[Xen-devel] [PATCH] x86/Intel: don't probe CPUID faulting on family 0xf CPUs

["Jan Beulich" <JBeulich@xxxxxxxx>]

These are known to not support the feature, so we can save ourselves
from emitting the resulting #GP fault recovery related message (which
might worry people looking at the logs).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/cpu/intel.c
+++ b/xen/arch/x86/cpu/intel.c
@@ -204,7 +204,7 @@ static void __devinit init_intel(struct 
                detect_ht(c);
        }
 
-       if (smp_processor_id() == 0) {
+       if (c == &boot_cpu_data && c->x86 == 6) {
                if (probe_intel_cpuid_faulting())
                        set_bit(X86_FEATURE_CPUID_FAULTING, c->x86_capability);
        } else if (boot_cpu_has(X86_FEATURE_CPUID_FAULTING)) {

Attachment: x86-CPUID-faulting-skip-FamF.patch
Description: Text document

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