| Message ID | 20240624121723.2186279-1-stuart.menefy@codasip.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | d6a1928134a1c626ff369129d7a80951b2949a48 |
| Headers | show |
| Series | riscv: Remove redundant restriction on memory size | expand |
Hi Stuart, On 24/06/2024 14:17, Stuart Menefy wrote: > 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 <stuart.menefy@codasip.com> > --- > 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 7e25606f858a..3998d1ca369c 100644 > --- a/arch/riscv/mm/init.c > +++ b/arch/riscv/mm/init.c > @@ -1130,13 +1130,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) > 0UL : PAGE_OFFSET - kernel_map.phys_addr; > kernel_map.va_kernel_pa_offset = kernel_map.virt_addr - 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); I somehow totally missed this one, I guess this is the third fix you mentioned earlier right? This is correct so you can add: Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Thanks, Alex
Hello: This patch was applied to riscv/linux.git (for-next) by Palmer Dabbelt <palmer@rivosinc.com>: On Mon, 24 Jun 2024 13:17:23 +0100 you wrote: > 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 <stuart.menefy@codasip.com> > --- > arch/riscv/mm/init.c | 8 +------- > 1 file changed, 1 insertion(+), 7 deletions(-) Here is the summary with links: - riscv: Remove redundant restriction on memory size https://git.kernel.org/riscv/c/d6a1928134a1 You are awesome, thank you!
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 7e25606f858a..3998d1ca369c 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -1130,13 +1130,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) 0UL : PAGE_OFFSET - kernel_map.phys_addr; kernel_map.va_kernel_pa_offset = kernel_map.virt_addr - 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);
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 <stuart.menefy@codasip.com> --- arch/riscv/mm/init.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-)