mirror of https://github.com/acidanthera/audk.git
53a4c6047f
For the case when an IOMMU is used for translating system physical addresses to DMA bus master addresses, the transport-independent virtio device drivers will be required to map their VRING areas to bus addresses with VIRTIO_DEVICE_PROTOCOL.MapSharedBuffer() calls. - MMIO and legacy virtio transport do not support IOMMU to translate the addresses hence RingBaseShift will always be set to zero. - modern virtio transport supports IOMMU to translate the address, in next patch we will update the Virtio10Dxe to use RingBaseShift offset. Suggested-by: Laszlo Ersek <lersek@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> [lersek@redhat.com: remove commit msg paragraph with VirtioLib reference] [lersek@redhat.com: fix typo in VIRTIO_SET_QUEUE_ADDRESS comment block] Reviewed-by: Laszlo Ersek <lersek@redhat.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com> |
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| .. | ||
| VirtioPciDevice.c | ||
| VirtioPciDevice.h | ||
| VirtioPciDeviceDxe.inf | ||
| VirtioPciFunctions.c | ||