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Merge branch '3.16-fixes' into mips-for-linux-next

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This commit is contained in:
Ralf Baechle
2014-08-02 00:07:03 +02:00
parent c6b7b9f290 1062080a7d
commit 475d5928b7
15 changed files with 116 additions and 28 deletions
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56
arch/mips/kernel/ftrace.c
View File

@@ -63,7 +63,7 @@ static inline int in_kernel_space(unsigned long ip)
((unsigned int)(JAL | (((addr) >> 2) & ADDR_MASK)))
static unsigned int insn_jal_ftrace_caller __read_mostly;
static unsigned int insn_lui_v1_hi16_mcount __read_mostly;
static unsigned int insn_la_mcount[2] __read_mostly;
static unsigned int insn_j_ftrace_graph_caller __maybe_unused __read_mostly;
static inline void ftrace_dyn_arch_init_insns(void)
@@ -71,10 +71,10 @@ static inline void ftrace_dyn_arch_init_insns(void)
u32 *buf;
unsigned int v1;
/* lui v1, hi16_mcount */
/* la v1, _mcount */
v1 = 3;
buf = (u32 *)&insn_lui_v1_hi16_mcount;
UASM_i_LA_mostly(&buf, v1, MCOUNT_ADDR);
buf = (u32 *)&insn_la_mcount[0];
UASM_i_LA(&buf, v1, MCOUNT_ADDR);
/* jal (ftrace_caller + 8), jump over the first two instruction */
buf = (u32 *)&insn_jal_ftrace_caller;
@@ -111,14 +111,47 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
unsigned int new_code2)
{
int faulted;
mm_segment_t old_fs;
safe_store_code(new_code1, ip, faulted);
if (unlikely(faulted))
return -EFAULT;
safe_store_code(new_code2, ip + 4, faulted);
ip += 4;
safe_store_code(new_code2, ip, faulted);
if (unlikely(faulted))
return -EFAULT;
ip -= 4;
old_fs = get_fs();
set_fs(get_ds());
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
return 0;
}
static int ftrace_modify_code_2r(unsigned long ip, unsigned int new_code1,
unsigned int new_code2)
{
int faulted;
mm_segment_t old_fs;
ip += 4;
safe_store_code(new_code2, ip, faulted);
if (unlikely(faulted))
return -EFAULT;
ip -= 4;
safe_store_code(new_code1, ip, faulted);
if (unlikely(faulted))
return -EFAULT;
old_fs = get_fs();
set_fs(get_ds());
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
return 0;
}
#endif
@@ -130,13 +163,14 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
*
* move at, ra
* jal _mcount --> nop
* sub sp, sp, 8 --> nop (CONFIG_32BIT)
*
* 2. For modules:
*
* 2.1 For KBUILD_MCOUNT_RA_ADDRESS and CONFIG_32BIT
*
* lui v1, hi_16bit_of_mcount --> b 1f (0x10000005)
* addiu v1, v1, low_16bit_of_mcount
* addiu v1, v1, low_16bit_of_mcount --> nop (CONFIG_32BIT)
* move at, ra
* move $12, ra_address
* jalr v1
@@ -145,7 +179,7 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
* 2.2 For the Other situations
*
* lui v1, hi_16bit_of_mcount --> b 1f (0x10000004)
* addiu v1, v1, low_16bit_of_mcount
* addiu v1, v1, low_16bit_of_mcount --> nop (CONFIG_32BIT)
* move at, ra
* jalr v1
* nop | move $12, ra_address | sub sp, sp, 8
@@ -184,10 +218,14 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
unsigned int new;
unsigned long ip = rec->ip;
new = in_kernel_space(ip) ? insn_jal_ftrace_caller :
insn_lui_v1_hi16_mcount;
new = in_kernel_space(ip) ? insn_jal_ftrace_caller : insn_la_mcount[0];
#ifdef CONFIG_64BIT
return ftrace_modify_code(ip, new);
#else
return ftrace_modify_code_2r(ip, new, in_kernel_space(ip) ?
INSN_NOP : insn_la_mcount[1]);
#endif
}
#define FTRACE_CALL_IP ((unsigned long)(&ftrace_call))

13
arch/mips/kernel/mcount.S
View File

@@ -84,6 +84,19 @@ _mcount:
#endif
PTR_SUBU a0, ra, 8 /* arg1: self address */
PTR_LA t1, _stext
sltu t2, a0, t1 /* t2 = (a0 < _stext) */
PTR_LA t1, _etext
sltu t3, t1, a0 /* t3 = (a0 > _etext) */
or t1, t2, t3
beqz t1, ftrace_call
nop
#if defined(KBUILD_MCOUNT_RA_ADDRESS) && defined(CONFIG_32BIT)
PTR_SUBU a0, a0, 16 /* arg1: adjust to module's recorded callsite */
#else
PTR_SUBU a0, a0, 12
#endif
.globl ftrace_call
ftrace_call:
nop /* a placeholder for the call to a real tracing function */

3
arch/mips/kernel/ptrace.c
View File

@@ -150,6 +150,7 @@ int ptrace_setfpregs(struct task_struct *child, __u32 __user *data)
}
__get_user(child->thread.fpu.fcr31, data + 64);
child->thread.fpu.fcr31 &= ~FPU_CSR_ALL_X;
/* FIR may not be written. */
@@ -695,7 +696,7 @@ long arch_ptrace(struct task_struct *child, long request,
break;
#endif
case FPC_CSR:
child->thread.fpu.fcr31 = data;
child->thread.fpu.fcr31 = data & ~FPU_CSR_ALL_X;
break;
case DSP_BASE ... DSP_BASE + 5: {
dspreg_t *dregs;

3
arch/mips/kernel/rtlx-cmp.c
View File

@@ -77,6 +77,9 @@ int __init rtlx_module_init(void)
dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
"%s%d", RTLX_MODULE_NAME, i);
if (IS_ERR(dev)) {
while (i--)
device_destroy(mt_class, MKDEV(major, i));
err = PTR_ERR(dev);
goto out_chrdev;
}

3
arch/mips/kernel/rtlx-mt.c
View File

@@ -103,6 +103,9 @@ int __init rtlx_module_init(void)
dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
"%s%d", RTLX_MODULE_NAME, i);
if (IS_ERR(dev)) {
while (i--)
device_destroy(mt_class, MKDEV(major, i));
err = PTR_ERR(dev);
goto out_chrdev;
}

2
arch/mips/kernel/scall64-n32.S
View File

@@ -162,7 +162,7 @@ EXPORT(sysn32_call_table)
PTR sys_getpeername
PTR sys_socketpair
PTR compat_sys_setsockopt
PTR sys_getsockopt
PTR compat_sys_getsockopt
PTR __sys_clone /* 6055 */
PTR __sys_fork
PTR compat_sys_execve

2
arch/mips/kernel/smp-mt.c
View File

@@ -288,6 +288,7 @@ struct plat_smp_ops vsmp_smp_ops = {
.prepare_cpus = vsmp_prepare_cpus,
};
#ifdef CONFIG_PROC_FS
static int proc_cpuinfo_chain_call(struct notifier_block *nfb,
unsigned long action_unused, void *data)
{
@@ -309,3 +310,4 @@ static int __init proc_cpuinfo_notifier_init(void)
}
subsys_initcall(proc_cpuinfo_notifier_init);
#endif

1
arch/mips/kernel/unaligned.c
View File

@@ -690,7 +690,6 @@ static void emulate_load_store_insn(struct pt_regs *regs,
case sdc1_op:
die_if_kernel("Unaligned FP access in kernel code", regs);
BUG_ON(!used_math());
BUG_ON(!is_fpu_owner());
lose_fpu(1); /* Save FPU state for the emulator. */
res = fpu_emulator_cop1Handler(regs, &current->thread.fpu, 1,