[Xen-devel] [PATCH 08 of 16] amd iommu: Add a hypercall for hvmloader

[Wei Wang <wei.wang2@xxxxxxx>]

# HG changeset patch
# User Wei Wang <wei.wang2@xxxxxxx>
# Date 1324569395 -3600
# Node ID 2329dad2786f6f20ea69c9609ab60208cad6fca9
# Parent  40d61d0390ec930cf53ce5cbf91faada8c7192bd
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@xxxxxxx>

diff -r 40d61d0390ec -r 2329dad2786f xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c    Thu Dec 22 16:56:32 2011 +0100
+++ b/xen/arch/x86/hvm/hvm.c    Thu Dec 22 16:56:35 2011 +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;
 
@@ -3677,6 +3678,9 @@ 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 40d61d0390ec -r 2329dad2786f xen/include/public/hvm/params.h
--- a/xen/include/public/hvm/params.h   Thu Dec 22 16:56:32 2011 +0100
+++ b/xen/include/public/hvm/params.h   Thu Dec 22 16:56:35 2011 +0100
@@ -142,6 +142,10 @@
 /* Boolean: Enable nestedhvm (hvm only) */
 #define HVM_PARAM_NESTEDHVM    24
 
-#define HVM_NR_PARAMS          27
+#ifndef __ia64__
+#define HVM_PARAM_IOMMU_BASE   27
+#endif
+
+#define HVM_NR_PARAMS          28
 
 #endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */


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