MIRRORS/linux-imx
1
0
Fork 0
mirror of https://github.com/nxp-imx/linux-imx.git synced 2025-07-06 17:35:20 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

riscv: Do not restrict memory size because of linear mapping on nommu

Browse Source 
[ Upstream commit 5f771088a2 ]

It makes no sense to restrict physical memory size because of linear
mapping size constraints when there is no linear mapping, so only do
that when mmu is enabled.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Closes: https://lore.kernel.org/linux-riscv/CAMuHMdW0bnJt5GMRtOZGkTiM7GK4UaLJCDMF_Ouq++fnDKi3_A@mail.gmail.com/
Fixes: 3b6564427a ("riscv: Fix linear mapping checks for non-contiguous memory regions")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240827065230.145021-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexandre Ghiti 2024-08-27 08:52:30 +02:00 committed by Greg Kroah-Hartman
parent 8289dc916e
commit bd29d84520
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/riscv/mm/init.c
View File

@ -235,7 +235,7 @@ static void __init setup_bootmem(void)
* The size of the linear page mapping may restrict the amount of * The size of the linear page mapping may restrict the amount of
* usable RAM. * usable RAM.
*/ */
if (IS_ENABLED(CONFIG_64BIT)) { if (IS_ENABLED(CONFIG_64BIT) && IS_ENABLED(CONFIG_MMU)) {
max_mapped_addr = __pa(PAGE_OFFSET) + KERN_VIRT_SIZE; max_mapped_addr = __pa(PAGE_OFFSET) + KERN_VIRT_SIZE;
memblock_cap_memory_range(phys_ram_base, memblock_cap_memory_range(phys_ram_base,
max_mapped_addr - phys_ram_base); max_mapped_addr - phys_ram_base);