Hi Christoffer,
thanks for your review and comments.
On 2017/5/2 15:56, Christoffer Dall wrote:
> Hi Dongjiu,
>
> Please send a cover letter for patch series with more than a single
> patch.
OK, got it.
>
> The subject and description of these patches are also misleading.
> Hopefully this is in no way tied to kvmtool, but to userspace
> generically, for example also to be used by QEMU?
>
> On Sun, Apr 30, 2017 at 01:37:55PM +0800, Dongjiu Geng wrote:
>> Handle kvmtool's detection for RAS extension, because sometimes
>> the APP needs to know the CPU's capacity
>
> the APP ?
>
> the CPU's capacity?
I will fix it.
>
>>
>> Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
>> ---
>> arch/arm64/kvm/reset.c | 11 +++++++++++
>> include/uapi/linux/kvm.h | 1 +
>> 2 files changed, 12 insertions(+)
>>
>> diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
>> index d9e9697..1004039 100644
>> --- a/arch/arm64/kvm/reset.c
>> +++ b/arch/arm64/kvm/reset.c
>> @@ -64,6 +64,14 @@ static bool cpu_has_32bit_el1(void)
>> return !!(pfr0 & 0x20);
>> }
>>
>> +static bool kvm_arm_support_ras_extension(void)
>> +{
>> + u64 pfr0;
>> +
>> + pfr0 = read_system_reg(SYS_ID_AA64PFR0_EL1);
>> + return !!(pfr0 & 0x10000000);
>> +}
>> +
>> /**
>> * kvm_arch_dev_ioctl_check_extension
>> *
>> @@ -87,6 +95,9 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
>> case KVM_CAP_ARM_PMU_V3:
>> r = kvm_arm_support_pmu_v3();
>> break;
>> + case KVM_CAP_ARM_RAS_EXTENSION:
>> + r = kvm_arm_support_ras_extension();
>> + break;
>
> You need to document this capability and API in
> Documentation/virtual/kvm/api.txt and explain how this works.
Ok, thanks for your suggestion.
>
>
>
>> case KVM_CAP_SET_GUEST_DEBUG:
>> case KVM_CAP_VCPU_ATTRIBUTES:
>> r = 1;
>> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
>> index f51d508..27fe556 100644
>> --- a/include/uapi/linux/kvm.h
>> +++ b/include/uapi/linux/kvm.h
>> @@ -883,6 +883,7 @@ struct kvm_ppc_resize_hpt {
>> #define KVM_CAP_PPC_MMU_RADIX 134
>> #define KVM_CAP_PPC_MMU_HASH_V3 135
>> #define KVM_CAP_IMMEDIATE_EXIT 136
>> +#define KVM_CAP_ARM_RAS_EXTENSION 137
>>
>> #ifdef KVM_CAP_IRQ_ROUTING
>>
>> --
>> 2.10.1
>>
>
> Thanks,
> -Christoffer
>
> .
>
