Commit 2956a351 authored May 26, 2008 by Jeremy Fitzhardinge Committed by Thomas Gleixner May 27, 2008

xen: allow some cr4 updates



The guest can legitimately change things like cr4.OSFXSR and
OSXMMEXCPT, so let it.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 349c709f

arch/x86/xen/enlighten.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -648,8 +648,10 @@ static unsigned long xen_read_cr2_direct(void)

		static void xen_write_cr4(unsigned long cr4)
		{
		/* Just ignore cr4 changes; Xen doesn't allow us to do
		anything anyway. */
		cr4 &= ~X86_CR4_PGE;
		cr4 &= ~X86_CR4_PSE;

		native_write_cr4(cr4);
		}

		static unsigned long xen_read_cr3(void)