On Mon, Aug 22, 2016 at 07:25:25PM -0400, Brijesh Singh wrote: > From: Tom Lendacky <thomas.lendacky@xxxxxxx> > > EFI data is encrypted when the kernel is run under SEV. Update the > page table references to be sure the EFI memory areas are accessed > encrypted. > > Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx> > --- > arch/x86/platform/efi/efi_64.c | 14 ++++++++++++-- > 1 file changed, 12 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c > index 0871ea4..98363f3 100644 > --- a/arch/x86/platform/efi/efi_64.c > +++ b/arch/x86/platform/efi/efi_64.c > @@ -213,7 +213,7 @@ void efi_sync_low_kernel_mappings(void) > > int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) > { > - unsigned long pfn, text; > + unsigned long pfn, text, flags; > efi_memory_desc_t *md; > struct page *page; > unsigned npages; > @@ -230,6 +230,10 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) > efi_scratch.efi_pgt = (pgd_t *)__sme_pa(efi_pgd); > pgd = efi_pgd; > > + flags = _PAGE_NX | _PAGE_RW; > + if (sev_active) > + flags |= _PAGE_ENC; So this is confusing me. There's this patch which says EFI data is accessed in the clear: https://lkml.kernel.org/r/20160822223738.29880.6909.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx but now here it is encrypted when SEV is enabled. Do you mean, it is encrypted here because we're in the guest kernel? Thanks. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) -- -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html