Add a fw_cfg device node to the ACPI DSDT. This is mostly
informational, as the authoritative fw_cfg MMIO region(s)
are listed in the Device Tree. However, since we are building
ACPI tables, we might as well be thorough while at it...
Signed-off-by: Gabriel Somlo <somlo@xxxxxxx>
Reviewed-by: Laszlo Ersek <lersek@xxxxxxxxxx>
Tested-by: Laszlo Ersek <lersek@xxxxxxxxxx>
Reviewed-by: Marc Marí <markmb@xxxxxxxxxx>
---
hw/arm/virt-acpi-build.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 87fbe7c..20bbdf2 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -95,6 +95,20 @@ static void acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
aml_append(scope, dev);
}
+static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry *fw_cfg_memmap)
+{
+ Aml *dev = aml_device("FWCF");
+ aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
+ /* device present, functioning, decoding, not shown in UI */
+ aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
+
+ Aml *crs = aml_resource_template();
+ aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
+ fw_cfg_memmap->size, AML_READ_WRITE));
+ aml_append(dev, aml_name_decl("_CRS", crs));
+ aml_append(scope, dev);
+}
+
static void acpi_dsdt_add_flash(Aml *scope, const MemMapEntry *flash_memmap)
{
Aml *dev, *crs;
@@ -565,6 +579,7 @@ build_dsdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
acpi_dsdt_add_uart(scope, &memmap[VIRT_UART],
(irqmap[VIRT_UART] + ARM_SPI_BASE));
acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
+ acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
(irqmap[VIRT_MMIO] + ARM_SPI_BASE), NUM_VIRTIO_TRANSPORTS);
acpi_dsdt_add_pci(scope, memmap, (irqmap[VIRT_PCIE] + ARM_SPI_BASE),
--
2.4.3
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