[Xen-devel] [V0 PATCH] pvh: Disable PSE feature for now

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

Until now, xen did not expose PSE to pvh guest, but a patch was submitted
to xen list to enable bunch of features for a pvh guest. PSE has not been
looked into for PVH, so until we can do that and test it to make sure it
works, disable the feature to avoid flood of bugs.

Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
 arch/x86/xen/enlighten.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a4d7b64..4e952046 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1497,6 +1497,11 @@ static void __init xen_pvh_early_guest_init(void)
        xen_have_vector_callback = 1;
        xen_pvh_set_cr_flags(0);
 
+        /* pvh guests are not quite ready for large pages yet */
+        setup_clear_cpu_cap(X86_FEATURE_PSE);
+        setup_clear_cpu_cap(X86_FEATURE_PSE36);
+
+
 #ifdef CONFIG_X86_32
        BUG(); /* PVH: Implement proper support. */
 #endif
-- 
1.7.2.3


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