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efi/x86: Add RNG seed EFI table to unencrypted mapping check

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When booting with SME active, EFI tables must be mapped unencrypted since
they were built by UEFI in unencrypted memory. Update the list of tables
to be checked during early_memremap() processing to account for the EFI
RNG seed table.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: linux-efi@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Link: https://lore.kernel.org/r/b64385fc13e5d7ad4b459216524f138e7879234f.1582662842.git.thomas.lendacky@amd.com
Link: https://lore.kernel.org/r/20200228121408.9075-3-ardb@kernel.org
This commit is contained in:
Tom Lendacky 2020-02-28 13:14:04 +01:00 • committed by Ingo Molnar
parent f10e80a19b
commit badc61982a
3 changed files with 13 additions and 8 deletions
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2
include/linux/efi.h
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@ -526,6 +526,8 @@ typedef struct {
efi_time_t time_of_revocation;
} efi_cert_x509_sha256_t;
extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */
/*
* All runtime access to EFI goes through this structure:
*/