Re: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range()
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2021-10-11 19:09:24
Also in:
linux-alpha, linux-arch, linux-mips, linux-pci, lkml, sparclinux, virtualization
On Mon, Oct 11, 2021 at 10:23:00AM -0700, Andi Kleen wrote:
On 10/11/2021 12:58 AM, Christoph Hellwig wrote:quoted
Just as last time: This does not make any sense. ioremap is shared by definition.It's not necessarily shared with the host for confidential computing: for example BIOS mappings definitely should not be shared, but they're using ioremap today.
That just needs to be fixed.
But if you have a better term please propose something. I tried to clarify it with "shared_host", but I don't know a better term. -Andi
The reason we have trouble is that it's not clear what does the API mean outside the realm of TDX. If we really, truly want an API that says "ioremap and it's a hardened driver" then I guess ioremap_hardened_driver is what you want. -- MST