Eli Cooper a78ff11122 um: add extended processor state save/restore support ... This patch extends save_fp_registers() and restore_fp_registers() to use PTRACE_GETREGSET and PTRACE_SETREGSET with the XSTATE note type, adding support for new processor state extensions between context switches. When the new ptrace requests are unavailable, it falls back to the old PTRACE_GETFPREGS and PTRACE_SETFPREGS methods, which have been renamed to save_i387_registers() and restore_i387_registers(). Now these functions expect *fp_regs to have the space of an _xstate struct. Thus, this also makes ptrace in UML responde to PTRACE_GETFPREGS/_SETFPREG requests with a user_i387_struct (thus independent from HOST_FP_SIZE), and by calling save_i387_registers() and restore_i387_registers() instead of the extended save_fp_registers() and restore_fp_registers() functions. Signed-off-by: Eli Cooper <elicooper@gmx.com>		2016-05-21 23:38:06 +02:00
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asm	um, pkeys: Add UML arch_*_access_permitted() methods	2016-02-18 19:46:28 +01:00
shared	um: add extended processor state save/restore support	2016-05-21 23:38:06 +02:00