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

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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: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2018-05-27 16:15:22 +01:00
parent 880cb3cddd
commit fe8e93504c
1 changed files with 1 additions and 2 deletions
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3
drivers/irqchip/irq-gic-v3-its.c
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@ -1445,7 +1445,6 @@ static struct irq_chip its_irq_chip = {
*/ */
#define IRQS_PER_CHUNK_SHIFT 5 #define IRQS_PER_CHUNK_SHIFT 5
#define IRQS_PER_CHUNK (1UL << IRQS_PER_CHUNK_SHIFT) #define IRQS_PER_CHUNK (1UL << IRQS_PER_CHUNK_SHIFT)
#define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */
static DEFINE_MUTEX(lpi_range_lock); static DEFINE_MUTEX(lpi_range_lock);
static LIST_HEAD(lpi_range_list); static LIST_HEAD(lpi_range_list);
@ -1626,7 +1625,7 @@ static int __init its_alloc_lpi_tables(void)
{ {
phys_addr_t paddr; 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); gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT);
if (!gic_rdists->prop_page) { if (!gic_rdists->prop_page) {
pr_err("Failed to allocate PROPBASE\n"); pr_err("Failed to allocate PROPBASE\n");