From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59194) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cboDz-0002bg-4t for qemu-devel@nongnu.org; Thu, 09 Feb 2017 07:53:24 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cboDy-0007QN-Cv for qemu-devel@nongnu.org; Thu, 09 Feb 2017 07:53:23 -0500 From: Alexander Graf Date: Thu, 9 Feb 2017 13:53:29 +0100 Message-Id: <1486644810-33181-4-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 3/4] hw/arm/virt: Declare fwcfg 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 Fw-cfg recently learned how to directly access guest memory and does 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 8955a9d..0835e59 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -90,6 +90,7 @@ static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry *fw_cfg_memmap) aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002"))); /* device present, functioning, decoding, not shown in UI */ aml_append(dev, aml_name_decl("_STA", aml_int(0xB))); + aml_append(dev, aml_name_decl("_CCA", aml_int(1))); Aml *crs = aml_resource_template(); aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base, -- 2.10.0