Commit 9acdc2af authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Catalin Marinas

arm64: drop sleep_idmap_phys and clean up cpu_resume()

Two cleanups of the asm function cpu_resume():
- The global variable sleep_idmap_phys always points to idmap_pg_dir,
  so we can just use that value directly in the CPU resume path.
- Unclutter the load of sleep_save_sp::save_ptr_stash_phys.
Acked-by: default avatarLorenzo Pieralisi <>
Tested-by: default avatarLorenzo Pieralisi <>
Signed-off-by: default avatarArd Biesheuvel <>
Signed-off-by: default avatarCatalin Marinas <>
parent 5dfe9d7d
......@@ -164,15 +164,12 @@ ENTRY(cpu_resume)
mov x7, xzr
adrp x0, sleep_save_sp
add x0, x0, #:lo12:sleep_save_sp
ldr x0, [x0, #SLEEP_SAVE_SP_PHYS]
ldr_l x0, sleep_save_sp + SLEEP_SAVE_SP_PHYS
ldr x0, [x0, x7, lsl #3]
/* load sp from context */
ldr x2, [x0, #CPU_CTX_SP]
adrp x1, sleep_idmap_phys
/* load physical address of identity map page table in x1 */
ldr x1, [x1, #:lo12:sleep_idmap_phys]
adrp x1, idmap_pg_dir
mov sp, x2
* cpu_do_resume expects x0 to contain context physical address
......@@ -118,7 +118,6 @@ int __cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
struct sleep_save_sp sleep_save_sp;
phys_addr_t sleep_idmap_phys;
static int __init cpu_suspend_init(void)
......@@ -132,9 +131,7 @@ static int __init cpu_suspend_init(void)
sleep_save_sp.save_ptr_stash = ctx_ptr;
sleep_save_sp.save_ptr_stash_phys = virt_to_phys(ctx_ptr);
sleep_idmap_phys = virt_to_phys(idmap_pg_dir);
__flush_dcache_area(&sleep_save_sp, sizeof(struct sleep_save_sp));
__flush_dcache_area(&sleep_idmap_phys, sizeof(sleep_idmap_phys));
return 0;
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