[Xen-changelog] [xen staging] x86: "spec-ctrl=no-xen" should also disable branch hardening

[patchbot@xxxxxxx]

commit e6ca7afcf2ddeb72beade853ccd6fa3332210014
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Feb 20 11:37:01 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 20 11:37:01 2020 +0100

    x86: "spec-ctrl=no-xen" should also disable branch hardening
    
    This is controlling Xen behavior alone, after all.
    
    Reported-by: Jin Nan Wang <jnwang@xxxxxxxx>
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/spec_ctrl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/x86/spec_ctrl.c b/xen/arch/x86/spec_ctrl.c
index 20f562902b..aed2c6613a 100644
--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -98,8 +98,6 @@ static int __init parse_spec_ctrl(const char *s)
             if ( opt_pv_l1tf_domu < 0 )
                 opt_pv_l1tf_domu = 0;
 
-            opt_branch_harden = false;
-
             if ( opt_tsx == -1 )
                 opt_tsx = -3;
 
@@ -114,6 +112,7 @@ static int __init parse_spec_ctrl(const char *s)
             opt_ibpb = false;
             opt_ssbd = false;
             opt_l1d_flush = 0;
+            opt_branch_harden = false;
         }
         else if ( val > 0 )
             rc = -EINVAL;
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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