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Commit d524eaa2 authored by Vladimir Murzin's avatar Vladimir Murzin Committed by Marc Zyngier
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irqchip/gic-v3-its: Narrow down Entry Size when used as a divider 



GITS_BASER<n>'s Entry Size is much smaller than 64-bit, but when it
used as a divider it forces compiler to generate __aeabi_uldivmod if
build in 32-bit mode. So, casting it to int (like it is done in other
places) where used as a divider would give a hint to compiler that
32-bit division can be used.

Signed-off-by: default avatarVladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent b11283eb

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

+3 −3
Original line number Diff line number Diff line
@@ -948,7 +948,7 @@ static int its_setup_baser(struct its_node *its, struct its_baser *baser, 
	tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz;



	pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n",

		&its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / tmp),

		&its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp),

		its_base_type_string[type],

		(unsigned long)virt_to_phys(base),

		indirect ? "indirect" : "flat", (int)esz,
@@ -983,7 +983,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser 
			 * which is reported by ITS hardware times lvl1 table

			 * entry size.

			 */

			ids -= ilog2(psz / esz);

			ids -= ilog2(psz / (int)esz);

			esz = GITS_LVL1_ENTRY_SIZE;

		}

	}
@@ -998,7 +998,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser 
	new_order = max_t(u32, get_order(esz << ids), new_order);

	if (new_order >= MAX_ORDER) {

		new_order = MAX_ORDER - 1;

		ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / esz);

		ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz);

		pr_warn("ITS@%pa: Device Table too large, reduce ids %u->%u\n",

			&its->phys_base, its->device_ids, ids);

	}