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irqchip/gic-v3: Dynamically allocate PPI partition descriptors

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Again, PPIs are becoming a variable set. Let's hack the PPI partition
code to make the top-level array dynamically allocated.

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2019-07-18 13:05:17 +01:00
parent 81a4327304
commit 52085d3f20
1 changed files with 11 additions and 3 deletions
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14
drivers/irqchip/irq-gic-v3.c
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@ -52,7 +52,7 @@ struct gic_chip_data {
u64 flags;
bool has_rss;
unsigned int ppi_nr;
struct partition_desc *ppi_descs[16];
struct partition_desc **ppi_descs;
};
static struct gic_chip_data gic_data __read_mostly;
@ -1354,7 +1354,8 @@ static int gic_irq_domain_select(struct irq_domain *d,
* then we need to match the partition domain.
*/
if (fwspec->param_count >= 4 &&
fwspec->param[0] == 1 && fwspec->param[3] != 0)
fwspec->param[0] == 1 && fwspec->param[3] != 0 &&
gic_data.ppi_descs)
return d == partition_get_domain(gic_data.ppi_descs[fwspec->param[1]]);
return d == gic_data.domain;
@ -1375,6 +1376,9 @@ static int partition_domain_translate(struct irq_domain *d,
struct device_node *np;
int ret;
if (!gic_data.ppi_descs)
return -ENOMEM;
np = of_find_node_by_phandle(fwspec->param[3]);
if (WARN_ON(!np))
return -EINVAL;
@ -1531,6 +1535,10 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
if (!parts_node)
return;
gic_data.ppi_descs = kcalloc(gic_data.ppi_nr, sizeof(*gic_data.ppi_descs), GFP_KERNEL);
if (!gic_data.ppi_descs)
return;
nr_parts = of_get_child_count(parts_node);
if (!nr_parts)
@ -1582,7 +1590,7 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
part_idx++;
}
for (i = 0; i < 16; i++) {
for (i = 0; i < gic_data.ppi_nr; i++) {
unsigned int irq;
struct partition_desc *desc;
struct irq_fwspec ppi_fwspec = {