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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 <graeme.gregory@linaro.org>
Message-id: 1446460786-13663-1-git-send-email-graeme.gregory@linaro.org
Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Graeme Gregory 2015-11-03 13:49:42 +00:00 committed by Peter Maydell
parent 06e5cf7acd
commit bc64b96c98
1 changed files with 1 additions and 0 deletions
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1
hw/arm/virt-acpi-build.c
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@ -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);