File 5d419d49-x86-spec-ctrl-report-proper-status.patch of Package xen

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File 5d419d49-x86-spec-ctrl-report-proper-status.patch of Package xen (Revision a90efdcc88577026ef2a13678bb8ab98)

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# Commit 2adc580bd59f5c3034fd6ecacd5748678373f17a
# Date 2019-07-31 14:53:13 +0100
# Author Jin Nan Wang <jnwang@suse.com>
# Committer Andrew Cooper <andrew.cooper3@citrix.com>
xen/spec-ctrl: Speculative mitigation facilities report wrong status

Booting with spec-ctrl=0 results in Xen printing "None MD_CLEAR".

(XEN)   Support for HVM VMs: None MD_CLEAR
  (XEN)   Support for PV VMs: None MD_CLEAR

Add a check about X86_FEATURE_MD_CLEAR to avoid to print "None".

Signed-off-by: James Wang <jnwang@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -360,6 +360,7 @@ static void __init print_details(enum in
     printk("  Support for HVM VMs:%s%s%s%s%s\n",
            (boot_cpu_has(X86_FEATURE_SC_MSR_HVM) ||
             boot_cpu_has(X86_FEATURE_SC_RSB_HVM) ||
+            boot_cpu_has(X86_FEATURE_MD_CLEAR)   ||
             opt_eager_fpu)                           ? ""               : " None",
            boot_cpu_has(X86_FEATURE_SC_MSR_HVM)      ? " MSR_SPEC_CTRL" : "",
            boot_cpu_has(X86_FEATURE_SC_RSB_HVM)      ? " RSB"           : "",
@@ -371,6 +372,7 @@ static void __init print_details(enum in
     printk("  Support for PV VMs:%s%s%s%s%s\n",
            (boot_cpu_has(X86_FEATURE_SC_MSR_PV) ||
             boot_cpu_has(X86_FEATURE_SC_RSB_PV) ||
+            boot_cpu_has(X86_FEATURE_MD_CLEAR)  ||
             opt_eager_fpu)                           ? ""               : " None",
            boot_cpu_has(X86_FEATURE_SC_MSR_PV)       ? " MSR_SPEC_CTRL" : "",
            boot_cpu_has(X86_FEATURE_SC_RSB_PV)       ? " RSB"           : "",

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File 5d419d49-x86-spec-ctrl-report-proper-status.patch of Package xen (Revision a90efdcc88577026ef2a13678bb8ab98)

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