[PATCH 3/9] iommu/amd: Implement select() method on remapping irqdomain
From: David Woodhouse <dwmw2@infradead.org>
Date: 2020-10-13 08:11:54
Also in:
kvm, linux-iommu, lkml
Subsystem:
amd iommu (amd-vi), iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
From: David Woodhouse <redacted> Signed-off-by: David Woodhouse <redacted> --- drivers/iommu/amd/iommu.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 13d0a8f42d56..7ecebc5d255f 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c@@ -3590,6 +3590,24 @@ struct irq_remap_ops amd_iommu_irq_ops = { .get_irq_domain = get_irq_domain, }; +static int irq_remapping_select(struct irq_domain *d, struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token) +{ + struct amd_iommu *iommu; + int devid = -1; + + if (x86_fwspec_is_ioapic(fwspec)) + devid = get_ioapic_devid(fwspec->param[0]); + else if (x86_fwspec_is_ioapic(fwspec)) + devid = get_hpet_devid(fwspec->param[0]); + + if (devid < 0) + return 0; + + iommu = amd_iommu_rlookup_table[devid]; + return iommu && iommu->ir_domain == d; +} + static void irq_remapping_prepare_irte(struct amd_ir_data *data, struct irq_cfg *irq_cfg, struct irq_alloc_info *info,
@@ -3813,6 +3831,7 @@ static void irq_remapping_deactivate(struct irq_domain *domain, } static const struct irq_domain_ops amd_ir_domain_ops = { + .select = irq_remapping_select, .alloc = irq_remapping_alloc, .free = irq_remapping_free, .activate = irq_remapping_activate,
--
2.26.2