diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-10-18 03:04:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:19 -0700 |
| commit | c30bb68c26ad7e9277f2d1dfed8347f329e1cf27 (patch) | |
| tree | 6609a9a69446f58d076dadd452b250db732be47b /arch/x86/kernel/suspend_64.c | |
| parent | d158cbdf39ffaec9dd5299fdfdfdd2c7897a71dc (diff) | |
Hibernation: Pass CR3 in the image header on x86_64
Since we already pass the address of restore_registers() in the image header,
we can also pass the value of the CR3 register from before the hibernation in
the same way. This will allow us to avoid using init_level4_pgt page tables
during the restore.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/suspend_64.c')
| -rw-r--r-- | arch/x86/kernel/suspend_64.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c index 01fbfb018ca..da10eef4c3e 100644 --- a/arch/x86/kernel/suspend_64.c +++ b/arch/x86/kernel/suspend_64.c @@ -156,6 +156,12 @@ extern int restore_image(void); */ unsigned long restore_jump_address; +/* + * Value of the cr3 register from before the hibernation (this value is passed + * in the image header). + */ +unsigned long restore_cr3; + pgd_t *temp_level4_pgt; void *relocated_restore_code; @@ -254,7 +260,8 @@ int pfn_is_nosave(unsigned long pfn) struct restore_data_record { unsigned long jump_address; - unsigned long control; + unsigned long cr3; + unsigned long magic; }; #define RESTORE_MAGIC 0x0123456789ABCDEFUL @@ -271,7 +278,8 @@ int arch_hibernation_header_save(void *addr, unsigned int max_size) if (max_size < sizeof(struct restore_data_record)) return -EOVERFLOW; rdr->jump_address = restore_jump_address; - rdr->control = (restore_jump_address ^ RESTORE_MAGIC); + rdr->cr3 = restore_cr3; + rdr->magic = RESTORE_MAGIC; return 0; } @@ -285,7 +293,7 @@ int arch_hibernation_header_restore(void *addr) struct restore_data_record *rdr = addr; restore_jump_address = rdr->jump_address; - return (rdr->control == (restore_jump_address ^ RESTORE_MAGIC)) ? - 0 : -EINVAL; + restore_cr3 = rdr->cr3; + return (rdr->magic == RESTORE_MAGIC) ? 0 : -EINVAL; } #endif /* CONFIG_HIBERNATION */ |