diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index eec37b2f54df..089e1ed4deec 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -4269,4 +4269,43 @@ int amd_iommu_create_irq_domain(struct amd_iommu *iommu) return 0; } + +int amd_iommu_update_ga(int cpu, bool is_run, void *data) +{ + unsigned long flags; + struct amd_iommu *iommu; + struct irq_remap_table *irt; + struct amd_ir_data *ir_data = (struct amd_ir_data *)data; + int devid = ir_data->irq_2_irte.devid; + struct irte_ga *entry = (struct irte_ga *) ir_data->entry; + struct irte_ga *ref = (struct irte_ga *) ir_data->ref; + + if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) || + !ref || !entry || !entry->lo.fields_vapic.guest_mode) + return 0; + + iommu = amd_iommu_rlookup_table[devid]; + if (!iommu) + return -ENODEV; + + irt = get_irq_table(devid, false); + if (!irt) + return -ENODEV; + + spin_lock_irqsave(&irt->lock, flags); + + if (ref->lo.fields_vapic.guest_mode) { + if (cpu >= 0) + ref->lo.fields_vapic.destination = cpu; + ref->lo.fields_vapic.is_run = is_run; + barrier(); + } + + spin_unlock_irqrestore(&irt->lock, flags); + + iommu_flush_irt(iommu, devid); + iommu_completion_wait(iommu); + return 0; +} +EXPORT_SYMBOL(amd_iommu_update_ga); #endif |