Messages in this thread Patch in this message | | | From | Marc Zyngier <> | Subject | [PATCH 19/35] irqchip/gic-v4.1: Suppress per-VLPI doorbell | Date | Mon, 23 Sep 2019 19:25:50 +0100 |
| |
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> --- drivers/irqchip/irq-gic-v3-its.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index eda35e66237f..b791c9beddf2 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -691,7 +691,7 @@ 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; @@ -714,7 +714,7 @@ 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; @@ -1227,6 +1227,13 @@ static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) struct its_device *its_dev = irq_data_get_irq_chip_data(d); u32 event = its_get_event_id(d); + /* + * GICv4.1 does away with the per-LPI nonsense, nothing to do + * here. + */ + if (is_v4_1(its_dev->its)) + return; + if (its_dev->event_map.vlpi_maps[event].db_enabled == enable) return; -- 2.20.1
| |