Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Only Panther cheetah+ chips have POPC.

1 files changed, 8 insertions, 2 deletions

diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 3e9daea1653d..3c5bb784214f 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -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;