From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33214) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YM7E5-0005NX-Lf for qemu-devel@nongnu.org; Thu, 12 Feb 2015 22:47:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YM7Dz-0004Ys-CC for qemu-devel@nongnu.org; Thu, 12 Feb 2015 22:47:30 -0500 Received: from mail-wi0-f178.google.com ([209.85.212.178]:55790) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YM7Dz-0004Ym-64 for qemu-devel@nongnu.org; Thu, 12 Feb 2015 22:47:27 -0500 Received: by mail-wi0-f178.google.com with SMTP id em10so9138810wid.5 for ; Thu, 12 Feb 2015 19:47:26 -0800 (PST) From: Eric Auger Date: Fri, 13 Feb 2015 03:47:09 +0000 Message-Id: <1423799232-10816-5-git-send-email-eric.auger@linaro.org> In-Reply-To: <1423799232-10816-1-git-send-email-eric.auger@linaro.org> References: <1423799232-10816-1-git-send-email-eric.auger@linaro.org> Subject: [Qemu-devel] [PATCH v10 4/7] 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, christoffer.dall@linaro.org, qemu-devel@nongnu.org, alex.williamson@redhat.com, peter.maydell@linaro.org, agraf@suse.de, b.reynal@virtualopensystems.com, feng.wu@intel.com Cc: kim.phillips@freescale.com, patches@linaro.org, a.rigo@virtualopensystems.com, afaerber@suse.de, Bharat.Bhushan@freescale.com, a.motakis@virtualopensystems.com, pbonzini@redhat.com, kvmarm@lists.cs.columbia.edu Add a reset notify function that enables to start the propagation of interrupts to the guest. Signed-off-by: Eric Auger --- v8 -> v9: - handle failure in vfio_irq_starter --- hw/vfio/platform.c | 52 +++++++++++++++++++++++++++++++++++++++++ include/hw/vfio/vfio-platform.h | 8 +++++++ 2 files changed, 60 insertions(+) diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c index b85ad6c..30798d8 100644 --- a/hw/vfio/platform.c +++ b/hw/vfio/platform.c @@ -553,6 +553,58 @@ static void vfio_platform_realize(DeviceState *dev, Error **errp) } } +/* + * Binding to the platform bus IRQ 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. + * vfio_kick_irqs can typically be used as a reset notifier function. + */ + +/* Start injection of IRQ for a specific VFIO device */ +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; +} + +/* loop on all VFIO platform devices and start their IRQ injection */ +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 e55b711..bd1206e 100644 --- a/include/hw/vfio/vfio-platform.h +++ b/include/hw/vfio/vfio-platform.h @@ -74,4 +74,12 @@ 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