acpi/gpex: Fix cca attribute check for pxb device

When check DMA support for device attached to pxb,
the cache coherency attribute need to be set.
This add _CCA attribute for pxb DSDT.

Fixes: 6f9765fbad ("acpi/gpex: Build tables for pxb")
Signed-off-by: Jiahui Cen <cenjiahui@huawei.com>
Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Message-Id: <1612490205-48788-3-git-send-email-wangxingang5@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
index 446912d771eb61586c64f2d1b9505fb90f1c929e..0f01f13a6edd555f9811ef01c270866d716fada3 100644 (file)
--- a/hw/pci-host/gpex-acpi.c
+++ b/hw/pci-host/gpex-acpi.c
@@ -175,6 +175,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
             aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
             aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
             aml_append(dev, aml_name_decl("_STR", aml_unicode("pxb Device")));
+            aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
             if (numa_node != NUMA_NODE_UNASSIGNED) {
                 aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
             }