On Fri, 13 Aug 2021 04:56:26 +0100, Barry Song <21cnbao@xxxxxxxxx> wrote: > > From: Barry Song <song.bao.hua@xxxxxxxxxxxxx> > > -v3: > added Acked-by of Greg Kroah-Hartman and Bjorn Helgaas, thanks! > refined commit log with respect to Bjorn's comments > > Hi Thomas & Marc, > Would you please handle this series? Thanks! > > -v2: > extract common code for msi_irqs sysfs populate/destory from PCI to MSI core, > platform_device can directly reuse common code; > https://lore.kernel.org/lkml/20210812105341.51657-1-21cnbao@xxxxxxxxx/ > > -v1: > https://lore.kernel.org/lkml/20210811105020.12980-1-song.bao.hua@xxxxxxxxxxxxx/ > > Just like pci devices have msi_irqs which can be used by userspace irq affinity > tools or applications to bind irqs, platform devices also widely support msi > irqs. > For platform devices, for example ARM SMMU, userspaces also care about its msi > irqs as applications can know the mapping between devices and irqs and then > make smarter decision on handling irq affinity. For example, for SVA mode, > it is better to pin io page fault to the numa node applications are running > on. Otherwise, io page fault will get a remote page from the node iopf happens > rather than from the node applications are running on. > > The first patch extracts the sysfs populate/destory code from PCI to > MSI core. The 2nd patch lets platform-msi export msi_irqs entry so that > userspace can know the mapping between devices and irqs for platform > devices. Although I'm not in a position to test it right now, this looks reasonable to me: Acked-by: Marc Zyngier <maz@xxxxxxxxxx> Thomas, do you want to queue this one, given that you already carry a ton of MSI-related patches? Thanks, M. -- Without deviation from the norm, progress is not possible.
