[PATCH 2 of 6 V5] amd iommu: Add a hypercall for hvmloader

[Wei Wang <wei.wang2@amd.com>]

# HG changeset patch
# User Wei Wang <wei.wang2@amd.com>
# Date 1328885355 -3600
# Node ID 3c47f70c84e23b96e766c062a4bbae5bcf4f6dbe
# Parent  9cf24ad61936e5d9a6acac9de1dc1fac6694c31e
amd iommu: Add a hypercall for hvmloader.
IOMMU MMIO base address is dynamically allocated by firmware.
This patch allows hvmloader to notify hypervisor where the
iommu mmio pages are.

Signed-off-by: Wei Wang <wei.wang2@amd.com>

diff -r 9cf24ad61936 -r 3c47f70c84e2 xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c	Fri Feb 10 15:49:09 2012 +0100
+++ b/xen/arch/x86/hvm/hvm.c	Fri Feb 10 15:49:15 2012 +0100
@@ -65,6 +65,7 @@
 #include <public/memory.h>
 #include <asm/mem_event.h>
 #include <public/mem_event.h>
+#include <asm/hvm/svm/amd-iommu-proto.h>
 
 bool_t __read_mostly hvm_enabled;
 
@@ -3775,6 +3776,9 @@ long do_hvm_op(unsigned long op, XEN_GUE
             case HVM_PARAM_BUFIOREQ_EVTCHN:
                 rc = -EINVAL;
                 break;
+            case HVM_PARAM_IOMMU_BASE:
+                rc = guest_iommu_set_base(d, a.value);
+                break;
             }
 
             if ( rc == 0 ) 
diff -r 9cf24ad61936 -r 3c47f70c84e2 xen/include/public/hvm/params.h
--- a/xen/include/public/hvm/params.h	Fri Feb 10 15:49:09 2012 +0100
+++ b/xen/include/public/hvm/params.h	Fri Feb 10 15:49:15 2012 +0100
@@ -141,7 +141,8 @@
 
 /* Boolean: Enable nestedhvm (hvm only) */
 #define HVM_PARAM_NESTEDHVM    24
+#define HVM_PARAM_IOMMU_BASE   27
 
-#define HVM_NR_PARAMS          27
+#define HVM_NR_PARAMS          28
 
 #endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */