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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2015-08-10 16:34:38 -0400
committerDavid Vrabel <david.vrabel@citrix.com>2015-08-20 12:25:26 +0100
commit3375d8284dfb7866f261ec008d15d30999ff273b (patch)
tree4d6eb86609d8fc42a32b4edaf6456b0d0470f3e6
parentbf6dfb154d935725c9a2005033ca33017b9df439 (diff)
downloadop-kernel-dev-3375d8284dfb7866f261ec008d15d30999ff273b.zip
op-kernel-dev-3375d8284dfb7866f261ec008d15d30999ff273b.tar.gz
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.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index fdaba49..25309c1 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);
}
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