On Thu, Nov 25, 2021 at 06:59:48PM +0800, Huang Pei wrote:
> It hangup when booting Loongson 3A1000 with BOTH
> CONFIG_PAGE_SIZE_64KB and CONFIG_MIPS_VA_BITS_48, that it turn
> out to use 2-level pgtable instead of 3-level. 64KB page size
> with 2-level pgtable only cover 42 bits VA, use 3-level pgtable
> to cover all 48 bits VA(55 bits)
>
> Fixes: 1e321fa917fb ("MIPS64: Support of at least 48 bits of SEGBITS)
> Signed-off-by: Huang Pei <huangpei@xxxxxxxxxxx>
> ---
> arch/mips/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index de60ad190057..0215dc1529e9 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -3097,7 +3097,7 @@ config STACKTRACE_SUPPORT
> config PGTABLE_LEVELS
> int
> default 4 if PAGE_SIZE_4KB && MIPS_VA_BITS_48
> - default 3 if 64BIT && !PAGE_SIZE_64KB
> + default 3 if 64BIT && (!PAGE_SIZE_64KB || MIPS_VA_BITS_48)
> default 2
>
> config MIPS_AUTO_PFN_OFFSET
> --
> 2.20.1
applied to mips-fixes.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
