[SPARC64]: Fix tl1 trap state capture/dump on SUN4V.

No trap levels above 2 in privileged mode on SUN4V.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/etrap.S b/arch/sparc64/kernel/etrap.S
index a0e7d480e5dc..149383835c25 100644
--- a/arch/sparc64/kernel/etrap.S
+++ b/arch/sparc64/kernel/etrap.S
@@ -188,6 +188,11 @@ etraptl1:	/* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself.
                 rdpr    %tt, %g3
                 stx     %g3, [%g2 + STACK_BIAS + 0x38]
 
+                sethi   %hi(is_sun4v), %g3
+                lduw    [%g3 + %lo(is_sun4v)], %g3
+                brnz,pn %g3, finish_tl1_capture
+                 nop
+
                 wrpr    %g0, 3, %tl
                 rdpr    %tstate, %g3
                 stx     %g3, [%g2 + STACK_BIAS + 0x40]
@@ -210,6 +215,7 @@ etraptl1:	/* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself.
 
                 stx     %g1, [%g2 + STACK_BIAS + 0x80]
 
+finish_tl1_capture:
                 wrpr    %g0, 1, %tl
 661:            nop
                 .section .sun4v_1insn_patch, "ax"