powerpc: Add vr save/restore functions

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>

diff --git a/arch/powerpc/lib/crtsavres.S b/arch/powerpc/lib/crtsavres.S
index b2c68ce..a5b30c7 100644 (file)
--- a/arch/powerpc/lib/crtsavres.S
+++ b/arch/powerpc/lib/crtsavres.S
@@ -231,6 +231,87 @@ _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 */
 
        .section ".text.save.restore","ax",@progbits
@@ -356,6 +437,111 @@ _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

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 1785576..4061098 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -584,12 +584,16 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
                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;