Re: [PATCH 04/30] x86, kaiser: disable global pages by default with KAISER

From: Thomas Gleixner
Date: Mon Nov 27 2017 - 06:38:05 EST


On Sun, 26 Nov 2017, Ingo Molnar wrote:
> * Disable global pages for anything using the default
> * __PAGE_KERNEL* macros.
> *
> * PGE will still be enabled and _PAGE_GLOBAL may still be used carefully
> * for a few selected kernel mappings which must be visible to userspace,
> * when KAISER is enabled, like the entry/exit code and data.
> */
> #ifdef CONFIG_KAISER
> #define __PAGE_KERNEL_GLOBAL 0
> #else
> #define __PAGE_KERNEL_GLOBAL _PAGE_GLOBAL
> #endif
>
> ... and I've added your Reviewed-by tag which I assume now applies?

Ideally we replace the whole patch with the __supported_pte_mask one which
I posted as a delta patch.

Thanks,

tglx