RE: [PATCHv8 00/11] Linear Address Masking enabling

[Tian, Kevin]

> From: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Sent: Friday, September 16, 2022 1:29 AM
> 
> I really struggle with naming here. Any suggestions on what XXX has to be
> replaced with? I don't think it has to be limited to LAM as some other
> tagging implementation may come later.

What about ARCH_ENABLE_TAGGED_ADDR_CPU to mark that the application
tags address only on CPU and pays attention to untag when the address is
programmed to a device?

w/ ARCH_ENABLE_TAGGED_ADDR_CPU then LAM and SVA can co-exist.

The original ARCH_ENABLE_TAGGED_ADDR means that tagged address is
used on both CPU and device. Enabling sva on a device behind an iommu
which doesn't support LAM is then rejected if LAM has been enabled. and
vice versa.

Thanks
Kevin