| Date | Tue, 14 Jul 2020 18:23:47 -0700 | From | Kees Cook <> | Subject | Re: [PATCH v4 15/75] x86/boot/compressed/64: Always switch to own page-table |
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On Tue, Jul 14, 2020 at 02:08:17PM +0200, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@suse.de> > > 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 <jroedel@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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