diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2014-05-30 19:34:18 +1000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-27 13:48:26 +0200 |
| commit | 51bba713fe1120ba7b0542216278f10e48349589 (patch) | |
| tree | 237f4370c8ef7fe34b4243ad109754e0ad493771 | |
| parent | ba0e5bf8de38a33ea2e09b40e0493d30b62fcbf0 (diff) | |
xics: Implement xics_ics_free()
This implements interrupt release function so IRQs can be returned back
to the pool for reuse in cases such as PCI hot plug.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | hw/intc/xics.c | 27 | ||||
| -rw-r--r-- | include/hw/ppc/xics.h | 1 | ||||
| -rw-r--r-- | trace-events | 2 |
3 files changed, 30 insertions, 0 deletions
diff --git a/hw/intc/xics.c b/hw/intc/xics.c index 6cd980a735..0fd2a84c7b 100644 --- a/hw/intc/xics.c +++ b/hw/intc/xics.c @@ -775,6 +775,33 @@ int xics_alloc_block(XICSState *icp, int src, int num, bool lsi, bool align) return first; } +static void ics_free(ICSState *ics, int srcno, int num) +{ + int i; + + for (i = srcno; i < srcno + num; ++i) { + if (ICS_IRQ_FREE(ics, i)) { + trace_xics_ics_free_warn(ics - ics->icp->ics, i + ics->offset); + } + memset(&ics->irqs[i], 0, sizeof(ICSIRQState)); + } +} + +void xics_free(XICSState *icp, int irq, int num) +{ + int src = xics_find_source(icp, irq); + + if (src >= 0) { + ICSState *ics = &icp->ics[src]; + + /* FIXME: implement multiple sources */ + assert(src == 0); + + trace_xics_ics_free(ics - icp->ics, irq, num); + ics_free(ics, irq - ics->offset, num); + } +} + /* * Guest interfaces */ diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h index 30b14419a4..a214dd7f28 100644 --- a/include/hw/ppc/xics.h +++ b/include/hw/ppc/xics.h @@ -162,6 +162,7 @@ qemu_irq xics_get_qirq(XICSState *icp, int irq); void xics_set_irq_type(XICSState *icp, int irq, bool lsi); int xics_alloc(XICSState *icp, int src, int irq_hint, bool lsi); int xics_alloc_block(XICSState *icp, int src, int num, bool lsi, bool align); +void xics_free(XICSState *icp, int irq, int num); void xics_cpu_setup(XICSState *icp, PowerPCCPU *cpu); diff --git a/trace-events b/trace-events index 2a46e6c737..51c08a79d9 100644 --- a/trace-events +++ b/trace-events @@ -1192,6 +1192,8 @@ 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" +xics_ics_free(int src, int irq, int num) "Source#%d, first irq %d, %d irqs" +xics_ics_free_warn(int src, int irq) "Source#%d, irq %d is already free" # hw/ppc/spapr.c spapr_cas_failed(unsigned long n) "DT diff buffer is too small: %ld bytes" |