linux_dsm_epyc7002/arch/s390/pci
Sebastian Ott e979ce7bce s390/pci: provide support for CPU directed interrupts
Up until now all interrupts on s390 have been floating. For MSI interrupts
we've used a global summary bit vector (with a bit for each function) and
a per-function interrupt bit vector (with a bit per MSI).

This patch introduces a new IRQ delivery mode: CPU directed interrupts.
In this new mode a per-CPU interrupt bit vector is used (with a bit per
MSI per function). Further it is now possible to direct an IRQ to a
specific CPU so we can finally support IRQ affinity.

If an interrupt can't be delivered because the appointed CPU is occupied
by a hypervisor the interrupt is delivered floating. For this a global
summary bit vector is used (with a bit per CPU).

Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-04-29 10:47:01 +02:00
..
Makefile s390/pci: move everything irq related to pci_irq.c 2019-04-29 10:47:01 +02:00
pci_clp.c s390/pci: fix sleeping in atomic during hotplug 2018-12-13 10:42:26 +01:00
pci_debug.c s390: pci: no need to check return value of debugfs_create functions 2019-01-28 15:58:54 +01:00
pci_dma.c dma-mapping: zero memory returned from dma_alloc_* 2018-12-20 08:13:52 +01:00
pci_event.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci_insn.c s390/pci: provide support for CPU directed interrupts 2019-04-29 10:47:01 +02:00
pci_irq.c s390/pci: provide support for CPU directed interrupts 2019-04-29 10:47:01 +02:00
pci_mmio.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci_sysfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci.c s390/pci: move everything irq related to pci_irq.c 2019-04-29 10:47:01 +02:00