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spapr: Move interrupt allocator to xics

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The current allocator returns IRQ numbers from a pool and does not
support IRQs reuse in any form as it did not keep track of what it
previously returned, it only keeps the last returned IRQ. Some use
cases such as PCI hot(un)plug may require IRQ release and reallocation.

This moves an allocator from SPAPR to XICS.

This switches IRQ users to use new API.

This uses LSI/MSI flags to know if interrupt is allocated.

The interrupt release function will be posted as a separate patch.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexey Kardashevskiy 2014-05-30 19:34:15 +10:00 • committed by Alexander Graf
parent a7e519a8cf
commit bee763dbfb
8 changed files with 99 additions and 82 deletions
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@ -1188,6 +1188,10 @@ xics_set_irq_lsi(int srcno, int nr) "set_irq_lsi: srcno %d [irq %#x]"
xics_ics_write_xive(int nr, int srcno, int server, uint8_t priority) "ics_write_xive: irq %#x [src %d] server %#x prio %#x"
xics_ics_reject(int nr, int srcno) "reject irq %#x [src %d]"
xics_ics_eoi(int nr) "ics_eoi: irq %#x"
xics_alloc(int src, int irq) "source#%d, irq %d"
xics_alloc_failed_hint(int src, int irq) "source#%d, irq %d is already in use"
xics_alloc_failed_no_left(int src) "source#%d, no irq left"
xics_alloc_block(int src, int first, int num, bool lsi, int align) "source#%d, first irq %d, %d irqs, lsi=%d, alignnum %d"
# hw/ppc/spapr.c
spapr_cas_failed(unsigned long n) "DT diff buffer is too small: %ld bytes"