vfio/pci: Clarify the MSI states
The MSI and MSI-X implementations is a bit complex, because it keeps
track of capability and vector states as seen by both the guest and the
host. Add a few comments about those states and rename them to something
more accurate.
What's called phys_state at the moment represents the software state
maintained by VFIO and kvmtool, rather than the physical MSI capability,
so host_state is more correct. To be consistent, rename virt_state to
guest_state as well.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20230628112331.453904-4-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
2 files changed
