Re: [Qemu-devel] [PATCH v3] target/ppc/kvm: set vcpu as online/offline

[David Gibson <david@gibson.dropbear.id.au>]

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On Tue, Sep 04, 2018 at 02:54:18PM +0530, Nikunj A Dadhania wrote:
> Set the newly added register(KVM_REG_PPC_ONLINE) to indicate if the vcpu is
> online(1) or offline(0)
> 
> KVM will use this information to set the RWMR register, which controls the PURR
> and SPURR accumulation.
> 
> CC: paulus@samba.org
> Signed-off-by: Nikunj A Dadhania <nikunj@linux.ibm.com>

Merged to ppc-for-3.1, thanks.

> ---
>  hw/ppc/spapr_cpu_core.c | 1 +
>  hw/ppc/spapr_rtas.c     | 2 ++
>  target/ppc/kvm.c        | 9 +++++++++
>  target/ppc/kvm_ppc.h    | 7 +++++++
>  4 files changed, 19 insertions(+)
> 
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index 876f0b3d9d..9863221756 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -90,6 +90,7 @@ void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip, target_ulong r
>  
>      env->nip = nip;
>      env->gpr[3] = r3;
> +    kvmppc_set_reg_ppc_online(cpu, 1);
>      CPU(cpu)->halted = 0;
>      /* Enable Power-saving mode Exit Cause exceptions */
>      ppc_store_lpcr(cpu, env->spr[SPR_LPCR] | pcc->lpcr_pm);
> diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
> index 4ac96bc94b..d6a0952154 100644
> --- a/hw/ppc/spapr_rtas.c
> +++ b/hw/ppc/spapr_rtas.c
> @@ -33,6 +33,7 @@
>  #include "sysemu/device_tree.h"
>  #include "sysemu/cpus.h"
>  #include "sysemu/hw_accel.h"
> +#include "kvm_ppc.h"
>  
>  #include "hw/ppc/spapr.h"
>  #include "hw/ppc/spapr_vio.h"
> @@ -207,6 +208,7 @@ static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr,
>       * guest */
>      ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
>      cs->halted = 1;
> +    kvmppc_set_reg_ppc_online(cpu, 0);
>      qemu_cpu_kick(cs);
>  }
>  
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index 9211ee2ee1..7be8081968 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -2785,3 +2785,12 @@ bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu)
>  
>      return !kvmppc_is_pr(cs->kvm_state);
>  }
> +
> +void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online)
> +{
> +    CPUState *cs = CPU(cpu);
> +
> +    if (kvm_enabled()) {
> +        kvm_set_one_reg(cs, KVM_REG_PPC_ONLINE, &online);
> +    }
> +}
> diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h
> index 657582bb32..f696c6e498 100644
> --- a/target/ppc/kvm_ppc.h
> +++ b/target/ppc/kvm_ppc.h
> @@ -72,6 +72,7 @@ bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu);
>  
>  bool kvmppc_hpt_needs_host_contiguous_pages(void);
>  void kvm_check_mmu(PowerPCCPU *cpu, Error **errp);
> +void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online);
>  
>  #else
>  
> @@ -187,6 +188,12 @@ static inline target_ulong kvmppc_configure_v3_mmu(PowerPCCPU *cpu,
>      return 0;
>  }
>  
> +static inline void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu,
> +                                             unsigned int online)
> +{
> +    return;
> +}
> +
>  #ifndef CONFIG_USER_ONLY
>  static inline bool kvmppc_spapr_use_multitce(void)
>  {

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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