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-rw-r--r--arch/s390/include/asm/fpu/api.h119
-rw-r--r--arch/s390/include/asm/fpu/internal.h61
-rw-r--r--arch/s390/include/asm/fpu/types.h38
3 files changed, 0 insertions, 218 deletions
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
deleted file mode 100644
index 9acf48e53a87..000000000000
--- a/arch/s390/include/asm/fpu/api.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * In-kernel FPU support functions
- *
- *
- * Consider these guidelines before using in-kernel FPU functions:
- *
- * 1. Use kernel_fpu_begin() and kernel_fpu_end() to enclose all in-kernel
- * use of floating-point or vector registers and instructions.
- *
- * 2. For kernel_fpu_begin(), specify the vector register range you want to
- * use with the KERNEL_VXR_* constants. Consider these usage guidelines:
- *
- * a) If your function typically runs in process-context, use the lower
- * half of the vector registers, for example, specify KERNEL_VXR_LOW.
- * b) If your function typically runs in soft-irq or hard-irq context,
- * prefer using the upper half of the vector registers, for example,
- * specify KERNEL_VXR_HIGH.
- *
- * If you adhere to these guidelines, an interrupted process context
- * does not require to save and restore vector registers because of
- * disjoint register ranges.
- *
- * Also note that the __kernel_fpu_begin()/__kernel_fpu_end() functions
- * includes logic to save and restore up to 16 vector registers at once.
- *
- * 3. You can nest kernel_fpu_begin()/kernel_fpu_end() by using different
- * struct kernel_fpu states. Vector registers that are in use by outer
- * levels are saved and restored. You can minimize the save and restore
- * effort by choosing disjoint vector register ranges.
- *
- * 5. To use vector floating-point instructions, specify the KERNEL_FPC
- * flag to save and restore floating-point controls in addition to any
- * vector register range.
- *
- * 6. To use floating-point registers and instructions only, specify the
- * KERNEL_FPR flag. This flag triggers a save and restore of vector
- * registers V0 to V15 and floating-point controls.
- *
- * 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
-
-#include <linux/preempt.h>
-#include <asm/asm-extable.h>
-
-void save_fpu_regs(void);
-void load_fpu_regs(void);
-void __load_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;
-}
-
-#define KERNEL_FPC 1
-#define KERNEL_VXR_V0V7 2
-#define KERNEL_VXR_V8V15 4
-#define KERNEL_VXR_V16V23 8
-#define KERNEL_VXR_V24V31 16
-
-#define KERNEL_VXR_LOW (KERNEL_VXR_V0V7|KERNEL_VXR_V8V15)
-#define KERNEL_VXR_MID (KERNEL_VXR_V8V15|KERNEL_VXR_V16V23)
-#define KERNEL_VXR_HIGH (KERNEL_VXR_V16V23|KERNEL_VXR_V24V31)
-
-#define KERNEL_VXR (KERNEL_VXR_LOW|KERNEL_VXR_HIGH)
-#define KERNEL_FPR (KERNEL_FPC|KERNEL_VXR_LOW)
-
-struct kernel_fpu;
-
-/*
- * Note the functions below must be called with preemption disabled.
- * Do not enable preemption before calling __kernel_fpu_end() to prevent
- * an corruption of an existing kernel FPU state.
- *
- * Prefer using the kernel_fpu_begin()/kernel_fpu_end() pair of functions.
- */
-void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags);
-void __kernel_fpu_end(struct kernel_fpu *state, u32 flags);
-
-
-static inline void kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
-{
- preempt_disable();
- state->mask = S390_lowcore.fpu_flags;
- if (!test_cpu_flag(CIF_FPU))
- /* Save user space FPU state and register contents */
- save_fpu_regs();
- else if (state->mask & flags)
- /* Save FPU/vector register in-use by the kernel */
- __kernel_fpu_begin(state, flags);
- S390_lowcore.fpu_flags |= flags;
-}
-
-static inline void kernel_fpu_end(struct kernel_fpu *state, u32 flags)
-{
- S390_lowcore.fpu_flags = state->mask;
- if (state->mask & flags)
- /* Restore FPU/vector register in-use by the kernel */
- __kernel_fpu_end(state, flags);
- preempt_enable();
-}
-
-#endif /* _ASM_S390_FPU_API_H */
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h
deleted file mode 100644
index 8634581b9011..000000000000
--- a/arch/s390/include/asm/fpu/internal.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * 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/fpu/types.h>
-
-static inline void save_vx_regs(__vector128 *vxrs)
-{
- 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");
-}
-
-static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs)
-{
- int i;
-
- for (i = 0; i < __NUM_FPRS; i++)
- fprs[i].ui = vxrs[i].high;
-}
-
-static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
-{
- int i;
-
- for (i = 0; i < __NUM_FPRS; i++)
- vxrs[i].high = fprs[i].ui;
-}
-
-static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
-{
- fpregs->pad = 0;
- fpregs->fpc = fpu->fpc;
- 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)
-{
- fpu->fpc = fpregs->fpc;
- 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
deleted file mode 100644
index d889e9436865..000000000000
--- a/arch/s390/include/asm/fpu/types.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * 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 */
- void *regs; /* Pointer to the current save area */
- union {
- /* Floating-point register save area */
- freg_t fprs[__NUM_FPRS];
- /* Vector register save area */
- __vector128 vxrs[__NUM_VXRS];
- };
-};
-
-/* VX array structure for address operand constraints in inline assemblies */
-struct vx_array { __vector128 _[__NUM_VXRS]; };
-
-/* In-kernel FPU state structure */
-struct kernel_fpu {
- u32 mask;
- u32 fpc;
- union {
- freg_t fprs[__NUM_FPRS];
- __vector128 vxrs[__NUM_VXRS];
- };
-};
-
-#endif /* _ASM_S390_FPU_TYPES_H */
generated by cgit (git 2.34.1) at 2025-07-25 07:58:43 +0000