The patch adds a simple helper which allocates a consecutive sequence
of IRQs calling spapr_allocate_irq for each and checks that allocated
IRQs go consequently.
The patch is required for upcoming support of MSI/MSIX on POWER.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
return irq;
}
+/* Allocate block of consequtive IRQs, returns a number of the first */
+int spapr_allocate_irq_block(int num, enum xics_irq_type type)
+{
+ int first = -1;
+ int i;
+
+ for (i = 0; i < num; ++i) {
+ int irq;
+
+ irq = spapr_allocate_irq(0, type);
+ if (!irq) {
+ return -1;
+ }
+
+ if (0 == i) {
+ first = irq;
+ }
+
+ /* If the above doesn't create a consecutive block then that's
+ * an internal bug */
+ assert(irq == (first + i));
+ }
+
+ return first;
+}
+
static int spapr_set_associativity(void *fdt, sPAPREnvironment *spapr)
{
int ret = 0, offset;
target_ulong *args);
int spapr_allocate_irq(int hint, enum xics_irq_type type);
+int spapr_allocate_irq_block(int num, enum xics_irq_type type);
static inline int spapr_allocate_msi(int hint)
{