[PATCH v2] xen/include: introduce resource.h

[dmkhn@xxxxxxxxx]

From: Denis Mukhin <dmukhin@xxxxxxxx>

Move resource definitions to a new architecture-agnostic shared header file.

Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
Changes in v2:
- Formatting fixes
- Link to v1: 
https://lore.kernel.org/xen-devel/20250207231814.3863449-1-dmukhin@xxxxxxxx/
---
 xen/common/device-tree/device-tree.c | 21 +----------------
 xen/drivers/passthrough/arm/smmu.c   | 18 +++------------
 xen/include/xen/resource.h           | 34 ++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 35 deletions(-)
 create mode 100644 xen/include/xen/resource.h

diff --git a/xen/common/device-tree/device-tree.c 
b/xen/common/device-tree/device-tree.c
index d0528c5825..e8f810b2fe 100644
--- a/xen/common/device-tree/device-tree.c
+++ b/xen/common/device-tree/device-tree.c
@@ -24,6 +24,7 @@
 #include <xen/ctype.h>
 #include <asm/setup.h>
 #include <xen/err.h>
+#include <xen/resource.h>
 
 const void *device_tree_flattened;
 dt_irq_xlate_func dt_irq_xlate;
@@ -535,26 +536,6 @@ int dt_child_n_size_cells(const struct dt_device_node 
*parent)
     return __dt_n_size_cells(parent, true);
 }
 
-/*
- * These are defined in Linux where much of this code comes from, but
- * are currently unused outside this file in the context of Xen.
- */
-#define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
-
-#define IORESOURCE_TYPE_BITS    0x00001f00      /* Resource type */
-#define IORESOURCE_IO           0x00000100      /* PCI/ISA I/O ports */
-#define IORESOURCE_MEM          0x00000200
-#define IORESOURCE_REG          0x00000300      /* Register offsets */
-#define IORESOURCE_IRQ          0x00000400
-#define IORESOURCE_DMA          0x00000800
-#define IORESOURCE_BUS          0x00001000
-
-#define IORESOURCE_PREFETCH     0x00002000      /* No side effects */
-#define IORESOURCE_READONLY     0x00004000
-#define IORESOURCE_CACHEABLE    0x00008000
-#define IORESOURCE_RANGELENGTH  0x00010000
-#define IORESOURCE_SHADOWABLE   0x00020000
-
 /*
  * Default translator (generic bus)
  */
diff --git a/xen/drivers/passthrough/arm/smmu.c 
b/xen/drivers/passthrough/arm/smmu.c
index 03d22bce1e..0f8d47dc98 100644
--- a/xen/drivers/passthrough/arm/smmu.c
+++ b/xen/drivers/passthrough/arm/smmu.c
@@ -50,6 +50,7 @@
 #include <xen/rbtree.h>
 #include <xen/sched.h>
 #include <xen/sizes.h>
+#include <xen/resource.h>
 #include <asm/atomic.h>
 #include <asm/device.h>
 #include <asm/io.h>
@@ -64,6 +65,8 @@
 
 /* Alias to Xen device tree helpers */
 #define device_node dt_device_node
+#define platform_device dt_device_node
+
 #define of_phandle_args dt_phandle_args
 #define of_device_id dt_device_match
 #define of_match_node dt_match_node
@@ -71,21 +74,6 @@
 #define of_property_read_bool dt_property_read_bool
 #define of_parse_phandle_with_args dt_parse_phandle_with_args
 
-/* Xen: Helpers to get device MMIO and IRQs */
-struct resource
-{
-       paddr_t addr;
-       paddr_t size;
-       unsigned int type;
-};
-
-#define resource_size(res) (res)->size;
-
-#define platform_device dt_device_node
-
-#define IORESOURCE_MEM 0
-#define IORESOURCE_IRQ 1
-
 static struct resource *platform_get_resource(struct platform_device *pdev,
                                              unsigned int type,
                                              unsigned int num)
diff --git a/xen/include/xen/resource.h b/xen/include/xen/resource.h
new file mode 100644
index 0000000000..5d10363128
--- /dev/null
+++ b/xen/include/xen/resource.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * System resource description.
+ */
+#ifndef XEN__RESOURCE_H
+#define XEN__RESOURCE_H
+
+#define IORESOURCE_BITS         0x000000FFU      /* Bus-specific bits */
+
+#define IORESOURCE_TYPE_BITS    0x00001F00U      /* Resource type */
+#define IORESOURCE_IO           0x00000100U      /* PCI/ISA I/O ports */
+#define IORESOURCE_MEM          0x00000200U
+#define IORESOURCE_REG          0x00000300U      /* Register offsets */
+#define IORESOURCE_IRQ          0x00000400U
+#define IORESOURCE_DMA          0x00000800U
+#define IORESOURCE_BUS          0x00001000U
+
+#define IORESOURCE_PREFETCH     0x00002000U      /* No side effects */
+#define IORESOURCE_READONLY     0x00004000U
+#define IORESOURCE_CACHEABLE    0x00008000U
+#define IORESOURCE_RANGELENGTH  0x00010000U
+#define IORESOURCE_SHADOWABLE   0x00020000U
+
+#define IORESOURCE_UNKNOWN      (~0U)
+
+struct resource {
+    paddr_t addr;
+    paddr_t size;
+    unsigned int type;
+};
+
+#define resource_size(res)      ((res)->size)
+
+#endif /* XEN__RESOURCE_H */
-- 
2.34.1