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Commit 5f4e87a2 authored by Heiko Carstens's avatar Heiko Carstens Committed by Christian Borntraeger
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s390/ctl_reg: add union type for control register 0 



Add 'union ctlreg0_bits' to easily allow setting and testing bits of
control register 0 bits.
This patch only adds the bits needed for the new guest access functions.
Other bits and control registers can be added when needed.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 1365632b

arch/s390/include/asm/ctl_reg.h

+14 −0
Original line number Diff line number Diff line
@@ -57,6 +57,20 @@ static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit) 
void smp_ctl_set_bit(int cr, int bit);

void smp_ctl_clear_bit(int cr, int bit);



union ctlreg0 {

	unsigned long val;

	struct {

#ifdef CONFIG_64BIT

		unsigned long	   : 32;

#endif

		unsigned long	   : 3;

		unsigned long lap  : 1; /* Low-address-protection control */

		unsigned long	   : 4;

		unsigned long edat : 1; /* Enhanced-DAT-enablement control */

		unsigned long	   : 23;

	};

};



#ifdef CONFIG_SMP

# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)

# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)