Re: [PATCH v2 3/4] arm64: mm: make vmemmap region a projection of the linear region
From: Steve Capper <hidden>
Date: 2020-10-13 16:53:22
On 08/10/2020 16:36, Ard Biesheuvel wrote:
Now that we have reverted the introduction of the vmemmap struct page pointer and the separate physvirt_offset, we can simplify things further, and place the vmemmap region in the VA space in such a way that virtual to page translations and vice versa can be implemented using a single arithmetic shift. One happy coincidence resulting from this is that the 48-bit/4k and 52-bit/64k configurations (which are assumed to be the two most prevalent) end up with the same placement of the vmemmap region. In a subsequent patch, we will take advantage of this, and unify the memory maps even more. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Steve Capper <redacted> Cheers, -- Steve _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel