[PATCH 0/3] Enable multiple MSI feature in pSeries

Mike Qiu
2013-01-15T07:39:11Z

Currently, multiple MSI feature hasn't been enabled in pSeries,
These patches try to enbale this feature.

These patches have been tested by using ipr driver, and the driver patch
has been made by Wen Xiong <wenxiong@linux.vnet.ibm.com>:

[PATCH 0/7] Add support for new IBM SAS controllers

Test platform: One partition of pSeries with one cpu core(4 SMTs) and
RAID bus controller: IBM PCI-E IPR SAS Adapter (ASIC) in POWER7
OS version: SUSE Linux Enterprise Server 11 SP2 (ppc64) with 3.8-rc3 kernel

IRQ 21 and 22 are assigned to the ipr device which support 2 mutiple MSI.

The test results is shown by 'cat /proc/interrups':
CPU0 CPU1 CPU2 CPU3
16: 240458 261601 226310 200425 XICS Level IPI
17: 0 0 0 0 XICS Level RAS_EPOW
18: 10 0 3 2 XICS Level hvc_console
19: 122182 28481 28527 28864 XICS Level ibmvscsi
20: 506 7388226 108 118 XICS Level eth0
21: 6 5 5 5 XICS Level host1-0
22: 817 814 816 813 XICS Level host1-1
LOC: 398077 316725 231882 203049 Local timer interrupts
SPU: 1659 919 961 903 Spurious interrupts
CNT: 0 0 0 0 Performance
monitoring interrupts
MCE: 0 0 0 0 Machine check exceptions

Mike Qiu (3):
irq: Set multiple MSI descriptor data for multiple IRQs
irq: Add hw continuous IRQs map to virtual continuous IRQs support
powerpc/pci: Enable pSeries multiple MSI feature

arch/powerpc/kernel/msi.c | 4 --
arch/powerpc/platforms/pseries/msi.c | 62 ++++++++++++++++++++++++++++++++-
include/linux/irq.h | 4 ++
include/linux/irqdomain.h | 3 ++
kernel/irq/chip.c | 40 ++++++++++++++++-----
kernel/irq/irqdomain.c | 61 +++++++++++++++++++++++++++++++++
6 files changed, 158 insertions(+), 16 deletions(-)

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1.7.7.6