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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2017-03-30 11:07:31 +0300
committerIngo Molnar <mingo@kernel.org>2017-04-04 08:22:34 +0200
commit1d33b219563fb9f7384c8c609c767cb6bfd44b8e (patch)
treeed3ad0eabe9922aa9c99f81879874f0d4d8b8ca0 /Documentation/x86
parent5480bb61cfba5de23df59793527c3a37c0d2e247 (diff)
downloadlinux-1d33b219563fb9f7384c8c609c767cb6bfd44b8e.tar.bz2
x86/espfix: Add support for 5-level paging
We don't need extra virtual address space for ESPFIX, so it stays within one PUD page table for both 4- and 5-level paging. Redefining ESPFIX_BASE_ADDR using P4D_SHIFT instead of PGDIR_SHIFT would make it stay in the same place regarding of paging mode. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170330080731.65421-8-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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