virtio-pci: use 2 32-bit writes for 64-bit fields #306
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As per virtio spec 4.1.3.1 [1]: > For device configuration access, the driver MUST use 8-bit wide > accesses for 8-bit wide fields, 16-bit wide and aligned accesses for > 16-bit wide fields and 32-bit wide and aligned accesses for 32-bit > and 64-bit wide fields. This patch makes the virtio-pci driver sets 64-bit addresses with 2 32-bit writes to align with the spec. [1] https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-1220001 Signed-off-by: Changyuan Lyu <changyuanl@google.com>
retrage
approved these changes
Dec 27, 2023
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As per virtio spec 4.1.3.1 [1]:
This patch makes the virtio-pci driver sets 64-bit addresses with 2 32-bit writes to align with the spec.
[1] https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-1220001