diff options
| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2015-08-10 16:34:38 -0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-20 12:25:26 +0100 |
| commit | 3375d8284dfb7866f261ec008d15d30999ff273b (patch) | |
| tree | 4d6eb86609d8fc42a32b4edaf6456b0d0470f3e6 | |
| parent | bf6dfb154d935725c9a2005033ca33017b9df439 (diff) | |
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>
| -rw-r--r-- | arch/x86/xen/enlighten.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index fdaba49f6759..25309c168311 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -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); } |