From: Graeme Gregory Date: Tue, 3 Nov 2015 13:49:42 +0000 (+0000) Subject: hw/arm/virt-acpi-build: _CCA attribute is compulsory X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bc64b96c984abfe84f43562ca7480bb4f2af0613;p=qemu.git hw/arm/virt-acpi-build: _CCA attribute is compulsory According to ACPI specification 6.2.17 _CCA (Cache Coherency Attribute) this attribute is compulsory on ARM systems. Add this attribute to the PCI host bridges as required. Without this the kernel will produce the error [Firmware Bug]: PCI device 0000:00:00.0 fail to setup DMA. Signed-off-by: Graeme Gregory Message-id: 1446460786-13663-1-git-send-email-graeme.gregory@linaro.org Reviewed-by: Shannon Zhao Signed-off-by: Peter Maydell --- diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 1aaff1f662..1430125885 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -180,6 +180,7 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap, int irq, aml_append(dev, aml_name_decl("_ADR", aml_int(0))); aml_append(dev, aml_name_decl("_UID", aml_string("PCI0"))); aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device"))); + aml_append(dev, aml_name_decl("_CCA", aml_int(1))); /* Declare the PCI Routing Table. */ Aml *rt_pkg = aml_package(nr_pcie_buses * PCI_NUM_PINS);