s390/dump: remove SAVE_AREA_BASE

Replace the SAVE_AREA_BASE offset calculations in reipl.S with the
assembler constant for the location of each register status area.

Use __LC_FPREGS_SAVE_AREA instead of SAVE_AREA_BASE in the three
remaining code locations and remove the definition of SAVE_AREA_BASE.
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/asm-offsets.c

@@ -175,7 +175,6 @@ int main(void)
 	/* hardware defined lowcore locations 0x1000 - 0x18ff */
 	OFFSET(__LC_VX_SAVE_AREA_ADDR, _lowcore, vector_save_area_addr);
 	OFFSET(__LC_EXT_PARAMS2, _lowcore, ext_params2);
-	OFFSET(SAVE_AREA_BASE, _lowcore, floating_pt_save_area);
 	OFFSET(__LC_FPREGS_SAVE_AREA, _lowcore, floating_pt_save_area);
 	OFFSET(__LC_GPREGS_SAVE_AREA, _lowcore, gpregs_save_area);
 	OFFSET(__LC_PSW_SAVE_AREA, _lowcore, psw_save_area);

arch/s390/kernel/machine_kexec.c

@@ -44,11 +44,11 @@ static void setup_regs(void)
 	int cpu, this_cpu;
 
 	/* setup_regs is called with the prefix register = 0 */
-	sa_0 = (struct save_area *) SAVE_AREA_BASE;
+	sa_0 = (struct save_area *) __LC_FPREGS_SAVE_AREA;
 
 	/* Get status of this CPU out of absolute zero */
 	prefix = (unsigned long) S390_lowcore.prefixreg_save_area;
-	sa = (struct save_area *)(prefix + SAVE_AREA_BASE);
+	sa = (struct save_area *)(prefix + __LC_FPREGS_SAVE_AREA);
 	memcpy(sa, sa_0, sizeof(struct save_area));
 	if (MACHINE_HAS_VX) {
 		struct _lowcore *lc = (struct _lowcore *) prefix;
@@ -63,7 +63,7 @@ static void setup_regs(void)
 		if (smp_store_status(cpu))
 			continue;
 		prefix = (unsigned long) S390_lowcore.prefixreg_save_area;
-		sa = (struct save_area *)(prefix + SAVE_AREA_BASE);
+		sa = (struct save_area *)(prefix + __LC_FPREGS_SAVE_AREA);
 		memcpy(sa, sa_0, sizeof(struct save_area));
 	}
 }

