Commit-ID: ab60491ee5d346557f152c7e8d3e7238c9b96c5c
Gitweb: https://git.kernel.org/tip/ab60491ee5d346557f152c7e8d3e7238c9b96c5c
Author: Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Sun, 8 Oct 2017 18:48:06 +0100
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Thu, 19 Oct 2017 11:22:41 +0100
irqchip/gic-v3-its: Make GICv4_ITS_LIST_MAX globally available
As we're about to make use of the maximum number of ITSs in
a GICv4 system, let's make this value global (and rename it to
GICv4_ITS_LIST_MAX).
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 10 ++--------
include/linux/irqchip/arm-gic-v4.h | 6 ++++++
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 994f087..a63b4ee 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -156,12 +156,6 @@ static DEFINE_SPINLOCK(its_lock);
static struct rdists *gic_rdists;
static struct irq_domain *its_parent;
-/*
- * We have a maximum number of 16 ITSs in the whole system if we're
- * using the ITSList mechanism
- */
-#define ITS_LIST_MAX 16
-
static unsigned long its_list_map;
static u16 vmovp_seq_num;
static DEFINE_RAW_SPINLOCK(vmovp_lock);
@@ -2988,8 +2982,8 @@ static int __init its_compute_its_list_map(struct resource *res,
* locking. Should this change, we should address
* this.
*/
- its_number = find_first_zero_bit(&its_list_map, ITS_LIST_MAX);
- if (its_number >= ITS_LIST_MAX) {
+ its_number = find_first_zero_bit(&its_list_map, GICv4_ITS_LIST_MAX);
+ if (its_number >= GICv4_ITS_LIST_MAX) {
pr_err("ITS@%pa: No ITSList entry available!\n",
&res->start);
return -EINVAL;
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 58a4d89..e26a668 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -20,6 +20,12 @@
struct its_vpe;
+/*
+ * Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
+ * ITSList mechanism to perform inter-ITS synchronization.
+ */
+#define GICv4_ITS_LIST_MAX 16
+
/* Embedded in kvm.arch */
struct its_vm {
struct fwnode_handle *fwnode;
--
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