[Bug ld/22985] binutils: x86-64 linux kernels built with 2.31 do not boot

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22985

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |MOVED

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
This is a kernel bug:

https://bugzilla.kernel.org/show_bug.cgi?id=198851

and will be fixed by

Commit-ID:  e3d03598e8ae7d195af5d3d049596dec336f569f
Gitweb:     https://git.kernel.org/tip/e3d03598e8ae7d195af5d3d049596dec336f569f
Author:     H.J. Lu <address@hidden>
AuthorDate: Mon, 19 Mar 2018 13:57:46 -0700
Committer:  Ingo Molnar <address@hidden>
CommitDate: Tue, 20 Mar 2018 08:03:03 +0100

x86/build/64: Force the linker to use 2MB page size

Binutils 2.31 will enable -z separate-code by default for x86 to avoid
mixing code pages with data to improve cache performance as well as
security.  To reduce x86-64 executable and shared object sizes, the
maximum page size is reduced from 2MB to 4KB.  But x86-64 kernel must
be aligned to 2MB.  Pass -z max-page-size=0x200000 to linker to force
2MB page size regardless of the default page size used by linker.

Tested with Linux kernel 4.15.6 on x86-64.

Signed-off-by: H.J. Lu <address@hidden>
Cc: Andy Shevchenko <address@hidden>
Cc: Eric Biederman <address@hidden>
Cc: H. Peter Anvin <address@hidden>
Cc: Juergen Gross <address@hidden>
Cc: Kees Cook <address@hidden>
Cc: Kirill A. Shutemov <address@hidden>
Cc: Linus Torvalds <address@hidden>
Cc: Peter Zijlstra <address@hidden>
Cc: Thomas Gleixner <address@hidden>
Link:
http://lkml.kernel.org/r/address@hidden
Signed-off-by: Ingo Molnar <address@hidden>

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