KVM: ia64: Add intel iommu support for guests.

With intel iommu hardware, we can assign devices to kvm/ia64 guests.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/arch/ia64/kvm/Makefile b/arch/ia64/kvm/Makefile
index 3b1a1c156ef99693105007c01a1498e081140ab9..cf37f8f490c030a02fb458df21c376af4a051bdb 100644 (file)
--- a/arch/ia64/kvm/Makefile
+++ b/arch/ia64/kvm/Makefile
@@ -46,6 +46,10 @@ EXTRA_AFLAGS += -Ivirt/kvm -Iarch/ia64/kvm/
 common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
                coalesced_mmio.o irq_comm.o)
 
+ifeq ($(CONFIG_DMAR),y)
+common-objs += $(addprefix ../../../virt/kvm/, vtd.o)
+endif
+
 kvm-objs := $(common-objs) kvm-ia64.o kvm_fw.o
 obj-$(CONFIG_KVM) += kvm.o
 

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 3df82f3fe54779a238d1e01c5036e7f5236fc672..c0699f0e35a926936113e42d925b4fd08318c1c3 100644 (file)
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -31,6 +31,7 @@
 #include <linux/bitops.h>
 #include <linux/hrtimer.h>
 #include <linux/uaccess.h>
+#include <linux/intel-iommu.h>
 
 #include <asm/pgtable.h>
 #include <asm/gcc_intrin.h>
@@ -187,6 +188,9 @@ int kvm_dev_ioctl_check_extension(long ext)
        case KVM_CAP_COALESCED_MMIO:
                r = KVM_COALESCED_MMIO_PAGE_OFFSET;
                break;
+       case KVM_CAP_IOMMU:
+               r = intel_iommu_found();
+               break;
        default:
                r = 0;
        }
@@ -773,6 +777,7 @@ static void kvm_init_vm(struct kvm *kvm)
         */
        kvm_build_io_pmt(kvm);
 
+       INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 }
 
 struct  kvm *kvm_arch_create_vm(void)
@@ -1336,6 +1341,10 @@ static void kvm_release_vm_pages(struct kvm *kvm)
 
 void kvm_arch_destroy_vm(struct kvm *kvm)
 {
+       kvm_iommu_unmap_guest(kvm);
+#ifdef  KVM_CAP_DEVICE_ASSIGNMENT
+       kvm_free_all_assigned_devices(kvm);
+#endif
        kfree(kvm->arch.vioapic);
        kvm_release_vm_pages(kvm);
        kvm_free_physmem(kvm);

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 9acf34a6dfbbae350e836a115b014108daa02eb3..797fcd7812420596f10f4a768b6641e6277455dc 100644 (file)
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -383,7 +383,7 @@ struct kvm_trace_rec {
 #define KVM_CAP_MP_STATE 14
 #define KVM_CAP_COALESCED_MMIO 15
 #define KVM_CAP_SYNC_MMU 16  /* Changes to host mmap are reflected in guest */
-#ifdef CONFIG_X86
+#if defined(CONFIG_X86)||defined(CONFIG_IA64)
 #define KVM_CAP_DEVICE_ASSIGNMENT 17
 #endif
 #define KVM_CAP_IOMMU 18