[Xen-devel] [PATCH v14 14/17] 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>
---
v13:
 - Only print a warning if tsc_mode != TSC_MODE_DEFAULT

CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
---
 xen/arch/x86/time.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index c1bbd50..087b301 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1827,6 +1827,22 @@ void tsc_set_info(struct domain *d,
         d->arch.vtsc = 0;
         return;
     }
+    if ( is_pvh_domain(d) )
+    {
+        /* PVH fixme: support more tsc modes. */
+        switch ( tsc_mode )
+        {
+        case TSC_MODE_NEVER_EMULATE:
+            break;
+        default:
+            printk(XENLOG_WARNING
+                   "PVH currently does not support tsc emulation. Setting 
timer_mode = never_emulate\n");
+            /* FALLTHRU */
+        case TSC_MODE_DEFAULT:
+            tsc_mode = TSC_MODE_NEVER_EMULATE;
+            break;
+        }
+    }
 
     switch ( d->arch.tsc_mode = tsc_mode )
     {
-- 
1.7.9.5


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