powerpc: Add VSX context save/restore, ptrace and signal support

[linux-2.6-omap-h63xx.git] / arch / powerpc / kernel / ptrace.c

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 70fbde84b83f28fa9e6487421d2f5ffaa10ff117..4e203a89e1890daef54c1134a4b4fdf18491534c 100644 (file)
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -350,6 +350,51 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
 }
 #endif /* CONFIG_ALTIVEC */
 
+#ifdef CONFIG_VSX
+/*
+ * Currently to set and and get all the vsx state, you need to call
+ * the fp and VMX calls aswell.  This only get/sets the lower 32
+ * 128bit VSX registers.
+ */
+
+static int vsr_active(struct task_struct *target,
+                     const struct user_regset *regset)
+{
+       flush_vsx_to_thread(target);
+       return target->thread.used_vsr ? regset->n : 0;
+}
+
+static int vsr_get(struct task_struct *target, const struct user_regset *regset,
+                  unsigned int pos, unsigned int count,
+                  void *kbuf, void __user *ubuf)
+{
+       int ret;
+
+       flush_vsx_to_thread(target);
+
+       ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+                                 target->thread.fpr, 0,
+                                 32 * sizeof(vector128));
+
+       return ret;
+}
+
+static int vsr_set(struct task_struct *target, const struct user_regset *regset,
+                  unsigned int pos, unsigned int count,
+                  const void *kbuf, const void __user *ubuf)
+{
+       int ret;
+
+       flush_vsx_to_thread(target);
+
+       ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+                                target->thread.fpr, 0,
+                                32 * sizeof(vector128));
+
+       return ret;
+}
+#endif /* CONFIG_VSX */
+
 #ifdef CONFIG_SPE
 
 /*
@@ -426,6 +471,9 @@ enum powerpc_regset {
 #ifdef CONFIG_ALTIVEC
        REGSET_VMX,
 #endif
+#ifdef CONFIG_VSX
+       REGSET_VSX,
+#endif
 #ifdef CONFIG_SPE
        REGSET_SPE,
 #endif
@@ -449,6 +497,13 @@ static const struct user_regset native_regsets[] = {
                .active = vr_active, .get = vr_get, .set = vr_set
        },
 #endif
+#ifdef CONFIG_VSX
+       [REGSET_VSX] = {
+               .n = 32,
+               .size = sizeof(vector128), .align = sizeof(vector128),
+               .active = vsr_active, .get = vsr_get, .set = vsr_set
+       },
+#endif
 #ifdef CONFIG_SPE
        [REGSET_SPE] = {
                .n = 35,
@@ -849,6 +904,21 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                                 sizeof(u32)),
                                             (const void __user *) data);
 #endif
+#ifdef CONFIG_VSX
+       case PTRACE_GETVSRREGS:
+               return copy_regset_to_user(child, &user_ppc_native_view,
+                                          REGSET_VSX,
+                                          0, (32 * sizeof(vector128) +
+                                              sizeof(u32)),
+                                          (void __user *) data);
+
+       case PTRACE_SETVSRREGS:
+               return copy_regset_from_user(child, &user_ppc_native_view,
+                                            REGSET_VSX,
+                                            0, (32 * sizeof(vector128) +
+                                                sizeof(u32)),
+                                            (const void __user *) data);
+#endif
 #ifdef CONFIG_SPE
        case PTRACE_GETEVRREGS:
                /* Get the child spe register state. */