From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: devicetree@vger.kernel.org, mikey@neuling.org,
herbert@gondor.apana.org.au, Haren Myneni <haren@linux.ibm.com>,
npiggin@gmail.com, hch@infradead.org, sukadev@linux.vnet.ibm.com,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests
Date: Mon, 9 Dec 2019 02:38:06 -0600 [thread overview]
Message-ID: <20191209083806.GA3152@gate.crashing.org> (raw)
In-Reply-To: <8ba807dd-9d5a-e42a-60e8-f9ad648026bf@c-s.fr>
Hi!
On Mon, Dec 09, 2019 at 06:37:09AM +0100, Christophe Leroy wrote:
> What do you mean by NX ?
It is the Power9 "Nest Accelerator". The patch series should ideally
mention that right at the start, yeah.
> Up to now, NX has been standing for No-eXecute. That's a bit in segment
> registers on book3s/32 to forbid executing code.
That bit is called just N fwiw (and not really specific to 32-bit -- on
64-bit implementations it was part of segment table entries, and of SLB
entries on newer machines).
Segher
WARNING: multiple messages have this Message-ID (diff)
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Haren Myneni <haren@linux.ibm.com>,
mpe@ellerman.id.au, hch@infradead.org, mikey@neuling.org,
npiggin@gmail.com, herbert@gondor.apana.org.au,
linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org,
sukadev@linux.vnet.ibm.com
Subject: Re: [PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests
Date: Mon, 9 Dec 2019 02:38:06 -0600 [thread overview]
Message-ID: <20191209083806.GA3152@gate.crashing.org> (raw)
In-Reply-To: <8ba807dd-9d5a-e42a-60e8-f9ad648026bf@c-s.fr>
Hi!
On Mon, Dec 09, 2019 at 06:37:09AM +0100, Christophe Leroy wrote:
> What do you mean by NX ?
It is the Power9 "Nest Accelerator". The patch series should ideally
mention that right at the start, yeah.
> Up to now, NX has been standing for No-eXecute. That's a bit in segment
> registers on book3s/32 to forbid executing code.
That bit is called just N fwiw (and not really specific to 32-bit -- on
64-bit implementations it was part of segment table entries, and of SLB
entries on newer machines).
Segher
next prev parent reply other threads:[~2019-12-09 8:41 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 3:18 [PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests Haren Myneni
2019-12-09 3:18 ` Haren Myneni
2019-12-09 3:26 ` [PATCH V2 01/13] powerpc/vas: Describe vas-port and interrupts properties Haren Myneni
2019-12-09 3:26 ` Haren Myneni
2019-12-09 3:27 ` [PATCH V2 02/13] powerpc/vas: Define nx_fault_stamp in coprocessor_request_block Haren Myneni
2019-12-09 3:27 ` Haren Myneni
2019-12-09 3:29 ` [PATCH V2 03/13] powerpc/vas: Read interrupts and vas-port device tree properties Haren Myneni
2019-12-09 3:29 ` Haren Myneni
2019-12-09 3:30 ` [PATCH V2 04/13] powerpc/vas: Setup fault window per VAS instance Haren Myneni
2019-12-09 3:30 ` Haren Myneni
2019-12-12 12:55 ` Christoph Hellwig
2019-12-12 12:55 ` Christoph Hellwig
2019-12-09 3:31 ` [PATCH V2 05/13] powerpc/vas: Setup thread IRQ handler " Haren Myneni
2019-12-09 3:31 ` Haren Myneni
2019-12-12 12:59 ` Christoph Hellwig
2019-12-12 12:59 ` Christoph Hellwig
2019-12-09 3:32 ` [PATCH V2 06/13] powerpc/vas: Register NX with fault window ID and IRQ port value Haren Myneni
2019-12-09 3:32 ` Haren Myneni
2019-12-09 3:32 ` [PATCH V2 07/13] powerpc/vas: Take reference to PID and mm for user space windows Haren Myneni
2019-12-09 3:32 ` Haren Myneni
2019-12-12 13:02 ` Christoph Hellwig
2019-12-12 13:02 ` Christoph Hellwig
2019-12-17 5:35 ` Haren Myneni
2019-12-17 5:35 ` Haren Myneni
2019-12-09 3:33 ` [PATCH V2 08/13] powerpc/vas: Update CSB and notify process for fault CRBs Haren Myneni
2019-12-09 3:33 ` Haren Myneni
2019-12-12 13:07 ` Christoph Hellwig
2019-12-12 13:07 ` Christoph Hellwig
2019-12-09 3:34 ` [PATCH V2 09/13] powerpc/vas: Print CRB and FIFO values Haren Myneni
2019-12-09 3:34 ` Haren Myneni
2019-12-09 3:34 ` [PATCH V2 10/13] powerpc/vas: Do not use default credits for receive window Haren Myneni
2019-12-09 3:34 ` Haren Myneni
2019-12-09 3:35 ` [PATCH V2 11/13] powerpc/vas: Return credits after handling fault Haren Myneni
2019-12-09 3:35 ` Haren Myneni
2019-12-09 3:36 ` [PATCH V2 12/13] powerpc/vas: Display process stuck message Haren Myneni
2019-12-09 3:36 ` Haren Myneni
2019-12-09 3:37 ` [PATCH V2 13/13] powerpc/vas: Free send window in VAS instance after credits returned Haren Myneni
2019-12-09 3:37 ` Haren Myneni
2019-12-09 5:37 ` [PATCH V2 00/13] powerpc/vas: Page fault handling for user space NX requests Christophe Leroy
2019-12-09 8:38 ` Segher Boessenkool [this message]
2019-12-09 8:38 ` Segher Boessenkool
2019-12-12 5:05 ` Haren Myneni
2019-12-12 5:05 ` Haren Myneni
2019-12-12 5:38 ` Haren Myneni
2019-12-12 5:38 ` Haren Myneni
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