netdev - [PATCH 3/4] MIPS: use 3-level pgtable for 64KB page size on MIPS_VA_BITS

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Message-Id: <20211124035004.7871-4-huangpei@loongson.cn>
Date:   Wed, 24 Nov 2021 11:50:03 +0800
From:   Huang Pei <huangpei@...ngson.cn>
To:     netdev@...r.kernel.org, ambrosehua@...il.com
Cc:     linux-arch@...r.kernel.org
Subject: [PATCH 3/4] MIPS: use 3-level pgtable for 64KB page size on MIPS_VA_BITS_48

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@...ngson.cn>
---
 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