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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-02-03 13:45:12 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-02-16 16:30:15 +0300 |
| commit | 4eed43de9ba0ae3af6716544408d185a152424cd (patch) | |
| tree | ee2921767b33f83258559e00906400ca8b7ce84b /arch/s390/include/asm/processor.h | |
| parent | c038b984a9af1010555986d6fe32d4da9db9fc3d (diff) | |
| download | linux-4eed43de9ba0ae3af6716544408d185a152424cd.tar.xz | |
s390/fpu: make kernel fpu context preemptible
Make the kernel fpu context preemptible. Add another fpu structure to the
thread_struct, and use it to save and restore the kernel fpu context if its
task uses fpu registers when it is preempted.
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 2e716bf34bf8..eee0a1eec620 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -166,6 +166,7 @@ struct thread_struct { unsigned int gmap_write_flag; /* gmap fault write indication */ unsigned int gmap_int_code; /* int code of last gmap fault */ unsigned int gmap_pfault; /* signal of a pending guest pfault */ + int kfpu_flags; /* kernel fpu flags */ /* Per-thread information related to debugging */ struct per_regs per_user; /* User specified PER registers */ @@ -182,6 +183,7 @@ struct thread_struct { struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */ struct pgm_tdb trap_tdb; /* Transaction abort diagnose block */ struct fpu ufpu; /* User FP and VX register save area */ + struct fpu kfpu; /* Kernel FP and VX register save area */ }; /* Flag to disable transactions. */ |