Commit-ID: 4cacac5744d57f321ae17cb15456ec97d775860e
Gitweb: http://git.kernel.org/tip/4cacac5744d57f321ae17cb15456ec97d775860e
Author: Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Mon, 19 Dec 2016 18:18:34 +0000
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Wed, 23 Aug 2017 11:09:17 +0100
irqchip/gic-v3-its: Allow use of indirect VCPU tables
The VCPU tables can be quite sparse as well, and it makes sense
to use indirect tables as well if possible.
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 25 +++++++++++++++++--------
1 file changed, 17 insertions(+), 8 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 9d8d393..6ef6b0d 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1077,10 +1077,13 @@ retry_baser:
return 0;
}
-static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser,
- u32 psz, u32 *order)
+static bool its_parse_indirect_baser(struct its_node *its,
+ struct its_baser *baser,
+ u32 psz, u32 *order)
{
- u64 esz = GITS_BASER_ENTRY_SIZE(its_read_baser(its, baser));
+ u64 tmp = its_read_baser(its, baser);
+ u64 type = GITS_BASER_TYPE(tmp);
+ u64 esz = GITS_BASER_ENTRY_SIZE(tmp);
u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb;
u32 ids = its->device_ids;
u32 new_order = *order;
@@ -1119,8 +1122,9 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser
if (new_order >= MAX_ORDER) {
new_order = MAX_ORDER - 1;
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);
+ pr_warn("ITS@%pa: %s Table too large, reduce ids %u->%u\n",
+ &its->phys_base, its_base_type_string[type],
+ its->device_ids, ids);
}
*order = new_order;
@@ -1168,11 +1172,16 @@ static int its_alloc_tables(struct its_node *its)
u32 order = get_order(psz);
bool indirect = false;
- if (type == GITS_BASER_TYPE_NONE)
+ switch (type) {
+ case GITS_BASER_TYPE_NONE:
continue;
- if (type == GITS_BASER_TYPE_DEVICE)
- indirect = its_parse_baser_device(its, baser, psz, &order);
+ case GITS_BASER_TYPE_DEVICE:
+ case GITS_BASER_TYPE_VCPU:
+ indirect = its_parse_indirect_baser(its, baser,
+ psz, &order);
+ break;
+ }
err = its_setup_baser(its, baser, cache, shr, psz, order, indirect);
if (err < 0) {
--
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