Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1672529 > unrolled thread

Re: [PATCH v7 18/36] x86/efi: Update EFI pagetable creation to work with SME

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: [PATCH v7 18/36] x86/efi: Update EFI pagetable creation to work  with SME Matt Fleming <matt@codeblueprint.co.uk> - 2017-06-22 13:00 +0200

#1672529 — Re: [PATCH v7 18/36] x86/efi: Update EFI pagetable creation to work with SME

On Fri, 16 Jun, at 01:53:17PM, Tom Lendacky wrote:
> When SME is active, pagetable entries created for EFI need to have the
> encryption mask set as necessary.
> 
> When the new pagetable pages are allocated they are mapped encrypted. So,
> update the efi_pgt value that will be used in cr3 to include the encryption
> mask so that the PGD table can be read successfully. The pagetable mapping
> as well as the kernel are also added to the pagetable mapping as encrypted.
> All other EFI mappings are mapped decrypted (tables, etc.).
> 
> Reviewed-by: Borislav Petkov <bp@suse.de>
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
> ---
>  arch/x86/platform/efi/efi_64.c |   15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
 
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web