diff options
| author | Harsh Prateek Bora <harshpb@linux.ibm.com> | 2024-01-24 10:30:55 +1000 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2024-04-16 21:16:09 +0300 |
| commit | 3f481e33056c83044fcf7a6873be04ffc47b195a (patch) | |
| tree | 7bc16f9623b7bae164362c12e2a5b00b80c31517 | |
| parent | 4741ae6b8ee733b587a20a384dd850f992717b8a (diff) | |
| download | qemu-3f481e33056c83044fcf7a6873be04ffc47b195a.zip qemu-3f481e33056c83044fcf7a6873be04ffc47b195a.tar.gz qemu-3f481e33056c83044fcf7a6873be04ffc47b195a.tar.bz2 | |
ppc/spapr: Introduce SPAPR_IRQ_NR_IPIS to refer IRQ range for CPU IPIs.
spapr_irq_init currently uses existing macro SPAPR_XIRQ_BASE to refer to
the range of CPU IPIs during initialization of nr-irqs property.
It is more appropriate to have its own define which can be further
reused as appropriate for correct interpretation.
Suggested-by: Cedric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Kowshik Jois <kowsjois@linux.ibm.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
(cherry picked from commit 2df5c1f5b014126595a26c6797089d284a3b211c)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
| -rw-r--r-- | hw/ppc/spapr_irq.c | 6 | ||||
| -rw-r--r-- | include/hw/ppc/spapr_irq.h | 14 |
2 files changed, 17 insertions, 3 deletions
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c index a0d1e12..97b2fc4 100644 --- a/hw/ppc/spapr_irq.c +++ b/hw/ppc/spapr_irq.c @@ -23,6 +23,8 @@ #include "trace.h" +QEMU_BUILD_BUG_ON(SPAPR_IRQ_NR_IPIS > SPAPR_XIRQ_BASE); + static const TypeInfo spapr_intc_info = { .name = TYPE_SPAPR_INTC, .parent = TYPE_INTERFACE, @@ -329,7 +331,7 @@ void spapr_irq_init(SpaprMachineState *spapr, Error **errp) int i; dev = qdev_new(TYPE_SPAPR_XIVE); - qdev_prop_set_uint32(dev, "nr-irqs", smc->nr_xirqs + SPAPR_XIRQ_BASE); + qdev_prop_set_uint32(dev, "nr-irqs", smc->nr_xirqs + SPAPR_IRQ_NR_IPIS); /* * 8 XIVE END structures per CPU. One for each available * priority @@ -356,7 +358,7 @@ void spapr_irq_init(SpaprMachineState *spapr, Error **errp) } spapr->qirqs = qemu_allocate_irqs(spapr_set_irq, spapr, - smc->nr_xirqs + SPAPR_XIRQ_BASE); + smc->nr_xirqs + SPAPR_IRQ_NR_IPIS); /* * Mostly we don't actually need this until reset, except that not diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h index c22a72c..4fd2d58 100644 --- a/include/hw/ppc/spapr_irq.h +++ b/include/hw/ppc/spapr_irq.h @@ -14,9 +14,21 @@ #include "qom/object.h" /* - * IRQ range offsets per device type + * The XIVE IRQ backend uses the same layout as the XICS backend but + * covers the full range of the IRQ number space. The IRQ numbers for + * the CPU IPIs are allocated at the bottom of this space, below 4K, + * to preserve compatibility with XICS which does not use that range. + */ + +/* + * CPU IPI range (XIVE only) */ #define SPAPR_IRQ_IPI 0x0 +#define SPAPR_IRQ_NR_IPIS 0x1000 + +/* + * IRQ range offsets per device type + */ #define SPAPR_XIRQ_BASE XICS_IRQ_BASE /* 0x1000 */ #define SPAPR_IRQ_EPOW (SPAPR_XIRQ_BASE + 0x0000) |