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irqchip/gic-v4.1: Suppress per-VLPI doorbell 

Since GICv4.1 gives us a per-VPE doorbell, avoid programming anything
else on VMOVI/VMAPI/VMAPTI and on any other action that would have
otherwise resulted in a per-VLPI doorbell to be programmed.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20191224111055.11836-15-maz@kernel.org
This commit is contained in:
Marc Zyngier 2019-12-24 11:10:37 +00:00
parent b4a4bd0f26
commit 3858d4dfdf
1 changed files with 9 additions and 2 deletions
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11
drivers/irqchip/irq-gic-v3-its.c
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@ -718,7 +718,7 @@ static struct its_vpe *its_build_vmapti_cmd(struct its_node *its,
{
u32 db;
if (desc->its_vmapti_cmd.db_enabled)
if (!is_v4_1(its) && desc->its_vmapti_cmd.db_enabled)
db = desc->its_vmapti_cmd.vpe->vpe_db_lpi;
else
db = 1023;
@ -741,7 +741,7 @@ static struct its_vpe *its_build_vmovi_cmd(struct its_node *its,
{
u32 db;
if (desc->its_vmovi_cmd.db_enabled)
if (!is_v4_1(its) && desc->its_vmovi_cmd.db_enabled)
db = desc->its_vmovi_cmd.vpe->vpe_db_lpi;
else
db = 1023;
@ -1353,6 +1353,13 @@ static void its_vlpi_set_doorbell(struct irq_data *d, bool enable)
u32 event = its_get_event_id(d);
struct its_vlpi_map *map;
/*
* GICv4.1 does away with the per-LPI nonsense, nothing to do
* here.
*/
if (is_v4_1(its_dev->its))
return;
map = dev_event_to_vlpi_map(its_dev, event);
if (map->db_enabled == enable)