diff options
| author | Paul Mackerras <paulus@samba.org> | 2013-09-06 13:18:32 +1000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-10-17 14:44:59 +0200 |
| commit | c0867fd50943d71d9f0bc5078393ce4ec76b3923 (patch) | |
| tree | e8ff5805ef9e9ad775467fe3912361c48e1c84cd | |
| parent | 93b0f4dc29c5f077a1c97bd1d484147230c3779a (diff) | |
KVM: PPC: Book3S: Add GET/SET_ONE_REG interface for VRSAVE
The VRSAVE register value for a vcpu is accessible through the
GET/SET_SREGS interface for Book E processors, but not for Book 3S
processors. In order to make this accessible for Book 3S processors,
this adds a new register identifier for GET/SET_ONE_REG, and adds
the code to implement it.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/uapi/asm/kvm.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 10 |
3 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index e43c6f14c225..26fc37355dcb 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1834,6 +1834,7 @@ registers, find a list below: PPC | KVM_REG_PPC_TCSCR | 64 PPC | KVM_REG_PPC_PID | 64 PPC | KVM_REG_PPC_ACOP | 64 + PPC | KVM_REG_PPC_VRSAVE | 32 PPC | KVM_REG_PPC_TM_GPR0 | 64 ... PPC | KVM_REG_PPC_TM_GPR31 | 64 diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index a8124fe93fb9..b98bf3f50527 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -532,6 +532,8 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_PID (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb2) #define KVM_REG_PPC_ACOP (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb3) +#define KVM_REG_PPC_VRSAVE (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xb4) + /* Transactional Memory checkpointed state: * This is all GPRs, all VSX regs and a subset of SPRs */ diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 700df6f1d32c..f97369dc457c 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -528,6 +528,9 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) } val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]); break; + case KVM_REG_PPC_VRSAVE: + val = get_reg_val(reg->id, vcpu->arch.vrsave); + break; #endif /* CONFIG_ALTIVEC */ case KVM_REG_PPC_DEBUG_INST: { u32 opcode = INS_TW; @@ -605,6 +608,13 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) } vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val); break; + case KVM_REG_PPC_VRSAVE: + if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { + r = -ENXIO; + break; + } + vcpu->arch.vrsave = set_reg_val(reg->id, val); + break; #endif /* CONFIG_ALTIVEC */ #ifdef CONFIG_KVM_XICS case KVM_REG_PPC_ICP_STATE: |