From patchwork Mon Jul 2 12:38:47 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kiszka X-Patchwork-Id: 168589 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 9A93F2C009F for ; Mon, 2 Jul 2012 22:39:05 +1000 (EST) Received: from localhost ([::1]:45305 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SlfuB-00066P-HP for incoming@patchwork.ozlabs.org; Mon, 02 Jul 2012 08:39:03 -0400 Received: from eggs.gnu.org ([208.118.235.92]:59893) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Slfu4-00066G-A5 for qemu-devel@nongnu.org; Mon, 02 Jul 2012 08:38:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Slftz-0001cF-LR for qemu-devel@nongnu.org; Mon, 02 Jul 2012 08:38:55 -0400 Received: from goliath.siemens.de ([192.35.17.28]:28796) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Slftz-0001bn-BV for qemu-devel@nongnu.org; Mon, 02 Jul 2012 08:38:51 -0400 Received: from mail1.siemens.de (localhost [127.0.0.1]) by goliath.siemens.de (8.13.6/8.13.6) with ESMTP id q62CcmMW018801; Mon, 2 Jul 2012 14:38:48 +0200 Received: from mchn199C.mchp.siemens.de ([139.25.109.49]) by mail1.siemens.de (8.13.6/8.13.6) with ESMTP id q62CcmOK006883; Mon, 2 Jul 2012 14:38:48 +0200 From: Jan Kiszka To: "Michael S. Tsirkin" , qemu-devel Date: Mon, 2 Jul 2012 14:38:47 +0200 Message-Id: <0de594d38ac7479645bb71547665ebf64418c9ce.1341232709.git.jan.kiszka@siemens.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: References: In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-Received-From: 192.35.17.28 Cc: Alex Williamson Subject: [Qemu-devel] [PATCH v2 2/2] pci: Add INTx routing notifier X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This per-device notifier shall be triggered by any interrupt router along the path of a device's legacy interrupt signal on routing changes. For simplicity reasons and as this is a slow path anyway, no further details on the routing changes are provided. Instead, the callback is expected to use pci_device_route_intx_to_irq to check the effect of the change. Will be used by KVM PCI device assignment and VFIO. Signed-off-by: Jan Kiszka Acked-by: Alex Williamson --- hw/pci.c | 23 +++++++++++++++++++++++ hw/pci.h | 7 +++++++ hw/piix_pci.c | 2 ++ 3 files changed, 32 insertions(+), 0 deletions(-) diff --git a/hw/pci.c b/hw/pci.c index 311ba09..772141a 100644 --- a/hw/pci.c +++ b/hw/pci.c @@ -1095,6 +1095,29 @@ PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) return bus->route_intx_to_irq(bus->irq_opaque, pin); } +void pci_bus_fire_intx_routing_notifier(PCIBus *bus) +{ + PCIDevice *dev; + PCIBus *sec; + int i; + + for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { + dev = bus->devices[i]; + if (dev && dev->intx_routing_notifier) { + dev->intx_routing_notifier(dev); + } + QLIST_FOREACH(sec, &bus->child, sibling) { + pci_bus_fire_intx_routing_notifier(sec); + } + } +} + +void pci_device_set_intx_routing_notifier(PCIDevice *dev, + PCIINTxRoutingNotifier notifier) +{ + dev->intx_routing_notifier = notifier; +} + /***********************************************************/ /* monitor info on PCI */ diff --git a/hw/pci.h b/hw/pci.h index 387111b..c4382a1 100644 --- a/hw/pci.h +++ b/hw/pci.h @@ -182,6 +182,7 @@ typedef struct PCIDeviceClass { const char *romfile; } PCIDeviceClass; +typedef void (*PCIINTxRoutingNotifier)(PCIDevice *dev); typedef int (*MSIVectorUseNotifier)(PCIDevice *dev, unsigned int vector, MSIMessage msg); typedef void (*MSIVectorReleaseNotifier)(PCIDevice *dev, unsigned int vector); @@ -259,6 +260,9 @@ struct PCIDevice { MemoryRegion rom; uint32_t rom_bar; + /* INTx routing notifier */ + PCIINTxRoutingNotifier intx_routing_notifier; + /* MSI-X notifiers */ MSIVectorUseNotifier msix_vector_use_notifier; MSIVectorReleaseNotifier msix_vector_release_notifier; @@ -319,6 +323,9 @@ PCIBus *pci_register_bus(DeviceState *parent, const char *name, MemoryRegion *address_space_io, uint8_t devfn_min, int nirq); PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin); +void pci_bus_fire_intx_routing_notifier(PCIBus *bus); +void pci_device_set_intx_routing_notifier(PCIDevice *dev, + PCIINTxRoutingNotifier notifier); void pci_device_reset(PCIDevice *dev); void pci_bus_reset(PCIBus *bus); diff --git a/hw/piix_pci.c b/hw/piix_pci.c index 347177f..8fd21f3 100644 --- a/hw/piix_pci.c +++ b/hw/piix_pci.c @@ -422,6 +422,8 @@ static void piix3_write_config(PCIDevice *dev, if (ranges_overlap(address, len, PIIX_PIRQC, 4)) { PIIX3State *piix3 = DO_UPCAST(PIIX3State, dev, dev); int pic_irq; + + pci_bus_fire_intx_routing_notifier(piix3->dev.bus); piix3_update_irq_levels(piix3); for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) { piix3_set_irq_pic(piix3, pic_irq);