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

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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: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Paul Mackerras 2018-04-20 15:33:21 +10:00
parent df158189db
commit a1f158262a
3 changed files with 9 additions and 0 deletions
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2
arch/powerpc/include/asm/kvm_host.h
View File

@ -772,6 +772,8 @@ struct kvm_vcpu_arch {
u64 busy_preempt;
u32 emul_inst;
u32 online;
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING

1
arch/powerpc/include/uapi/asm/kvm.h
View File

@ -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

6
arch/powerpc/kvm/book3s_hv.c
View File

@ -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;