From: Dave Hansen <dave.hansen@intel.com>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>
Subject: Re: [PATCH v6 1/2] arm64: Define Documentation/arm64/tagged-address-abi.rst
Date: Wed, 31 Jul 2019 09:43:46 -0700 [thread overview]
Message-ID: <b74e7ce7-d58a-68a0-2f28-6648ec6302c0@intel.com> (raw)
In-Reply-To: <20190725135044.24381-2-vincenzo.frascino@arm.com>
On 7/25/19 6:50 AM, Vincenzo Frascino wrote:
> With the relaxed ABI proposed through this document, it is now possible
> to pass tagged pointers to the syscalls, when these pointers are in
> memory ranges obtained by an anonymous (MAP_ANONYMOUS) mmap().
I don't see a lot of description of why this restriction is necessary.
What's the problem with supporting MAP_SHARED?
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave.hansen@intel.com>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Szabolcs Nagy <szabolcs.nagy@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: Re: [PATCH v6 1/2] arm64: Define Documentation/arm64/tagged-address-abi.rst
Date: Wed, 31 Jul 2019 09:43:46 -0700 [thread overview]
Message-ID: <b74e7ce7-d58a-68a0-2f28-6648ec6302c0@intel.com> (raw)
In-Reply-To: <20190725135044.24381-2-vincenzo.frascino@arm.com>
On 7/25/19 6:50 AM, Vincenzo Frascino wrote:
> With the relaxed ABI proposed through this document, it is now possible
> to pass tagged pointers to the syscalls, when these pointers are in
> memory ranges obtained by an anonymous (MAP_ANONYMOUS) mmap().
I don't see a lot of description of why this restriction is necessary.
What's the problem with supporting MAP_SHARED?
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next prev parent reply other threads:[~2019-07-31 16:43 UTC|newest]
Thread overview: 175+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-23 17:58 [PATCH v19 00/15] arm64: untag user pointers passed to the kernel Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 01/15] arm64: untag user pointers in access_ok and __uaccess_mask_ptr Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 02/15] arm64: Introduce prctl() options to control the tagged user addresses ABI Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-31 17:05 ` Dave Hansen
2019-07-31 17:05 ` Dave Hansen
2019-07-31 17:05 ` Dave Hansen
2019-08-01 12:38 ` Kevin Brodsky
2019-08-01 12:38 ` Kevin Brodsky
2019-08-01 12:38 ` Kevin Brodsky
2019-08-01 16:45 ` Dave Hansen
2019-08-01 16:45 ` Dave Hansen
2019-08-01 16:45 ` Dave Hansen
2019-08-02 10:50 ` Catalin Marinas
2019-08-02 10:50 ` Catalin Marinas
2019-08-02 10:50 ` Catalin Marinas
2019-08-09 16:08 ` Catalin Marinas
2019-08-09 16:08 ` Catalin Marinas
2019-08-09 16:08 ` Catalin Marinas
2019-07-23 17:58 ` [PATCH v19 03/15] lib: untag user pointers in strn*_user Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 04/15] mm: untag user pointers passed to memory syscalls Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-08-09 16:03 ` Catalin Marinas
2019-08-09 16:03 ` Catalin Marinas
2019-08-09 16:03 ` Catalin Marinas
2019-07-23 17:58 ` [PATCH v19 05/15] mm: untag user pointers in mm/gup.c Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 06/15] mm: untag user pointers in get_vaddr_frames Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 07/15] fs/namespace: untag user pointers in copy_mount_options Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 08/15] userfaultfd: untag user pointers Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 09/15] drm/amdgpu: " Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 10/15] drm/radeon: untag user pointers in radeon_gem_userptr_ioctl Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 11/15] IB/mlx4: untag user pointers in mlx4_get_umem_mr Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-24 19:25 ` Jason Gunthorpe
2019-07-24 19:25 ` Jason Gunthorpe
2019-07-24 19:25 ` Jason Gunthorpe
