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authorAlex Williamson <alex.williamson@redhat.com>2013-04-16 13:49:18 -0600
committerGleb Natapov <gleb@redhat.com>2013-04-28 12:58:56 +0300
commit2a5bab1004729f3302c776e53ee7c895b98bb1ce (patch)
tree281519b89e9f766a3d83c6978850e9eb72b3e0df /arch/ia64
parent064d1afaa5a60fc391d0b4b77599fc8f63f99cd3 (diff)
kvm: Allow build-time configuration of KVM device assignment
We hope to at some point deprecate KVM legacy device assignment in favor of VFIO-based assignment. Towards that end, allow legacy device assignment to be deconfigured. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Alexander Graf <agraf@suse.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/include/uapi/asm/kvm.h1
-rw-r--r--arch/ia64/kvm/Kconfig13
-rw-r--r--arch/ia64/kvm/Makefile6
-rw-r--r--arch/ia64/kvm/kvm-ia64.c2
4 files changed, 14 insertions, 8 deletions
diff --git a/arch/ia64/include/uapi/asm/kvm.h b/arch/ia64/include/uapi/asm/kvm.h
index ec6c6b30123..99503c28440 100644
--- a/arch/ia64/include/uapi/asm/kvm.h
+++ b/arch/ia64/include/uapi/asm/kvm.h
@@ -27,7 +27,6 @@
/* Select x86 specific features in <linux/kvm.h> */
#define __KVM_HAVE_IOAPIC
#define __KVM_HAVE_IRQ_LINE
-#define __KVM_HAVE_DEVICE_ASSIGNMENT
/* Architectural interrupt line count. */
#define KVM_NR_INTERRUPTS 256
diff --git a/arch/ia64/kvm/Kconfig b/arch/ia64/kvm/Kconfig
index 043183a0640..990b86420cc 100644
--- a/arch/ia64/kvm/Kconfig
+++ b/arch/ia64/kvm/Kconfig
@@ -21,8 +21,6 @@ config KVM
tristate "Kernel-based Virtual Machine (KVM) support"
depends on BROKEN
depends on HAVE_KVM && MODULES
- # for device assignment:
- depends on PCI
depends on BROKEN
select PREEMPT_NOTIFIERS
select ANON_INODES
@@ -51,6 +49,17 @@ config KVM_INTEL
Provides support for KVM on Itanium 2 processors equipped with the VT
extensions.
+config KVM_DEVICE_ASSIGNMENT
+ bool "KVM legacy PCI device assignment support"
+ depends on KVM && PCI && IOMMU_API
+ default y
+ ---help---
+ Provide support for legacy PCI device assignment through KVM. The
+ kernel now also supports a full featured userspace device driver
+ framework through VFIO, which supersedes much of this support.
+
+ If unsure, say Y.
+
source drivers/vhost/Kconfig
endif # VIRTUALIZATION
diff --git a/arch/ia64/kvm/Makefile b/arch/ia64/kvm/Makefile
index 511f64a78d5..1a4053789d0 100644
--- a/arch/ia64/kvm/Makefile
+++ b/arch/ia64/kvm/Makefile
@@ -49,10 +49,10 @@ ccflags-y := -Ivirt/kvm -Iarch/ia64/kvm/
asflags-y := -Ivirt/kvm -Iarch/ia64/kvm/
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
- coalesced_mmio.o irq_comm.o assigned-dev.o irqchip.o)
+ coalesced_mmio.o irq_comm.o)
-ifeq ($(CONFIG_IOMMU_API),y)
-common-objs += $(addprefix ../../../virt/kvm/, iommu.o)
+ifeq ($(CONFIG_KVM_DEVICE_ASSIGNMENT),y)
+common-objs += $(addprefix ../../../virt/kvm/, assigned-dev.o iommu.o)
endif
kvm-objs := $(common-objs) kvm-ia64.o kvm_fw.o
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 032c54d63c3..dcc560729c2 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1368,9 +1368,7 @@ void kvm_arch_sync_events(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);
}