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| author | Alex Williamson <alex.williamson@redhat.com> | 2013-04-16 13:49:18 -0600 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-28 12:58:56 +0300 |
| commit | 2a5bab1004729f3302c776e53ee7c895b98bb1ce (patch) | |
| tree | 281519b89e9f766a3d83c6978850e9eb72b3e0df /arch/x86/kvm | |
| parent | 064d1afaa5a60fc391d0b4b77599fc8f63f99cd3 (diff) | |
| download | lwn-2a5bab1004729f3302c776e53ee7c895b98bb1ce.tar.gz lwn-2a5bab1004729f3302c776e53ee7c895b98bb1ce.zip | |
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/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/Kconfig | 13 | ||||
| -rw-r--r-- | arch/x86/kvm/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
3 files changed, 18 insertions, 6 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 9d50efdb719d..a47a3e54b964 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -21,8 +21,6 @@ config KVM tristate "Kernel-based Virtual Machine (KVM) support" depends on HAVE_KVM depends on HIGH_RES_TIMERS - # for device assignment: - depends on PCI # for TASKSTATS/TASK_DELAY_ACCT: depends on NET select PREEMPT_NOTIFIERS @@ -83,6 +81,17 @@ config KVM_MMU_AUDIT This option adds a R/W kVM module parameter 'mmu_audit', which allows audit KVM MMU at runtime. +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. + # OK, it's a little counter-intuitive to do this, but it puts it neatly under # the virtualization menu. source drivers/vhost/Kconfig diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index a797b8e43ade..d609e1d84048 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -7,8 +7,9 @@ CFLAGS_vmx.o := -I. kvm-y += $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \ coalesced_mmio.o irq_comm.o eventfd.o \ - assigned-dev.o irqchip.o) -kvm-$(CONFIG_IOMMU_API) += $(addprefix ../../../virt/kvm/, iommu.o) + irqchip.o) +kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT) += $(addprefix ../../../virt/kvm/, \ + assigned-dev.o iommu.o) kvm-$(CONFIG_KVM_ASYNC_PF) += $(addprefix ../../../virt/kvm/, async_pf.o) kvm-y += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 145b1c81011b..8747fef7fd59 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2501,7 +2501,6 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_USER_NMI: case KVM_CAP_REINJECT_CONTROL: case KVM_CAP_IRQ_INJECT_STATUS: - case KVM_CAP_ASSIGN_DEV_IRQ: case KVM_CAP_IRQFD: case KVM_CAP_IOEVENTFD: case KVM_CAP_PIT2: @@ -2519,9 +2518,12 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_XSAVE: case KVM_CAP_ASYNC_PF: case KVM_CAP_GET_TSC_KHZ: - case KVM_CAP_PCI_2_3: case KVM_CAP_KVMCLOCK_CTRL: case KVM_CAP_READONLY_MEM: +#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT + case KVM_CAP_ASSIGN_DEV_IRQ: + case KVM_CAP_PCI_2_3: +#endif r = 1; break; case KVM_CAP_COALESCED_MMIO: |