I've been porting the qemu vfio driver to use the common msix
infrastructure and hit a couple issues. The first patch addresses
the problem that a device may already have MSI-X capability setup
and non-adjustable BARs, so msix_init should be able to use the
existing capability instead of adding it's own.
I'm surprised we need the second patch, as I'm not sure how things
work today without it. We allocate msix_irq_entries within a
KVM_CAP_IRQCHIP #ifdef. This should be pulled in from kvm.h, if we
have CONFIG_KVM, but that's pulled in from config-target.h, which
we don't include. We can add config.h to msix.c, but that only
works if the msix object is in Makefile.target instead of
Makefile.objs. Feel free to fix this differently, but I think
something is wrong there. Thanks,
Alex
---
Alex Williamson (2):
msix: Pull in config.h for CONFIG_KVM
msix: Allow msix_init on a device with existing MSI-X capability
Makefile.objs | 2 --
Makefile.target | 1 +
hw/msix.c | 68 ++++++++++++++++++++++++++++++++-----------------------
3 files changed, 40 insertions(+), 31 deletions(-)
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