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Commit ab60491e authored by Marc Zyngier's avatar Marc Zyngier
Browse files

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: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent debf6d02

drivers/irqchip/irq-gic-v3-its.c

+2 −8
Original line number Diff line number Diff line
@@ -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;

include/linux/irqchip/arm-gic-v4.h

+6 −0
Original line number Diff line number Diff line
@@ -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;