From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38554) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duLd7-0005li-Rn for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:44:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duLd6-0002Wc-K0 for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:44:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:25506) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1duLd6-0002Vr-Eg for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:44:12 -0400 From: Cornelia Huck Date: Tue, 19 Sep 2017 18:43:04 +0200 Message-Id: <20170919164337.18555-6-cohuck@redhat.com> In-Reply-To: <20170919164337.18555-1-cohuck@redhat.com> References: <20170919164337.18555-1-cohuck@redhat.com> Subject: [Qemu-devel] [PULL v2 05/38] s390x/pci: add iommu replay callback List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: peter.maydell@linaro.org Cc: qemu-devel@nongnu.org, rth@twiddle.net, agraf@suse.de, thuth@redhat.com, borntraeger@de.ibm.com, david@redhat.com, Yi Min Zhao , Cornelia Huck From: Yi Min Zhao Let's introduce iommu replay callback for s390 pci iommu memory region. Currently we don't need any dma mapping replay. So let it return directly. This implementation will avoid meaningless loops calling translation callback. Reviewed-by: Pierre Morel Reviewed-by: Halil Pasic Signed-off-by: Yi Min Zhao Message-Id: <1504606380-49341-4-git-send-email-zyimin@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- hw/s390x/s390-pci-bus.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index bd8a3e1e1c..3b9965fde0 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -397,6 +397,17 @@ static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr, return ret; } +static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu, + IOMMUNotifier *notifier) +{ + /* It's impossible to plug a pci device on s390x that already has iommu + * mappings which need to be replayed, that is due to the "one iommu per + * zpci device" construct. But when we support migration of vfio-pci + * devices in future, we need to revisit this. + */ + return; +} + static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, int devfn) { @@ -1045,6 +1056,7 @@ static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); imrc->translate = s390_translate_iommu; + imrc->replay = s390_pci_iommu_replay; } static const TypeInfo s390_iommu_memory_region_info = { -- 2.13.5