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KVM: PPC: Book3S PR: Expose EBB registers

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POWER8 introduces a new facility called the "Event Based Branch" facility.
It contains of a few registers that indicate where a guest should branch to
when a defined event occurs and it's in PR mode.

We don't want to really enable EBB as it will create a big mess with !PR guest
mode while hardware is in PR and we don't really emulate the PMU anyway.

So instead, let's just leave it at emulation of all its registers.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-04-29 13:36:21 +02:00
parent e14e7a1e53
commit 2e23f54413
3 changed files with 40 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
arch/powerpc/kvm/book3s.c
View file

@ -637,6 +637,15 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
case KVM_REG_PPC_TAR:
val = get_reg_val(reg->id, vcpu->arch.tar);
break;
case KVM_REG_PPC_EBBHR:
val = get_reg_val(reg->id, vcpu->arch.ebbhr);
break;
case KVM_REG_PPC_EBBRR:
val = get_reg_val(reg->id, vcpu->arch.ebbrr);
break;
case KVM_REG_PPC_BESCR:
val = get_reg_val(reg->id, vcpu->arch.bescr);
break;
default:
r = -EINVAL;
break;
@ -732,6 +741,15 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
case KVM_REG_PPC_TAR:
vcpu->arch.tar = set_reg_val(reg->id, val);
break;
case KVM_REG_PPC_EBBHR:
vcpu->arch.ebbhr = set_reg_val(reg->id, val);
break;
case KVM_REG_PPC_EBBRR:
vcpu->arch.ebbrr = set_reg_val(reg->id, val);
break;
case KVM_REG_PPC_BESCR:
vcpu->arch.bescr = set_reg_val(reg->id, val);
break;
default:
r = -EINVAL;
break;

22
arch/powerpc/kvm/book3s_emulate.c
View file

@ -441,6 +441,17 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
case SPRN_FSCR:
vcpu->arch.fscr = spr_val;
break;
#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_BESCR:
vcpu->arch.bescr = spr_val;
break;
case SPRN_EBBHR:
vcpu->arch.ebbhr = spr_val;
break;
case SPRN_EBBRR:
vcpu->arch.ebbrr = spr_val;
break;
#endif
case SPRN_ICTC:
case SPRN_THRM1:
case SPRN_THRM2:
@ -551,6 +562,17 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
case SPRN_FSCR:
*spr_val = vcpu->arch.fscr;
break;
#ifdef CONFIG_PPC_BOOK3S_64
case SPRN_BESCR:
*spr_val = vcpu->arch.bescr;
break;
case SPRN_EBBHR:
*spr_val = vcpu->arch.ebbhr;
break;
case SPRN_EBBRR:
*spr_val = vcpu->arch.ebbrr;
break;
#endif
case SPRN_THRM1:
case SPRN_THRM2:
case SPRN_THRM3:

18
arch/powerpc/kvm/book3s_hv.c
View file

@ -882,15 +882,6 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_PSPB:
*val = get_reg_val(id, vcpu->arch.pspb);
break;
case KVM_REG_PPC_EBBHR:
*val = get_reg_val(id, vcpu->arch.ebbhr);
break;
case KVM_REG_PPC_EBBRR:
*val = get_reg_val(id, vcpu->arch.ebbrr);
break;
case KVM_REG_PPC_BESCR:
*val = get_reg_val(id, vcpu->arch.bescr);
break;
case KVM_REG_PPC_DPDES:
*val = get_reg_val(id, vcpu->arch.vcore->dpdes);
break;
@ -1088,15 +1079,6 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_PSPB:
vcpu->arch.pspb = set_reg_val(id, *val);
break;
case KVM_REG_PPC_EBBHR:
vcpu->arch.ebbhr = set_reg_val(id, *val);
break;
case KVM_REG_PPC_EBBRR:
vcpu->arch.ebbrr = set_reg_val(id, *val);
break;
case KVM_REG_PPC_BESCR:
vcpu->arch.bescr = set_reg_val(id, *val);
break;
case KVM_REG_PPC_DPDES:
vcpu->arch.vcore->dpdes = set_reg_val(id, *val);
break;