Re: [Qemu-devel] [RFC PATCH v2 07/12] target-ppc: support KVM_CAP_PPC_MMU_RADIX, KVM_CAP_PPC_MMU_HASH_V3

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

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On Thu, Feb 23, 2017 at 05:00:00PM +1100, Sam Bobroff wrote:
> Query and cache the value of two new KVM capabilities that indicate
> KVM's support for new radix and hash modes of the MMU.
> 
> Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
> v2:
> 
> * cap_mmu_hash renamed to cap_mmu_hash_v3.
> 
>  target/ppc/kvm.c     | 14 ++++++++++++++
>  target/ppc/kvm_ppc.h | 12 ++++++++++++
>  2 files changed, 26 insertions(+)
> 
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index cf62a42c1f..8b153808fd 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -83,6 +83,8 @@ static int cap_papr;
>  static int cap_htab_fd;
>  static int cap_fixup_hcalls;
>  static int cap_htm;             /* Hardware transactional memory support */
> +static int cap_mmu_radix;
> +static int cap_mmu_hash_v3;
>  
>  static uint32_t debug_inst_opcode;
>  
> @@ -136,6 +138,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
>      cap_htab_fd = kvm_check_extension(s, KVM_CAP_PPC_HTAB_FD);
>      cap_fixup_hcalls = kvm_check_extension(s, KVM_CAP_PPC_FIXUP_HCALL);
>      cap_htm = kvm_vm_check_extension(s, KVM_CAP_PPC_HTM);
> +    cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX);
> +    cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3);
>  
>      if (!cap_interrupt_level) {
>          fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
> @@ -2430,6 +2434,16 @@ bool kvmppc_has_cap_htm(void)
>      return cap_htm;
>  }
>  
> +bool kvmppc_has_cap_mmu_radix(void)
> +{
> +    return cap_mmu_radix;
> +}
> +
> +bool kvmppc_has_cap_mmu_hash_v3(void)
> +{
> +    return cap_mmu_hash_v3;
> +}
> +
>  static PowerPCCPUClass *ppc_cpu_get_family_class(PowerPCCPUClass *pcc)
>  {
>      ObjectClass *oc = OBJECT_CLASS(pcc);
> diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h
> index 8da2ee418a..56e222dfc2 100644
> --- a/target/ppc/kvm_ppc.h
> +++ b/target/ppc/kvm_ppc.h
> @@ -56,6 +56,8 @@ void kvmppc_hash64_write_pte(CPUPPCState *env, target_ulong pte_index,
>                               target_ulong pte0, target_ulong pte1);
>  bool kvmppc_has_cap_fixup_hcalls(void);
>  bool kvmppc_has_cap_htm(void);
> +bool kvmppc_has_cap_mmu_radix(void);
> +bool kvmppc_has_cap_mmu_hash_v3(void);
>  int kvmppc_enable_hwrng(void);
>  int kvmppc_put_books_sregs(PowerPCCPU *cpu);
>  PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void);
> @@ -262,6 +264,16 @@ static inline bool kvmppc_has_cap_htm(void)
>      return false;
>  }
>  
> +static inline bool kvmppc_has_cap_mmu_radix(void)
> +{
> +    return false;
> +}
> +
> +static inline bool kvmppc_has_cap_mmu_hash_v3(void)
> +{
> +    return false;
> +}
> +
>  static inline int kvmppc_enable_hwrng(void)
>  {
>      return -1;

-- 
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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