From d6a1928134a1c626ff369129d7a80951b2949a48 Mon Sep 17 00:00:00 2001 From: Stuart Menefy Date: Mon, 24 Jun 2024 13:17:23 +0100 Subject: [PATCH] riscv: Remove redundant restriction on memory size The original reason for reserving the top 4GiB of the direct map (space for modules/BPF/kernel) hasn't applied since the address map was reworked for KASAN. Signed-off-by: Stuart Menefy Reviewed-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20240624121723.2186279-1-stuart.menefy@codasip.com Signed-off-by: Palmer Dabbelt --- arch/riscv/mm/init.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index f43139db82a9..0e56725377a4 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -1132,13 +1132,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) kernel_map.va_pa_offset = IS_ENABLED(CONFIG_64BIT) ? 0UL : PAGE_OFFSET - kernel_map.phys_addr; - /* - * The default maximal physical memory size is KERN_VIRT_SIZE for 32-bit - * kernel, whereas for 64-bit kernel, the end of the virtual address - * space is occupied by the modules/BPF/kernel mappings which reduces - * the available size of the linear mapping. - */ - memory_limit = KERN_VIRT_SIZE - (IS_ENABLED(CONFIG_64BIT) ? SZ_4G : 0); + memory_limit = KERN_VIRT_SIZE; /* Sanity check alignment and size */ BUG_ON((PAGE_OFFSET % PGDIR_SIZE) != 0); -- 2.25.1