xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

efi: Export EFI runtime memory mapping to sysfs

Browse Source 
kexec kernel will need exactly same mapping for EFI runtime memory
ranges. Thus here export the runtime ranges mapping to sysfs,
kexec-tools will assemble them and pass to 2nd kernel via setup_data.

Introducing a new directory /sys/firmware/efi/runtime-map just like
/sys/firmware/memmap. Containing below attribute in each file of that
directory:

attribute  num_pages  phys_addr  type  virt_addr

Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Dave Young
2013-12-20 18:02:18 +08:00
committed by Matt Fleming
parent a0998eb15a
commit 926172d460
7 changed files with 287 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/linux/efi.h
View File

@@ -872,4 +872,17 @@ int efivars_sysfs_init(void);
#endif /* CONFIG_EFI_VARS */
#ifdef CONFIG_EFI_RUNTIME_MAP
int efi_runtime_map_init(struct kobject *);
void efi_runtime_map_setup(void *, int, u32);
#else
static inline int efi_runtime_map_init(struct kobject *kobj)
{
return 0;
}
static inline void
efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
#endif
#endif /* _LINUX_EFI_H */