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authorDavid S. Miller <davem@davemloft.net>2011-08-29 21:14:29 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-03 11:40:02 -0700
commitf7ae5caa73f0f1b226da2dae7403e7d12d58db26 (patch)
tree23364e1107f8127125de3d3f1e1e86d683fb90e2 /arch/sparc
parent94dea7201a65816b802d8c8b8b0877590fd67d7e (diff)
sparc64: Only Panther cheetah+ chips have POPC.
commit 1a8e0da5937a6c87807083baa318cf8f98dac9aa upstream. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/setup_64.c10
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;