From 071e7310e69368de551388088827c57df05f59aa Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Mon, 1 Apr 2024 13:54:02 -0600 Subject: vfio/pci: Pass eventfd context to IRQ handler Create a link back to the vfio_pci_core_device on the eventfd context object to avoid lookups in the interrupt path. The context is known valid in the interrupt handler. Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20240401195406.3720453-2-alex.williamson@redhat.com Signed-off-by: Alex Williamson --- drivers/vfio/pci/vfio_pci_intrs.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) (limited to 'drivers/vfio') diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index fb5392b749ff..31dbc2d061f3 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -23,11 +23,12 @@ #include "vfio_pci_priv.h" struct vfio_pci_irq_ctx { - struct eventfd_ctx *trigger; - struct virqfd *unmask; - struct virqfd *mask; - char *name; - bool masked; + struct vfio_pci_core_device *vdev; + struct eventfd_ctx *trigger; + struct virqfd *unmask; + struct virqfd *mask; + char *name; + bool masked; struct irq_bypass_producer producer; }; @@ -228,15 +229,11 @@ void vfio_pci_intx_unmask(struct vfio_pci_core_device *vdev) static irqreturn_t vfio_intx_handler(int irq, void *dev_id) { - struct vfio_pci_core_device *vdev = dev_id; - struct vfio_pci_irq_ctx *ctx; + struct vfio_pci_irq_ctx *ctx = dev_id; + struct vfio_pci_core_device *vdev = ctx->vdev; unsigned long flags; int ret = IRQ_NONE; - ctx = vfio_irq_ctx_get(vdev, 0); - if (WARN_ON_ONCE(!ctx)) - return ret; - spin_lock_irqsave(&vdev->irqlock, flags); if (!vdev->pci_2_3) { @@ -282,6 +279,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev, ctx->name = name; ctx->trigger = trigger; + ctx->vdev = vdev; /* * Fill the initial masked state based on virq_disabled. After @@ -312,7 +310,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev, vdev->irq_type = VFIO_PCI_INTX_IRQ_INDEX; ret = request_irq(pdev->irq, vfio_intx_handler, - irqflags, ctx->name, vdev); + irqflags, ctx->name, ctx); if (ret) { vdev->irq_type = VFIO_PCI_NUM_IRQS; kfree(name); @@ -358,7 +356,7 @@ static void vfio_intx_disable(struct vfio_pci_core_device *vdev) if (ctx) { vfio_virqfd_disable(&ctx->unmask); vfio_virqfd_disable(&ctx->mask); - free_irq(pdev->irq, vdev); + free_irq(pdev->irq, ctx); if (ctx->trigger) eventfd_ctx_put(ctx->trigger); kfree(ctx->name); -- cgit v1.2.3