.h | 17 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index 3fd5c772a1a..024b1adde27 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -23,6 +23,7 @@ extern char __kprobes_text_start[], __kprobes_text_end[]; extern char __entry_text_start[], __entry_text_end[]; extern char __initdata_begin[], __initdata_end[]; extern char __start_rodata[], __end_rodata[]; +extern char __start_data[], __end_data[]; extern char __efi_helloworld_begin[]; extern char __efi_helloworld_end[]; extern char __efi_var_file_begin[]; @@ -63,6 +64,7 @@ static inline int arch_is_kernel_data(unsigned long addr) /* Start of U-Boot text region */ extern char __text_start[]; +extern char __text_end[]; /* This marks the text region which must be relocated */ extern char __image_copy_start[], __image_copy_end[]; diff --git a/include/cpu_func.h b/include/cpu_func.h index 7e81c4364a7..70a41ead3f7 100644 --- a/include/cpu_func.h +++ b/include/cpu_func.h @@ -69,6 +69,23 @@ void flush_dcache_range(unsigned long start, unsigned long stop); void invalidate_dcache_range(unsigned long start, unsigned long stop); void invalidate_dcache_all(void); void invalidate_icache_all(void); + +enum pgprot_attrs { + MMU_ATTR_RO, + MMU_ATTR_RX, + MMU_ATTR_RW, +}; + +/** pgprot_set_attrs() - Set page table permissions + * + * @addr: Physical address start + * @size: size of memory to change + * @perm: New permissions + * + * Return: 0 on success, error otherwise. + **/ +int pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm); + /** * noncached_init() - Initialize non-cached memory region * |