On Sun, Mar 31, 2019 at 11:15:00AM +0000, Elijah Shakkour wrote: [...]
> I didn't have DMA nor MMIO read/write working with my old command line. > But, when I removed all CPU flags and only provided "-cpu host", I see that > MMIO works. > Still, DMA read/write from emulated device doesn't work for VF. For example: > Driver provides me a buffer pointer through MMIO write, this address > (pointer) is GPA of L2, and when I try to call pci_dma_read() with this > address I get: > " > Unassigned mem read 0000000000000000 > " I don't know where this error log was dumped but if it's during DMA then I agree it can probably be related to vIOMMU. > As I said, my problem now is in translation of L2 GPA provided by driver, > when I call DMA read/write for this address from VF. > Any insights? I just noticed that you were using QEMU 2.12 [1]. If that's the case, please rebase to the latest QEMU, at least >=3.0 because there's major refactor of the shadow logic during 3.0 devel cycle AFAICT. > > > > > > > I'm using Knut Omang SRIOV patches rebased to QEMU v2.12. [1] Regards, -- Peter Xu
