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From: Julian Stecklina <jsteckli@amazon.de>
To: Khalid Aziz <khalid.aziz@oracle.com>
Cc: juergh@gmail.com, tycho@tycho.ws, ak@linux.intel.com,
	torvalds@linux-foundation.org, liran.alon@oracle.com,
	keescook@google.com, konrad.wilk@oracle.com,
	deepa.srinivasan@oracle.com, chris.hyser@oracle.com,
	tyhicks@canonical.com, dwmw@amazon.co.uk,
	andrew.cooper3@citrix.com, jcm@redhat.com,
	boris.ostrovsky@oracle.com, kanth.ghatraju@oracle.com,
	joao.m.martins@oracle.com, jmattson@google.com,
	pradeep.vincent@oracle.com, john.haxby@oracle.com,
	tglx@linutronix.de, kirill.shutemov@linux.intel.com, hch@lst.de,
	steven.sistare@oracle.com, kernel-hardening@lists.openwall.com,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org,
	"Vasileios P . Kemerlis" <vpk@cs.columbia.edu>,
	Juerg Haefliger <juerg.haefliger@canonical.com>,
	Tycho Andersen <tycho@docker.com>,
	Marco Benatto <marco.antonio.780@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>
Subject: Re: [RFC PATCH v7 12/16] xpfo, mm: remove dependency on CONFIG_PAGE_EXTENSION
Date: Wed, 16 Jan 2019 16:01:05 +0100	[thread overview]
Message-ID: <ciirm8k1j4zlxq.fsf@u54ee758033e858cfa736.ant.amazon.com> (raw)
In-Reply-To: <a9436d3bc7943123bdbaac3f3e2b6bec3153ee05.1547153058.git.khalid.aziz@oracle.com> (Khalid Aziz's message of "Thu, 10 Jan 2019 14:09:44 -0700")

Khalid Aziz <khalid.aziz@oracle.com> writes:

> From: Julian Stecklina <jsteckli@amazon.de>
>
> Instead of using the page extension debug feature, encode all
> information, we need for XPFO in struct page. This allows to get rid of
> some checks in the hot paths and there are also no pages anymore that
> are allocated before XPFO is enabled.

I have another patch lying around that turns the XPFO per-page locks
into bit spinlocks and thus get the size of struct page to <= 64 byte
again. In case someone's interested, ping me.

Julian

  reply	other threads:[~2019-01-16 15:05 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-10 21:09 [RFC PATCH v7 00/16] Add support for eXclusive Page Frame Ownership Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 01/16] mm: add MAP_HUGETLB support to vm_mmap Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 02/16] x86: always set IF before oopsing from page fault Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 03/16] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 04/16] swiotlb: Map the buffer if it was unmapped by XPFO Khalid Aziz
2019-01-23 14:16   ` Konrad Rzeszutek Wilk
2019-01-10 21:09 ` [RFC PATCH v7 05/16] arm64/mm: Add support for XPFO Khalid Aziz
2019-01-10 21:09   ` Khalid Aziz
2019-01-23 14:20   ` Konrad Rzeszutek Wilk
2019-01-23 14:20     ` Konrad Rzeszutek Wilk
2019-02-12 15:45     ` Khalid Aziz
2019-02-12 15:45       ` Khalid Aziz
2019-01-23 14:24   ` Konrad Rzeszutek Wilk
2019-01-23 14:24     ` Konrad Rzeszutek Wilk
2019-02-12 15:52     ` Khalid Aziz
2019-02-12 15:52       ` Khalid Aziz
2019-02-12 20:01       ` Laura Abbott
2019-02-12 20:01         ` Laura Abbott
2019-02-12 20:34         ` Khalid Aziz
2019-02-12 20:34           ` Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 06/16] xpfo: add primitives for mapping underlying memory Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 07/16] arm64/mm, xpfo: temporarily map dcache regions Khalid Aziz
2019-01-10 21:09   ` Khalid Aziz
2019-01-11 14:54   ` Tycho Andersen
2019-01-11 14:54     ` Tycho Andersen
2019-01-11 18:28     ` Khalid Aziz
2019-01-11 18:28       ` Khalid Aziz
2019-01-11 19:50       ` Tycho Andersen
2019-01-11 19:50         ` Tycho Andersen
2019-01-23 14:56   ` Konrad Rzeszutek Wilk
2019-01-23 14:56     ` Konrad Rzeszutek Wilk
2019-01-10 21:09 ` [RFC PATCH v7 08/16] arm64/mm: disable section/contiguous mappings if XPFO is enabled Khalid Aziz
2019-01-10 21:09   ` Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 09/16] mm: add a user_virt_to_phys symbol Khalid Aziz
2019-01-10 21:09   ` Khalid Aziz
2019-01-23 15:03   ` Konrad Rzeszutek Wilk
2019-01-23 15:03     ` Konrad Rzeszutek Wilk
2019-01-10 21:09 ` [RFC PATCH v7 10/16] lkdtm: Add test for XPFO Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 11/16] mm, x86: omit TLB flushing by default for XPFO page table modifications Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 12/16] xpfo, mm: remove dependency on CONFIG_PAGE_EXTENSION Khalid Aziz
2019-01-16 15:01   ` Julian Stecklina [this message]
2019-01-10 21:09 ` [RFC PATCH v7 13/16] xpfo, mm: optimize spinlock usage in xpfo_kunmap Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 14/16] EXPERIMENTAL: xpfo, mm: optimize spin lock usage in xpfo_kmap Khalid Aziz
2019-01-17  0:18   ` Laura Abbott
2019-01-17 15:14     ` Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 15/16] xpfo, mm: Fix hang when booting with "xpfotlbflush" Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 16/16] xpfo, mm: Defer TLB flushes for non-current CPUs (x86 only) Khalid Aziz
2019-01-10 23:07 ` [RFC PATCH v7 00/16] Add support for eXclusive Page Frame Ownership Kees Cook
2019-01-10 23:07   ` Kees Cook
2019-01-11  0:20   ` Khalid Aziz
2019-01-11  0:44   ` Andy Lutomirski
2019-01-11  0:44     ` Andy Lutomirski
2019-01-11 21:45     ` Khalid Aziz
2019-01-10 23:40 ` Dave Hansen
2019-01-11  9:59   ` Peter Zijlstra
2019-01-11 18:21   ` Khalid Aziz
2019-01-11 20:42     ` Dave Hansen
2019-01-11 21:06       ` Andy Lutomirski
2019-01-11 21:06         ` Andy Lutomirski
2019-01-11 23:25         ` Khalid Aziz
2019-01-11 23:23       ` Khalid Aziz
2019-01-16  1:28 ` Laura Abbott
2019-01-16 14:56 ` Julian Stecklina
2019-01-16 15:16   ` Khalid Aziz
2019-01-17 23:38 ` Laura Abbott

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