Re: [Qemu-arm] [Qemu-devel] [RFC v4 02/16] linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT

[Auger Eric]

Hi Suzuki,

On 10/19/18 10:49 AM, Suzuki K Poulose wrote:
> Hi Eric,
> 
> On 10/18/2018 03:30 PM, Eric Auger wrote:
>> This is a header update against kvmarm next branch
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm kvmarm/next
>>
>> to get the KVM_ARM_GET_MAX_VM_PHYS_SHIFT ioctl. This allows to retrieve
>> the IPA address range KVM supports.
>>
>> Signed-off-by: Eric Auger <address@hidden>
>>
>> ---
>>
>> v3 -> v4:
>> - update against kvmarm next
>> ---
>>   linux-headers/linux/kvm.h | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
>> index 83ba4eb571..9647ce4fcb 100644
>> --- a/linux-headers/linux/kvm.h
>> +++ b/linux-headers/linux/kvm.h
>> @@ -750,6 +750,15 @@ struct kvm_ppc_resize_hpt {
>>     #define KVM_S390_SIE_PAGE_OFFSET 1
>>   +/*
>> + * On arm64, machine type can be used to request the physical
>> + * address size for the VM. Bits[7-0] are reserved for the guest
>> + * PA size shift (i.e, log2(PA_Size)). For backward compatibility,
>> + * value 0 implies the default IPA size, 40bits.
>> + */
>> +#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK    0xffULL
>> +#define KVM_VM_TYPE_ARM_IPA_SIZE(x)        \
>> +    ((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK)
>>   /*
>>    * ioctls for /dev/kvm fds:
>>    */
>> @@ -953,6 +962,7 @@ struct kvm_ppc_resize_hpt {
>>   #define KVM_CAP_NESTED_STATE 157
>>   #define KVM_CAP_ARM_INJECT_SERROR_ESR 158
>>   #define KVM_CAP_MSR_PLATFORM_INFO 159
>> +#define KVM_CAP_ARM_VM_IPA_SIZE 160 /* returns maximum IPA bits for a
>> VM */
> 
> Please be aware that there have been multiple merge conflicts with
> the kvmarm-tree onto kvm tree upstream and the numbers have changed.
> I assume that you will be rebasing this to mainline anyways.

Thank you for the heads up. Yes I will respin this header update against
the master branch later on.

Thanks

Eric
> 
> Cheers
> Suzuki
>