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powerpc/ptrace: Add memory protection key regset

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The AMR/IAMR/UAMOR are part of the program context.
Allow it to be accessed via ptrace and through core files.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Thiago Jung Bauermann
2018-01-18 17:50:43 -08:00
committed by Michael Ellerman
parent 99cd130232
commit c5cc1f4df6
5 changed files with 80 additions and 0 deletions
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5
arch/powerpc/include/asm/pkeys.h
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@@ -202,6 +202,11 @@ static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
return __arch_set_user_pkey_access(tsk, pkey, init_val);
}
static inline bool arch_pkeys_enabled(void)
{
return !static_branch_likely(&pkey_disabled);
}
extern void pkey_mm_init(struct mm_struct *mm);
extern void thread_pkey_regs_save(struct thread_struct *thread);
extern void thread_pkey_regs_restore(struct thread_struct *new_thread,