diff options
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 49 |
1 files changed, 40 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 84f000a45e3..7949c203cb8 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -83,7 +83,7 @@ void flush_fp_to_thread(struct task_struct *tsk) */ BUG_ON(tsk != current); #endif - giveup_fpu(current); + giveup_fpu(tsk); } preempt_enable(); } @@ -143,7 +143,7 @@ void flush_altivec_to_thread(struct task_struct *tsk) #ifdef CONFIG_SMP BUG_ON(tsk != current); #endif - giveup_altivec(current); + giveup_altivec(tsk); } preempt_enable(); } @@ -182,7 +182,7 @@ void flush_spe_to_thread(struct task_struct *tsk) #ifdef CONFIG_SMP BUG_ON(tsk != current); #endif - giveup_spe(current); + giveup_spe(tsk); } preempt_enable(); } @@ -354,6 +354,14 @@ static void show_instructions(struct pt_regs *regs) if (!(i % 8)) printk("\n"); +#if !defined(CONFIG_BOOKE) + /* If executing with the IMMU off, adjust pc rather + * than print XXXXXXXX. + */ + if (!(regs->msr & MSR_IR)) + pc = (unsigned long)phys_to_virt(pc); +#endif + /* We use __get_user here *only* to avoid an OOPS on a * bad address because the pc *should* only be a * kernel address. @@ -423,7 +431,11 @@ void show_regs(struct pt_regs * regs) printk(" CR: %08lx XER: %08lx\n", regs->ccr, regs->xer); trap = TRAP(regs); if (trap == 0x300 || trap == 0x600) +#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) + printk("DEAR: "REG", ESR: "REG"\n", regs->dar, regs->dsisr); +#else printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr); +#endif printk("TASK = %p[%d] '%s' THREAD: %p", current, current->pid, current->comm, task_thread_info(current)); @@ -552,10 +564,15 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, #ifdef CONFIG_PPC64 if (cpu_has_feature(CPU_FTR_SLB)) { - unsigned long sp_vsid = get_kernel_vsid(sp); + unsigned long sp_vsid; unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp; - sp_vsid <<= SLB_VSID_SHIFT; + if (cpu_has_feature(CPU_FTR_1T_SEGMENT)) + sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_1T) + << SLB_VSID_SHIFT_1T; + else + sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_256M) + << SLB_VSID_SHIFT; sp_vsid |= SLB_VSID_KERNEL | llp; p->thread.ksp_vsid = sp_vsid; } @@ -601,6 +618,13 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) regs->ccr = 0; regs->gpr[1] = sp; + /* + * We have just cleared all the nonvolatile GPRs, so make + * FULL_REGS(regs) return true. This is necessary to allow + * ptrace to examine the thread immediately after exec. + */ + regs->trap &= ~1UL; + #ifdef CONFIG_PPC32 regs->mq = 0; regs->nip = start; @@ -665,9 +689,13 @@ int set_fpexc_mode(struct task_struct *tsk, unsigned int val) * mode (asyn, precise, disabled) for 'Classic' FP. */ if (val & PR_FP_EXC_SW_ENABLE) { #ifdef CONFIG_SPE - tsk->thread.fpexc_mode = val & - (PR_FP_EXC_SW_ENABLE | PR_FP_ALL_EXCEPT); - return 0; + if (cpu_has_feature(CPU_FTR_SPE)) { + tsk->thread.fpexc_mode = val & + (PR_FP_EXC_SW_ENABLE | PR_FP_ALL_EXCEPT); + return 0; + } else { + return -EINVAL; + } #else return -EINVAL; #endif @@ -693,7 +721,10 @@ int get_fpexc_mode(struct task_struct *tsk, unsigned long adr) if (tsk->thread.fpexc_mode & PR_FP_EXC_SW_ENABLE) #ifdef CONFIG_SPE - val = tsk->thread.fpexc_mode; + if (cpu_has_feature(CPU_FTR_SPE)) + val = tsk->thread.fpexc_mode; + else + return -EINVAL; #else return -EINVAL; #endif |