Commit 3375d828 authored Aug 10, 2015 by Boris Ostrovsky Committed by David Vrabel Aug 20, 2015

xen/x86: Don't try to set PCE bit in CR4



Since VPMU code emulates RDPMC instruction with RDMSR and because hypervisor
does not emulate it there is no reason to try setting CR4's PCE bit (and the
hypervisor will warn on seeing it set).

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

parent bf6dfb15

arch/x86/xen/enlighten.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1011,8 +1011,7 @@ static void xen_write_cr0(unsigned long cr0)

		static void xen_write_cr4(unsigned long cr4)
		{
		cr4 &= ~X86_CR4_PGE;
		cr4 &= ~X86_CR4_PSE;
		cr4 &= ~(X86_CR4_PGE \| X86_CR4_PSE \| X86_CR4_PCE);

		native_write_cr4(cr4);
		}

Admin message