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spapr_pci: Advertise MSI quota

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Hotplug of multiple disks fails due to MSI vector quota check.
Number of MSI vectors default to 8 allowing only 4 devices.
This happens on RHEL6.5 guest. RHEL7 and SLES11 guests fallback
to INTX.

One way to workaround the issue is to increase total MSIs,
so that MSI quota check allows us to hotplug multiple disks.

This sets the quota to the maximum number of interupts XICS has
which is 1024 now (XICS_IRQS). This moves XICS_IRQS from spapr.c
to xics.h for wider visibility.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
[aik: put XICS_IRQS=1024 instead of 64i, fixed endianness and size]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Badari Pulavarty 2014-06-11 18:49:33 +10:00 • committed by Alexander Graf
parent d13fc32ecf
commit 9dbae97723
3 changed files with 3 additions and 1 deletions
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2
include/hw/ppc/xics.h
View file

@ -152,6 +152,8 @@ struct ICSIRQState {
uint8_t status;
};
#define XICS_IRQS 1024
qemu_irq xics_get_qirq(XICSState *icp, int irq);
void xics_set_irq_type(XICSState *icp, int irq, bool lsi);