| commit | f1df323924e2fde14cbcd51209a8cbfc33e0c232 | |
| author | Wu Zhangjin <wuzhangjin@gmail.com> | |
| Sat, 13 Mar 2010 04:34:15 +0000 (13 12:34 +0800) | ||
| committer | Ralf Baechle <ralf@linux-mips.org> | |
| Mon, 12 Apr 2010 16:26:15 +0000 (12 17:26 +0100) | ||
| tree | a0f5a3c09e4a9e8ec3eb11bcc4e9d729b0af9dce | treesnapshot (tar.gz zip) |
| parent | d814c28ceca8f659c0012eaec8e21eee43710716 | commitdiff |
MIPS: Loongson-2F: Flush the branch target history in BTB and RAS
As per chapter 15 "Errata: Issue of Out-of-order in loongson"[1] to work
around the Loongson 2F erratum we need to do:
"When switching from user mode to kernel mode, you should flush the
branch target history such as BTB and RAS."
[1] Chinese version: http://www.loongson.cn/uploadfile/file/200808211
[2] English version of chapter 15:
http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Patchwork: http://patchwork.linux-mips.org/patch/1066/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
As per chapter 15 "Errata: Issue of Out-of-order in loongson"[1] to work
around the Loongson 2F erratum we need to do:
"When switching from user mode to kernel mode, you should flush the
branch target history such as BTB and RAS."
[1] Chinese version: http://www.loongson.cn/uploadfile/file/200808211
[2] English version of chapter 15:
http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Patchwork: http://patchwork.linux-mips.org/patch/1066/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| arch/mips/include/asm/stackframe.h | diffblobblamehistory |