[SPARC64]: Fix some SUN4V TLB handling bugs.

1) Add error return checking for TLB load hypervisor
   calls.

2) Don't fallthru to dtlb tsb miss handler from itlb tsb
   miss handler, oops.

3) On window fixups, propagate fault information to fixup
   handler correctly.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S
index 7996c9d66702..a17259cf34b8 100644
--- a/arch/sparc64/kernel/tsb.S
+++ b/arch/sparc64/kernel/tsb.S
@@ -135,8 +135,8 @@ tsb_do_fault:
         wrpr            %g5, PSTATE_AG | PSTATE_MG, %pstate
         .section        .sun4v_2insn_patch, "ax"
         .word           661b
-        nop
-        nop
+        SET_GL(1)
+        ldxa            [%g0] ASI_SCRATCHPAD, %g2
         .previous
 
         bne,pn          %xcc, tsb_do_itlb_fault
@@ -150,7 +150,7 @@ tsb_do_dtlb_fault:
         ldxa    [%g4] ASI_DMMU, %g5
         .section .sun4v_2insn_patch, "ax"
         .word   661b
-        mov     %g4, %g5
+        ldx     [%g2 + HV_FAULT_D_ADDR_OFFSET], %g5
         nop
         .previous