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Fri, 22 Nov 2019 18:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574447508; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=B76/q/QIgTbwaStE7V12zNd/AKuPjF8S7ms1RzIMaeM=; b=MCZQe0VPv76ufCszZYkGiRAFJmxdF+daNnLLeCifnPssblKWNhEitmFUsR8NFtAmF32CYG 2fHNOlTosCcbb8IuOjnnxUKDfJ6lglt2skbU8sZ8/WagxkO9dJe3w6Ws2wgbhTverQEqOO S4z2OvC3+erF4BXIqOja7bbO9OAwrFQ= From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, mst@redhat.com, armbru@redhat.com, jean-philippe.brucker@arm.com, bharatb.linux@gmail.com, yang.zhong@intel.com, dgilbert@redhat.com, quintela@redhat.com Subject: [PATCH for-5.0 v11 14/20] virtio-iommu: Handle reserved regions in the translation process Date: Fri, 22 Nov 2019 19:29:37 +0100 Message-Id: <20191122182943.4656-15-eric.auger@redhat.com> In-Reply-To: <20191122182943.4656-1-eric.auger@redhat.com> References: <20191122182943.4656-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: wxLWuDKoNRWCfV2kziUo7w-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kevin.tian@intel.com, peterx@redhat.com, tnowicki@marvell.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" When translating an address we need to check if it belongs to a reserved virtual address range. If it does, there are 2 cases: - it belongs to a RESERVED region: the guest should neither use this address in a MAP not instruct the end-point to DMA on them. We report an error - It belongs to an MSI region: we bypass the translation. Signed-off-by: Eric Auger --- v10 -> v11: - directly use the reserved_regions properties array v9 -> v10: - in case of MSI region, we immediatly return --- hw/virtio/virtio-iommu.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 1ce2218935..c5b202fab7 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -548,6 +548,7 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemory= Region *mr, hwaddr addr, uint32_t sid, flags; bool bypass_allowed; bool found; + int i; =20 interval.low =3D addr; interval.high =3D addr + 1; @@ -580,6 +581,22 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemor= yRegion *mr, hwaddr addr, goto unlock; } =20 + for (i =3D 0; i < s->nb_reserved_regions; i++) { + if (interval.low >=3D s->reserved_regions[i].low && + interval.low <=3D s->reserved_regions[i].high) { + switch (s->reserved_regions[i].type) { + case VIRTIO_IOMMU_RESV_MEM_T_MSI: + entry.perm =3D flag; + goto unlock; + case VIRTIO_IOMMU_RESV_MEM_T_RESERVED: + default: + virtio_iommu_report_fault(s, VIRTIO_IOMMU_FAULT_R_MAPPING, + 0, sid, addr); + goto unlock; + } + } + } + if (!ep->domain) { if (!bypass_allowed) { qemu_log_mask(LOG_GUEST_ERROR, --=20 2.20.1