From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:49251) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ggvGE-0003yd-Lc for qemu-devel@nongnu.org; Tue, 08 Jan 2019 12:33:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ggvGA-0006WI-S9 for qemu-devel@nongnu.org; Tue, 08 Jan 2019 12:33:54 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:39424) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ggvGA-0006R9-HM for qemu-devel@nongnu.org; Tue, 08 Jan 2019 12:33:50 -0500 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id x08HPJWa050095 for ; Tue, 8 Jan 2019 12:33:47 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2pvx80f4j4-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 08 Jan 2019 12:33:47 -0500 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 8 Jan 2019 17:33:45 -0000 From: Pierre Morel Date: Tue, 8 Jan 2019 18:33:39 +0100 Message-Id: <1546968819-8166-1-git-send-email-pmorel@linux.ibm.com> Subject: [Qemu-devel] [PATCH] s390x/pci: Set the iommu region size as guest wants List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: walling@linux.ibm.com Cc: borntraeger@de.ibm.com, cohuck@redhat.com, rth@twiddle.net, david@redhat.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org, pasic@linux.ibm.com, thuth@redhat.com The size of the accessible iommu memory region in the guest is calculated by the gues as: (PCI Address Limit) - (PCI Base Address) + 1. Let's use this value to limit the IOMMU region size. Signed-off-by: Pierre Morel --- hw/s390x/s390-pci-bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 69e0671..e97696a 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -660,7 +660,7 @@ void s390_pci_iommu_enable(S390PCIIOMMU *iommu) char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr), TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr), - name, iommu->pal + 1); + name, iommu->pal - iommu->pba + 1); iommu->enabled = true; memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr)); g_free(name); -- 2.7.4