Revisiting WC mmap Support for VFIO PCI

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To: <kvm@xxxxxxxxxxxxxxx>
Subject: Revisiting WC mmap Support for VFIO PCI
From: Mahmoud Nagy Adam <mngyadam@xxxxxxxxx>
Date: Wed, 16 Jul 2025 19:11:50 +0200
Cc: Jason Gunthorpe <jgg@xxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Praveen Kumar <pravkmr@xxxxxxxxx>, <nagy@xxxxxxxxxxxxxxx>

Hi all,

I’d like to revisit the topic of adding Write Combining (WC) mmap
support for VFIO PCI. We (Amazon Linux) are currently working on
allowing this feature, and I wanted to share the current approach and
gather feedback from the community.

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- Re: Revisiting WC mmap Support for VFIO PCI
  - From: Jason Gunthorpe

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