[kvm-unit-tests GIT PULL 14/18] s390x: Move SIE assembly into new file

[Nico Boehr <nrb@linux.ibm.com>]

From: Janosch Frank <frankja@linux.ibm.com>

In contrast to the other functions in cpu.S it's quite lengthy so
let's split it off.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Link: https://lore.kernel.org/r/20240806084409.169039-4-frankja@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
---
 s390x/Makefile  |  2 +-
 s390x/cpu-sie.S | 74 +++++++++++++++++++++++++++++++++++++++++++++++++
 s390x/cpu.S     | 64 ------------------------------------------
 3 files changed, 75 insertions(+), 65 deletions(-)
 create mode 100644 s390x/cpu-sie.S

diff --git a/s390x/Makefile b/s390x/Makefile
index 63e96d86..e5572cb6 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -122,7 +122,7 @@ cflatobjs += lib/s390x/fault.o
 
 OBJDIRS += lib/s390x
 
-asmlib = $(TEST_DIR)/cstart64.o $(TEST_DIR)/cpu.o
+asmlib = $(TEST_DIR)/cstart64.o $(TEST_DIR)/cpu.o $(TEST_DIR)/cpu-sie.o
 
 FLATLIBS = $(libcflat)
 
diff --git a/s390x/cpu-sie.S b/s390x/cpu-sie.S
new file mode 100644
index 00000000..9370b5c0
--- /dev/null
+++ b/s390x/cpu-sie.S
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * s390x SIE assembly library
+ *
+ * Copyright (c) 2019 IBM Corp.
+ *
+ * Authors:
+ *    Janosch Frank <frankja@linux.ibm.com>
+ */
+#include <asm/asm-offsets.h>
+
+/*
+ * sie64a calling convention:
+ * %r2 pointer to sie control block
+ * %r3 guest register save area
+ */
+.globl sie64a
+sie64a:
+	# Save host grs, fprs, fpc
+	stmg	%r0,%r14,SIE_SAVEAREA_HOST_GRS(%r3)	# save kernel registers
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	std	\i, \i * 8  + SIE_SAVEAREA_HOST_FPRS(%r3)
+	.endr
+	stfpc	SIE_SAVEAREA_HOST_FPC(%r3)
+
+	stctg	%c1, %c1, SIE_SAVEAREA_HOST_ASCE(%r3)
+	lctlg	%c1, %c1, SIE_SAVEAREA_GUEST_ASCE(%r3)
+
+	# Store scb and save_area pointer into stack frame
+	stg	%r2,__SF_SIE_CONTROL(%r15)	# save control block pointer
+	stg	%r3,__SF_SIE_SAVEAREA(%r15)	# save guest register save area
+.globl sie_entry_gregs
+sie_entry_gregs:
+	# Load guest's gprs, fprs and fpc
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	ld	\i, \i * 8 + SIE_SAVEAREA_GUEST_FPRS(%r3)
+	.endr
+	lfpc	SIE_SAVEAREA_GUEST_FPC(%r3)
+	lmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r3)
+
+	# Move scb ptr into r14 for the sie instruction
+	lg	%r14,__SF_SIE_CONTROL(%r15)
+
+.globl sie_entry
+sie_entry:
+	sie	0(%r14)
+	nopr	7
+	nopr	7
+	nopr	7
+
+.globl sie_exit
+sie_exit:
+	# Load guest register save area
+	lg	%r14,__SF_SIE_SAVEAREA(%r15)
+
+	# Restore the host asce
+	lctlg	%c1, %c1, SIE_SAVEAREA_HOST_ASCE(%r14)
+
+	# Store guest's gprs, fprs and fpc
+	stmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r14)	# save guest gprs 0-13
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	std	\i, \i * 8  + SIE_SAVEAREA_GUEST_FPRS(%r14)
+	.endr
+	stfpc	SIE_SAVEAREA_GUEST_FPC(%r14)
+
+	# Restore host's gprs, fprs and fpc
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	ld	\i, \i * 8 + SIE_SAVEAREA_HOST_FPRS(%r14)
+	.endr
+	lfpc	SIE_SAVEAREA_HOST_FPC(%r14)
+	lmg	%r0,%r14,SIE_SAVEAREA_HOST_GRS(%r14)	# restore kernel registers
+.globl sie_exit_gregs
+sie_exit_gregs:
+	br	%r14
diff --git a/s390x/cpu.S b/s390x/cpu.S
index 9155b044..2ff4b8e1 100644
--- a/s390x/cpu.S
+++ b/s390x/cpu.S
@@ -62,70 +62,6 @@ smp_cpu_setup_state:
 	/* If the function returns, just loop here */
 0:	j	0
 
-/*
- * sie64a calling convention:
- * %r2 pointer to sie control block
- * %r3 guest register save area
- */
-.globl sie64a
-sie64a:
-	# Save host grs, fprs, fpc
-	stmg	%r0,%r14,SIE_SAVEAREA_HOST_GRS(%r3)	# save kernel registers
-	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	std	\i, \i * 8  + SIE_SAVEAREA_HOST_FPRS(%r3)
-	.endr
-	stfpc	SIE_SAVEAREA_HOST_FPC(%r3)
-
-	stctg	%c1, %c1, SIE_SAVEAREA_HOST_ASCE(%r3)
-	lctlg	%c1, %c1, SIE_SAVEAREA_GUEST_ASCE(%r3)
-
-	# Store scb and save_area pointer into stack frame
-	stg	%r2,__SF_SIE_CONTROL(%r15)	# save control block pointer
-	stg	%r3,__SF_SIE_SAVEAREA(%r15)	# save guest register save area
-.globl sie_entry_gregs
-sie_entry_gregs:
-	# Load guest's gprs, fprs and fpc
-	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	ld	\i, \i * 8 + SIE_SAVEAREA_GUEST_FPRS(%r3)
-	.endr
-	lfpc	SIE_SAVEAREA_GUEST_FPC(%r3)
-	lmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r3)
-
-	# Move scb ptr into r14 for the sie instruction
-	lg	%r14,__SF_SIE_CONTROL(%r15)
-
-.globl sie_entry
-sie_entry:
-	sie	0(%r14)
-	nopr	7
-	nopr	7
-	nopr	7
-
-.globl sie_exit
-sie_exit:
-	# Load guest register save area
-	lg	%r14,__SF_SIE_SAVEAREA(%r15)
-
-	# Restore the host asce
-	lctlg	%c1, %c1, SIE_SAVEAREA_HOST_ASCE(%r14)
-
-	# Store guest's gprs, fprs and fpc
-	stmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r14)	# save guest gprs 0-13
-	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	std	\i, \i * 8  + SIE_SAVEAREA_GUEST_FPRS(%r14)
-	.endr
-	stfpc	SIE_SAVEAREA_GUEST_FPC(%r14)
-
-	# Restore host's gprs, fprs and fpc
-	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	ld	\i, \i * 8 + SIE_SAVEAREA_HOST_FPRS(%r14)
-	.endr
-	lfpc	SIE_SAVEAREA_HOST_FPC(%r14)
-	lmg	%r0,%r14,SIE_SAVEAREA_HOST_GRS(%r14)	# restore kernel registers
-.globl sie_exit_gregs
-sie_exit_gregs:
-	br	%r14
-
 	.align	8
 reset_psw:
 	.quad	0x0008000180000000
-- 
2.47.1