Fill up the recently introduced gic_kvm_info with the virtual GIC
information.
Signed-off-by: Julien Grall <julien.gr...@arm.com>
---
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Jason Cooper <ja...@lakedaemon.net>
Cc: Marc Zyngier <marc.zyng...@arm.com>
Changes in v2:
- Use 0 rather than a negative value to know when the maintenance IRQ
is not present.
- Use resource for vcpu and vctrl
---
drivers/irqchip/irq-gic-v3.c | 36 ++++++++++++++++++++++++++++++++++
include/linux/irqchip/arm-gic-common.h | 1 +
2 files changed, 37 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index d7be6dd..9992600 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic-common.h>
#include <linux/irqchip/arm-gic-v3.h>
#include <asm/cputype.h>
@@ -53,6 +54,8 @@ struct gic_chip_data {
static struct gic_chip_data gic_data __read_mostly;
static struct static_key supports_deactivate = STATIC_KEY_INIT_TRUE;
+static struct gic_kvm_info gic_v3_kvm_info;
+
#define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist))
#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base)
#define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K)
@@ -811,6 +814,37 @@ static void gicv3_enable_quirks(void)
#endif
}
+static void __init gic_of_setup_kvm_info(struct device_node *node)
+{
+ int ret;
+ struct resource r;
+ u32 gicv_idx;
+
+ gic_v3_kvm_info.type = GIC_V3;
+
+ gic_v3_kvm_info.maint_irq = irq_of_parse_and_map(node, 0);
+
+ if (of_property_read_u32(node, "#redistributor-regions",
+ &gicv_idx))
+ gicv_idx = 1;
+
+ gicv_idx += 3; /* Also skip GICD, GICC, GICH */
+ ret = of_address_to_resource(node, gicv_idx, &r);
+ if (!ret) {
+ if (!PAGE_ALIGNED(r.start))
+ pr_warn("GICV physical address 0x%llx not page
aligned\n",
+ (unsigned long long)r.start);
+ else if (!PAGE_ALIGNED(resource_size(&r)))
+ pr_warn("GICV size 0x%llx not a multiple of page size
0x%lx\n",
+ (unsigned long long)resource_size(&r),
+ PAGE_SIZE);
+ else
+ gic_v3_kvm_info.vcpu = r;
+ }
+
+ gic_set_kvm_info(&gic_v3_kvm_info);
+}
+
static int __init gic_of_init(struct device_node *node, struct device_node
*parent)
{
void __iomem *dist_base;
@@ -908,6 +942,8 @@ static int __init gic_of_init(struct device_node *node,
struct device_node *pare
gic_cpu_init();
gic_cpu_pm_init();
+ gic_of_setup_kvm_info(node);
+
return 0;
out_free:
diff --git a/include/linux/irqchip/arm-gic-common.h
b/include/linux/irqchip/arm-gic-common.h
index f7723b9..15d68c6 100644
--- a/include/linux/irqchip/arm-gic-common.h
+++ b/include/linux/irqchip/arm-gic-common.h
@@ -15,6 +15,7 @@
enum gic_type {
GIC_V2,
+ GIC_V3,
};
struct gic_kvm_info {
--
1.9.1
