[PATCH 3.2 01/92] powerpc: Add vr save/restore functions

Ben Hutchings
2014-06-07T01:26:28Z

From: Andreas Schwab <schwab@linux-m68k.org>

commit 8fe9c93e7453e67b8bd09f263ec1bb0783c733fc upstream.

GCC 4.8 now generates out-of-line vr save/restore functions when
optimizing for size. They are needed for the raid6 altivec support.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/powerpc/lib/crtsavres.S | 186 +++++++++++++++++++++++++++++++++++++++++++
scripts/mod/modpost.c | 8 +-
2 files changed, 192 insertions(+), 2 deletions(-)

--- a/arch/powerpc/lib/crtsavres.S
+++ b/arch/powerpc/lib/crtsavres.S
@@ -230,6 +230,87 @@ _GLOBAL(_rest32gpr_31_x)
mr 1,11
blr

+#ifdef CONFIG_ALTIVEC
+/* Called with r0 pointing just beyond the end of the vector save area. */
+
+_GLOBAL(_savevr_20)
+ li r11,-192
+ stvx vr20,r11,r0
+_GLOBAL(_savevr_21)
+ li r11,-176
+ stvx vr21,r11,r0
+_GLOBAL(_savevr_22)
+ li r11,-160
+ stvx vr22,r11,r0
+_GLOBAL(_savevr_23)
+ li r11,-144
+ stvx vr23,r11,r0
+_GLOBAL(_savevr_24)
+ li r11,-128
+ stvx vr24,r11,r0
+_GLOBAL(_savevr_25)
+ li r11,-112
+ stvx vr25,r11,r0
+_GLOBAL(_savevr_26)
+ li r11,-96
+ stvx vr26,r11,r0
+_GLOBAL(_savevr_27)
+ li r11,-80
+ stvx vr27,r11,r0
+_GLOBAL(_savevr_28)
+ li r11,-64
+ stvx vr28,r11,r0
+_GLOBAL(_savevr_29)
+ li r11,-48
+ stvx vr29,r11,r0
+_GLOBAL(_savevr_30)
+ li r11,-32
+ stvx vr30,r11,r0
+_GLOBAL(_savevr_31)
+ li r11,-16
+ stvx vr31,r11,r0
+ blr
+
+_GLOBAL(_restvr_20)
+ li r11,-192
+ lvx vr20,r11,r0
+_GLOBAL(_restvr_21)
+ li r11,-176
+ lvx vr21,r11,r0
+_GLOBAL(_restvr_22)
+ li r11,-160
+ lvx vr22,r11,r0
+_GLOBAL(_restvr_23)
+ li r11,-144
+ lvx vr23,r11,r0
+_GLOBAL(_restvr_24)
+ li r11,-128
+ lvx vr24,r11,r0
+_GLOBAL(_restvr_25)
+ li r11,-112
+ lvx vr25,r11,r0
+_GLOBAL(_restvr_26)
+ li r11,-96
+ lvx vr26,r11,r0
+_GLOBAL(_restvr_27)
+ li r11,-80
+ lvx vr27,r11,r0
+_GLOBAL(_restvr_28)
+ li r11,-64
+ lvx vr28,r11,r0
+_GLOBAL(_restvr_29)
+ li r11,-48
+ lvx vr29,r11,r0
+_GLOBAL(_restvr_30)
+ li r11,-32
+ lvx vr30,r11,r0
+_GLOBAL(_restvr_31)
+ li r11,-16
+ lvx vr31,r11,r0
+ blr
+
+#endif /* CONFIG_ALTIVEC */
+
#else /* CONFIG_PPC64 */

.globl _savegpr0_14
@@ -353,6 +434,111 @@ _restgpr0_31:
mtlr r0
blr

+#ifdef CONFIG_ALTIVEC
+/* Called with r0 pointing just beyond the end of the vector save area. */
+
+.globl _savevr_20
+_savevr_20:
+ li r12,-192
+ stvx vr20,r12,r0
+.globl _savevr_21
+_savevr_21:
+ li r12,-176
+ stvx vr21,r12,r0
+.globl _savevr_22
+_savevr_22:
+ li r12,-160
+ stvx vr22,r12,r0
+.globl _savevr_23
+_savevr_23:
+ li r12,-144
+ stvx vr23,r12,r0
+.globl _savevr_24
+_savevr_24:
+ li r12,-128
+ stvx vr24,r12,r0
+.globl _savevr_25
+_savevr_25:
+ li r12,-112
+ stvx vr25,r12,r0
+.globl _savevr_26
+_savevr_26:
+ li r12,-96
+ stvx vr26,r12,r0
+.globl _savevr_27
+_savevr_27:
+ li r12,-80
+ stvx vr27,r12,r0
+.globl _savevr_28
+_savevr_28:
+ li r12,-64
+ stvx vr28,r12,r0
+.globl _savevr_29
+_savevr_29:
+ li r12,-48
+ stvx vr29,r12,r0
+.globl _savevr_30
+_savevr_30:
+ li r12,-32
+ stvx vr30,r12,r0
+.globl _savevr_31
+_savevr_31:
+ li r12,-16
+ stvx vr31,r12,r0
+ blr
+
+.globl _restvr_20
+_restvr_20:
+ li r12,-192
+ lvx vr20,r12,r0
+.globl _restvr_21
+_restvr_21:
+ li r12,-176
+ lvx vr21,r12,r0
+.globl _restvr_22
+_restvr_22:
+ li r12,-160
+ lvx vr22,r12,r0
+.globl _restvr_23
+_restvr_23:
+ li r12,-144
+ lvx vr23,r12,r0
+.globl _restvr_24
+_restvr_24:
+ li r12,-128
+ lvx vr24,r12,r0
+.globl _restvr_25
+_restvr_25:
+ li r12,-112
+ lvx vr25,r12,r0
+.globl _restvr_26
+_restvr_26:
+ li r12,-96
+ lvx vr26,r12,r0
+.globl _restvr_27
+_restvr_27:
+ li r12,-80
+ lvx vr27,r12,r0
+.globl _restvr_28
+_restvr_28:
+ li r12,-64
+ lvx vr28,r12,r0
+.globl _restvr_29
+_restvr_29:
+ li r12,-48
+ lvx vr29,r12,r0
+.globl _restvr_30
+_restvr_30:
+ li r12,-32
+ lvx vr30,r12,r0
+.globl _restvr_31
+_restvr_31:
+ li r12,-16
+ lvx vr31,r12,r0
+ blr
+
+#endif /* CONFIG_ALTIVEC */
+
#endif /* CONFIG_PPC64 */

#endif
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -569,12 +569,16 @@ static int ignore_undef_symbol(struct el
if (strncmp(symname, "_restgpr_", sizeof("_restgpr_") - 1) == 0 ||
strncmp(symname, "_savegpr_", sizeof("_savegpr_") - 1) == 0 ||
strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 ||
- strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0)
+ strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0 ||
+ strncmp(symname, "_restvr_", sizeof("_restvr_") - 1) == 0 ||
+ strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0)
return 1;
if (info->hdr->e_machine == EM_PPC64)
/* Special register function linked on all modules during final link of .ko */
if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 ||
- strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0)
+ strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0 ||
+ strncmp(symname, "_restvr_", sizeof("_restvr_") - 1) == 0 ||
+ strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0)
return 1;
/* Do not ignore this symbol */
return 0;