From f4a81f5a853e0b7c38bfad3afd6d0365d654e777 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 24 Dec 2019 11:10:38 +0000 Subject: irqchip/gic-v4.1: Allow direct invalidation of VLPIs Just like for INVALL, GICv4.1 has grown a VPE-aware INVLPI register. Let's plumb it in and make use of the DirectLPI code in that case. Signed-off-by: Marc Zyngier Reviewed-by: Zenghui Yu Link: https://lore.kernel.org/r/20191224111055.11836-16-maz@kernel.org --- drivers/irqchip/irq-gic-v3-its.c | 55 ++++++++++++++++++++++++++-------------- 1 file changed, 36 insertions(+), 19 deletions(-) (limited to 'drivers') diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 53e91c98acb2..f71758632f8d 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -227,11 +227,27 @@ static struct its_vlpi_map *dev_event_to_vlpi_map(struct its_device *its_dev, return &its_dev->event_map.vlpi_maps[event]; } -static struct its_collection *irq_to_col(struct irq_data *d) +static struct its_vlpi_map *get_vlpi_map(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) { + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + return dev_event_to_vlpi_map(its_dev, event); + } + + return NULL; +} + +static int irq_to_cpuid(struct irq_data *d) { struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_vlpi_map *map = get_vlpi_map(d); + + if (map) + return map->vpe->col_idx; - return dev_event_to_col(its_dev, its_get_event_id(d)); + return its_dev->event_map.col_map[its_get_event_id(d)]; } static struct its_collection *valid_col(struct its_collection *col) @@ -1269,18 +1285,6 @@ static void its_send_invdb(struct its_node *its, struct its_vpe *vpe) /* * irqchip functions - assumes MSI, mostly. */ -static struct its_vlpi_map *get_vlpi_map(struct irq_data *d) -{ - if (irqd_is_forwarded_to_vcpu(d)) { - struct its_device *its_dev = irq_data_get_irq_chip_data(d); - u32 event = its_get_event_id(d); - - return dev_event_to_vlpi_map(its_dev, event); - } - - return NULL; -} - static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) { struct its_vlpi_map *map = get_vlpi_map(d); @@ -1323,13 +1327,25 @@ static void wait_for_syncr(void __iomem *rdbase) static void direct_lpi_inv(struct irq_data *d) { - struct its_collection *col; + struct its_vlpi_map *map = get_vlpi_map(d); void __iomem *rdbase; + u64 val; + + if (map) { + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + WARN_ON(!is_v4_1(its_dev->its)); + + val = GICR_INVLPIR_V; + val |= FIELD_PREP(GICR_INVLPIR_VPEID, map->vpe->vpe_id); + val |= FIELD_PREP(GICR_INVLPIR_INTID, map->vintid); + } else { + val = d->hwirq; + } /* Target the redistributor this LPI is currently routed to */ - col = irq_to_col(d); - rdbase = per_cpu_ptr(gic_rdists->rdist, col->col_id)->rd_base; - gic_write_lpir(d->hwirq, rdbase + GICR_INVLPIR); + rdbase = per_cpu_ptr(gic_rdists->rdist, irq_to_cpuid(d))->rd_base; + gic_write_lpir(val, rdbase + GICR_INVLPIR); wait_for_syncr(rdbase); } @@ -1339,7 +1355,8 @@ static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) struct its_device *its_dev = irq_data_get_irq_chip_data(d); lpi_write_config(d, clr, set); - if (gic_rdists->has_direct_lpi && !irqd_is_forwarded_to_vcpu(d)) + if (gic_rdists->has_direct_lpi && + (is_v4_1(its_dev->its) || !irqd_is_forwarded_to_vcpu(d))) direct_lpi_inv(d); else if (!irqd_is_forwarded_to_vcpu(d)) its_send_inv(its_dev, its_get_event_id(d)); -- cgit v1.2.3