Commit bc64b96c authored by Graeme Gregory's avatar Graeme Gregory Committed by Peter Maydell
Browse files

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: default avatarGraeme Gregory <graeme.gregory@linaro.org>
Message-id: 1446460786-13663-1-git-send-email-graeme.gregory@linaro.org
Reviewed-by: default avatarShannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 06e5cf7a

hw/arm/virt-acpi-build.c

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