[PATCH 0/13][jammy/linux] Backport vmci patches to Jammy kernel

Stefan Bader stefan.bader at canonical.com
Wed Jun 15 07:21:44 UTC 2022

On 14.06.22 21:06, Tim Gardner wrote:
> BugLink: https://bugs.launchpad.net/bugs/1978145
> SRU Justification
> [Impact]
> The request is to bring vmci to TOT and back port the following patches into
> Ubuntu kernels.

This sounds like adding a cloud/customer feature into a distro kernel, worse 
into a LTS one. IMO there should be more explanation why WE want to do that 
(benefit for distro users) and not just one sentence of which the first part 
sounds like gibberish to me.


> 1. fac608138c6136126faadafa5554cc0bbabf3c44 ("VMCI: dma dg: whitespace formatting change for vmci register defines")
> 2. e283a0e8b7ea83915e988ed059384af166b444c0 ("VMCI: dma dg: add MMIO access to registers")
> 3. eed2298d936087a1c85e0fa6f7170028e4f4fded ("VMCI: dma dg: detect DMA datagram capability")
> 4. 8cb520bea1470ca205980fbf030ed1f472f4af2f ("VMCI: dma dg: set OS page size")
> 5. cc68f2177fcbfe2dbe5e9514789b96ba5995ec1e ("VMCI: dma dg: register dummy IRQ handlers for DMA datagrams")
> 6. 5ee109828e73bbe4213c373988608d8f33e03d78 ("VMCI: dma dg: allocate send and receive buffers for DMA datagrams")
> 7. 22aa5c7f323022477b70e044eb00e6bfea9498e8 ("VMCI: dma dg: add support for DMA datagrams sends")
> 8. 463713eb6164b6577f8e91447c7745628215531b ("VMCI: dma dg: add support for DMA datagrams receive")
> 9. 77e861619baea5a7c934e47fda74b03c0b072aec ("VMCI: Fix some error handling paths in vmci_guest_probe_device()")
> 10. c8e9b30ccae605bf1dbeaf03971f9b83f70b928d ("VMCI: Release notification_bitmap in error path")
> 11. 5df0e734b8c39598effe0f17e5bd8ff7748a0693 ("VMCI: Check exclusive_vectors when freeing interrupt 1")
> 12. 1f7142915d304804a9bd952245fce92786b1b62f ("VMCI: Add support for ARM64")
> 13. ba03a9bbd17b149c373c0ea44017f35fc2cd0f28 ("VMCI: Release resource if the work is already queued")
> [Test Plan]
> User tested
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1978145/comments/4
> [Where things could go wrong]
> The VMWARE VMCI driver could fail in new and interesting ways.

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