Re: [Qemu-devel] [PATCH 16/37] target-i386: set kvm CPUID default feature values using static properties

[Don Slutz <Don@CloudSwitch.Com>]

On 10/22/12 11:03, Igor Mammedov wrote:
> Replace setting default supported kvm features in cpu_x86_find_by_name()
> by default values in corresponding static properties.
>
> - Compile in kvm CPUID features only if CONFIG_KVM is defined.
> - Make "f-kvm_steal_tm" and "f-kvmclock_stable" CPUID features visible as properties.
Not sure that KVM_FEATURE_STEAL_TIME should translate to kvm_steal_tm.  
I think that I have seen that new names should use "-".  So I would 
think the new name should be "f-kvm-steal-time". And 
KVM_FEATURE_CLOCKSOURCE_STABLE_BIT should be "f-kvm-clock-stable".
>
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
>   target-i386/cpu.c | 30 +++++++++++-------------------
>   1 file changed, 11 insertions(+), 19 deletions(-)
>
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index dc4fcdf..407c5ce 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -200,12 +200,16 @@ static Property cpu_x86_properties[] = {
>       DEFINE_PROP_BIT("f-fma4", X86CPU, env.cpuid_ext3_features, 16, false),
>       DEFINE_PROP_BIT("f-cvt16", X86CPU, env.cpuid_ext3_features, 18, false),
>       DEFINE_PROP_BIT("f-nodeid_msr", X86CPU, env.cpuid_ext3_features, 19, false),
> -    DEFINE_PROP_BIT("f-kvmclock", X86CPU, env.cpuid_kvm_features,  0, false),
> -    DEFINE_PROP_BIT("f-kvm_nopiodelay", X86CPU, env.cpuid_kvm_features,  1, false),
> -    DEFINE_PROP_BIT("f-kvm_mmu", X86CPU, env.cpuid_kvm_features,  2, false),
> -    DEFINE_PROP_BIT("f-kvmclock2", X86CPU, env.cpuid_kvm_features,  3, false),
> -    DEFINE_PROP_BIT("f-kvm_asyncpf", X86CPU, env.cpuid_kvm_features,  4, false),
> -    DEFINE_PROP_BIT("f-kvm_pv_eoi", X86CPU, env.cpuid_kvm_features,  6, false),
> +#if defined(CONFIG_KVM)
> +    DEFINE_PROP_BIT("f-kvmclock", X86CPU, env.cpuid_kvm_features,  0, true),
> +    DEFINE_PROP_BIT("f-kvm_nopiodelay", X86CPU, env.cpuid_kvm_features,  1, true),
> +    DEFINE_PROP_BIT("f-kvm_mmu", X86CPU, env.cpuid_kvm_features,  2, true),
> +    DEFINE_PROP_BIT("f-kvmclock2", X86CPU, env.cpuid_kvm_features,  3, true),
> +    DEFINE_PROP_BIT("f-kvm_asyncpf", X86CPU, env.cpuid_kvm_features,  4, true),
> +    DEFINE_PROP_BIT("f-kvm_steal_tm", X86CPU, env.cpuid_kvm_features,  5, true),
> +    DEFINE_PROP_BIT("f-kvm_pv_eoi", X86CPU, env.cpuid_kvm_features,  6, true),
> +    DEFINE_PROP_BIT("f-kvmclock_stable", X86CPU, env.cpuid_kvm_features,  24, true),
> +#endif
>       DEFINE_PROP_BIT("f-npt", X86CPU, env.cpuid_svm_features,  0, false),
>       DEFINE_PROP_BIT("f-lbrv", X86CPU, env.cpuid_svm_features,  1, false),
>       DEFINE_PROP_BIT("f-svm_lock", X86CPU, env.cpuid_svm_features,  2, false),
> @@ -1314,7 +1318,7 @@ static int cpu_x86_find_by_name(X86CPU *cpu, x86_def_t *x86_cpu_def,
>       /* Features to be added*/
>       uint32_t plus_features = 0, plus_ext_features = env->cpuid_ext_features;
>       uint32_t plus_ext2_features = 0, plus_ext3_features = 0;
> -    uint32_t plus_kvm_features = 0, plus_svm_features = 0;
> +    uint32_t plus_kvm_features = env->cpuid_kvm_features, plus_svm_features = 0;
>       uint32_t plus_7_0_ebx_features = 0;
>       /* Features to be removed */
>       uint32_t minus_features = 0, minus_ext_features = 0;
> @@ -1334,18 +1338,6 @@ static int cpu_x86_find_by_name(X86CPU *cpu, x86_def_t *x86_cpu_def,
>           memcpy(x86_cpu_def, def, sizeof(*def));
>       }
>   
> -#if defined(CONFIG_KVM)
> -    plus_kvm_features = (1 << KVM_FEATURE_CLOCKSOURCE) |
> -        (1 << KVM_FEATURE_NOP_IO_DELAY) |
> -        (1 << KVM_FEATURE_MMU_OP) |
> -        (1 << KVM_FEATURE_CLOCKSOURCE2) |
> -        (1 << KVM_FEATURE_ASYNC_PF) |
> -        (1 << KVM_FEATURE_STEAL_TIME) |
> -        (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);
> -#else
> -    plus_kvm_features = 0;
> -#endif
> -
>       featurestr = strtok(NULL, ",");
>   
>       while (featurestr) {
   -Don Slutz