root/arch/arm64/kernel/entry-fpsimd.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * FP/SIMD state saving and restoring
   4  *
   5  * Copyright (C) 2012 ARM Ltd.
   6  * Author: Catalin Marinas <catalin.marinas@arm.com>
   7  */
   8 
   9 #include <linux/linkage.h>
  10 
  11 #include <asm/assembler.h>
  12 #include <asm/fpsimdmacros.h>
  13 
  14 /*
  15  * Save the FP registers.
  16  *
  17  * x0 - pointer to struct fpsimd_state
  18  */
  19 ENTRY(fpsimd_save_state)
  20         fpsimd_save x0, 8
  21         ret
  22 ENDPROC(fpsimd_save_state)
  23 
  24 /*
  25  * Load the FP registers.
  26  *
  27  * x0 - pointer to struct fpsimd_state
  28  */
  29 ENTRY(fpsimd_load_state)
  30         fpsimd_restore x0, 8
  31         ret
  32 ENDPROC(fpsimd_load_state)
  33 
  34 #ifdef CONFIG_ARM64_SVE
  35 ENTRY(sve_save_state)
  36         sve_save 0, x1, 2
  37         ret
  38 ENDPROC(sve_save_state)
  39 
  40 ENTRY(sve_load_state)
  41         sve_load 0, x1, x2, 3, x4
  42         ret
  43 ENDPROC(sve_load_state)
  44 
  45 ENTRY(sve_get_vl)
  46         _sve_rdvl       0, 1
  47         ret
  48 ENDPROC(sve_get_vl)
  49 #endif /* CONFIG_ARM64_SVE */