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authorJames Hogan <james.hogan@imgtec.com>2015-05-19 09:50:36 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-06-21 21:52:36 +0200
commitdecebccd76e4da9bb096962c230b6ed740606e49 (patch)
tree28c00bcd0620525b43689728f88bdfa0a4a41f8f /arch/mips/lib
parent48269c78fb04a84b4d190cac8e1fbf24ded53505 (diff)
downloadtalos-op-linux-decebccd76e4da9bb096962c230b6ed740606e49.tar.gz
talos-op-linux-decebccd76e4da9bb096962c230b6ed740606e49.zip
MIPS: dump_tlb: Take EHINV bit into account
The EHINV bit in EntryHi allows a TLB entry to be properly marked invalid so that EntryHi doesn't have to be set to a unique value to avoid machine check exceptions due to multiple matching entries. Unfortunately dump_tlb() doesn't take this into account so it will print all the uninteresting invalid TLB entries if the current ASID happens to be 00. Therefore add a condition to skip entries which are marked invalid with the EHINV bit. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10076/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib')
-rw-r--r--arch/mips/lib/dump_tlb.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
index 995c393e3342..3bcdd53c832f 100644
--- a/arch/mips/lib/dump_tlb.c
+++ b/arch/mips/lib/dump_tlb.c
@@ -67,6 +67,9 @@ static void dump_tlb(int first, int last)
entrylo0 = read_c0_entrylo0();
entrylo1 = read_c0_entrylo1();
+ /* EHINV bit marks entire entry as invalid */
+ if (cpu_has_tlbinv && entryhi & MIPS_ENTRYHI_EHINV)
+ continue;
/*
* Prior to tlbinv, unused entries have a virtual address of
* CKSEG0.
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