x86/hvm: Tidy up the viridian code a little and flesh out the APIC

assist MSR handling code.

We don't say we that handle that MSR but Windows assumes it. In
Windows 7 it just wrote to the MSR and we used to handle that
ok. Windows 8 also reads from the MSR so we need to keep a record of
the contents.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/xen/include/asm-x86/hvm/viridian.h b/xen/include/asm-x86/hvm/viridian.h
index d8509cb081..496da33ed5 100644
--- a/xen/include/asm-x86/hvm/viridian.h
+++ b/xen/include/asm-x86/hvm/viridian.h
@@ -9,6 +9,21 @@
 #ifndef __ASM_X86_HVM_VIRIDIAN_H__
 #define __ASM_X86_HVM_VIRIDIAN_H__
 
+union viridian_apic_assist
+{   uint64_t raw;
+    struct
+    {
+        uint64_t enabled:1;
+        uint64_t reserved_preserved:11;
+        uint64_t pfn:48;
+    } fields;
+};
+
+struct viridian_vcpu
+{
+    union viridian_apic_assist apic_assist;
+};
+
 union viridian_guest_os_id
 {
     uint64_t raw;