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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-04 09:51:50 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-04 09:51:50 +0200 |
| commit | e194bbdf362ba7d53cfd23ba24f1a7c90ef69a74 (patch) | |
| tree | c1c78cc0e09ce8f3b7a38d3f022a70792195df49 /arch/x86/kvm/Kconfig | |
| parent | f71f81d70a264ac9924deb9a95a7e0a4578e7648 (diff) | |
| download | lwn-e194bbdf362ba7d53cfd23ba24f1a7c90ef69a74.tar.gz lwn-e194bbdf362ba7d53cfd23ba24f1a7c90ef69a74.zip | |
kvm: x86: default legacy PCI device assignment support to "n"
VFIO has proved itself a much better option than KVM's built-in
device assignment. It is mature, provides better isolation because
it enforces ACS, and even the userspace code is being tested on
a wider variety of hardware these days than the legacy support.
Disable legacy device assignment by default.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/Kconfig')
| -rw-r--r-- | arch/x86/kvm/Kconfig | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 413a7bf9efbb..a0f06a5947c5 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -88,13 +88,14 @@ config KVM_MMU_AUDIT config KVM_DEVICE_ASSIGNMENT bool "KVM legacy PCI device assignment support" depends on KVM && PCI && IOMMU_API - default y + default n ---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. + framework through VFIO, which supersedes this support and provides + better security. - If unsure, say Y. + If unsure, say N. # OK, it's a little counter-intuitive to do this, but it puts it neatly under # the virtualization menu. |