From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59188) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cboDy-0002be-Su for qemu-devel@nongnu.org; Thu, 09 Feb 2017 07:53:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cboDy-0007Q8-9d for qemu-devel@nongnu.org; Thu, 09 Feb 2017 07:53:22 -0500 From: Alexander Graf Date: Thu, 9 Feb 2017 13:53:28 +0100 Message-Id: <1486644810-33181-3-git-send-email-agraf@suse.de> In-Reply-To: <1486644810-33181-1-git-send-email-agraf@suse.de> References: <1486644810-33181-1-git-send-email-agraf@suse.de> Subject: [Qemu-devel] [PATCH v2 2/4] hw/arm/virt: Declare virtio-mmio as dma cache coherent in ACPI List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, mst@redhat.com, Laszlo Ersek , Shannon Zhao , Ard Biesheuvel Virtio-mmio devices can directly access guest memory and do so in cache coherent fashion. Tell the guest about that fact when it's using ACPI. Signed-off-by: Alexander Graf --- hw/arm/virt-acpi-build.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 07a10ac..8955a9d 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -135,6 +135,7 @@ static void acpi_dsdt_add_virtio(Aml *scope, Aml *dev = aml_device("VR%02u", i); aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); aml_append(dev, aml_name_decl("_UID", aml_int(i))); + aml_append(dev, aml_name_decl("_CCA", aml_int(1))); Aml *crs = aml_resource_template(); aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); -- 2.10.0