x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages

x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages

In order for memory pages to be properly mapped when SEV is active, it's
necessary to use the PAGE_KERNEL protection attribute as the base
protection.  This ensures that memory mapping of, e.g. ACPI tables,
receives the proper mapping attributes.

Signed-off-by: Tom Lendacky <[email protected]>
Signed-off-by: Brijesh Singh <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Tested-by: Borislav Petkov <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: [email protected]
Cc: Jérôme Glisse <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]