diff options
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 113 |
1 files changed, 61 insertions, 52 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 7de41c3948ec..219f3634115e 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -53,6 +53,7 @@ extern unsigned long _get_SP(void); #ifndef CONFIG_SMP struct task_struct *last_task_used_math = NULL; struct task_struct *last_task_used_altivec = NULL; +struct task_struct *last_task_used_vsx = NULL; struct task_struct *last_task_used_spe = NULL; #endif @@ -104,17 +105,6 @@ void enable_kernel_fp(void) } EXPORT_SYMBOL(enable_kernel_fp); -int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs) -{ - if (!tsk->thread.regs) - return 0; - flush_fp_to_thread(current); - - memcpy(fpregs, &tsk->thread.fpr[0], sizeof(*fpregs)); - - return 1; -} - #ifdef CONFIG_ALTIVEC void enable_kernel_altivec(void) { @@ -148,36 +138,48 @@ void flush_altivec_to_thread(struct task_struct *tsk) preempt_enable(); } } +#endif /* CONFIG_ALTIVEC */ -int dump_task_altivec(struct task_struct *tsk, elf_vrregset_t *vrregs) +#ifdef CONFIG_VSX +#if 0 +/* not currently used, but some crazy RAID module might want to later */ +void enable_kernel_vsx(void) { - /* ELF_NVRREG includes the VSCR and VRSAVE which we need to save - * separately, see below */ - const int nregs = ELF_NVRREG - 2; - elf_vrreg_t *reg; - u32 *dest; - - if (tsk == current) - flush_altivec_to_thread(tsk); - - reg = (elf_vrreg_t *)vrregs; - - /* copy the 32 vr registers */ - memcpy(reg, &tsk->thread.vr[0], nregs * sizeof(*reg)); - reg += nregs; + WARN_ON(preemptible()); - /* copy the vscr */ - memcpy(reg, &tsk->thread.vscr, sizeof(*reg)); - reg++; +#ifdef CONFIG_SMP + if (current->thread.regs && (current->thread.regs->msr & MSR_VSX)) + giveup_vsx(current); + else + giveup_vsx(NULL); /* just enable vsx for kernel - force */ +#else + giveup_vsx(last_task_used_vsx); +#endif /* CONFIG_SMP */ +} +EXPORT_SYMBOL(enable_kernel_vsx); +#endif - /* vrsave is stored in the high 32bit slot of the final 128bits */ - memset(reg, 0, sizeof(*reg)); - dest = (u32 *)reg; - *dest = tsk->thread.vrsave; +void giveup_vsx(struct task_struct *tsk) +{ + giveup_fpu(tsk); + giveup_altivec(tsk); + __giveup_vsx(tsk); +} - return 1; +void flush_vsx_to_thread(struct task_struct *tsk) +{ + if (tsk->thread.regs) { + preempt_disable(); + if (tsk->thread.regs->msr & MSR_VSX) { +#ifdef CONFIG_SMP + BUG_ON(tsk != current); +#endif + giveup_vsx(tsk); + } + preempt_enable(); + } } -#endif /* CONFIG_ALTIVEC */ +#endif /* CONFIG_VSX */ #ifdef CONFIG_SPE @@ -209,14 +211,6 @@ void flush_spe_to_thread(struct task_struct *tsk) preempt_enable(); } } - -int dump_spe(struct pt_regs *regs, elf_vrregset_t *evrregs) -{ - flush_spe_to_thread(current); - /* We copy u32 evr[32] + u64 acc + u32 spefscr -> 35 */ - memcpy(evrregs, ¤t->thread.evr[0], sizeof(u32) * 35); - return 1; -} #endif /* CONFIG_SPE */ #ifndef CONFIG_SMP @@ -233,6 +227,10 @@ void discard_lazy_cpu_state(void) if (last_task_used_altivec == current) last_task_used_altivec = NULL; #endif /* CONFIG_ALTIVEC */ +#ifdef CONFIG_VSX + if (last_task_used_vsx == current) + last_task_used_vsx = NULL; +#endif /* CONFIG_VSX */ #ifdef CONFIG_SPE if (last_task_used_spe == current) last_task_used_spe = NULL; @@ -297,6 +295,11 @@ struct task_struct *__switch_to(struct task_struct *prev, if (prev->thread.regs && (prev->thread.regs->msr & MSR_VEC)) giveup_altivec(prev); #endif /* CONFIG_ALTIVEC */ +#ifdef CONFIG_VSX + if (prev->thread.regs && (prev->thread.regs->msr & MSR_VSX)) + /* VMX and FPU registers are already save here */ + __giveup_vsx(prev); +#endif /* CONFIG_VSX */ #ifdef CONFIG_SPE /* * If the previous thread used spe in the last quantum @@ -317,6 +320,10 @@ struct task_struct *__switch_to(struct task_struct *prev, if (new->thread.regs && last_task_used_altivec == new) new->thread.regs->msr |= MSR_VEC; #endif /* CONFIG_ALTIVEC */ +#ifdef CONFIG_VSX + if (new->thread.regs && last_task_used_vsx == new) + new->thread.regs->msr |= MSR_VSX; +#endif /* CONFIG_VSX */ #ifdef CONFIG_SPE /* Avoid the trap. On smp this this never happens since * we don't set last_task_used_spe @@ -417,6 +424,8 @@ static struct regbit { {MSR_EE, "EE"}, {MSR_PR, "PR"}, {MSR_FP, "FP"}, + {MSR_VEC, "VEC"}, + {MSR_VSX, "VSX"}, {MSR_ME, "ME"}, {MSR_IR, "IR"}, {MSR_DR, "DR"}, @@ -484,10 +493,8 @@ void show_regs(struct pt_regs * regs) * Lookup NIP late so we have the best change of getting the * above info out without failing */ - printk("NIP ["REG"] ", regs->nip); - print_symbol("%s\n", regs->nip); - printk("LR ["REG"] ", regs->link); - print_symbol("%s\n", regs->link); + printk("NIP ["REG"] %pS\n", regs->nip, (void *)regs->nip); + printk("LR ["REG"] %pS\n", regs->link, (void *)regs->link); #endif show_stack(current, (unsigned long *) regs->gpr[1]); if (!user_mode(regs)) @@ -534,6 +541,7 @@ void prepare_to_copy(struct task_struct *tsk) { flush_fp_to_thread(current); flush_altivec_to_thread(current); + flush_vsx_to_thread(current); flush_spe_to_thread(current); } @@ -689,6 +697,9 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) #endif discard_lazy_cpu_state(); +#ifdef CONFIG_VSX + current->thread.used_vsr = 0; +#endif memset(current->thread.fpr, 0, sizeof(current->thread.fpr)); current->thread.fpscr.val = 0; #ifdef CONFIG_ALTIVEC @@ -971,8 +982,7 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) newsp = stack[0]; ip = stack[STACK_FRAME_LR_SAVE]; if (!firstframe || ip != lr) { - printk("["REG"] ["REG"] ", sp, ip); - print_symbol("%s", ip); + printk("["REG"] ["REG"] %pS", sp, ip, (void *)ip); if (firstframe) printk(" (unreliable)"); printk("\n"); @@ -987,10 +997,9 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) { struct pt_regs *regs = (struct pt_regs *) (sp + STACK_FRAME_OVERHEAD); - printk("--- Exception: %lx", regs->trap); - print_symbol(" at %s\n", regs->nip); lr = regs->link; - print_symbol(" LR = %s\n", lr); + printk("--- Exception: %lx at %pS\n LR = %pS\n", + regs->trap, (void *)regs->nip, (void *)lr); firstframe = 1; } |