From ab60491ee5d346557f152c7e8d3e7238c9b96c5c Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Sun, 8 Oct 2017 18:48:06 +0100 Subject: [PATCH] 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 --- 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; -- 2.7.4