diff options
Diffstat (limited to 'arch/s390/kernel/process.c')
| -rw-r--r-- | arch/s390/kernel/process.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 4e3b366589fb6a..dd456b4758611c 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -31,15 +31,19 @@ #include <linux/init_task.h> #include <linux/entry-common.h> #include <linux/io.h> +#include <asm/guarded_storage.h> +#include <asm/access-regs.h> +#include <asm/switch_to.h> #include <asm/cpu_mf.h> #include <asm/processor.h> +#include <asm/ptrace.h> #include <asm/vtimer.h> #include <asm/exec.h> +#include <asm/fpu.h> #include <asm/irq.h> #include <asm/nmi.h> #include <asm/smp.h> #include <asm/stacktrace.h> -#include <asm/switch_to.h> #include <asm/runtime_instr.h> #include <asm/unwind.h> #include "entry.h" @@ -84,13 +88,13 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { /* * Save the floating-point or vector register state of the current - * task and set the CIF_FPU flag to lazy restore the FPU register + * task and set the TIF_FPU flag to lazy restore the FPU register * state when returning to user space. */ - save_fpu_regs(); + save_user_fpu_regs(); *dst = *src; - dst->thread.fpu.regs = dst->thread.fpu.fprs; + dst->thread.kfpu_flags = 0; /* * Don't transfer over the runtime instrumentation or the guarded @@ -186,8 +190,23 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) void execve_tail(void) { - current->thread.fpu.fpc = 0; - asm volatile("sfpc %0" : : "d" (0)); + current->thread.ufpu.fpc = 0; + fpu_sfpc(0); +} + +struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next) +{ + save_user_fpu_regs(); + save_kernel_fpu_regs(&prev->thread); + save_access_regs(&prev->thread.acrs[0]); + save_ri_cb(prev->thread.ri_cb); + save_gs_cb(prev->thread.gs_cb); + update_cr_regs(next); + restore_kernel_fpu_regs(&next->thread); + restore_access_regs(&next->thread.acrs[0]); + restore_ri_cb(next->thread.ri_cb, prev->thread.ri_cb); + restore_gs_cb(next->thread.gs_cb); + return __switch_to_asm(prev, next); } unsigned long __get_wchan(struct task_struct *p) |