diff options
| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2015-02-18 14:46:00 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-14 16:54:11 +0200 |
| commit | 04864808029e59ea1bf075c756a0f35c8398fc11 (patch) | |
| tree | 266b3ce8c6c7d6f3389778ffafb4112b528114b0 /arch/s390/include/asm/fpu/types.h | |
| parent | de3fa841e429de7e288facf9b642948677fac581 (diff) | |
s390/vx: add support functions for in-kernel FPU use
Introduce the kernel_fpu_begin() and kernel_fpu_end() function
to enclose any in-kernel use of FPU instructions and registers.
In enclosed sections, you can perform floating-point or vector
(SIMD) computations. The functions take care of saving and
restoring FPU register contents and controls.
For usage details, see the guidelines in arch/s390/include/asm/fpu/api.h
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/fpu/types.h')
| -rw-r--r-- | arch/s390/include/asm/fpu/types.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/s390/include/asm/fpu/types.h b/arch/s390/include/asm/fpu/types.h index fe937c9b6471..bce255ead72b 100644 --- a/arch/s390/include/asm/fpu/types.h +++ b/arch/s390/include/asm/fpu/types.h @@ -24,4 +24,14 @@ struct fpu { /* 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 */ |