linux-kernel - Re: [PATCH v4 1/1] vfio/nvgpu: Add vfio pci variant module for grace hopper

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4b0f4def-e2bd-b7b2-7c70-1df741780e1c@redhat.com>
Date:   Fri, 23 Jun 2023 17:07:37 +0200
From:   Cédric Le Goater <clegoate@...hat.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     ankita@...dia.com, alex.williamson@...hat.com, aniketa@...dia.com,
        cjia@...dia.com, kwankhede@...dia.com, targupta@...dia.com,
        vsethi@...dia.com, acurrid@...dia.com, apopple@...dia.com,
        jhubbard@...dia.com, danw@...dia.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/1] vfio/nvgpu: Add vfio pci variant module for grace
 hopper

On 6/23/23 15:07, Jason Gunthorpe wrote:
> On Fri, Jun 23, 2023 at 03:04:17PM +0200, Cédric Le Goater wrote:
>> On 6/23/23 13:47, Jason Gunthorpe wrote:
>>> On Fri, Jun 23, 2023 at 08:27:17AM +0200, Cédric Le Goater wrote:
>>>>> +	req_len = vma->vm_end - vma->vm_start;
>>>>> +	pgoff = vma->vm_pgoff &
>>>>> +		((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1);
>>>>> +	if (pgoff >= (nvdev->mem_prop.mem_length >> PAGE_SHIFT))
>>>>> +		return -EINVAL;
>>>>
>>>> you cound introduce accessor macros for nvdev->mem_prop.mem_length and
>>>> nvdev->mem_prop.hpa
>>>
>>> Accessors are not the usual style..
>>
>> I meant something like
>>
>>    #define nvgpu_mem_size(nvdev) (nvdev)->mem_prop.mem_length
>>    #define nvgpu_mem_pa_base(nvdev) (nvdev)->mem_prop.hpa
>>
>> This is minor.
> 
> Yeah, this is what I thought you ment, I'm against this kind of
> obfuscation in the kernel without a very strong purpose, and if you do
> something like this it should be a static inline function.

OK. We could drop the intermediate struct attribute instead then.

Thanks,

C.