Currently multiple MSI mode is limited to a single vector per device (at least on x86 and PPC). This series breathes life into pci_enable_msi_block() and makes it possible to set interrupt affinity for multiple IRQs, similarly to MSI-X. Yet, only for x86 and only when IOMMUs are present.
Although IRQ and PCI subsystems are modified, the current behaviour left intact. The drivers could just start using multiple MSIs just by following the existing documentation. The patches are adapted to Ingo's -tip repository, x86/apic branch. Alexander Gordeev (3): x86, MSI: Support multiple MSIs in presense of IRQ remapping x86, MSI: Allocate as many multiple IRQs as requested x86, MSI: Minor readability fixes arch/x86/kernel/apic/io_apic.c | 170 +++++++++++++++++++++++++++++++++++++--- drivers/pci/msi.c | 10 ++- include/linux/irq.h | 6 ++ include/linux/msi.h | 1 + kernel/irq/chip.c | 30 +++++-- kernel/irq/irqdesc.c | 31 +++++++ 6 files changed, 226 insertions(+), 22 deletions(-) -- 1.7.7.6 -- Regards, Alexander Gordeev agord...@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
