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authorAlexander Graf <agraf@suse.de>2017-02-10 17:40:29 +0000
committerPeter Maydell <peter.maydell@linaro.org>2017-02-10 17:40:29 +0000
commit76266d9913961922415ce46b628e4ad706a1ef08 (patch)
tree41f126e8434c7e1da39e7bc0a39fc253e24fad9d
parent054bb7b215d621d7b3bba16f40bf3291ef4f430b (diff)
downloadqemu-arm-76266d9913961922415ce46b628e4ad706a1ef08.tar.gz
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 <agraf@suse.de> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org> Message-id: 1486644810-33181-3-git-send-email-agraf@suse.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/arm/virt-acpi-build.c1
1 files changed, 1 insertions, 0 deletions
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));