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| author | Zhou Yanjie <zhouyanjie@zoho.com> | 2019-08-02 16:27:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 18:59:24 +0200 |
| commit | cac61f5b7d9539149105dace7dc52e3ea9dcf6f5 (patch) | |
| tree | 07d16bc52dfdc02dc7ad247d79c1a92c2bdcf70c /arch/mips/lib/memcpy.S | |
| parent | b67fd3bfeec52d0ee5c057b139814ac28a340f76 (diff) | |
| download | linux-stable-cac61f5b7d9539149105dace7dc52e3ea9dcf6f5.tar.gz linux-stable-cac61f5b7d9539149105dace7dc52e3ea9dcf6f5.tar.bz2 linux-stable-cac61f5b7d9539149105dace7dc52e3ea9dcf6f5.zip | |
MIPS: Ingenic: Disable broken BTB lookup optimization.
[ Upstream commit 053951dda71ecb4b554a2cdbe26f5f6f9bee9dd2 ]
In order to further reduce power consumption, the XBurst core
by default attempts to avoid branch target buffer lookups by
detecting & special casing loops. This feature will cause
BogoMIPS and lpj calculate in error. Set cp0 config7 bit 4 to
disable this feature.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: ralf@linux-mips.org
Cc: paul@crapouillou.net
Cc: jhogan@kernel.org
Cc: malat@debian.org
Cc: gregkh@linuxfoundation.org
Cc: tglx@linutronix.de
Cc: allison@lohutok.net
Cc: syq@debian.org
Cc: chenhc@lemote.com
Cc: jiaxun.yang@flygoat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/mips/lib/memcpy.S')
0 files changed, 0 insertions, 0 deletions