From 76266d9913961922415ce46b628e4ad706a1ef08 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Fri, 10 Feb 2017 17:40:29 +0000 Subject: [PATCH] hw/arm/virt: Declare virtio-mmio as dma cache coherent in ACPI 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 Reviewed-by: Laszlo Ersek Reviewed-by: Ard Biesheuvel Reviewed-by: Shannon Zhao Message-id: 1486644810-33181-3-git-send-email-agraf@suse.de Signed-off-by: Peter Maydell --- 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 07a10aca40..8955a9d384 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)); -- 2.39.2