Commit 1b422dd7 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Introduce accessor for ctxt->sys_reg 



In order to allow the disintegration of the per-vcpu sysreg array,
let's introduce a new helper (ctxt_sys_reg()) that returns the
in-memory copy of a system register, picked from a given context.

__vcpu_sys_reg() is rewritten to use this helper.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent efaa5b93

arch/arm64/include/asm/kvm_host.h

+10 −5
Original line number Diff line number Diff line
@@ -405,12 +405,17 @@ struct kvm_vcpu_arch { 
#define vcpu_gp_regs(v)		(&(v)->arch.ctxt.gp_regs)



/*

 * Only use __vcpu_sys_reg if you know you want the memory backed version of a

 * register, and not the one most recently accessed by a running VCPU.  For

 * example, for userspace access or for system registers that are never context

 * switched, but only emulated.

 * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the

 * memory backed version of a register, and not the one most recently

 * accessed by a running VCPU.  For example, for userspace access or

 * for system registers that are never context switched, but only

 * emulated.

 */

#define __vcpu_sys_reg(v,r)	((v)->arch.ctxt.sys_regs[(r)])

#define __ctxt_sys_reg(c,r)	(&(c)->sys_regs[(r)])



#define ctxt_sys_reg(c,r)	(*__ctxt_sys_reg(c,r))



#define __vcpu_sys_reg(v,r)	(ctxt_sys_reg(&(v)->arch.ctxt, (r)))



u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg);

void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);