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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>
This commit is contained in:
Boris Ostrovsky 2015-08-10 16:34:38 -04:00 committed by David Vrabel
parent bf6dfb154d
commit 3375d8284d
1 changed files with 1 additions and 2 deletions
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3
arch/x86/xen/enlighten.c
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@ -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);
}