leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

irqchip/gic-v3-its: Narrow down Entry Size when used as a divider

Browse Source 
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: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Vladimir Murzin 2016-11-02 11:54:04 +00:00 committed by Marc Zyngier
parent b11283eb89
commit d524eaa2a8
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/irqchip/irq-gic-v3-its.c
View File

@ -948,7 +948,7 @@ retry_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);
}