Commit be379124 authored by Khalid Aziz's avatar Khalid Aziz Committed by Tony Luck
Browse files

[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: default avatarKhalid Aziz <khalid.aziz@hp.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent d8c97d5f

arch/ia64/kernel/efi.c

+87 −0
Original line number Diff line number Diff line
@@ -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);

		}

	}

}

arch/ia64/kernel/setup.c

+29 −0
Original line number Diff line number Diff line
@@ -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

 *