Add the BSS to the resource tree just as kernel text and kernel data are in
the resource tree. The main reason behind this is to avoid crashkernel
reservation in that area.
While it's not strictly necessary to have the BSS in the resource tree (the
actual collision detection is done in the reserve_bootmem() function before),
the usage of the BSS resource should be presented to the user in /proc/iomem
just as Kernel data and Kernel code.
Note: The patch currently is only implemented for x86 and ia64 (because
efi_initialize_iomem_resources() has the same signature on i386 and ia64).
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
void
efi_initialize_iomem_resources(struct resource *code_resource,
void
efi_initialize_iomem_resources(struct resource *code_resource,
- struct resource *data_resource)
+ struct resource *data_resource,
+ struct resource *bss_resource)
{
struct resource *res;
void *efi_map_start, *efi_map_end, *p;
{
struct resource *res;
void *efi_map_start, *efi_map_end, *p;
*/
insert_resource(res, code_resource);
insert_resource(res, data_resource);
*/
insert_resource(res, code_resource);
insert_resource(res, data_resource);
+ insert_resource(res, bss_resource);
#ifdef CONFIG_KEXEC
insert_resource(res, &efi_memmap_res);
insert_resource(res, &boot_param_res);
#ifdef CONFIG_KEXEC
insert_resource(res, &efi_memmap_res);
insert_resource(res, &boot_param_res);
.name = "Kernel code",
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
.name = "Kernel code",
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
-extern char _text[], _end[], _etext[];
+
+static struct resource bss_resource = {
+ .name = "Kernel bss",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+extern char _text[], _end[], _etext[], _edata[], _bss[];
unsigned long ia64_max_cacheline_size;
unsigned long ia64_max_cacheline_size;
code_resource.start = ia64_tpa(_text);
code_resource.end = ia64_tpa(_etext) - 1;
data_resource.start = ia64_tpa(_etext);
code_resource.start = ia64_tpa(_text);
code_resource.end = ia64_tpa(_etext) - 1;
data_resource.start = ia64_tpa(_etext);
- data_resource.end = ia64_tpa(_end) - 1;
- efi_initialize_iomem_resources(&code_resource, &data_resource);
+ data_resource.end = ia64_tpa(_edata) - 1;
+ bss_resource.start = ia64_tpa(_bss);
+ bss_resource.end = ia64_tpa(_end) - 1;
+ efi_initialize_iomem_resources(&code_resource, &data_resource,
+ &bss_resource);
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
+struct resource bss_resource = {
+ .name = "Kernel bss",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
static struct resource system_rom_resource = {
.name = "System ROM",
.start = 0xf0000,
static struct resource system_rom_resource = {
.name = "System ROM",
.start = 0xf0000,
* and also for regions reported as reserved by the e820.
*/
static void __init
* and also for regions reported as reserved by the e820.
*/
static void __init
-legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
+legacy_init_iomem_resources(struct resource *code_resource,
+ struct resource *data_resource,
+ struct resource *bss_resource)
*/
request_resource(res, code_resource);
request_resource(res, data_resource);
*/
request_resource(res, code_resource);
request_resource(res, data_resource);
+ request_resource(res, bss_resource);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
printk("Setting up standard PCI resources\n");
if (efi_enabled)
printk("Setting up standard PCI resources\n");
if (efi_enabled)
- efi_initialize_iomem_resources(&code_resource, &data_resource);
+ efi_initialize_iomem_resources(&code_resource,
+ &data_resource, &bss_resource);
- legacy_init_iomem_resources(&code_resource, &data_resource);
+ legacy_init_iomem_resources(&code_resource,
+ &data_resource, &bss_resource);
/* EFI systems may still have VGA */
request_resource(&iomem_resource, &video_ram_resource);
/* EFI systems may still have VGA */
request_resource(&iomem_resource, &video_ram_resource);
*/
static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
*/
static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
-extern struct resource code_resource, data_resource;
+extern struct resource code_resource, data_resource, bss_resource;
