From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
aarcange@redhat.com, luto@kernel.org,
torvalds@linux-foundation.org, keescook@google.com,
hughd@google.com, jgross@suse.com, x86@kernel.org,
namit@vmware.com
Subject: [RFC][PATCH 00/10] Use global pages with PTI
Date: Thu, 22 Feb 2018 12:36:51 -0800 [thread overview]
Message-ID: <20180222203651.B776810C@viggo.jf.intel.com> (raw)
The later verions of the KAISER pathces (pre-PTI) allowed the user/kernel
shared areas to be GLOBAL. The thought was that this would reduce the
TLB overhead of keeping two copies of these mappings.
During the switch over to PTI, we seem to have lost our ability to have
GLOBAL mappings. This adds them back.
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kees Cook <keescook@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: x86@kernel.org
Cc: Nadav Amit <namit@vmware.com>
next reply other threads:[~2018-02-22 20:37 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-22 20:36 Dave Hansen [this message]
2018-02-22 20:36 ` [RFC][PATCH 01/10] x86/mm: factor out pageattr _PAGE_GLOBAL setting Dave Hansen
2018-02-22 20:36 ` [RFC][PATCH 02/10] x86/mm: undo double _PAGE_PSE clearing Dave Hansen
2018-02-22 20:36 ` [RFC][PATCH 03/10] x86/mm: introduce "default" kernel PTE mask Dave Hansen
2018-02-22 22:21 ` Nadav Amit
2018-02-22 22:26 ` Dave Hansen
2018-02-22 23:11 ` Tom Lendacky
2018-02-23 23:46 ` Dave Hansen
2018-02-22 20:36 ` [RFC][PATCH 04/10] x86/espfix: use kernel-default " Dave Hansen
2018-02-22 21:27 ` Nadav Amit
2018-02-22 21:30 ` Dave Hansen
2018-02-22 21:59 ` Andy Lutomirski
2018-02-22 22:05 ` Dave Hansen
2018-02-22 20:37 ` [RFC][PATCH 05/10] x86/mm: do not auto-massage page protections Dave Hansen
2018-02-22 21:46 ` Nadav Amit
2018-02-22 21:52 ` Dave Hansen
2018-02-22 20:37 ` [RFC][PATCH 06/10] x86/mm: remove extra filtering in pageattr code Dave Hansen
2018-02-22 20:37 ` [RFC][PATCH 07/10] x86/mm: comment _PAGE_GLOBAL mystery Dave Hansen
2018-02-22 20:37 ` [RFC][PATCH 08/10] x86/mm: do not forbid _PAGE_RW before init for __ro_after_init Dave Hansen
2018-02-22 20:53 ` Kees Cook
2018-02-22 20:37 ` [RFC][PATCH 09/10] x86/pti: enable global pages for shared areas Dave Hansen
2018-02-22 20:37 ` [RFC][PATCH 10/10] x86/pti: clear _PAGE_GLOBAL for kernel image Dave Hansen
2018-02-22 21:52 ` [RFC][PATCH 00/10] Use global pages with PTI Linus Torvalds
2018-02-24 1:49 ` Dave Hansen
2018-02-24 4:20 ` Linus Torvalds
2018-02-24 4:34 ` [RFC][PATCH 00/10] Use global pages with PTI - Truth about the white man thetruthbeforeus
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