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linux/arch/x86
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Dou Liyang 9471eee918 x86/spectre: Check CONFIG_RETPOLINE in command line parser 
The spectre_v2 option 'auto' does not check whether CONFIG_RETPOLINE is
enabled. As a consequence it fails to emit the appropriate warning and sets
feature flags which have no effect at all.

Add the missing IS_ENABLED() check.

Fixes: da285121560e ("x86/spectre: Add boot time option to select Spectre v2 mitigation")
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ak@linux.intel.com
Cc: peterz@infradead.org
Cc: Tomohiro" <misono.tomohiro@jp.fujitsu.com>
Cc: dave.hansen@intel.com
Cc: bp@alien8.de
Cc: arjan@linux.intel.com
Cc: dwmw@amazon.co.uk
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/f5892721-7528-3647-08fb-f8d10e65ad87@cn.fujitsu.com
2018-01-30 15:30:35 +01:00
..
boot
Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-12-31 13:13:56 -08:00
configs
x86/unwind: Rename unwinder config options to 'CONFIG_UNWINDER_*'
2017-10-14 10:12:12 +02:00
crypto
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-14 09:51:25 -08:00
entry
Linux 4.15
2018-01-30 15:08:27 +01:00
events
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-28 12:19:23 -08:00
hyperv
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
ia32
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
include
x86/mm: Fix overlap of i386 CPU_ENTRY_AREA with FIX_BTMAP
2018-01-30 15:30:35 +01:00
kernel
x86/spectre: Check CONFIG_RETPOLINE in command line parser
2018-01-30 15:30:35 +01:00
kvm
Linux 4.15
2018-01-30 15:08:27 +01:00
lib
Linux 4.15
2018-01-30 15:08:27 +01:00
math-emu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mm
x86/mm/64: Tighten up vmalloc_fault() sanity checks on 5-level kernels
2018-01-26 15:56:23 +01:00
net
bpf: fix bpf_tail_call() x64 JIT
2017-10-03 16:04:44 -07:00
oprofile
Modules updates for v4.15
2017-11-15 13:46:33 -08:00
pci
x86/PCI: Enable AMD 64-bit window on resume
2018-01-16 11:45:50 -06:00
platform
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-14 09:51:25 -08:00
power
Merge branch 'WIP.x86-pti.entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-12-18 08:59:15 -08:00
purgatory
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ras
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
realmode
x86/realmode: Don't decrypt trampoline area under SEV
2017-11-07 15:35:55 +01:00
tools
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
um
Merge commit 'upstream-x86-entry' into WIP.x86/mm
2017-12-17 12:58:53 +01:00
video
…
xen
xen: fixes for 4.15-rc8
2018-01-12 10:00:15 -08:00
.gitignore
…
Kbuild
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-07 09:25:15 -07:00
Kconfig
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-14 09:51:25 -08:00
Kconfig.cpu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig.debug
Merge commit 'upstream-x86-entry' into WIP.x86/mm
2017-12-17 12:58:53 +01:00
Makefile
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-14 15:30:02 -08:00
Makefile_32.cpu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Makefile.um
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00