Commit 6ed6750f authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Add AArch32 mapping annotation 



In order to deal with the few AArch32 system registers that map to
only a particular half of their AArch64 counterpart (such as DFAR
and IFAR being colocated in FAR_EL1), let's add an optional annotation
to the sysreg descriptor structure, indicating whether a register
maps to the upper or lower 32bits of a register.

Nothing is using these annotation yet.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 4ff3fc31

arch/arm64/kvm/sys_regs.h

+7 −0
Original line number Diff line number Diff line
@@ -27,6 +27,12 @@ struct sys_reg_desc { 
	/* Sysreg string for debug */

	const char *name;



	enum {

		AA32_ZEROHIGH,

		AA32_LO,

		AA32_HI,

	} aarch32_map;



	/* MRS/MSR instruction which accesses it. */

	u8	Op0;

	u8	Op1;
@@ -153,6 +159,7 @@ const struct sys_reg_desc *find_reg_by_id(u64 id, 
					  const struct sys_reg_desc table[],

					  unsigned int num);



#define AA32(_x)	.aarch32_map = AA32_##_x

#define Op0(_x) 	.Op0 = _x

#define Op1(_x) 	.Op1 = _x

#define CRn(_x)		.CRn = _x