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[Qemu-devel] [PATCH] hw/arm/virt-acpi-build: _CCA attribute is compulsar
From: |
Graeme Gregory |
Subject: |
[Qemu-devel] [PATCH] hw/arm/virt-acpi-build: _CCA attribute is compulsary |
Date: |
Mon, 2 Nov 2015 10:39:46 +0000 |
According to ACPI specification 6.2.17 _CCA (Cache Coherency Attribute)
this attribute is compulsary 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 <address@hidden>
---
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 1aaff1f..1430125 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);
--
2.4.3
- [Qemu-devel] [PATCH] hw/arm/virt-acpi-build: _CCA attribute is compulsary,
Graeme Gregory <=