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

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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.




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