mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
powerpc/ptrace: Enable support for NT_PPC_CFPR
This patch enables support for TM checkpointed FPR register set ELF core note NT_PPC_CFPR based ptrace requests through PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved through adding a register set REGSET_CFPR in powerpc corresponding to the ELF core note section added. It implements the get, set and active functions for this new register set added. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
parent
25847fb195
commit
19cbcbf75a
1 changed files with 126 additions and 0 deletions
|
@ -1032,6 +1032,121 @@ static int tm_cgpr_set(struct task_struct *target,
|
||||||
|
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* tm_cfpr_active - get active number of registers in CFPR
|
||||||
|
* @target: The target task.
|
||||||
|
* @regset: The user regset structure.
|
||||||
|
*
|
||||||
|
* This function checks for the active number of available
|
||||||
|
* regisers in transaction checkpointed FPR category.
|
||||||
|
*/
|
||||||
|
static int tm_cfpr_active(struct task_struct *target,
|
||||||
|
const struct user_regset *regset)
|
||||||
|
{
|
||||||
|
if (!cpu_has_feature(CPU_FTR_TM))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
if (!MSR_TM_ACTIVE(target->thread.regs->msr))
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
return regset->n;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* tm_cfpr_get - get CFPR registers
|
||||||
|
* @target: The target task.
|
||||||
|
* @regset: The user regset structure.
|
||||||
|
* @pos: The buffer position.
|
||||||
|
* @count: Number of bytes to copy.
|
||||||
|
* @kbuf: Kernel buffer to copy from.
|
||||||
|
* @ubuf: User buffer to copy into.
|
||||||
|
*
|
||||||
|
* This function gets in transaction checkpointed FPR registers.
|
||||||
|
*
|
||||||
|
* When the transaction is active 'fp_state' holds the checkpointed
|
||||||
|
* values for the current transaction to fall back on if it aborts
|
||||||
|
* in between. This function gets those checkpointed FPR registers.
|
||||||
|
* The userspace interface buffer layout is as follows.
|
||||||
|
*
|
||||||
|
* struct data {
|
||||||
|
* u64 fpr[32];
|
||||||
|
* u64 fpscr;
|
||||||
|
*};
|
||||||
|
*/
|
||||||
|
static int tm_cfpr_get(struct task_struct *target,
|
||||||
|
const struct user_regset *regset,
|
||||||
|
unsigned int pos, unsigned int count,
|
||||||
|
void *kbuf, void __user *ubuf)
|
||||||
|
{
|
||||||
|
u64 buf[33];
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (!cpu_has_feature(CPU_FTR_TM))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
if (!MSR_TM_ACTIVE(target->thread.regs->msr))
|
||||||
|
return -ENODATA;
|
||||||
|
|
||||||
|
flush_fp_to_thread(target);
|
||||||
|
flush_altivec_to_thread(target);
|
||||||
|
flush_tmregs_to_thread(target);
|
||||||
|
|
||||||
|
/* copy to local buffer then write that out */
|
||||||
|
for (i = 0; i < 32 ; i++)
|
||||||
|
buf[i] = target->thread.TS_FPR(i);
|
||||||
|
buf[32] = target->thread.fp_state.fpscr;
|
||||||
|
return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* tm_cfpr_set - set CFPR registers
|
||||||
|
* @target: The target task.
|
||||||
|
* @regset: The user regset structure.
|
||||||
|
* @pos: The buffer position.
|
||||||
|
* @count: Number of bytes to copy.
|
||||||
|
* @kbuf: Kernel buffer to copy into.
|
||||||
|
* @ubuf: User buffer to copy from.
|
||||||
|
*
|
||||||
|
* This function sets in transaction checkpointed FPR registers.
|
||||||
|
*
|
||||||
|
* When the transaction is active 'fp_state' holds the checkpointed
|
||||||
|
* FPR register values for the current transaction to fall back on
|
||||||
|
* if it aborts in between. This function sets these checkpointed
|
||||||
|
* FPR registers. The userspace interface buffer layout is as follows.
|
||||||
|
*
|
||||||
|
* struct data {
|
||||||
|
* u64 fpr[32];
|
||||||
|
* u64 fpscr;
|
||||||
|
*};
|
||||||
|
*/
|
||||||
|
static int tm_cfpr_set(struct task_struct *target,
|
||||||
|
const struct user_regset *regset,
|
||||||
|
unsigned int pos, unsigned int count,
|
||||||
|
const void *kbuf, const void __user *ubuf)
|
||||||
|
{
|
||||||
|
u64 buf[33];
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (!cpu_has_feature(CPU_FTR_TM))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
if (!MSR_TM_ACTIVE(target->thread.regs->msr))
|
||||||
|
return -ENODATA;
|
||||||
|
|
||||||
|
flush_fp_to_thread(target);
|
||||||
|
flush_altivec_to_thread(target);
|
||||||
|
flush_tmregs_to_thread(target);
|
||||||
|
|
||||||
|
/* copy to local buffer then write that out */
|
||||||
|
i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
|
||||||
|
if (i)
|
||||||
|
return i;
|
||||||
|
for (i = 0; i < 32 ; i++)
|
||||||
|
target->thread.TS_FPR(i) = buf[i];
|
||||||
|
target->thread.fp_state.fpscr = buf[32];
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -1051,6 +1166,7 @@ enum powerpc_regset {
|
||||||
#endif
|
#endif
|
||||||
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
|
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
|
||||||
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
|
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
|
||||||
|
REGSET_TM_CFPR, /* TM checkpointed FPR registers */
|
||||||
#endif
|
#endif
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -1092,6 +1208,11 @@ static const struct user_regset native_regsets[] = {
|
||||||
.size = sizeof(long), .align = sizeof(long),
|
.size = sizeof(long), .align = sizeof(long),
|
||||||
.active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
|
.active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
|
||||||
},
|
},
|
||||||
|
[REGSET_TM_CFPR] = {
|
||||||
|
.core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
|
||||||
|
.size = sizeof(double), .align = sizeof(double),
|
||||||
|
.active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
|
||||||
|
},
|
||||||
#endif
|
#endif
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -1324,6 +1445,11 @@ static const struct user_regset compat_regsets[] = {
|
||||||
.active = tm_cgpr_active,
|
.active = tm_cgpr_active,
|
||||||
.get = tm_cgpr32_get, .set = tm_cgpr32_set
|
.get = tm_cgpr32_get, .set = tm_cgpr32_set
|
||||||
},
|
},
|
||||||
|
[REGSET_TM_CFPR] = {
|
||||||
|
.core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
|
||||||
|
.size = sizeof(double), .align = sizeof(double),
|
||||||
|
.active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
|
||||||
|
},
|
||||||
#endif
|
#endif
|
||||||
};
|
};
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue