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SubjectRe: [RFC, PATCH 16/22] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
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On 03/05/2018 08:26 AM, Kirill A. Shutemov wrote:
> + * It includes full range of PFN bits regardless if they were claimed for KeyID
> + * or not: we want to preserve KeyID on pte_modify() and pgprot_modify().
> */
> -#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
> +#define PTE_PFN_MASK_MAX \
> + (((signed long)PAGE_MASK) & ((1UL << __PHYSICAL_MASK_SHIFT) - 1))
> +#define _PAGE_CHG_MASK (PTE_PFN_MASK_MAX | _PAGE_PCD | _PAGE_PWT | \
> _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
> _PAGE_SOFT_DIRTY)

Is there a way to make this:

#define _PAGE_CHG_MASK (PTE_PFN_MASK | PTE_KEY_MASK...? | _PAGE_PCD |

That would be a lot more understandable.

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