On Tue 2016-04-26 17:56:26, Tom Lendacky wrote: > Provide support for Secure Memory Encryption (SME). This initial support > defines the memory encryption mask as a variable for quick access and an > accessor for retrieving the number of physical addressing bits lost if > SME is enabled. > > Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx> > --- > arch/x86/include/asm/mem_encrypt.h | 37 ++++++++++++++++++++++++++++++++++++ > arch/x86/kernel/Makefile | 2 ++ > arch/x86/kernel/mem_encrypt.S | 29 ++++++++++++++++++++++++++++ > arch/x86/kernel/x8664_ksyms_64.c | 6 ++++++ > 4 files changed, 74 insertions(+) > create mode 100644 arch/x86/include/asm/mem_encrypt.h > create mode 100644 arch/x86/kernel/mem_encrypt.S > > index 0000000..ef7f325 > --- /dev/null > +++ b/arch/x86/kernel/mem_encrypt.S > @@ -0,0 +1,29 @@ > +/* > + * AMD Memory Encryption Support > + * > + * Copyright (C) 2016 Advanced Micro Devices, Inc. > + * > + * Author: Tom Lendacky <thomas.lendacky@xxxxxxx> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/linkage.h> > + > + .text > + .code64 > +ENTRY(sme_get_me_loss) > + xor %rax, %rax > + mov sme_me_loss(%rip), %al > + ret > +ENDPROC(sme_get_me_loss) Does this really need to be implemented in assembly? -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
