From 1a8e0da5937a6c87807083baa318cf8f98dac9aa Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 29 Aug 2011 21:14:29 -0700 Subject: [PATCH] sparc64: Only Panther cheetah+ chips have POPC. Signed-off-by: David S. Miller --- arch/sparc/kernel/setup_64.c | 10 ++++++++-- 1 file 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; -- 2.34.1