From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Tue, 6 Oct 2015 10:25:59 +0000 (+0200)
Subject: s390/fpu: split fpu-internal.h into fpu internals, api, and type headers
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b0753902d42f5cb01c33f0dec47ba2aa7ecfbb3f;p=linux.git
s390/fpu: split fpu-internal.h into fpu internals, api, and type headers
Split the API and FPU type definitions into separate header files
similar to "x86/fpu: Rename fpu-internal.h to fpu/internal.h" (78f7f1e54b).
The new header files and their meaning are:
asm/fpu/types.h:
FPU related data types, needed for 'struct thread_struct' and
'struct task_struct'.
asm/fpu/api.h:
FPU related 'public' functions for other subsystems and device
drivers.
asm/fpu/internal.h:
FPU internal functions mainly used to convert
FPU register contents in signal handling.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
diff --git a/arch/s390/include/asm/fpu-internal.h b/arch/s390/include/asm/fpu-internal.h
deleted file mode 100644
index cd79a3355b2a0..0000000000000
--- a/arch/s390/include/asm/fpu-internal.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * General floating pointer and vector register helpers
- *
- * Copyright IBM Corp. 2015
- * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
- */
-
-#ifndef _ASM_S390_FPU_INTERNAL_H
-#define _ASM_S390_FPU_INTERNAL_H
-
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <asm/linkage.h>
-#include <asm/ctl_reg.h>
-#include <asm/sigcontext.h>
-
-struct fpu {
- __u32 fpc; /* Floating-point control */
- union {
- void *regs;
- freg_t *fprs; /* Floating-point register save area */
- __vector128 *vxrs; /* Vector register save area */
- };
-};
-
-void save_fpu_regs(void);
-
-/* VX array structure for address operand constraints in inline assemblies */
-struct vx_array { __vector128 _[__NUM_VXRS]; };
-
-static inline int test_fp_ctl(u32 fpc)
-{
- u32 orig_fpc;
- int rc;
-
- asm volatile(
- " efpc %1\n"
- " sfpc %2\n"
- "0: sfpc %1\n"
- " la %0,0\n"
- "1:\n"
- EX_TABLE(0b,1b)
- : "=d" (rc), "=d" (orig_fpc)
- : "d" (fpc), "0" (-EINVAL));
- return rc;
-}
-
-static inline void save_vx_regs_safe(__vector128 *vxrs)
-{
- unsigned long cr0, flags;
-
- flags = arch_local_irq_save();
- __ctl_store(cr0, 0, 0);
- __ctl_set_bit(0, 17);
- __ctl_set_bit(0, 18);
- asm volatile(
- " la 1,%0\n"
- " .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */
- " .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */
- : "=Q" (*(struct vx_array *) vxrs) : : "1");
- __ctl_load(cr0, 0, 0);
- arch_local_irq_restore(flags);
-}
-
-static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs)
-{
- int i;
-
- for (i = 0; i < __NUM_FPRS; i++)
- fprs[i] = *(freg_t *)(vxrs + i);
-}
-
-static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
-{
- int i;
-
- for (i = 0; i < __NUM_FPRS; i++)
- *(freg_t *)(vxrs + i) = fprs[i];
-}
-
-static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
-{
- fpregs->pad = 0;
- if (MACHINE_HAS_VX)
- convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
- else
- memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
- sizeof(fpregs->fprs));
-}
-
-static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
-{
- if (MACHINE_HAS_VX)
- convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
- else
- memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
- sizeof(fpregs->fprs));
-}
-
-#endif /* _ASM_S390_FPU_INTERNAL_H */
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
new file mode 100644
index 0000000000000..5e04f3cbd320d
--- /dev/null
+++ b/arch/s390/include/asm/fpu/api.h
@@ -0,0 +1,30 @@
+/*
+ * In-kernel FPU support functions
+ *
+ * Copyright IBM Corp. 2015
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ */
+
+#ifndef _ASM_S390_FPU_API_H
+#define _ASM_S390_FPU_API_H
+
+void save_fpu_regs(void);
+
+static inline int test_fp_ctl(u32 fpc)
+{
+ u32 orig_fpc;
+ int rc;
+
+ asm volatile(
+ " efpc %1\n"
+ " sfpc %2\n"
+ "0: sfpc %1\n"
+ " la %0,0\n"
+ "1:\n"
+ EX_TABLE(0b,1b)
+ : "=d" (rc), "=d" (orig_fpc)
+ : "d" (fpc), "0" (-EINVAL));
+ return rc;
+}
+
+#endif /* _ASM_S390_FPU_API_H */
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h
new file mode 100644
index 0000000000000..2559b16da525e
--- /dev/null
+++ b/arch/s390/include/asm/fpu/internal.h
@@ -0,0 +1,67 @@
+/*
+ * FPU state and register content conversion primitives
+ *
+ * Copyright IBM Corp. 2015
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ */
+
+#ifndef _ASM_S390_FPU_INTERNAL_H
+#define _ASM_S390_FPU_INTERNAL_H
+
+#include <linux/string.h>
+#include <asm/ctl_reg.h>
+#include <asm/fpu/types.h>
