Commit 21bd000a authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Alexander Graf
Browse files

KVM: PPC: booke: Added DECAR support 



Added the decrementer auto-reload support. DECAR is readable
on e500v2/e500mc and later cpus.

Signed-off-by: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 32fad281

arch/powerpc/include/asm/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -418,7 +418,9 @@ struct kvm_vcpu_arch { 
	ulong mcsrr1;

	ulong mcsr;

	u32 dec;

#ifdef CONFIG_BOOKE

	u32 decar;

#endif

	u32 tbl;

	u32 tbu;

	u32 tcr;

arch/powerpc/kvm/booke.c

+5 −0
Original line number Diff line number Diff line
@@ -1267,6 +1267,11 @@ void kvmppc_decrementer_func(unsigned long data) 
{

	struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;



	if (vcpu->arch.tcr & TCR_ARE) {

		vcpu->arch.dec = vcpu->arch.decar;

		kvmppc_emulate_dec(vcpu);

	}



	kvmppc_set_tsr_bits(vcpu, TSR_DIS);

}

arch/powerpc/kvm/booke_emulate.c

+3 −0
Original line number Diff line number Diff line
@@ -129,6 +129,9 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) 
		kvmppc_set_tcr(vcpu, spr_val);

		break;



	case SPRN_DECAR:

		vcpu->arch.decar = spr_val;

		break;

	/*

	 * Note: SPRG4-7 are user-readable.

	 * These values are loaded into the real SPRGs when resuming the

arch/powerpc/kvm/e500_emulate.c

+3 −0
Original line number Diff line number Diff line
@@ -269,6 +269,9 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) 
		*spr_val = vcpu->arch.shared->mas7_3 >> 32;

		break;

#endif

	case SPRN_DECAR:

		*spr_val = vcpu->arch.decar;

		break;

	case SPRN_TLB0CFG:

		*spr_val = vcpu->arch.tlbcfg[0];

		break;