Zhenzhong Duan 8c4ad5d391 x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support ... commit 4cd24de3a0980bf3100c9dcb08ef65ca7c31af48 upstream Since retpoline capable compilers are widely available, make CONFIG_RETPOLINE hard depend on the compiler capability. Break the build when CONFIG_RETPOLINE is enabled and the compiler does not support it. Emit an error message in that case: "arch/x86/Makefile:226: *** You are building kernel with non-retpoline compiler, please update your compiler.. Stop." [dwmw: Fail the build with non-retpoline compiler] Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Borislav Petkov <bp@suse.de> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: <srinivas.eeda@oracle.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/cca0cb20-f9e2-4094-840b-fb0f8810cd34@default Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-12-05 19:32:01 +01:00
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basic	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
coccinelle	Coccinelle: remove pci_alloc_consistent semantic to detect in zalloc-simple.cocci	2018-08-22 23:21:43 +09:00
dtc	scripts/dtc: consolidate include path options in Makefile	2018-08-22 23:21:36 +09:00
gcc-plugins	gcc plugin fix:	2018-08-26 11:41:08 -07:00
gdb
genksyms
kconfig	kconfig: do not require pkg-config on make {menu,n}config	2018-09-03 02:13:48 +09:00
ksymoops
mod	scripts: modpost: check memory allocation results	2018-08-22 23:21:40 +09:00
package	kbuild: deb-pkg: fix too low build version number	2018-11-27 16:13:07 +01:00
selinux	staging: lustre: delete the filesystem from the tree.	2018-06-05 19:22:35 +02:00
tracing	scripts: Add Python 3 support to tracing/draw_functrace.py	2018-07-29 11:08:38 +09:00
.gitignore	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
adjust_autoksyms.sh
asn1_compiler.c
bin2c.c	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
bloat-o-meter
bootgraph.pl
bpf_helpers_doc.py
cc-can-link.sh	bpfilter: check compiler capability in Kconfig	2018-06-28 13:36:39 +09:00
check_00index.sh
check_extable.sh
checkincludes.pl
checkkconfigsymbols.py
checkpatch.pl	checkpatch: add __ro_after_init to known $Attribute	2018-09-04 16:45:02 -07:00
checkstack.pl	scripts: Add ppc64le support for checkstack.pl	2018-07-02 23:54:28 +10:00
checksyscalls.sh
checkversion.pl
clang-version.sh	kbuild: Add a space after ! to prevent parsing as file pattern	2018-08-22 23:21:40 +09:00
cleanfile
cleanpatch
coccicheck	coccicheck: return proper error code on fail	2018-08-14 08:58:56 +09:00
config
conmakehash.c
const_structs.checkpatch
decode_stacktrace.sh
decodecode
depmod.sh	kbuild: modules_install: warn when missing System.map file	2018-09-09 09:14:07 +09:00
diffconfig
documentation-file-ref-check	scripts/documentation-file-ref-check: ignore sched-pelt false positive	2018-07-02 11:25:00 -06:00
export_report.pl
extract_xc3028.pl
extract-cert.c
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux	scripts: teach extract-vmlinux about LZ4 and ZSTD	2018-07-08 09:32:32 +09:00
faddr2line	scripts/faddr2line: make the new code listing format optional	2018-06-05 09:04:37 -07:00
file-size.sh
find-unused-docs.sh
gcc-goto.sh
gcc-ld
gcc-plugin.sh
gcc-version.sh
gcc-x86_32-has-stack-protector.sh	stack-protector: test compiler capability in Kconfig and drop AUTO mode	2018-06-08 18:56:00 +09:00
gcc-x86_64-has-stack-protector.sh	stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y	2018-06-25 23:21:13 +09:00
get_dvb_firmware
get_maintainer.pl	get_maintainer: allow option --mpath <directory> to read all files in <directory>	2018-08-22 10:52:48 -07:00
gfp-translate
headerdep.pl
headers_check.pl
headers_install.sh
headers.sh
insert-sys-cert.c
kallsyms.c	scripts: Fixed printf format mismatch	2018-05-29 22:04:12 +09:00
Kbuild.include	x86/build: Remove jump label quirk for GCC older than 4.5.2	2018-08-30 11:37:08 +02:00
Kconfig.include	gcc-plugins: test plugin support in Kconfig and clean up Makefile	2018-06-11 09:16:22 +09:00
kernel-doc	scripts/kernel-doc: Escape all literal braces in regexes	2018-08-06 13:36:20 -06:00
ld-version.sh
leaking_addresses.pl
Lindent
link-vmlinux.sh	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile	kbuild: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBS	2018-07-18 01:18:05 +09:00
Makefile.asm-generic
Makefile.build	x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support	2018-12-05 19:32:01 +01:00
Makefile.clean	kbuild: remove deprecated host-progs variable	2018-08-09 21:51:17 +09:00
Makefile.dtbinst
Makefile.extrawarn
Makefile.gcc-plugins	gcc-plugins: Regularize Makefile.gcc-plugins	2018-07-24 16:11:07 -07:00
Makefile.headersinst
Makefile.host	kbuild: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBS	2018-07-18 01:18:05 +09:00
Makefile.kasan
Makefile.kcov	kcov: test compiler capability in Kconfig and correct dependency	2018-06-11 09:14:08 +09:00
Makefile.lib	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile.modbuiltin	Kbuild: Makefile.modbuiltin: include auto.conf and tristate.conf mandatory	2018-08-03 00:47:00 +09:00
Makefile.modinst	kbuild: remove duplicated comments about PHONY	2018-07-06 22:04:03 +09:00
Makefile.modpost	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile.modsign	kbuild: remove duplicated comments about PHONY	2018-07-06 22:04:03 +09:00
Makefile.ubsan	lib/ubsan: remove null-pointer checks	2018-08-10 20:19:58 -07:00
makelst
markup_oops.pl
mkcompile_h
mkmakefile
mksysmap
mkuboot.sh
module-common.lds
namespace.pl
objdiff
parse-maintainers.pl
patch-kernel
pnmtologo.c
profile2linkerlist.pl
prune-kernel
recordmcount.c	scripts: Fixed printf format mismatch	2018-05-29 22:04:12 +09:00
recordmcount.h	scripts: Fixed printf format mismatch	2018-05-29 22:04:12 +09:00
recordmcount.pl	nds32/ftrace: Add RECORD_MCOUNT support	2018-09-04 14:45:18 +08:00
setlocalversion	Revert "scripts/setlocalversion: git: Make -dirty check more robust"	2018-11-27 16:13:08 +01:00
show_delta
sign-file.c
sortextable.c
sortextable.h
spdxcheck.py	scripts/spdxcheck.py: make python3 compliant	2018-11-21 09:19:25 +01:00
spelling.txt	treewide: correct "differenciate" and "instanciate" typos	2018-08-23 18:48:43 -07:00
sphinx-pre-install
split-man.pl
stackdelta
stackusage
subarch.include	selftests: add headers_install to lib.mk	2018-09-05 08:12:09 -06:00
tags.sh	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-07-18 19:32:54 -07:00
unifdef.c
ver_linux	ver_linux: Do not check for ver_linux pattern in version function	2018-07-07 17:44:52 +02:00
xen-hypercalls.sh
xz_wrap.sh