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/1280152273
(the build failures are due to issues with fetching or building newer QEMU
discussed on Matrix)
v7:
- "x86/msi: passthrough all MSI-X vector ctrl writes to device model" is already applied
Marek Marczykowski-Górecki (6):
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 | 205 ++++++++++++-
xen/arch/x86/include/asm/msi.h | 22 +-
xen/arch/x86/msi.c | 47 ++-
9 files changed, 285 insertions(+), 19 deletions(-)
base-commit: ebab808eb1bb8f24c7d0dd41b956e48cb1824b81
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git-series 0.9.1