arch/s390/kernel/reipl.S

@@ -19,49 +19,56 @@
 ENTRY(store_status)
 	/* Save register one and load save area base */
 	stg	%r1,__LC_SAVE_AREA_RESTART
-	lghi	%r1,SAVE_AREA_BASE
 	/* General purpose registers */
-	stmg	%r0,%r15,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	lg	%r2,__LC_SAVE_AREA_RESTART
-	stg	%r2,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE+8(%r1)
+	lghi	%r1,__LC_GPREGS_SAVE_AREA
+	stmg	%r0,%r15,0(%r1)
+	mvc	8(8,%r1),__LC_SAVE_AREA_RESTART
 	/* Control registers */
-	stctg	%c0,%c15,__LC_CREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+	lghi	%r1,__LC_CREGS_SAVE_AREA
+	stctg	%c0,%c15,0(%r1)
 	/* Access registers */
-	stam	%a0,%a15,__LC_AREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+	lghi	%r1,__LC_AREGS_SAVE_AREA
+	stam	%a0,%a15,0(%r1)
 	/* Floating point registers */
-	std	%f0, 0x00 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f1, 0x08 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f2, 0x10 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f3, 0x18 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f4, 0x20 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f5, 0x28 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f6, 0x30 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f7, 0x38 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f8, 0x40 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f9, 0x48 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f10,0x50 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f11,0x58 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f12,0x60 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f13,0x68 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f14,0x70 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
-	std	%f15,0x78 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+	lghi	%r1,__LC_FPREGS_SAVE_AREA
+	std	%f0, 0x00(%r1)
+	std	%f1, 0x08(%r1)
+	std	%f2, 0x10(%r1)
+	std	%f3, 0x18(%r1)
+	std	%f4, 0x20(%r1)
+	std	%f5, 0x28(%r1)
+	std	%f6, 0x30(%r1)
+	std	%f7, 0x38(%r1)
+	std	%f8, 0x40(%r1)
+	std	%f9, 0x48(%r1)
+	std	%f10,0x50(%r1)
+	std	%f11,0x58(%r1)
+	std	%f12,0x60(%r1)
+	std	%f13,0x68(%r1)
+	std	%f14,0x70(%r1)
+	std	%f15,0x78(%r1)
 	/* Floating point control register */
-	stfpc	__LC_FP_CREG_SAVE_AREA-SAVE_AREA_BASE(%r1)
+	lghi	%r1,__LC_FP_CREG_SAVE_AREA
+	stfpc	0(%r1)
 	/* CPU timer */
-	stpt	__LC_CPU_TIMER_SAVE_AREA-SAVE_AREA_BASE(%r1)
+	lghi	%r1,__LC_CPU_TIMER_SAVE_AREA
+	stpt	0(%r1)
 	/* Saved prefix register */
+	lghi	%r1,__LC_PREFIX_SAVE_AREA
 	larl	%r2,dump_prefix_page
-	mvc	__LC_PREFIX_SAVE_AREA-SAVE_AREA_BASE(4,%r1),0(%r2)
+	mvc	0(4,%r1),0(%r2)
 	/* Clock comparator - seven bytes */
+	lghi	%r1,__LC_CLOCK_COMP_SAVE_AREA
 	larl	%r2,.Lclkcmp
 	stckc	0(%r2)
-	mvc	__LC_CLOCK_COMP_SAVE_AREA-SAVE_AREA_BASE + 1(7,%r1),1(%r2)
+	mvc	1(7,%r1),1(%r2)
 	/* Program status word */
+	lghi	%r1,__LC_PSW_SAVE_AREA
 	epsw	%r2,%r3
-	st	%r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 0(%r1)
-	st	%r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
+	st	%r2,0(%r1)
+	st	%r3,4(%r1)
 	larl	%r2,store_status
-	stg	%r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
+	stg	%r2,8(%r1)
 	br	%r14
 
 	.section .bss

arch/s390/kernel/smp.c

@@ -546,7 +546,7 @@ static void __init __smp_store_cpu_state(struct save_area_ext *sa_ext,
 
 	if (is_boot_cpu) {
 		/* Copy the registers of the boot CPU. */
-		copy_oldmem_kernel(&sa_ext->sa, (void *) SAVE_AREA_BASE,
+		copy_oldmem_kernel(&sa_ext->sa, (void *) __LC_FPREGS_SAVE_AREA,
 				   sizeof(sa_ext->sa));
 		if (MACHINE_HAS_VX)
 			save_vx_regs_safe(sa_ext->vx_regs);
@@ -554,7 +554,7 @@ static void __init __smp_store_cpu_state(struct save_area_ext *sa_ext,
 	}
 	/* Get the registers of a non-boot cpu. */
 	__pcpu_sigp_relax(address, SIGP_STOP_AND_STORE_STATUS, 0, NULL);
-	memcpy_real(&sa_ext->sa, lc + SAVE_AREA_BASE, sizeof(sa_ext->sa));
+	memcpy_real(&sa_ext->sa, lc + __LC_FPREGS_SAVE_AREA, sizeof(sa_ext->sa));
 	if (!MACHINE_HAS_VX)
 		return;
 	/* Get the VX registers */

drivers/s390/char/zcore.c

@@ -124,7 +124,7 @@ static int __init init_cpu_info(void)
 	sa_ext = dump_save_areas.areas[0];
 	if (!sa_ext)
 		return -ENOMEM;
-	if (memcpy_hsa_kernel(&sa_ext->sa, SAVE_AREA_BASE,
+	if (memcpy_hsa_kernel(&sa_ext->sa, __LC_FPREGS_SAVE_AREA,
 			      sizeof(struct save_area)) < 0) {
 		TRACE("could not copy from HSA\n");
 		return -EIO;