Re: [PATCH v4 15/75] x86/boot/compressed/64: Always switch to own page-table

On Tue, Jul 14, 2020 at 02:08:17PM +0200, Joerg Roedel wrote:

From: Joerg Roedel <redacted>

When booted through startup_64 the kernel keeps running on the EFI
page-table until the KASLR code sets up its own page-table. Without
KASLR the pre-decompression boot code never switches off the EFI
page-table. Change that by unconditionally switching to a kernel
controlled page-table after relocation.

This makes sure we can make changes to the mapping when necessary, for
example map pages unencrypted in SEV and SEV-ES guests.

Also remove the debug_putstr() calls in initialize_identity_maps()
because the function now runs before console_init() is called.

Signed-off-by: Joerg Roedel <redacted>

Reviewed-by: Kees Cook <redacted>

-- 
Kees Cook