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irqchip/gic-v3-its: Make GICv4_ITS_LIST_MAX globally available

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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@arm.com>
This commit is contained in:
Marc Zyngier 2017-10-08 18:48:06 +01:00
parent debf6d02bb
commit ab60491ee5
2 changed files with 8 additions and 8 deletions
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10
drivers/irqchip/irq-gic-v3-its.c
View File

@ -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;

6
include/linux/irqchip/arm-gic-v4.h
View File

@ -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;