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| author |   Marc Zyngier <maz@kernel.org> | 2019-12-24 11:10:34 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-01-22 14:22:20 +0000 |
| commit | 91bf6395f7b8614a5a9934a0ae9c8b5312d77b29 (patch) | |
| tree | 115c5c5ff3e749fe7dbc6c23c00f520000aa02f9 /drivers/irqchip | |
| parent | irqchip/gic-v4.1: Add mask/unmask doorbell callbacks (diff) | |
| download | wireguard-linux-91bf6395f7b8614a5a9934a0ae9c8b5312d77b29.tar.xz wireguard-linux-91bf6395f7b8614a5a9934a0ae9c8b5312d77b29.zip | |
irqchip/gic-v4.1: Add VPE residency callback
Making a VPE resident on GICv4.1 is pretty simple, as it is just a
single write to the local redistributor. We just need extra information
about which groups to enable, which the KVM code will have to provide.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20191224111055.11836-12-maz@kernel.org
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 5ef706e8fc1f..3adc597e2a82 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -3624,12 +3624,29 @@ static void its_vpe_4_1_unmask_irq(struct irq_data *d) its_vpe_4_1_send_inv(d); } +static void its_vpe_4_1_schedule(struct its_vpe *vpe, + struct its_cmd_info *info) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val = 0; + + /* Schedule the VPE */ + val |= GICR_VPENDBASER_Valid; + val |= info->g0en ? GICR_VPENDBASER_4_1_VGRP0EN : 0; + val |= info->g1en ? GICR_VPENDBASER_4_1_VGRP1EN : 0; + val |= FIELD_PREP(GICR_VPENDBASER_4_1_VPEID, vpe->vpe_id); + + gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); +} + static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) { + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); struct its_cmd_info *info = vcpu_info; switch (info->cmd_type) { case SCHEDULE_VPE: + its_vpe_4_1_schedule(vpe, info); return 0; case DESCHEDULE_VPE: |