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[v6,0/7] MSI-X support with qemu in stubdomain, and other related changes

Message ID cover.3491f479d5b6238106af8ddc56ec6834090b330f.1714154036.git-series.marmarek@invisiblethingslab.com (mailing list archive)
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Series MSI-X support with qemu in stubdomain, and other related changes | expand

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Marek Marczykowski-Górecki April 26, 2024, 5:53 p.m. UTC 
This series includes changes to make MSI-X working with Linux stubdomain and
especially Intel Wifi 6 AX210 card. This takes care of remaining reasons for
QEMU to access /dev/mem, but also the Intel Wifi card violating spec by putting
some registers on the same page as the MSI-X table.
Besides the stubdomain case (of which I care more), this is also necessary for
PCI-passthrough to work with lockdown enabled in dom0 (when QEMU runs in dom0).

See individual patches for details.

This series include also tests for MSI-X using new approach (by preventing QEMU
access to /dev/mem). But for it to work, it needs QEMU change that
makes use of the changes introduced here. It can be seen at
https://github.com/marmarek/qemu/commits/msix

Here is the pipeline that used the QEMU fork above:
https://gitlab.com/xen-project/people/marmarek/xen/-/pipelines/1269664578

Marek Marczykowski-Górecki (7):
  x86/msi: passthrough all MSI-X vector ctrl writes to device model
  x86/msi: Extend per-domain/device warning mechanism
  x86/hvm: Allow access to registers on the same page as MSI-X table
  automation: prevent QEMU access to /dev/mem in PCI passthrough tests
  automation: switch to a wifi card on ADL system
  [DO NOT APPLY] switch to qemu fork
  [DO NOT APPLY] switch to alternative artifact repo

 Config.mk                                           |   4 +-
 automation/gitlab-ci/build.yaml                     |   4 +-
 automation/gitlab-ci/test.yaml                      |   4 +-
 automation/scripts/qubes-x86-64.sh                  |   9 +-
 automation/tests-artifacts/alpine/3.18.dockerfile   |   7 +-
 automation/tests-artifacts/kernel/6.1.19.dockerfile |   2 +-
 xen/arch/x86/hvm/vmsi.c                             | 215 ++++++++++++-
 xen/arch/x86/include/asm/msi.h                      |  22 +-
 xen/arch/x86/msi.c                                  |  46 ++-
 xen/common/kernel.c                                 |   1 +-
 xen/include/public/features.h                       |   8 +-
 11 files changed, 300 insertions(+), 22 deletions(-)

base-commit: 7846f7699fea25502061a05ea847e942ea624f12