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irqchip/gic-v3-its: Split property table clearing from allocation 

As we're going to reuse some pre-allocated memory for the property
table, split out the zeroing of that table into a separate function
for later use.

Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
Tested-by: Lei Zhang <zhang.lei@jp.fujitsu.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2018-07-27 15:02:27 +01:00
parent adaab500dd
commit 053be4854f
1 changed files with 10 additions and 7 deletions
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17
drivers/irqchip/irq-gic-v3-its.c
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@ -1597,6 +1597,15 @@ static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids)
kfree(bitmap);
}
static void gic_reset_prop_table(void *va)
{
/* Priority 0xa0, Group-1, disabled */
memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ);
/* Make sure the GIC will observe the written configuration */
gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ);
}
static struct page *its_allocate_prop_table(gfp_t gfp_flags)
{
struct page *prop_page;
@ -1605,13 +1614,7 @@ static struct page *its_allocate_prop_table(gfp_t gfp_flags)
if (!prop_page)
return NULL;
/* Priority 0xa0, Group-1, disabled */
memset(page_address(prop_page),
LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1,
LPI_PROPBASE_SZ);
/* Make sure the GIC will observe the written configuration */
gic_flush_dcache_to_poc(page_address(prop_page), LPI_PROPBASE_SZ);
gic_reset_prop_table(page_address(prop_page));
return prop_page;
}