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authorPawel Moll <pawel.moll@arm.com>2015-01-23 07:15:55 +0300
committerRusty Russell <rusty@rustcorp.com.au>2015-01-23 07:27:10 +0300
commit1862ee22ce2e28087299aebb6556a5cdc122d0ef (patch)
treef28c2d0aae6d7e9bde82b269d09da72d727f8522 /security
parent76545f066d2a85464a9f81de2e159b199cc2942b (diff)
downloadlinux-1862ee22ce2e28087299aebb6556a5cdc122d0ef.tar.xz
virtio-mmio: Update the device to OASIS spec version
This patch add a support for second version of the virtio-mmio device, which follows OASIS "Virtual I/O Device (VIRTIO) Version 1.0" specification. Main changes: 1. The control register symbolic names use the new device/driver nomenclature rather than the old guest/host one. 2. The driver detect the device version (version 1 is the pre-OASIS spec, version 2 is compatible with fist revision of the OASIS spec) and drives the device accordingly. 3. New version uses direct addressing (64 bit address split into two low/high register) instead of the guest page size based one, and addresses each part of the queue (descriptors, available, used) separately. 4. The device activity is now explicitly triggered by writing to the "queue ready" register. 5. Whole 64 bit features are properly handled now (both ways). Signed-off-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions