moonjuice/kernel_arpi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86/retbleed: Add fine grained Kconfig knobs

Browse Source 
commit f43b9876e857c739d407bc56df288b0ebe1a9164 upstream.

Do fine-grained Kconfig for all the various retbleed parts.

NOTE: if your compiler doesn't support return thunks this will
silently 'upgrade' your mitigation to IBPB, you might not like this.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
[cascardo: there is no CONFIG_OBJTOOL]
[cascardo: objtool calling and option parsing has changed]
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Zijlstra
2022-06-27 22:21:17 +00:00
committed by Greg Kroah-Hartman
parent 12a1357005
commit cc3011cdbe
19 changed files with 170 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
scripts/link-vmlinux.sh
View File

@@ -120,7 +120,7 @@ objtool_link()
if [ -n "${CONFIG_VMLINUX_VALIDATION}" ]; then
objtoolopt="${objtoolopt} --noinstr"
if is_enabled CONFIG_RETPOLINE; then
if is_enabled CONFIG_CPU_UNRET_ENTRY; then
objtoolopt="${objtoolopt} --unret"
fi
fi