[Xen-devel] [PATCH RFC v12 18/21] pvh: Restrict tsc_mode to NEVER_EMULATE for now

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

To be implemented.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
CC: Jan Beulich <jan.beulich@xxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
---
 xen/arch/x86/time.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index f047cb3..4589d43 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1891,6 +1891,14 @@ void tsc_set_info(struct domain *d,
         d->arch.vtsc = 0;
         return;
     }
+    if ( is_pvh_domain(d) && tsc_mode != TSC_MODE_NEVER_EMULATE )
+    {
+        /* PVH fixme: support more tsc modes. */
+        printk(XENLOG_WARNING
+               "PVH currently does not support tsc emulation. Setting 
timer_mode = native\n");
+        d->arch.vtsc = 0;
+        return;
+    }
 
     switch ( d->arch.tsc_mode = tsc_mode )
     {
-- 
1.7.9.5


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