From: Alexander Graf <ag...@suse.de>
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 <ag...@suse.de>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
Reviewed-by: Shannon Zhao <shannon.z...@linaro.org>
Message-id: 1486644810-33181-3-git-send-email-ag...@suse.de
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
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));
--
2.7.4
