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Commit a1f15826 authored by Paul Mackerras's avatar Paul Mackerras
Browse files

KVM: PPC: Book3S HV: Add 'online' register to ONE_REG interface 



This adds a new KVM_REG_PPC_ONLINE register which userspace can set
to 0 or 1 via the GET/SET_ONE_REG interface to indicate whether it
considers the VCPU to be offline (0), that is, not currently running,
or online (1).  This will be used in a later patch to configure the
register which controls PURR and SPURR accumulation.

Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent df158189

arch/powerpc/include/asm/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -772,6 +772,8 @@ struct kvm_vcpu_arch { 
	u64 busy_preempt;



	u32 emul_inst;



	u32 online;

#endif



#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING

arch/powerpc/include/uapi/asm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -633,6 +633,7 @@ struct kvm_ppc_cpu_char { 
#define KVM_REG_PPC_PSSCR	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xbd)



#define KVM_REG_PPC_DEC_EXPIRY	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xbe)

#define KVM_REG_PPC_ONLINE	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xbf)



/* Transactional Memory checkpointed state:

 * This is all GPRs, all VSX regs and a subset of SPRs

arch/powerpc/kvm/book3s_hv.c

+6 −0
Original line number Diff line number Diff line
@@ -1526,6 +1526,9 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, 
		*val = get_reg_val(id, vcpu->arch.dec_expires +

				   vcpu->arch.vcore->tb_offset);

		break;

	case KVM_REG_PPC_ONLINE:

		*val = get_reg_val(id, vcpu->arch.online);

		break;

	default:

		r = -EINVAL;

		break;
@@ -1757,6 +1760,9 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, 
		vcpu->arch.dec_expires = set_reg_val(id, *val) -

			vcpu->arch.vcore->tb_offset;

		break;

	case KVM_REG_PPC_ONLINE:

		vcpu->arch.online = set_reg_val(id, *val);

		break;

	default:

		r = -EINVAL;

		break;