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65f750e545
On AMD SME machines, makedumpfile tools need to know whether the crashed kernel was encrypted. If SME is enabled in the first kernel, the crashed kernel's page table entries (pgd/pud/pmd/pte) contain the memory encryption mask which makedumpfile needs to remove in order to obtain the true physical address. Export that mask in a vmcoreinfo variable. [ bp: Massage commit message and move define at the end of the function. ] Signed-off-by: Lianbo Jiang <lijiang@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: anderson@redhat.com Cc: k-hagio@ab.jp.nec.com Cc: kexec@lists.infradead.org Cc: linux-doc@vger.kernel.org Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190110121944.6050-3-lijiang@redhat.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.