[Xen-devel] [PATCH v2] x86/spec-ctrl: command line handling adjustments

["Jan Beulich" <JBeulich@xxxxxxxx>]

For one, "no-xen" should not imply "no-eager-fpu", as "eager FPU" mode
is to guard guests, not Xen itself, which is also expressed so by
print_details().

And then opt_ssbd, despite being off by default, should also be cleared
by the "no" and "no-xen" sub-options.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
v2: Also clear opt_ssbd on the "disable_common" path.

--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -124,6 +124,8 @@ static int __init parse_spec_ctrl(const
             opt_msr_sc_pv = false;
             opt_msr_sc_hvm = false;
 
+            opt_eager_fpu = 0;
+
         disable_common:
             opt_rsb_pv = false;
             opt_rsb_hvm = false;
@@ -131,7 +133,7 @@ static int __init parse_spec_ctrl(const
             opt_thunk = THUNK_JMP;
             opt_ibrs = 0;
             opt_ibpb = false;
-            opt_eager_fpu = 0;
+            opt_ssbd = false;
         }
         else if ( val > 0 )
             rc = -EINVAL;





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