s390/kernel: Introduce memcpy_absolute() function

[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / s390 / kernel / ipl.c

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 8342e65..2f6cfd4 100644 (file)
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1528,12 +1528,15 @@ static struct shutdown_action __refdata dump_action = {
 
 static void dump_reipl_run(struct shutdown_trigger *trigger)
 {
-       u32 csum;
-
-       csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
-       copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
-       copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
-                             sizeof(reipl_block_actual));
+       struct {
+               void    *addr;
+               __u32   csum;
+       } __packed ipib;
+
+       ipib.csum = csum_partial(reipl_block_actual,
+                                reipl_block_actual->hdr.len, 0);
+       ipib.addr = reipl_block_actual;
+       memcpy_absolute(&S390_lowcore.ipib, &ipib, sizeof(ipib));
        dump_run(trigger);
 }
 
@@ -1750,6 +1753,7 @@ static struct kobj_attribute on_restart_attr =
 
 static void __do_restart(void *ignore)
 {
+       __arch_local_irq_stosm(0x04); /* enable DAT */
        smp_send_stop();
 #ifdef CONFIG_CRASH_DUMP
        crash_kexec(NULL);