/* Check for some hardcoded bad areas that early boot is not allowed to touch */
static inline int bad_addr(unsigned long *addrp, unsigned long size)
/* Check for some hardcoded bad areas that early boot is not allowed to touch */
static inline int bad_addr(unsigned long *addrp, unsigned long size)
*/
request_resource(res, &code_resource);
request_resource(res, &data_resource);
*/
request_resource(res, &code_resource);
request_resource(res, &data_resource);
+ request_resource(res, &bss_resource);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
void __init
efi_initialize_iomem_resources(struct resource *code_resource,
void __init
efi_initialize_iomem_resources(struct resource *code_resource,
- struct resource *data_resource)
+ struct resource *data_resource,
+ struct resource *bss_resource)
{
struct resource *res;
efi_memory_desc_t *md;
{
struct resource *res;
efi_memory_desc_t *md;
if (md->type == EFI_CONVENTIONAL_MEMORY) {
request_resource(res, code_resource);
request_resource(res, data_resource);
if (md->type == EFI_CONVENTIONAL_MEMORY) {
request_resource(res, code_resource);
request_resource(res, data_resource);
+ request_resource(res, bss_resource);
#ifdef CONFIG_KEXEC
request_resource(res, &crashk_res);
#endif
#ifdef CONFIG_KEXEC
request_resource(res, &crashk_res);
#endif
#include <asm/vmi.h>
#include <setup_arch.h>
#include <bios_ebda.h>
#include <asm/vmi.h>
#include <setup_arch.h>
#include <bios_ebda.h>
+#include <asm/cacheflush.h>
/* This value is set up by the early boot code to point to the value
immediately after the boot time page tables. It contains a *physical*
/* This value is set up by the early boot code to point to the value
immediately after the boot time page tables. It contains a *physical*
*/
extern struct resource code_resource;
extern struct resource data_resource;
*/
extern struct resource code_resource;
extern struct resource data_resource;
+extern struct resource bss_resource;
/* cpu data as detected by the assembly code in head.S */
struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
/* cpu data as detected by the assembly code in head.S */
struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
code_resource.end = virt_to_phys(_etext)-1;
data_resource.start = virt_to_phys(_etext);
data_resource.end = virt_to_phys(_edata)-1;
code_resource.end = virt_to_phys(_etext)-1;
data_resource.start = virt_to_phys(_etext);
data_resource.end = virt_to_phys(_edata)-1;
+ bss_resource.start = virt_to_phys(&__bss_start);
+ bss_resource.end = virt_to_phys(&__bss_stop)-1;
#include <asm/numa.h>
#include <asm/sections.h>
#include <asm/dmi.h>
#include <asm/numa.h>
#include <asm/sections.h>
#include <asm/dmi.h>
+#include <asm/cacheflush.h>
.end = 0,
.flags = IORESOURCE_RAM,
};
.end = 0,
.flags = IORESOURCE_RAM,
};
+struct resource bss_resource = {
+ .name = "Kernel bss",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_RAM,
+};
#ifdef CONFIG_PROC_VMCORE
/* elfcorehdr= specifies the location of elf core header
#ifdef CONFIG_PROC_VMCORE
/* elfcorehdr= specifies the location of elf core header
code_resource.end = virt_to_phys(&_etext)-1;
data_resource.start = virt_to_phys(&_etext);
data_resource.end = virt_to_phys(&_edata)-1;
code_resource.end = virt_to_phys(&_etext)-1;
data_resource.start = virt_to_phys(&_etext);
data_resource.end = virt_to_phys(&_edata)-1;
+ bss_resource.start = virt_to_phys(&__bss_start);
+ bss_resource.end = virt_to_phys(&__bss_stop)-1;
early_identify_cpu(&boot_cpu_data);
early_identify_cpu(&boot_cpu_data);
u64 attr);
extern int __init efi_uart_console_only (void);
extern void efi_initialize_iomem_resources(struct resource *code_resource,
u64 attr);
extern int __init efi_uart_console_only (void);
extern void efi_initialize_iomem_resources(struct resource *code_resource,
- struct resource *data_resource);
+ struct resource *data_resource, struct resource *bss_resource);
extern unsigned long efi_get_time(void);
extern int efi_set_rtc_mmss(unsigned long nowtime);
extern int is_available_memory(efi_memory_desc_t * md);
extern unsigned long efi_get_time(void);
extern int efi_set_rtc_mmss(unsigned long nowtime);
extern int is_available_memory(efi_memory_desc_t * md);