2019-07-25 11:17 ` Andrey Konovalov
2019-07-25 11:17 ` Andrey Konovalov
2019-07-25 11:17 ` Andrey Konovalov
2019-07-25 11:17 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 12/15] media/v4l2-core: untag user pointers in videobuf_dma_contig_user_get Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 13/15] tee/shm: untag user pointers in tee_shm_register Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 14/15] vfio/type1: untag user pointers in vaddr_get_pfn Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` [PATCH v19 15/15] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 17:58 ` Andrey Konovalov
2019-07-23 18:03 ` [PATCH v19 00/15] arm64: untag user pointers passed to the kernel Andrey Konovalov
2019-07-23 18:03 ` Andrey Konovalov
2019-07-23 18:03 ` Andrey Konovalov
2019-07-23 18:03 ` Andrey Konovalov
2019-07-24 14:02 ` Will Deacon
2019-07-24 14:02 ` Will Deacon
2019-07-24 14:02 ` Will Deacon
2019-07-24 14:02 ` Will Deacon
2019-07-24 14:16 ` Andrey Konovalov
2019-07-24 14:16 ` Andrey Konovalov
2019-07-24 14:16 ` Andrey Konovalov
2019-07-24 14:16 ` Andrey Konovalov
2019-07-24 14:20 ` Will Deacon
2019-07-24 14:20 ` Will Deacon
2019-07-24 14:20 ` Will Deacon
2019-07-24 14:20 ` Will Deacon
2019-07-24 17:12 ` Vincenzo Frascino
2019-07-24 17:12 ` Vincenzo Frascino
2019-07-24 17:12 ` Vincenzo Frascino
2019-07-24 17:12 ` Vincenzo Frascino
2019-08-06 17:13 ` Will Deacon
2019-08-06 17:13 ` Will Deacon
2019-08-06 17:13 ` Will Deacon
2019-08-06 17:13 ` Will Deacon
2019-08-07 17:17 ` Andrey Konovalov
2019-08-07 17:17 ` Andrey Konovalov
2019-08-07 17:17 ` Andrey Konovalov
2019-08-07 17:17 ` Andrey Konovalov
2019-08-08 21:12 ` Kees Cook
2019-08-08 21:12 ` Kees Cook
2019-08-08 21:12 ` Kees Cook
2019-08-08 21:12 ` Kees Cook
2019-08-08 22:33 ` Andrew Morton
2019-08-08 22:33 ` Andrew Morton
2019-08-08 22:33 ` Andrew Morton
2019-08-08 22:33 ` Andrew Morton
2019-08-08 23:09 ` Kees Cook
2019-08-08 23:09 ` Kees Cook
2019-08-08 23:09 ` Kees Cook
2019-08-08 23:09 ` Kees Cook
2019-08-09 9:00 ` Catalin Marinas
2019-08-09 9:00 ` Catalin Marinas
2019-08-09 9:00 ` Catalin Marinas
2019-08-09 9:00 ` Catalin Marinas
2019-08-09 9:28 ` Dave Martin
2019-08-09 9:28 ` Dave Martin
2019-08-09 9:28 ` Dave Martin
2019-08-09 9:28 ` Dave Martin
2019-07-25 13:50 ` [PATCH v6 0/2] arm64 relaxed ABI Vincenzo Frascino
2019-07-25 13:50 ` Vincenzo Frascino
2019-07-25 13:50 ` [PATCH v6 1/2] arm64: Define Documentation/arm64/tagged-address-abi.rst Vincenzo Frascino
2019-07-25 13:50 ` Vincenzo Frascino
2019-07-30 10:32 ` Kevin Brodsky
2019-07-30 10:32 ` Kevin Brodsky
2019-07-30 13:25 ` Vincenzo Frascino
2019-07-30 13:25 ` Vincenzo Frascino
2019-07-30 13:57 ` Kevin Brodsky
2019-07-30 13:57 ` Kevin Brodsky
2019-07-30 14:24 ` Vincenzo Frascino
2019-07-30 14:24 ` Vincenzo Frascino
2019-07-30 14:48 ` Kevin Brodsky
2019-07-30 14:48 ` Kevin Brodsky
2019-07-31 16:43 ` Dave Hansen [this message]
2019-07-31 16:43 ` Dave Hansen
2019-08-02 10:08 ` Catalin Marinas
2019-08-02 10:08 ` Catalin Marinas
2019-07-25 13:50 ` [PATCH v6 2/2] arm64: Relax Documentation/arm64/tagged-pointers.rst Vincenzo Frascino
2019-07-25 13:50 ` Vincenzo Frascino
2019-07-31 16:50 ` [PATCH v19 00/15] arm64: untag user pointers passed to the kernel Dave Hansen
2019-07-31 16:50 ` Dave Hansen
2019-07-31 16:50 ` Dave Hansen
2019-08-01 12:11 ` Kevin Brodsky
2019-08-01 12:11 ` Kevin Brodsky
2019-08-01 12:11 ` Kevin Brodsky
2019-08-01 12:48 ` Andrey Konovalov
2019-08-01 12:48 ` Andrey Konovalov
2019-08-01 12:48 ` Andrey Konovalov
2019-08-01 12:48 ` Andrey Konovalov
2019-08-01 15:36 ` Dave Hansen
2019-08-01 15:36 ` Dave Hansen
2019-08-01 15:36 ` Dave Hansen
2019-08-01 15:36 ` Dave Hansen
2019-08-02 10:20 ` Catalin Marinas
2019-08-02 10:20 ` Catalin Marinas
2019-08-02 10:20 ` Catalin Marinas
2019-08-02 10:20 ` Catalin Marinas
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