Commit afca5013 authored Jan 29, 2014 by Mukesh Rathor Committed by Konrad Rzeszutek Wilk Feb 03, 2014

xen/pvh: set CR4 flags for APs



During bootup in the 'probe_page_size_mask' these CR4 flags are
set in there. But for AP processors they are not set as we do not
use 'secondary_startup_64' which the baremetal kernels uses.
Instead do it in this function which we use in Xen PVH during our
startup for AP processors.

As such fix it up to make sure we have that flag set.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

parent e85fc980

arch/x86/xen/enlighten.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -1473,6 +1473,18 @@ static void xen_pvh_set_cr_flags(int cpu)
		* X86_CR0_TS, X86_CR0_PE, X86_CR0_ET are set by Xen for HVM guests
		* (which PVH shared codepaths), while X86_CR0_PG is for PVH. */
		write_cr0(read_cr0() \| X86_CR0_MP \| X86_CR0_NE \| X86_CR0_WP \| X86_CR0_AM);

		if (!cpu)
		return;
		/*
		* For BSP, PSE PGE are set in probe_page_size_mask(), for APs
		* set them here. For all, OSFXSR OSXMMEXCPT are set in fpu_init.
		*/
		if (cpu_has_pse)
		set_in_cr4(X86_CR4_PSE);

		if (cpu_has_pge)
		set_in_cr4(X86_CR4_PGE);
		}

		/*

Admin message