diff options
| author | Andre Przywara <andre.przywara@amd.com> | 2012-10-31 17:20:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-11 13:38:04 -0700 |
| commit | 1183e651202ae381263309f6f122e0bf1234b5e2 (patch) | |
| tree | 5b4cb133b19dc561a3aa02e219193756a4052263 /arch | |
| parent | dadd72be605e99445bedfacce8d07a85ac84eb41 (diff) | |
Revert "x86, amd: Disable way access filter on Piledriver CPUs" it is duplicated
Revert 5e3fe67e02c53e5a5fcf0e2b0d91dd93f757d50b which is
commit 2bbf0a1427c377350f001fbc6260995334739ad7 upstream.
Willy pointed out that I messed up and applied this one twice to the
3.0-stable tree, so revert the second instance of it.
Reported by: Willy Tarreau <w@1wt.eu>
Cc: Andre Przywara <osp@andrep.de>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: CAI Qian <caiqian@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
reverted:
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index a93741d8de78..3f4b6dacf1c2 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -568,20 +568,6 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) } } - /* - * The way access filter has a performance penalty on some workloads. - * Disable it on the affected CPUs. - */ - if ((c->x86 == 0x15) && - (c->x86_model >= 0x02) && (c->x86_model < 0x20)) { - u64 val; - - if (!rdmsrl_safe(0xc0011021, &val) && !(val & 0x1E)) { - val |= 0x1E; - checking_wrmsrl(0xc0011021, val); - } - } - cpu_detect_cache_sizes(c); /* Multi core CPU? */ |