xen: no need for domU to worry about MCE/MCA
Mask MCE/MCA out of cpu caps. Its harmless to leave them there, but it does prevent the kernel from starting an unnecessary thread. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -155,6 +155,8 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
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if (*ax == 1)
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maskedx = ~((1 << X86_FEATURE_APIC) | /* disable APIC */
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(1 << X86_FEATURE_ACPI) | /* disable ACPI */
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(1 << X86_FEATURE_MCE) | /* disable MCE */
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(1 << X86_FEATURE_MCA) | /* disable MCA */
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(1 << X86_FEATURE_ACC)); /* thermal monitoring */
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asm(XEN_EMULATE_PREFIX "cpuid"
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