From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48082) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYXKu-0000Zo-Lm for qemu-devel@nongnu.org; Thu, 19 Mar 2015 06:05:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YYXKp-0001HI-JA for qemu-devel@nongnu.org; Thu, 19 Mar 2015 06:05:56 -0400 Received: from mail-wi0-f171.google.com ([209.85.212.171]:37594) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYXKp-0001HC-Ce for qemu-devel@nongnu.org; Thu, 19 Mar 2015 06:05:51 -0400 Received: by wixw10 with SMTP id w10so64307450wix.0 for ; Thu, 19 Mar 2015 03:05:50 -0700 (PDT) From: Eric Auger Date: Thu, 19 Mar 2015 10:05:33 +0000 Message-Id: <1426759538-18030-5-git-send-email-eric.auger@linaro.org> In-Reply-To: <1426759538-18030-1-git-send-email-eric.auger@linaro.org> References: <1426759538-18030-1-git-send-email-eric.auger@linaro.org> Subject: [Qemu-devel] [PATCH v11 4/9] hw/vfio/platform: add capability to start IRQ propagation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, alex.williamson@redhat.com, peter.maydell@linaro.org, agraf@suse.de, b.reynal@virtualopensystems.com Cc: kim.phillips@freescale.com, patches@linaro.org, a.rigo@virtualopensystems.com, pbonzini@redhat.com, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org Add a reset notify function that enables to start the propagation of interrupts to the guest. Signed-off-by: Eric Auger --- v10 -> v11: - comment reword v8 -> v9: - handle failure in vfio_irq_starter --- hw/vfio/platform.c | 64 +++++++++++++++++++++++++++++++++++++++++ include/hw/vfio/vfio-platform.h | 8 ++++++ 2 files changed, 72 insertions(+) diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c index 933940c..59eeca2 100644 --- a/hw/vfio/platform.c +++ b/hw/vfio/platform.c @@ -572,6 +572,70 @@ static void vfio_platform_realize(DeviceState *dev, Error **errp) } } +/** + * vfio_irq_starter: Start IRQ forwarding for a specific VFIO device + * @sbdev: Sysbus device handle + * @opaque: DeviceState handle of the interrupt controller the device + * is attached to + * + * The function retrieves the absolute GSI number each VFIO IRQ + * corresponds to and start forwarding. + */ +static int vfio_irq_starter(SysBusDevice *sbdev, void *opaque) +{ + DeviceState *intc = (DeviceState *)opaque; + VFIOPlatformDevice *vdev; + VFIOINTp *intp; + qemu_irq irq; + int gsi, ret; + + if (object_dynamic_cast(OBJECT(sbdev), TYPE_VFIO_PLATFORM)) { + vdev = VFIO_PLATFORM_DEVICE(sbdev); + + QLIST_FOREACH(intp, &vdev->intp_list, next) { + gsi = 0; + while (1) { + irq = qdev_get_gpio_in(intc, gsi); + if (irq == intp->qemuirq) { + break; + } + gsi++; + } + intp->virtualID = gsi; + ret = vdev->start_irq_fn(intp); + if (ret) { + error_report("%s unable to start propagation of IRQ index %d", + vdev->vbasedev.name, intp->pin); + exit(1); + } + } + } + return 0; +} + +/** + * vfio_kick_irqs: start IRQ forwarding for all the VFIO devices + * attached to the platform bus + * @data: Device state handle of the interrupt controller the VFIO IRQs + * must be bound to + * + * Binding to the platform bus IRQs happens on a machine init done + * notifier registered by the platform bus. Only at that time the + * absolute virtual IRQ = GSI is known and allows to setup IRQFD. + * This function typically can be called in a reset notifier registered + * by the machine file. + */ +void vfio_kick_irqs(void *data) +{ + DeviceState *intc = (DeviceState *)data; + DeviceState *dev = + qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DEVICE); + PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(dev); + + assert(pbus->done_gathering); + foreach_dynamic_sysbus_device(vfio_irq_starter, intc); +} + static const VMStateDescription vfio_platform_vmstate = { .name = TYPE_VFIO_PLATFORM, .unmigratable = 1, diff --git a/include/hw/vfio/vfio-platform.h b/include/hw/vfio/vfio-platform.h index 31893a3..c9ee898 100644 --- a/include/hw/vfio/vfio-platform.h +++ b/include/hw/vfio/vfio-platform.h @@ -77,4 +77,12 @@ typedef struct VFIOPlatformDeviceClass { #define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \ OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM) +/** + * vfio_kick_irqs - reset notifier that starts IRQ injection + * for all VFIO dynamic sysbus devices attached to the platform bus. + * + * @opaque: handle to the interrupt controller DeviceState + */ +void vfio_kick_irqs(void *opaque); + #endif /*HW_VFIO_VFIO_PLATFORM_H*/ -- 1.8.3.2