x86: Allow TSC mode (emulate vs native) to be configured per domain.

The default is to emulate. Old saved images will be restored with
legacy behaviour however (native TSC, no emulation).

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index f7b1fc5ec7..3b4cb51796 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -401,7 +401,11 @@ struct xen_domctl_settimeoffset {
 typedef struct xen_domctl_settimeoffset xen_domctl_settimeoffset_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_settimeoffset_t);
 
- 
+#define XEN_DOMCTL_set_tsc_native    57
+typedef struct xen_domctl_set_tsc_native {
+    uint32_t is_native; /* IN: 0: TSC is emulated; 1: TSC is host TSC */
+} xen_domctl_set_tsc_native_t;
+
 #define XEN_DOMCTL_gethvmcontext     33
 #define XEN_DOMCTL_sethvmcontext     34
 typedef struct xen_domctl_hvmcontext {
@@ -672,6 +676,7 @@ struct xen_domctl {
         struct xen_domctl_hypercall_init    hypercall_init;
         struct xen_domctl_arch_setup        arch_setup;
         struct xen_domctl_settimeoffset     settimeoffset;
+        struct xen_domctl_set_tsc_native    set_tsc_native;
         struct xen_domctl_real_mode_area    real_mode_area;
         struct xen_domctl_hvmcontext        hvmcontext;
         struct xen_domctl_hvmcontext_partial hvmcontext_partial;