linux-kernel - Re: [PATCH v2 1/1] KVM: arm64: Allow cacheable stage 2 mapping using VMA flags

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Message-ID: <20250117171043.GE5556@nvidia.com>
Date: Fri, 17 Jan 2025 13:10:43 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: David Hildenbrand <david@...hat.com>
Cc: Catalin Marinas <catalin.marinas@....com>,
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Subject: Re: [PATCH v2 1/1] KVM: arm64: Allow cacheable stage 2 mapping using
 VMA flags

On Fri, Jan 17, 2025 at 05:58:29PM +0100, David Hildenbrand wrote:

> VM_IO without VM_PFNMAP might be interesting; not sure if we even want to
> support that here.

The VMA is filled with struct pages of MEMORY_DEVICE_PCI_P2PDMA and is
non-cachable?

I don't have a use case for that with KVM at least.

Jason