diff options
Diffstat (limited to 'arch/nios2')
| -rw-r--r-- | arch/nios2/include/asm/checksum.h | 5 | ||||
| -rw-r--r-- | arch/nios2/include/asm/pgalloc.h | 7 | ||||
| -rw-r--r-- | arch/nios2/include/asm/uaccess.h | 2 | ||||
| -rw-r--r-- | arch/nios2/kernel/entry.S | 7 | ||||
| -rw-r--r-- | arch/nios2/kernel/process.c | 25 | ||||
| -rw-r--r-- | arch/nios2/kernel/ptrace.c | 51 | ||||
| -rw-r--r-- | arch/nios2/mm/fault.c | 14 |
7 files changed, 41 insertions, 70 deletions
diff --git a/arch/nios2/include/asm/checksum.h b/arch/nios2/include/asm/checksum.h index ec39698d3bea..b4316c361729 100644 --- a/arch/nios2/include/asm/checksum.h +++ b/arch/nios2/include/asm/checksum.h @@ -12,10 +12,9 @@ /* Take these from lib/checksum.c */ extern __wsum csum_partial(const void *buff, int len, __wsum sum); -extern __wsum csum_partial_copy(const void *src, void *dst, int len, +__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum); -#define csum_partial_copy_nocheck(src, dst, len, sum) \ - csum_partial_copy((src), (dst), (len), (sum)) +#define csum_partial_copy_nocheck csum_partial_copy_nocheck extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); extern __sum16 ip_compute_csum(const void *buff, int len); diff --git a/arch/nios2/include/asm/pgalloc.h b/arch/nios2/include/asm/pgalloc.h index 0b146d773c85..e6600d2a5ae0 100644 --- a/arch/nios2/include/asm/pgalloc.h +++ b/arch/nios2/include/asm/pgalloc.h @@ -12,7 +12,7 @@ #include <linux/mm.h> -#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ +#include <asm-generic/pgalloc.h> static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) @@ -34,11 +34,6 @@ extern void pmd_init(unsigned long page, unsigned long pagetable); extern pgd_t *pgd_alloc(struct mm_struct *mm); -static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) -{ - free_pages((unsigned long)pgd, PGD_ORDER); -} - #define __pte_free_tlb(tlb, pte, addr) \ do { \ pgtable_pte_page_dtor(pte); \ diff --git a/arch/nios2/include/asm/uaccess.h b/arch/nios2/include/asm/uaccess.h index e83f831a76f9..a741abbed6fb 100644 --- a/arch/nios2/include/asm/uaccess.h +++ b/arch/nios2/include/asm/uaccess.h @@ -30,7 +30,7 @@ #define get_fs() (current_thread_info()->addr_limit) #define set_fs(seg) (current_thread_info()->addr_limit = (seg)) -#define segment_eq(a, b) ((a).seg == (b).seg) +#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg) #define __access_ok(addr, len) \ (((signed long)(((long)get_fs().seg) & \ diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 3d8d1d0bcb64..da8442450e46 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -389,12 +389,7 @@ ENTRY(ret_from_interrupt) */ ENTRY(sys_clone) SAVE_SWITCH_STACK - addi sp, sp, -4 - stw r7, 0(sp) /* Pass 5th arg thru stack */ - mov r7, r6 /* 4th arg is 3rd of clone() */ - mov r6, zero /* 3rd arg always 0 */ - call do_fork - addi sp, sp, 4 + call nios2_clone RESTORE_SWITCH_STACK ret diff --git a/arch/nios2/kernel/process.c b/arch/nios2/kernel/process.c index 509e7855e8dc..88a4ec03edab 100644 --- a/arch/nios2/kernel/process.c +++ b/arch/nios2/kernel/process.c @@ -100,8 +100,8 @@ void flush_thread(void) { } -int copy_thread(unsigned long clone_flags, - unsigned long usp, unsigned long arg, struct task_struct *p) +int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, + struct task_struct *p, unsigned long tls) { struct pt_regs *childregs = task_pt_regs(p); struct pt_regs *regs; @@ -140,7 +140,7 @@ int copy_thread(unsigned long clone_flags, /* Initialize tls register. */ if (clone_flags & CLONE_SETTLS) - childstack->r23 = regs->r8; + childstack->r23 = tls; return 0; } @@ -252,10 +252,19 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) regs->sp = sp; } -#include <linux/elfcore.h> - -/* Fill in the FPU structure for a core dump. */ -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r) +asmlinkage int nios2_clone(unsigned long clone_flags, unsigned long