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-rw-r--r--arch/s390/kernel/earlypgm.S23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/s390/kernel/earlypgm.S b/arch/s390/kernel/earlypgm.S
new file mode 100644
index 000000000..f521c6da3
--- /dev/null
+++ b/arch/s390/kernel/earlypgm.S
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2006, 2007
+ * Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+
+ENTRY(early_pgm_check_handler)
+ stmg %r8,%r15,__LC_SAVE_AREA_SYNC
+ aghi %r15,-(STACK_FRAME_OVERHEAD+__PT_SIZE)
+ la %r11,STACK_FRAME_OVERHEAD(%r15)
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ stmg %r0,%r7,__PT_R0(%r11)
+ mvc __PT_PSW(16,%r11),__LC_PGM_OLD_PSW
+ mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
+ lgr %r2,%r11
+ brasl %r14,__do_early_pgm_check
+ mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
+ lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
+ lpswe __LC_RETURN_PSW
+ENDPROC(early_pgm_check_handler)