[IA64] include EFI memory information in /proc/iomem

User mode kexec tools expect to find information about physical
memory in /proc/iomem (as they do on x86) to validate the addresses
that the new kernel will use.

Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 116 insertions, 0 deletions

diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 1291db581721..f72ea6aebcb1 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -923,3 +923,90 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
 	*s = (u64)kern_memmap;
 	*e = (u64)++k;
 }
+
+void
+efi_initialize_iomem_resources(struct resource *code_resource,
+			       struct resource *data_resource)
+{
+	struct resource *res;
+	void *efi_map_start, *efi_map_end, *p;
+	efi_memory_desc_t *md;
+	u64 efi_desc_size;
+	char *name;
+	unsigned long flags;
+
+	efi_map_start = __va(ia64_boot_param->efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+	efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+	res = NULL;
+
+	for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+		md = p;
+
+		if (md->num_pages == 0) /* should not happen */
+			continue;
+
+		flags = IORESOURCE_MEM;
+		switch (md->type) {
+
+			case EFI_MEMORY_MAPPED_IO:
+			case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+				continue;
+
+			case EFI_LOADER_CODE:
+			case EFI_LOADER_DATA:
+			case EFI_BOOT_SERVICES_DATA:
+			case EFI_BOOT_SERVICES_CODE:
+			case EFI_CONVENTIONAL_MEMORY:
+				if (md->attribute & EFI_MEMORY_WP) {
+					name = "System ROM";
+					flags |= IORESOURCE_READONLY;
+				} else {
+					name = "System RAM";
+				}
+				break;
+
+			case EFI_ACPI_MEMORY_NVS:
+				name = "ACPI Non-volatile Storage";
+				flags |= IORESOURCE_BUSY;
+				break;
+
+			case EFI_UNUSABLE_MEMORY:
+				name = "reserved";
+				flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
+				break;
+
+			case EFI_RESERVED_TYPE:
+			case EFI_RUNTIME_SERVICES_CODE:
+			case EFI_RUNTIME_SERVICES_DATA:
+			case EFI_ACPI_RECLAIM_MEMORY:
+			default:
+				name = "reserved";
+				flags |= IORESOURCE_BUSY;
+				break;
+		}
+
+		if ((res = kcalloc(1, sizeof(struct resource), GFP_KERNEL)) == NULL) {
+			printk(KERN_ERR "failed to alocate resource for iomem\n");
+			return;
+		}
+
+		res->name = name;
+		res->start = md->phys_addr;
+		res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
+		res->flags = flags;
+
+		if (insert_resource(&iomem_resource, res) < 0)
+			kfree(res);
+		else {
+			/*
+			 * We don't know which region contains
+			 * kernel data so we try it repeatedly and
+			 * let the resource manager test it.
+			 */
+			insert_resource(res, code_resource);
+			insert_resource(res, data_resource);
+		}
+	}
+}
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 1658d687b79c..83b37c410ccd 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -78,6 +78,19 @@ struct screen_info screen_info;
 unsigned long vga_console_iobase;
 unsigned long vga_console_membase;
 
+static struct resource data_resource = {
+	.name	= "Kernel data",
+	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource code_resource = {
+	.name	= "Kernel code",
+	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM
+};
+extern void efi_initialize_iomem_resources(struct resource *,
+		struct resource *);
+extern char _text[], _edata[], _etext[];
+
 unsigned long ia64_max_cacheline_size;
 unsigned long ia64_iobase;	/* virtual address for I/O accesses */
 EXPORT_SYMBOL(ia64_iobase);
@@ -171,6 +184,22 @@ sort_regions (struct rsvd_region *rsvd_region, int max)
 	}
 }
 
+/*
+ * Request address space for all standard resources
+ */
+static int __init register_memory(void)
+{
+	code_resource.start = ia64_tpa(_text);
+	code_resource.end   = ia64_tpa(_etext) - 1;
+	data_resource.start = ia64_tpa(_etext);
+	data_resource.end   = ia64_tpa(_edata) - 1;
+	efi_initialize_iomem_resources(&code_resource, &data_resource);
+
+	return 0;
+}
+
+__initcall(register_memory);
+
 /**
  * reserve_memory - setup reserved memory areas
  *