From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Tycho Andersen <tycho@docker.com>,
kernel-hardening@lists.openwall.com, linux-mm@kvack.org,
deepa.srinivasan@oracle.com, steven.sistare@oracle.com,
joao.m.martins@oracle.com, boris.ostrovsky@oracle.com,
tycho@tycho.ws, ak@linux.intel.com, hch@lst.de,
kanth.ghatraju@oracle.com, jsteckli@amazon.de,
pradeep.vincent@oracle.com, jcm@redhat.com,
liran.alon@oracle.com, tglx@linutronix.de,
chris.hyser@oracle.com, linux-arm-kernel@lists.infradead.org,
jmattson@google.com, juergh@gmail.com, andrew.cooper3@citrix.com,
linux-kernel@vger.kernel.org, tyhicks@canonical.com,
john.haxby@oracle.com,
Juerg Haefliger <juerg.haefliger@canonical.com>,
dwmw@amazon.co.uk, keescook@google.com,
torvalds@linux-foundation.org, kirill.shutemov@linux.intel.com
Subject: Re: [RFC PATCH v7 05/16] arm64/mm: Add support for XPFO
Date: Wed, 23 Jan 2019 09:20:49 -0500 [thread overview]
Message-ID: <20190123142047.GB19289@Konrads-MacBook-Pro.local> (raw)
In-Reply-To: <89f03091af87f5ab27bd6cafb032236d5bd81d65.1547153058.git.khalid.aziz@oracle.com>
On Thu, Jan 10, 2019 at 02:09:37PM -0700, Khalid Aziz wrote:
> From: Juerg Haefliger <juerg.haefliger@canonical.com>
>
> Enable support for eXclusive Page Frame Ownership (XPFO) for arm64 and
> provide a hook for updating a single kernel page table entry (which is
> required by the generic XPFO code).
>
> v6: use flush_tlb_kernel_range() instead of __flush_tlb_one()
>
> CC: linux-arm-kernel@lists.infradead.org
> Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
> Signed-off-by: Tycho Andersen <tycho@docker.com>
> Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
> ---
> arch/arm64/Kconfig | 1 +
> arch/arm64/mm/Makefile | 2 ++
> arch/arm64/mm/xpfo.c | 58 ++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 61 insertions(+)
> create mode 100644 arch/arm64/mm/xpfo.c
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index ea2ab0330e3a..f0a9c0007d23 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -171,6 +171,7 @@ config ARM64
> select SWIOTLB
> select SYSCTL_EXCEPTION_TRACE
> select THREAD_INFO_IN_TASK
> + select ARCH_SUPPORTS_XPFO
> help
> ARM 64-bit (AArch64) Linux support.
>
> diff --git a/arch/arm64/mm/Makefile b/arch/arm64/mm/Makefile
> index 849c1df3d214..cca3808d9776 100644
> --- a/arch/arm64/mm/Makefile
> +++ b/arch/arm64/mm/Makefile
> @@ -12,3 +12,5 @@ KASAN_SANITIZE_physaddr.o += n
>
> obj-$(CONFIG_KASAN) += kasan_init.o
> KASAN_SANITIZE_kasan_init.o := n
> +
> +obj-$(CONFIG_XPFO) += xpfo.o
> diff --git a/arch/arm64/mm/xpfo.c b/arch/arm64/mm/xpfo.c
> new file mode 100644
> index 000000000000..678e2be848eb
> --- /dev/null
> +++ b/arch/arm64/mm/xpfo.c
> @@ -0,0 +1,58 @@
> +/*
> + * Copyright (C) 2017 Hewlett Packard Enterprise Development, L.P.
> + * Copyright (C) 2016 Brown University. All rights reserved.
> + *
> + * Authors:
> + * Juerg Haefliger <juerg.haefliger@hpe.com>
> + * Vasileios P. Kemerlis <vpk@cs.brown.edu>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + */
> +
> +#include <linux/mm.h>
> +#include <linux/module.h>
> +
> +#include <asm/tlbflush.h>
> +
> +/*
> + * Lookup the page table entry for a virtual address and return a pointer to
> + * the entry. Based on x86 tree.
> + */
> +static pte_t *lookup_address(unsigned long addr)
The x86 also has level. Would it make sense to include that in here?
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next prev parent reply other threads:[~2019-01-23 14:23 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1547153058.git.khalid.aziz@oracle.com>
2019-01-10 21:09 ` [RFC PATCH v7 05/16] arm64/mm: Add support for XPFO Khalid Aziz
2019-01-23 14:20 ` Konrad Rzeszutek Wilk [this message]
2019-02-12 15:45 ` Khalid Aziz
2019-01-23 14:24 ` Konrad Rzeszutek Wilk
2019-02-12 15:52 ` Khalid Aziz
2019-02-12 20:01 ` Laura Abbott
2019-02-12 20:34 ` Khalid Aziz
2019-01-10 21:09 ` [RFC PATCH v7 07/16] arm64/mm, xpfo: temporarily map dcache regions Khalid Aziz
2019-01-11 14:54 ` Tycho Andersen
2019-01-11 18:28 ` Khalid Aziz
2019-01-11 19:50 ` Tycho Andersen
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 ` [RFC PATCH v7 09/16] mm: add a user_virt_to_phys symbol Khalid Aziz
2019-01-23 15:03 ` Konrad Rzeszutek Wilk
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