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| author | Huacai Chen <chenhc@lemote.com> | 2020-03-25 11:44:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-17 10:48:47 +0200 |
| commit | 67dea3c78e6eb05f27c606400349efbf829bc249 (patch) | |
| tree | f8216a7581cba56349b2482312eb0158761062ec /include/linux/init_task.h | |
| parent | 76b48e986967d4c6536d09f99fb932829242e747 (diff) | |
MIPS/tlbex: Fix LDDIR usage in setup_pw() for Loongson-3
commit d191aaffe3687d1e73e644c185f5f0550ec242b5 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/init_task.h')
0 files changed, 0 insertions, 0 deletions