From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 16 Feb 2022 20:57:02 +0100
Subject: Documentation/hw-vuln: Update spectre doc
Git-commit: 5ad3eb1132453b9795ce5fd4572b1c18b292cca9
Patch-mainline: v5.17-rc8
References: bsc#1191580 CVE-2022-0001 CVE-2022-0002
Update the doc with the new fun.
[ bp: Massage commit message. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---
Documentation/admin-guide/kernel-parameters.txt | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4180,8 +4180,12 @@
Specific mitigations can also be selected manually:
retpoline - replace indirect branches
- retpoline,generic - google's original retpoline
- retpoline,amd - AMD-specific minimal thunk
+ retpoline,generic - Retpolines
+ retpoline,lfence - LFENCE; indirect branch
+ retpoline,amd - alias for retpoline,lfence
+ eibrs - enhanced IBRS
+ eibrs,retpoline - enhanced IBRS + Retpolines
+ eibrs,lfence - enhanced IBRS + LFENCE
Not specifying this option is equivalent to
spectre_v2=auto.