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| author | Alex Williamson <alex.williamson@redhat.com> | 2013-10-30 11:02:30 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-10-30 19:02:23 +0100 |
| commit | e0f0bbc527f6e9c0261f1d16b2a0b47612b7f235 (patch) | |
| tree | 623b954e7571767c4d5f0581ad8ba6eacd48785d /arch/x86/include/asm/kvm_host.h | |
| parent | d96eb2c6f480769bff32054e78b964860dae4d56 (diff) | |
| download | blackbird-obmc-linux-e0f0bbc527f6e9c0261f1d16b2a0b47612b7f235.tar.gz blackbird-obmc-linux-e0f0bbc527f6e9c0261f1d16b2a0b47612b7f235.zip | |
kvm: Create non-coherent DMA registeration
We currently use some ad-hoc arch variables tied to legacy KVM device
assignment to manage emulation of instructions that depend on whether
non-coherent DMA is present. Create an interface for this, adapting
legacy KVM device assignment and adding VFIO via the KVM-VFIO device.
For now we assume that non-coherent DMA is possible any time we have a
VFIO group. Eventually an interface can be developed as part of the
VFIO external user interface to query the coherency of a group.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 91b35e4005d3..de388c55e7ec 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -565,6 +565,8 @@ struct kvm_arch { struct list_head assigned_dev_head; struct iommu_domain *iommu_domain; bool iommu_noncoherent; +#define __KVM_HAVE_ARCH_NONCOHERENT_DMA + atomic_t noncoherent_dma_count; struct kvm_pic *vpic; struct kvm_ioapic *vioapic; struct kvm_pit *vpit; |
