Messages in this thread Patch in this message | | | From | Brijesh Singh <> | Subject | [Part1 PATCH v5 03/17] x86/mm: Don't attempt to encrypt initrd under SEV | Date | Wed, 27 Sep 2017 10:13:15 -0500 |
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From: Tom Lendacky <thomas.lendacky@amd.com>
When SEV is active the initrd/initramfs will already have already been placed in memory encrypted so do not try to encrypt it.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: linux-kernel@vger.kernel.org Cc: x86@kernel.org Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Borislav Petkov <bp@suse.de> --- arch/x86/kernel/setup.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 82559867e0a9..967155e63afe 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -368,9 +368,11 @@ static void __init reserve_initrd(void) * If SME is active, this memory will be marked encrypted by the * kernel when it is accessed (including relocation). However, the * ramdisk image was loaded decrypted by the bootloader, so make - * sure that it is encrypted before accessing it. + * sure that it is encrypted before accessing it. For SEV the + * ramdisk will already be encrypted, so only do this for SME. */ - sme_early_encrypt(ramdisk_image, ramdisk_end - ramdisk_image); + if (sme_active()) + sme_early_encrypt(ramdisk_image, ramdisk_end - ramdisk_image); initrd_start = 0; -- 2.9.5
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