powerpc/signal: Add unsafe_copy_ck{fpr/vsx}_from_user

Add unsafe_copy_ckfpr_from_user() and unsafe_copy_ckvsx_from_user()

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1040687aa27553d19f749f7fb48f0c07af98ee2d.1616151715.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index 1393876..a5152ff 100644 (file)
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -100,6 +100,26 @@ unsigned long copy_ckfpr_from_user(struct task_struct *task, void __user *from);
                unsafe_put_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
                                &buf[i], label);\
 } while (0)
+
+#define unsafe_copy_ckfpr_from_user(task, from, label) do {            \
+       struct task_struct *__t = task;                                 \
+       u64 __user *buf = (u64 __user *)from;                           \
+       int i;                                                          \
+                                                                       \
+       for (i = 0; i < ELF_NFPREG - 1 ; i++)                           \
+               unsafe_get_user(__t->thread.TS_CKFPR(i), &buf[i], label);\
+       unsafe_get_user(__t->thread.ckfp_state.fpscr, &buf[i], failed); \
+} while (0)
+
+#define unsafe_copy_ckvsx_from_user(task, from, label) do {            \
+       struct task_struct *__t = task;                                 \
+       u64 __user *buf = (u64 __user *)from;                           \
+       int i;                                                          \
+                                                                       \
+       for (i = 0; i < ELF_NVSRHALFREG ; i++)                          \
+               unsafe_get_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
+                               &buf[i], label);                        \
+} while (0)
 #endif
 #elif defined(CONFIG_PPC_FPU_REGS)