[PATCH v4 04/11] riscv: mm: Refactor create_linear_mapping_range() for memory hot add

Björn Töpel
2024-06-05T11:41:33Z

Add a parameter to the direct map setup function, so it can be used in
arch_add_memory() later.

Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
---
arch/riscv/mm/init.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 0dd04cedc0d2..1f7e7c223bec 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1232,7 +1232,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
}

static void __meminit create_linear_mapping_range(phys_addr_t start, phys_addr_t end,
- uintptr_t fixed_map_size)
+ uintptr_t fixed_map_size, const pgprot_t *pgprot)
{
phys_addr_t pa;
uintptr_t va, map_size;
@@ -1243,7 +1243,7 @@ static void __meminit create_linear_mapping_range(phys_addr_t start, phys_addr_t
best_map_size(pa, va, end - pa);

create_pgd_mapping(swapper_pg_dir, va, pa, map_size,
- pgprot_from_va(va));
+ pgprot ? *pgprot : pgprot_from_va(va));
}
}

@@ -1287,22 +1287,19 @@ static void __init create_linear_mapping_page_table(void)
if (end >= __pa(PAGE_OFFSET) + memory_limit)
end = __pa(PAGE_OFFSET) + memory_limit;

- create_linear_mapping_range(start, end, 0);
+ create_linear_mapping_range(start, end, 0, NULL);
}

#ifdef CONFIG_STRICT_KERNEL_RWX
- create_linear_mapping_range(ktext_start, ktext_start + ktext_size, 0);
- create_linear_mapping_range(krodata_start,
- krodata_start + krodata_size, 0);
+ create_linear_mapping_range(ktext_start, ktext_start + ktext_size, 0, NULL);
+ create_linear_mapping_range(krodata_start, krodata_start + krodata_size, 0, NULL);

memblock_clear_nomap(ktext_start, ktext_size);
memblock_clear_nomap(krodata_start, krodata_size);
#endif

#ifdef CONFIG_KFENCE
- create_linear_mapping_range(kfence_pool,
- kfence_pool + KFENCE_POOL_SIZE,
- PAGE_SIZE);
+ create_linear_mapping_range(kfence_pool, kfence_pool + KFENCE_POOL_SIZE, PAGE_SIZE, NULL);

memblock_clear_nomap(kfence_pool, KFENCE_POOL_SIZE);
#endif
--
2.43.0