Messages in this thread | | | Date | Tue, 30 May 2017 16:55:00 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v5 32/32] x86/mm: Add support to make use of Secure Memory Encryption |
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On Tue, May 30, 2017 at 09:38:36AM -0500, Tom Lendacky wrote: > In this case we're running identity mapped and the "on" constant ends up > as kernel address (0xffffffff81...) which results in a segfault.
Would
static const char *__on_str = "on";
...
if (!strncmp(buffer, __pa_nodebug(__on_str), 2)) ...
work?
__phys_addr_nodebug() seems to pay attention to phys_base and PAGE_OFFSET and so on...
I'd like to avoid that rip-relative address finding in inline asm which looks fragile to me.
Thanks.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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