[PATCH 6/6] MIPS: Print GuestCtl1 on machine check exception

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The GuestCtl1 CP0 register can contain the GuestID used for root TLB
operations, which affects TLB matching. The other TLB registers are
already dumped out to the log on a machine check exception due to
multiple matching TLB entries, so also dump the value of the GuestCtl1
register if GuestIDs are supported.

Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
---
 arch/mips/lib/dump_tlb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
index 38642dda4e09..6b0458c150cb 100644
--- a/arch/mips/lib/dump_tlb.c
+++ b/arch/mips/lib/dump_tlb.c
@@ -19,6 +19,8 @@ void dump_tlb_regs(void)
 
 	pr_info("Index    : %0x\n", read_c0_index());
 	pr_info("PageMask : %0x\n", read_c0_pagemask());
+	if (cpu_has_guestid)
+		pr_info("GuestCtl1: %0x\n", read_c0_guestctl1());
 	pr_info("EntryHi  : %0*lx\n", field, read_c0_entryhi());
 	pr_info("EntryLo0 : %0*lx\n", field, read_c0_entrylo0());
 	pr_info("EntryLo1 : %0*lx\n", field, read_c0_entrylo1());
-- 
2.4.10





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