sparc64: Only Panther cheetah+ chips have POPC.
David S. Miller [Tue, 30 Aug 2011 04:14:29 +0000 (21:14 -0700)]
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/setup_64.c

index 3e9daea..3c5bb78 100644 (file)
@@ -440,8 +440,14 @@ static void __init init_sparc64_elf_hwcap(void)
                        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;