Commit decebccd authored May 19, 2015 by James Hogan Committed by Ralf Baechle Jun 21, 2015

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>

parent 48269c78

arch/mips/lib/dump_tlb.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -67,6 +67,9 @@ static void dump_tlb(int first, int last)
	entrylo0 = read_c0_entrylo0();		entrylo0 = read_c0_entrylo0();
	entrylo1 = read_c0_entrylo1();		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		* Prior to tlbinv, unused entries have a virtual address of
	* CKSEG0.		* CKSEG0.