[RFC 02/13] ACPI: Add VIOT definitions

[Jean-Philippe Brucker <jean-philippe@linaro.org>]

This is temporary, until the VIOT table is published and these
definitions added to ACPICA.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 include/acpi/actbl2.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index e45ced27f4c3..99c1d747e9d8 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -25,6 +25,7 @@
  * the wrong signature.
  */
 #define ACPI_SIG_IORT           "IORT"	/* IO Remapping Table */
+#define ACPI_SIG_VIOT           "VIOT"	/* Virtual I/O Table */
 #define ACPI_SIG_IVRS           "IVRS"	/* I/O Virtualization Reporting Structure */
 #define ACPI_SIG_LPIT           "LPIT"	/* Low Power Idle Table */
 #define ACPI_SIG_MADT           "APIC"	/* Multiple APIC Description Table */
@@ -412,6 +413,36 @@ struct acpi_ivrs_memory {
 	u64 memory_length;
 };
 
+/*******************************************************************************
+ *
+ * VIOT - Virtual I/O Table
+ *        Version 1
+ *
+ ******************************************************************************/
+
+struct acpi_table_viot {
+	struct acpi_table_header header;
+	u8 reserved[12];
+	struct acpi_table_header base_table;
+};
+
+#define ACPI_VIOT_IORT_NODE_VIRTIO_PCI_IOMMU    0x80
+#define ACPI_VIOT_IORT_NODE_VIRTIO_MMIO_IOMMU   0x81
+
+struct acpi_viot_iort_virtio_pci_iommu {
+	u32 devid;
+};
+
+struct acpi_viot_iort_virtio_mmio_iommu {
+	u64 base_address;
+	u64 span;
+	u64 flags;
+	u64 interrupt;
+};
+
+/* FIXME: rename this monstrosity. */
+#define ACPI_VIOT_IORT_VIRTIO_MMIO_IOMMU_CACHE_COHERENT (1<<0)
+
 /*******************************************************************************
  *
  * LPIT - Low Power Idle Table
-- 
2.24.0