newsp, + int __user *parent_tidptr, int __user *child_tidptr, + unsigned long tls) { - return 0; /* Nios2 has no FPU and thus no FPU registers */ + struct kernel_clone_args args = { + .flags = (lower_32_bits(clone_flags) & ~CSIGNAL), + .pidfd = parent_tidptr, + .child_tid = child_tidptr, + .parent_tid = parent_tidptr, + .exit_signal = (lower_32_bits(clone_flags) & CSIGNAL), + .stack = newsp, + .tls = tls, + }; + + return _do_fork(&args); } diff --git a/arch/nios2/kernel/ptrace.c b/arch/nios2/kernel/ptrace.c index de97bcb7dd44..a6ea9e1b4f61 100644 --- a/arch/nios2/kernel/ptrace.c +++ b/arch/nios2/kernel/ptrace.c @@ -21,45 +21,24 @@ static int genregs_get(struct task_struct *target, const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) + struct membuf to) { const struct pt_regs *regs = task_pt_regs(target); const struct switch_stack *sw = (struct switch_stack *)regs - 1; - int ret = 0; - -#define REG_O_ZERO_RANGE(START, END) \ - if (!ret) \ - ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, \ - START * 4, (END * 4) + 4); - -#define REG_O_ONE(PTR, LOC) \ - if (!ret) \ - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \ - LOC * 4, (LOC * 4) + 4); -#define REG_O_RANGE(PTR, START, END) \ - if (!ret) \ - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \ - START * 4, (END * 4) + 4); - - REG_O_ZERO_RANGE(PTR_R0, PTR_R0); - REG_O_RANGE(®s->r1, PTR_R1, PTR_R7); - REG_O_RANGE(®s->r8, PTR_R8, PTR_R15); - REG_O_RANGE(sw, PTR_R16, PTR_R23); - REG_O_ZERO_RANGE(PTR_R24, PTR_R25); /* et and bt */ - REG_O_ONE(®s->gp, PTR_GP); - REG_O_ONE(®s->sp, PTR_SP); - REG_O_ONE(®s->fp, PTR_FP); - REG_O_ONE(®s->ea, PTR_EA); - REG_O_ZERO_RANGE(PTR_BA, PTR_BA); - REG_O_ONE(®s->ra, PTR_RA); - REG_O_ONE(®s->ea, PTR_PC); /* use ea for PC */ - if (!ret) - ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, - PTR_STATUS * 4, -1); - - return ret; + membuf_zero(&to, 4); // R0 + membuf_write(&to, ®s->r1, 7 * 4); // R1..R7 + membuf_write(&to, ®s->r8, 8 * 4); // R8..R15 + membuf_write(&to, sw, 8 * 4); // R16..R23 + membuf_zero(&to, 2 * 4); /* et and bt */ + membuf_store(&to, regs->gp); + membuf_store(&to, regs->sp); + membuf_store(&to, regs->fp); + membuf_store(&to, regs->ea); + membuf_zero(&to, 4); // PTR_BA + membuf_store(&to, regs->ra); + membuf_store(&to, regs->ea); /* use ea for PC */ + return membuf_zero(&to, (NUM_PTRACE_REG - PTR_PC) * 4); } /* @@ -121,7 +100,7 @@ static const struct user_regset nios2_regsets[] = { .n = NUM_PTRACE_REG, .size = sizeof(unsigned long), .align = sizeof(unsigned long), - .get = genregs_get, + .regset_get = genregs_get, .set = genregs_set, } }; diff --git a/arch/nios2/mm/fault.c b/arch/nios2/mm/fault.c index 4112ef0e247e..9476feecf512 100644 --- a/arch/nios2/mm/fault.c +++ b/arch/nios2/mm/fault.c @@ -24,6 +24,7 @@ #include <linux/mm.h> #include <linux/extable.h> #include <linux/uaccess.h> +#include <linux/perf_event.h> #include <asm/mmu_context.h> #include <asm/traps.h> @@ -83,6 +84,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause, if (user_mode(regs)) flags |= FAULT_FLAG_USER; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); + if (!mmap_read_trylock(mm)) { if (!user_mode(regs) && !search_exception_tables(regs->ea)) goto bad_area_nosemaphore; @@ -131,7 +134,7 @@ good_area: * make sure we exit gracefully rather than endlessly redo * the fault. */ - fault = handle_mm_fault(vma, address, flags); + fault = handle_mm_fault(vma, address, flags, regs); if (fault_signal_pending(fault, regs)) return; @@ -146,16 +149,7 @@ good_area: BUG(); } - /* - * Major/minor page fault accounting is only done on the - * initial attempt. If we go through a retry, it is extremely - * likely that the page will be found in page cache at that point. - */ if (flags & FAULT_FLAG_ALLOW_RETRY) { - if (fault & VM_FAULT_MAJOR) - current->maj_flt++; - else - current->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; |