On Mon, May 06, 2024 at 02:33:19AM +0200, Marek Marczykowski-Górecki wrote: > This series fixes handling MSI-X when device model is running in a stubdomain. > The main part is to avoid accessing /dev/mem, which also fixes running dom0 > with lockdown enabled. > > It depends on a behavior change of Xen that was just comitted, and signaled > with a feature flag. If Xen is too old (and XENFEAT_dm_msix_all_writes flag is > not set), fallback to the old behavior. > > The other part is a fix to enforce read-only registers in the config space. > This fixes MSI-X setup for iwlwifi Linux driver, as it happen to write to > MSI-X > capability id reg (as a workaround for some older device which has another > register there). It should be no-op, but due to a bug in xen_pt code, > it broke MSI-X detection. > > All those patches have been shipped in Qubes OS 4.2 already, and prove to fix > the issue. > > See individual commit messages for details.
Initially I sent the series with the old Anthony's address, but just in case I forwarded it to his new address too. > Marek Marczykowski-Górecki (3): > hw/xen/xen_pt: Save back data only for declared registers > Update Xen's features.h header > Do not access /dev/mem in MSI-X PCI passthrough on Xen > > hw/xen/xen_pt.c | 7 +- > hw/xen/xen_pt_msi.c | 94 ++++++++++++++++++------------ > include/hw/xen/interface/features.h | 17 +++++- > 3 files changed, 82 insertions(+), 36 deletions(-) > > base-commit: 2358f1b60f73287fe606c7ff48043b4f9e1c2d0f > -- > git-series 0.9.1 -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab
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