On 7/20/17 10:24 PM, Jason Wang wrote:
>
>
> On 2017年07月20日 06:09, Brijesh Singh wrote:
>> I have found that OVMF fails to detect the disk when iommu_platform
>> is set from
>> qemu cli. The failure occurs during the feature bit negotiation.
>>
>> Recently, EDKII introduced IOMMU protocol d1fddc4533bf. SEV patch
>> series introduced
>> a IoMmu protocol driver f9d129e68a45 to set a DMA access attribute
>> and methods to
>> allocate, free, map and unmap the DMA memory for the master bus devices
>>
>> In this patch series, I have tried to enable the IOMMU_PLATFORM
>> feature for
>> VirtioBlkDevice. I am sending this as RFC to seek feedback before I
>> extend the support
>> for other Virtio devices. The patch has been tested in SEV guest -
>> mainly because
>> IoMmuDxe driver installs the IOMMU protocol for SEV guest only. If
>> needed, I can
>> extend the IoMmuDxe driver to install IOMMU protocol for non SEV guests.
>>
>> qemu cli used for testing:
>>
>> # $QEMU \
>> ...
>> -drive file=${HDA_FILE},if=none,id=disk0,format=qcow2 \
>> -device
>> virtio-blk-pci,drive=disk0,disable-legacy=on,iommu_platform=true,disable-modern=off,scsi=off
>> ...
>>
>> Cc: Jordan Justen <jordan.l.jus...@intel.com>
>> Cc: Laszlo Ersek <ler...@redhat.com>
>> Cc: Jason Wang <jasow...@redhat.com>
>> Cc: Michael S. Tsirkin <m...@redhat.com>
>> Contributed-under: TianoCore Contribution Agreement 1.0
>> Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
>>
>> Brijesh Singh (3):
>> OvmfPkg/Include/Virtio10: Define VIRTIO_F_IOMMU_PLATFORM feature bit
>> OvmfPkg/VirtioLib: Add IOMMU_PLATFORM support
>> OvmfPkg/VirtioBlkDxe: Add VIRITO_F_IOMMU_PLATFORM support
>
> Hi, do we need change virtio-scsi driver as well?
>
I see that OVMF has the following virtio drivers, we need to update them
all:
VirtioBlkDxe
VirtioGpuDxe
VirtioNetDxe
VirtioRngDxe
VirtioScsiDxe
I will wait for Laszlo and Jordan's initial feedback before changing
other drivers.
> Thanks
>
>>
>> OvmfPkg/Library/VirtioLib/VirtioLib.inf | 1 +
>> OvmfPkg/VirtioBlkDxe/VirtioBlk.inf | 5 +
>> OvmfPkg/VirtioGpuDxe/VirtioGpu.inf | 1 +
>> OvmfPkg/VirtioNetDxe/VirtioNet.inf | 1 +
>> OvmfPkg/VirtioRngDxe/VirtioRng.inf | 1 +
>> OvmfPkg/VirtioScsiDxe/VirtioScsi.inf | 1 +
>> OvmfPkg/Include/IndustryStandard/Virtio095.h | 1 +
>> OvmfPkg/Include/IndustryStandard/Virtio10.h | 5 +
>> OvmfPkg/Include/Library/VirtioLib.h | 20 ++++
>> OvmfPkg/Library/VirtioLib/VirtioLib.c | 96 ++++++++++++++-
>> OvmfPkg/VirtioBlkDxe/VirtioBlk.c | 125
>> ++++++++++++++++++--
>> 11 files changed, 244 insertions(+), 13 deletions(-)
>>
>
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