Commit 76266d99 authored by Alexander Graf's avatar Alexander Graf Committed by Peter Maydell
Browse files

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: default avatarAlexander Graf <agraf@suse.de>
Reviewed-by: default avatarLaszlo Ersek <lersek@redhat.com>
Reviewed-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: default avatarShannon Zhao <shannon.zhao@linaro.org>
Message-id: 1486644810-33181-3-git-send-email-agraf@suse.de
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 054bb7b2

hw/arm/virt-acpi-build.c

+1 −0
Original line number Diff line number Diff line
@@ -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));