* [Xen-devel] [PATCH] x86: "spec-ctrl=no-xen" should also disable branch hardening
@ 2020-02-19 8:12 Jan Beulich
2020-02-19 16:39 ` Andrew Cooper
0 siblings, 1 reply; 2+ messages in thread
From: Jan Beulich @ 2020-02-19 8:12 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Jin Nan Wang, Wei Liu, Roger Pau Monné
This is controlling Xen behavior alone, after all.
Reported-by: Jin Nan Wang <jnwang@suse.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- 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
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
opt_ibpb = false;
opt_ssbd = false;
opt_l1d_flush = 0;
+ opt_branch_harden = false;
}
else if ( val > 0 )
rc = -EINVAL;
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Xen-devel] [PATCH] x86: "spec-ctrl=no-xen" should also disable branch hardening
2020-02-19 8:12 [Xen-devel] [PATCH] x86: "spec-ctrl=no-xen" should also disable branch hardening Jan Beulich
@ 2020-02-19 16:39 ` Andrew Cooper
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Cooper @ 2020-02-19 16:39 UTC (permalink / raw)
To: Jan Beulich, xen-devel; +Cc: Jin Nan Wang, Wei Liu, Roger Pau Monné
On 19/02/2020 08:12, Jan Beulich wrote:
> This is controlling Xen behavior alone, after all.
>
> Reported-by: Jin Nan Wang <jnwang@suse.com>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
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Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-02-19 8:12 [Xen-devel] [PATCH] x86: "spec-ctrl=no-xen" should also disable branch hardening Jan Beulich
2020-02-19 16:39 ` Andrew Cooper
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