lkml.org 
[lkml]   [2019]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip: irq/core] irqchip/gic-v3: Dynamically allocate PPI partition descriptors
The following commit has been merged into the irq/core branch of tip:

Commit-ID: 52085d3f2028d853f8d6ce7ead2f8a504f6077fa
Gitweb: https://git.kernel.org/tip/52085d3f2028d853f8d6ce7ead2f8a504f6077fa
Author: Marc Zyngier <maz@kernel.org>
AuthorDate: Thu, 18 Jul 2019 13:05:17 +01:00
Committer: Marc Zyngier <maz@kernel.org>
CommitterDate: Tue, 20 Aug 2019 10:23:34 +01:00

irqchip/gic-v3: Dynamically allocate PPI partition descriptors

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>
---
drivers/irqchip/irq-gic-v3.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 869a805..f5dbdbf 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -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 = {
\
 
 \ /
  Last update: 2019-09-06 13:09    [W:0.865 / U:0.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site