From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
To: Linux-Kernel <linux-kernel@vger.kernel.org>
Cc: Srinivas REDDY Eeda <srinivas.eeda@oracle.com>,
<yamada.masahiro@socionext.com>, Peterz <peterz@infradead.org>
Subject: [PATCH v2 0/2] Enable retpoline only when compiler support
Date: Thu, 1 Nov 2018 02:31:43 -0700 (PDT) [thread overview]
Message-ID: <b570b2f3-28fe-4ab4-b94a-875b5622e882@default> (raw)
According to Peter Zijlstra's suggestion in https://lkml.org/lkml/2018/9/18/1016,
hard bind retpoline with compiler support and remove minimal stuff.
Tested with both CONFIG_RETPOLINE enabled and disabled.
-v2:
Add compiler support check in Kconfig [Masahiro]
Drop 3rd patch as __insn_is_indirect_jump() may be used in some corner case.[PeterZ]
Zhenzhong Duan (2):
retpolines: Only enable retpoline when compiler support it
retpolines: Remove the minimal stuff of retpoline support
arch/x86/Kconfig | 6 ++----
arch/x86/Makefile | 4 +---
arch/x86/include/asm/nospec-branch.h | 12 ++++++------
arch/x86/kernel/cpu/bugs.c | 13 ++-----------
scripts/Makefile.build | 2 --
5 files changed, 11 insertions(+), 26 deletions(-)
--
1.8.3.1
reply other threads:[~2018-11-01 9:41 UTC|newest]
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