From: Florian Weimer <fweimer@redhat.com>
To: Ram Pai <linuxram@us.ibm.com>
Cc: linux-arch <linux-arch@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
Linux API <linux-api@vger.kernel.org>, X86 ML <x86@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
linux-x86_64@vger.kernel.org, Andy Lutomirski <luto@kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH] pkeys: Introduce PKEY_ALLOC_SIGNALINHERIT and change signal semantics
Date: Thu, 17 May 2018 12:11:15 +0200 [thread overview]
Message-ID: <9c7b1c17-5c0e-11aa-0803-a0f503087b37@redhat.com> (raw)
In-Reply-To: <20180516203534.GA5479@ram.oc3035372033.ibm.com>
On 05/16/2018 10:35 PM, Ram Pai wrote:
> So let me see if I understand the overall idea.
>
> Application can allocate new keys through a new syscall
> sys_pkey_alloc_1(flags, init_val, sig_init_val)
>
> 'sig_init_val' is the permission-state of the key in signal context.
I would keep the existing system call and just add a flag, say
PKEY_ALLOC_SETSIGNAL. If the current thread needs different access
rights, it can set those rights just after pkey_alloc returns. There is
no race that matters here, I think.
Thanks,
Florian
prev parent reply other threads:[~2018-05-17 10:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180502132751.05B9F401F3041@oldenburg.str.redhat.com>
[not found] ` <248faadb-e484-806f-1485-c34a72a9ca0b@intel.com>
[not found] ` <822a28c9-5405-68c2-11bf-0c282887466d@redhat.com>
[not found] ` <20180502211254.GA5863@ram.oc3035372033.ibm.com>
[not found] ` <CALCETrUfO=vXg5rT-n=y8pLktcq5+ORvgpsOXCHG4GaugB3k2A@mail.gmail.com>
2018-05-02 23:38 ` [PATCH] pkeys: Introduce PKEY_ALLOC_SIGNALINHERIT and change signal semantics Ram Pai
2018-05-07 9:47 ` Florian Weimer
[not found] ` <57459C6F-C8BA-4E2D-99BA-64F35C11FC05@amacapital.net>
[not found] ` <6286ba0a-7e09-b4ec-e31f-bd091f5940ff@redhat.com>
[not found] ` <CALCETrVrm6yGiv6_z7RqdeB-324RoeMmjpf1EHsrGOh+iKb7+A@mail.gmail.com>
[not found] ` <b2df1386-9df9-2db8-0a25-51bf5ff63592@redhat.com>
[not found] ` <CALCETrW_Dt-HoG4keFJd8DSD=tvyR+bBCFrBDYdym4GQbfng4A@mail.gmail.com>
[not found] ` <20180503021058.GA5670@ram.oc3035372033.ibm.com>
[not found] ` <CALCETrXRQF08exQVZqtTLOKbC8Ywq5x4EYH_1D7r5v9bdOSwbg@mail.gmail.com>
[not found] ` <927c8325-4c98-d7af-b921-6aafcf8fe992@redhat.com>
2018-05-08 2:49 ` Andy Lutomirski
2018-05-08 12:40 ` Florian Weimer
2018-05-09 14:41 ` Andy Lutomirski
2018-05-14 12:01 ` Florian Weimer
2018-05-14 15:32 ` Andy Lutomirski
2018-05-14 15:34 ` Florian Weimer
2018-05-16 17:01 ` Dave Hansen
2018-05-16 20:52 ` Ram Pai
2018-05-16 20:54 ` Andy Lutomirski
2018-05-16 20:35 ` Ram Pai
2018-05-16 20:37 ` Andy Lutomirski
2018-05-16 21:07 ` Ram Pai
2018-05-17 10:09 ` Florian Weimer
2018-05-17 10:11 ` Florian Weimer [this message]
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