x86/boot/compressed/64: Always switch to own page table
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 the kernel 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. [ bp: Massage commit message. ] Signed-off-by: NJoerg Roedel <jroedel@suse.de> Signed-off-by: NBorislav Petkov <bp@suse.de> Reviewed-by: NKees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20200907131613.12703-17-joro@8bytes.org
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