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MIPS: use 3-level pgtable for 64KB page size on MIPS_VA_BITS_48

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[ Upstream commit 41ce097f71 ]

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: 1e321fa917 ("MIPS64: Support of at least 48 bits of SEGBITS)
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huang Pei 2021-11-25 18:59:48 +08:00 committed by Greg Kroah-Hartman
parent 63e8aabe1f
commit fa0255f14a
1 changed files with 1 additions and 1 deletions
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2
arch/mips/Kconfig
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@ -2990,7 +2990,7 @@ config HAVE_LATENCYTOP_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
source "init/Kconfig"