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Commit fe8e9350 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

irqchip/gic-v3-its: Use full range of LPIs 



As we used to represent the LPI range using a bitmap, we were reducing
the number of LPIs to at most 64k in order to preserve memory.

With our new allocator, there is no such need, as dealing with 2^16
or 2^32 LPIs takes the same amount of memory.

So let's use the number of IntID bits reported by the GIC instead of
an arbitrary limit.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 880cb3cd

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

+1 −2
Original line number Diff line number Diff line
@@ -1445,7 +1445,6 @@ static struct irq_chip its_irq_chip = { 
 */

#define IRQS_PER_CHUNK_SHIFT	5

#define IRQS_PER_CHUNK		(1UL << IRQS_PER_CHUNK_SHIFT)

#define ITS_MAX_LPI_NRBITS	16 /* 64K LPIs */



static DEFINE_MUTEX(lpi_range_lock);

static LIST_HEAD(lpi_range_list);
@@ -1626,7 +1625,7 @@ static int __init its_alloc_lpi_tables(void) 
{

	phys_addr_t paddr;



	lpi_id_bits = min_t(u32, gic_rdists->id_bits, ITS_MAX_LPI_NRBITS);

	lpi_id_bits = gic_rdists->id_bits;

	gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT);

	if (!gic_rdists->prop_page) {

		pr_err("Failed to allocate PROPBASE\n");