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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2014-06-05 17:38:05 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-07-28 15:22:10 +0200 |
| commit | 06da28e76b87331ebccdb6d486cfd94835b8be5e (patch) | |
| tree | 151e895b815cdb3f5b8039f41073052a615f9cd4 | |
| parent | 8f42ab2749d00ea15157ab896cfbed73a247b3e1 (diff) | |
| download | lwn-06da28e76b87331ebccdb6d486cfd94835b8be5e.tar.gz lwn-06da28e76b87331ebccdb6d486cfd94835b8be5e.zip | |
KVM: PPC: BOOK3S: PR: Emulate instruction counter
Writing to IC is not allowed in the privileged mode.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_emulate.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 4 |
5 files changed, 14 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index bd3caeaeebe1..f9ae69682ce1 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -506,6 +506,7 @@ struct kvm_vcpu_arch { /* Time base value when we entered the guest */ u64 entry_tb; u64 entry_vtb; + u64 entry_ic; u32 tcr; ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ u32 ivor[64]; diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index ddce1ea8ac4a..90aa5c750e08 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -649,6 +649,9 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) case KVM_REG_PPC_VTB: val = get_reg_val(reg->id, vcpu->arch.vtb); break; + case KVM_REG_PPC_IC: + val = get_reg_val(reg->id, vcpu->arch.ic); + break; default: r = -EINVAL; break; @@ -756,6 +759,9 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) case KVM_REG_PPC_VTB: vcpu->arch.vtb = set_reg_val(reg->id, val); break; + case KVM_REG_PPC_IC: + vcpu->arch.ic = set_reg_val(reg->id, val); + break; default: r = -EINVAL; break; diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c index 1bb16a59dcbc..84fddcd6c1f8 100644 --- a/arch/powerpc/kvm/book3s_emulate.c +++ b/arch/powerpc/kvm/book3s_emulate.c @@ -580,6 +580,9 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val case SPRN_VTB: *spr_val = vcpu->arch.vtb; break; + case SPRN_IC: + *spr_val = vcpu->arch.ic; + break; case SPRN_GQR0: case SPRN_GQR1: case SPRN_GQR2: diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 315e8849ecf3..1562acfa05bf 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -894,9 +894,6 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, case KVM_REG_PPC_CIABR: *val = get_reg_val(id, vcpu->arch.ciabr); break; - case KVM_REG_PPC_IC: - *val = get_reg_val(id, vcpu->arch.ic); - break; case KVM_REG_PPC_CSIGR: *val = get_reg_val(id, vcpu->arch.csigr); break; @@ -1091,9 +1088,6 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ break; - case KVM_REG_PPC_IC: - vcpu->arch.ic = set_reg_val(id, *val); - break; case KVM_REG_PPC_CSIGR: vcpu->arch.csigr = set_reg_val(id, *val); break; diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index d2deb9e45095..3da412e16b3a 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -126,6 +126,8 @@ void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu, */ vcpu->arch.entry_tb = get_tb(); vcpu->arch.entry_vtb = get_vtb(); + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + vcpu->arch.entry_ic = mfspr(SPRN_IC); svcpu->in_use = true; } @@ -178,6 +180,8 @@ void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu, vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb; vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb; vcpu->arch.vtb += get_vtb() - vcpu->arch.entry_vtb; + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic; svcpu->in_use = false; out: |