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SubjectRe: KAISER memory layout (Re: [PATCH 06/23] x86, kaiser: introduce user-mapped percpu areas)
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On 11/02/2017 02:41 AM, Andy Lutomirski wrote:
>
> - The GDT array.
> - The IDT.
> - The vsyscall page. We can make this be _PAGE_USER.
> - The TSS.
> - The per-cpu entry stack. Let's make it one page with guard pages
> on either side. This can replace rsp_scratch.
> - cpu_current_top_of_stack. This could be in the same page as the TSS.
> - The entry text.
> - The percpu IST (aka "EXCEPTION") stacks.
>
> That's it.

The PEBS/BTS buffers need it too, I think:

https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-kaiser.git/commit/?h=kaiser-414rc6-20171031&id=97a334906d7853a8109b295ef94f3991418d0c07

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