commit 1a8e0da5937a6c87807083baa318cf8f98dac9aa
author David S. Miller <davem@davemloft.net> Mon Aug 29 21:14:29 2011 -0700
committer David S. Miller <davem@davemloft.net> Mon Aug 29 21:14:29 2011 -0700
tree 2fabd3b97a5c13c04614ecfea23ad19cc0431626
parent 0f43dd546d991ca260d8a72d07f617907c508de8

sparc64: Only Panther cheetah+ chips have POPC.

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

arch/sparc/kernel/setup_64.c

diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 3e9daea..3c5bb78 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -440,8 +440,14 @@
 			cap |= AV_SPARC_VIS;
 		if (tlb_type == cheetah || tlb_type == cheetah_plus)
 			cap |= AV_SPARC_VIS | AV_SPARC_VIS2;
-		if (tlb_type == cheetah_plus)
-			cap |= AV_SPARC_POPC;
+		if (tlb_type == cheetah_plus) {
+			unsigned long impl, ver;
+
+			__asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
+			impl = ((ver >> 32) & 0xffff);
+			if (impl == PANTHER_IMPL)
+				cap |= AV_SPARC_POPC;
+		}
 		if (tlb_type == hypervisor) {
 			if (sun4v_chip_type == SUN4V_CHIP_NIAGARA1)
 				cap |= AV_SPARC_ASI_BLK_INIT;