On Fri, Nov 11, 2022 at 02:58:46PM +0100, Thomas Gleixner wrote: > Provide a new MSI feature flag in preparation for dynamic MSIX allocation > after the initial MSI-X enable has been done. > > This needs to be an explicit MSI interrupt domain feature because quite > some implementations (both interrupt domains and legacy allocation mode) > have clear expectations that the allocation code is only invoked when MSI-X > is about to be enabled. They either talk to hypervisors or do some other > work and are not prepared to be invoked on an already MSI-X enabled device. > > This is also explicit MSI-X only because rewriting the size of the MSI > entries is only possible when disabling MSI which in turn might cause lost > interrupts on the device. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > --- > include/linux/msi.h | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
