25 Mar
2020
25 Mar
'20
5:30 p.m.
On Wed, Mar 25, 2020 at 11:44:54AM +0800, Huacai Chen wrote:
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
arch/mips/mm/tlbex.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
applied to mips-next.
Thomas.
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