Commit 7c297a2d authored by Marc Zyngier's avatar Marc Zyngier

irqchip/gic-v3-its: Split out pending table allocation

Just as for the property table, let's move the pending table
allocation to a separate function.
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 4cacac57
...@@ -1208,6 +1208,24 @@ static int its_alloc_collections(struct its_node *its) ...@@ -1208,6 +1208,24 @@ static int its_alloc_collections(struct its_node *its)
return 0; return 0;
} }
static struct page *its_allocate_pending_table(gfp_t gfp_flags)
{
struct page *pend_page;
/*
* The pending pages have to be at least 64kB aligned,
* hence the 'max(LPI_PENDBASE_SZ, SZ_64K)' below.
*/
pend_page = alloc_pages(gfp_flags | __GFP_ZERO,
get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K)));
if (!pend_page)
return NULL;
/* Make sure the GIC will observe the zero-ed page */
gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ);
return pend_page;
}
static void its_cpu_init_lpis(void) static void its_cpu_init_lpis(void)
{ {
void __iomem *rbase = gic_data_rdist_rd_base(); void __iomem *rbase = gic_data_rdist_rd_base();
...@@ -1218,21 +1236,14 @@ static void its_cpu_init_lpis(void) ...@@ -1218,21 +1236,14 @@ static void its_cpu_init_lpis(void)
pend_page = gic_data_rdist()->pend_page; pend_page = gic_data_rdist()->pend_page;
if (!pend_page) { if (!pend_page) {
phys_addr_t paddr; phys_addr_t paddr;
/*
* The pending pages have to be at least 64kB aligned, pend_page = its_allocate_pending_table(GFP_NOWAIT);
* hence the 'max(LPI_PENDBASE_SZ, SZ_64K)' below.
*/
pend_page = alloc_pages(GFP_NOWAIT | __GFP_ZERO,
get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K)));
if (!pend_page) { if (!pend_page) {
pr_err("Failed to allocate PENDBASE for CPU%d\n", pr_err("Failed to allocate PENDBASE for CPU%d\n",
smp_processor_id()); smp_processor_id());
return; return;
} }
/* Make sure the GIC will observe the zero-ed page */
gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ);
paddr = page_to_phys(pend_page); paddr = page_to_phys(pend_page);
pr_info("CPU%d: using LPI pending table @%pa\n", pr_info("CPU%d: using LPI pending table @%pa\n",
smp_processor_id(), &paddr); smp_processor_id(), &paddr);
......
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