+
+static inline void save_vx_regs_safe(__vector128 *vxrs)
+{
+ unsigned long cr0, flags;
+
+ flags = arch_local_irq_save();
+ __ctl_store(cr0, 0, 0);
+ __ctl_set_bit(0, 17);
+ __ctl_set_bit(0, 18);
+ asm volatile(
+ " la 1,%0\n"
+ " .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */
+ " .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */
+ : "=Q" (*(struct vx_array *) vxrs) : : "1");
+ __ctl_load(cr0, 0, 0);
+ arch_local_irq_restore(flags);
+}
+
+static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs)
+{
+ int i;
+
+ for (i = 0; i < __NUM_FPRS; i++)
+ fprs[i] = *(freg_t *)(vxrs + i);
+}
+
+static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
+{
+ int i;
+
+ for (i = 0; i < __NUM_FPRS; i++)
+ *(freg_t *)(vxrs + i) = fprs[i];
+}
+
+static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
+{
+ fpregs->pad = 0;
+ if (MACHINE_HAS_VX)
+ convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
+ else
+ memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
+ sizeof(fpregs->fprs));
+}
+
+static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
+{
+ if (MACHINE_HAS_VX)
+ convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
+ else
+ memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
+ sizeof(fpregs->fprs));
+}
+
+#endif /* _ASM_S390_FPU_INTERNAL_H */
diff --git a/arch/s390/include/asm/fpu/types.h b/arch/s390/include/asm/fpu/types.h
new file mode 100644
index 0000000000000..14a8b0c14f876
--- /dev/null
+++ b/arch/s390/include/asm/fpu/types.h
@@ -0,0 +1,25 @@
+/*
+ * FPU data structures
+ *
+ * Copyright IBM Corp. 2015
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ */
+
+#ifndef _ASM_S390_FPU_TYPES_H
+#define _ASM_S390_FPU_TYPES_H
+
+#include <asm/sigcontext.h>
+
+struct fpu {
+ __u32 fpc; /* Floating-point control */
+ union {
+ void *regs;
+ freg_t *fprs; /* Floating-point register save area */
+ __vector128 *vxrs; /* Vector register save area */
+ };
+};
+
+/* VX array structure for address operand constraints in inline assemblies */
+struct vx_array { __vector128 _[__NUM_VXRS]; };
+
+#endif /* _ASM_S390_FPU_TYPES_H */
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 8ced426091e10..7f654308817cd 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -22,7 +22,7 @@
#include <linux/kvm.h>
#include <asm/debug.h>
#include <asm/cpu.h>
-#include <asm/fpu-internal.h>
+#include <asm/fpu/api.h>
#include <asm/isc.h>
#define KVM_MAX_VCPUS 64
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 43ff624f75102..a83015e17f393 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -16,7 +16,7 @@
#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
#define CIF_ASCE 1 /* user asce needs fixup / uaccess */
#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
-#define CIF_FPU 3 /* restore vector registers */
+#define CIF_FPU 3 /* restore FPU registers */
#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */
#define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING)
@@ -34,7 +34,8 @@
#include <asm/ptrace.h>
#include <asm/setup.h>
#include <asm/runtime_instr.h>
-#include <asm/fpu-internal.h>
+#include <asm/fpu/types.h>
+#include <asm/fpu/internal.h>
static inline void set_cpu_flag(int flag)
{
diff --git a/arch/s390/include/asm/switch_to.h b/arch/s390/include/asm/switch_to.h
index dcadfde32265a..12d45f0cfdd93 100644
--- a/arch/s390/include/asm/switch_to.h
+++ b/arch/s390/include/asm/switch_to.h
@@ -8,7 +8,7 @@
#define __ASM_SWITCH_TO_H
#include <linux/thread_info.h>
-#include <asm/fpu-internal.h>
+#include <asm/fpu/api.h>
#include <asm/ptrace.h>
extern struct task_struct *__switch_to(void *, void *);
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 4082885dd4fb0..faa40bf622f8d 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -21,7 +21,6 @@
#include <asm/nmi.h>
#include <asm/crw.h>
#include <asm/switch_to.h>
-#include <asm/fpu-internal.h>
#include <asm/ctl_reg.h>
struct mcck_struct {
diff --git a/arch/s390/kernel/s390_ksyms.c b/arch/s390/kernel/s390_ksyms.c
index d9325b760596c..e67453b73c3c7 100644
--- a/arch/s390/kernel/s390_ksyms.c
+++ b/arch/s390/kernel/s390_ksyms.c
@@ -1,6 +1,6 @@
#include <linux/module.h>
#include <linux/kvm_host.h>
-#include <asm/fpu-internal.h>
+#include <asm/fpu/api.h>
#include <asm/ftrace.h>
#ifdef CONFIG_FUNCTION_TRACER
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index d9c45318f19b3..1b18118bbc06b 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -19,7 +19,7 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <asm/fpu-internal.h>
+#include <asm/fpu/api.h>
#include "entry.h"
int show_unhandled_signals = 1;