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@xxxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Cc: linux-mips@xxxxxxxxxxxxxx --- arch/mips/lib/dump_tlb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c index 70e0a6bdb322..f58962c11c75 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. -- 2.3.6
