Commit ff12849a authored Sep 28, 2010 by Stefano Stabellini

xen: mask the MTRR feature from the cpuid



We don't want Linux to think that the cpu supports MTRRs when running
under Xen because MTRR operations could only be performed through
hypercalls.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

parent 4fe7d5a7

arch/x86/xen/enlighten.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -243,6 +243,7 @@ static __init void xen_init_cpuid_mask(void)
		cpuid_leaf1_edx_mask =
		~((1 << X86_FEATURE_MCE) \| /* disable MCE */
		(1 << X86_FEATURE_MCA) \| /* disable MCA */
		(1 << X86_FEATURE_MTRR) \| /* disable MTRR */
		(1 << X86_FEATURE_ACC)); /* thermal monitoring */

		if (!xen_initial_domain())