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| author | Huacai Chen <chenhc@lemote.com> | 2020-03-25 11:44:54 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-03-25 16:07:14 +0100 |
| commit | d191aaffe3687d1e73e644c185f5f0550ec242b5 (patch) | |
| tree | aeee5897da4b8cd2d3098e088c6faaa98637d192 /arch/mips/kernel/process.c | |
| parent | 78bdbbac08d7383b5c8a2b489ae789049704b046 (diff) | |
MIPS/tlbex: Fix LDDIR usage in setup_pw() for Loongson-3
LDDIR/LDPTE is Loongson-3's acceleration for Page Table Walking. If BD
(Base Directory, the 4th page directory) is not enabled, then GDOffset
is biased by BadVAddr[63:62]. So, if GDOffset (aka. BadVAddr[47:36] for
Loongson-3) is big enough, "0b11(BadVAddr[63:62])|BadVAddr[47:36]|...."
can far beyond pg_swapper_dir. This means the pg_swapper_dir may NOT be
accessed by LDDIR correctly, so fix it by set PWDirExt in CP0_PWCtl.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pei Huang <huangpei@loongson.cn>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/kernel/process.c')
0 files changed, 0 insertions, 0 deletions