Re: [kbuild-all] [PATCH v4 13/22] KVM: arm64: ITS: KVM_DEV_ARM_VGIC_GRP_ITS_TABLES group

Auger Eric
2017-03-30T08:27:52Z

Hi Xiaolong,

On 30/03/2017 09:29, Ye Xiaolong wrote:
> On 03/30, Auger Eric wrote:
>> Hi Xiaolong
>>
>> On 30/03/2017 04:21, Ye Xiaolong wrote:
>>> Hi, Eric
>>>
>>> On 03/27, Auger Eric wrote:
>>>> Hi,
>>>>
>>>> On 27/03/2017 17:04, kbuild test robot wrote:
>>>>> Hi Eric,
>>>>>
>>>>> [auto build test ERROR on kvmarm/next]
>>>>> [also build test ERROR on v4.11-rc4 next-20170327]
>>>>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>>>>>
>>>>> url: https://github.com/0day-ci/linux/commits/Eric-Auger/vITS-save-restore/20170327-195443
>>>>> base: https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next
>>>>> config: arm64-defconfig (attached as .config)
>>>>> compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
>>>>> reproduce:
>>>>> wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>>>> chmod +x ~/bin/make.cross
>>>>> # save the attached .config to linux build tree
>>>>> make.cross ARCH=arm64
>>>>>
>>>>> All errors (new ones prefixed by >>):
>>>>>
>>>>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-its.c: In function 'vgic_its_has_attr':
>>>>>>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-its.c:1766:33: error: 'its' undeclared (first use in this function)
>>>>> return vgic_its_table_restore(its);
>>>>
>>>> I think this is due to the fact the series is applied on KVM: arm/arm64:
>>>> Emulate the EL1 phys timer registers (kvmarm-for-4.11).
>>>>
>>>> Please apply it to (kvmarm/queue, kvmarm/next, kvm_next) KVM: arm/arm64:
>>>> vgic: Improve sync_hwstate performance (255905e)
>>>> I also checked it compiles on 4.11-rc4.
>>>
>>> Hmm, we did apply your series on top of kvarm/next, judging from the function
>>> code below, I can't see the 'its' declaration.
>>>
>>> static int vgic_its_has_attr(struct kvm_device *dev,
>>> struct kvm_device_attr *attr)
>>> {
>>> switch (attr->group) {
>>> case KVM_DEV_ARM_VGIC_GRP_ADDR:
>>> switch (attr->attr) {
>>> case KVM_VGIC_ITS_ADDR_TYPE:
>>> return 0;
>>> }
>>> break;
>>> case KVM_DEV_ARM_VGIC_GRP_CTRL:
>>> switch (attr->attr) {
>>> case KVM_DEV_ARM_VGIC_CTRL_INIT:
>>> return 0;
>>> }
>>> break;
>>> case KVM_DEV_ARM_VGIC_GRP_ITS_REGS: {
>>> u64 __user *uaddr = (u64 __user *)(long)attr->addr;
>>> u64 reg;
>>>
>>> if (get_user(reg, uaddr))
>>> return -EFAULT;
>>>
>>> return vgic_its_attr_regs_access(dev, attr, &reg, true);
>>> }
>>> case KVM_DEV_ARM_VGIC_GRP_ITS_TABLES:
>>> if (attr->attr)
>>> return -EINVAL;
>>> return vgic_its_table_restore(its);
>> The above code shows that my series is not correctly applied since that
>> call to vgic_its_table_restore() should normally be in
>> vgic_its_set_attr() and not in vgic_its_has_attr() function
>> (virt/kvm/arm/vgic-its.c).
>>
>
> Er, you are right, the real problem here seems we had a rather old kvmarm/next mirror
> at the time 0day applied your series.
>
> Thanks for the clarification and sorry for the noise.

no worries

Thanks

Eric
>
> Thanks,
> Xiaolong
>> I pushed this series applied on top of up to date kvmarm/next at
>> https://github.com/eauger/linux/tree/v4.11-rc3-its-mig-v4.
>>
>> As noticed earlier, the series is applied on top of 255905e (KVM:
>> arm/arm64: vgic: Improve sync_hwstate performance)
>>
>> Thanks
>>
>> Eric
>>
>>
>>> }
>>> return -ENXIO;
>>> }
>>>
>>> Thanks,
>>> Xiaolong
>>>
>>>>
>>>> Please let me know if I got something wrong.
>>>>
>>>> Thanks
>>>>
>>>> Eric
>>>>> ^~~
>>>>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-its.c:1766:33: note: each undeclared identifier is reported only once for each function it appears in
>>>>>
>>>>> vim +/its +1766 arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-its.c
>>>>>
>>>>> 1750 case KVM_DEV_ARM_VGIC_CTRL_INIT:
>>>>> 1751 return 0;
>>>>> 1752 }
>>>>> 1753 break;
>>>>> 1754 case KVM_DEV_ARM_VGIC_GRP_ITS_REGS: {
>>>>> 1755 u64 __user *uaddr = (u64 __user *)(long)attr->addr;
>>>>> 1756 u64 reg;
>>>>> 1757
>>>>> 1758 if (get_user(reg, uaddr))
>>>>> 1759 return -EFAULT;
>>>>> 1760
>>>>> 1761 return vgic_its_attr_regs_access(dev, attr, &reg, true);
>>>>> 1762 }
>>>>> 1763 case KVM_DEV_ARM_VGIC_GRP_ITS_TABLES:
>>>>> 1764 if (attr->attr)
>>>>> 1765 return -EINVAL;
>>>>>> 1766 return vgic_its_table_restore(its);
>>>>> 1767 }
>>>>> 1768 return -ENXIO;
>>>>> 1769 }
>>>>> 1770
>>>>> 1771 static int vgic_its_set_attr(struct kvm_device *dev,
>>>>> 1772 struct kvm_device_attr *attr)
>>>>> 1773 {
>>>>> 1774 struct vgic_its *its = dev->private;
>>>>>
>>>>> ---
>>>>> 0-DAY kernel test infrastructure Open Source Technology Center
>>>>> https://lists.01.org/pipermail/kbuild-all Intel Corporation
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> linux-arm-kernel@lists.infradead.org
>>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>>>
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