From: Paolo Bonzini <pbonzini@redhat.com>
To: Markus Armbruster <armbru@redhat.com>,
Peter Maydell <peter.maydell@linaro.org>
Cc: Peter Crosthwaite <crosthwaitepeter@gmail.com>,
Alistair Francis <alistair.francis@xilinx.com>,
Christopher Covington <cov@codeaurora.org>,
"qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v11 0/8] Add a generic loader
Date: Fri, 23 Sep 2016 10:18:04 +0200 [thread overview]
Message-ID: <7046636c-a89b-2991-083f-bf73bb29f070@redhat.com> (raw)
In-Reply-To: <87ponvxcit.fsf@dusky.pond.sub.org>
On 23/09/2016 10:10, Markus Armbruster wrote:
> For me, the similarity (at the conceptual level) to the persistent
> memory case is striking: in both cases, we need a backend to manage
> memory contents. The difference is that for persistent memory, changes
> persist, while for the loader, they get reverted at reset.
Not just that. For persistent memory, there is a MemoryRegion
corresponding to the memory _and_ an interface to manage it.
For the loader the contents are copied every time from an out-of-band
storage.
> An argument for using -device could go as follows: this is a device to
> monkey patch memory. It needs a backend to manage the bits, just like
> other memory-related devices do. Since its backend is trivial, we
> folded it in rather than make it a separate backend.
The backend is not just trivial, it is _literally_ a 64-bit value... I
think "-object long,value=0x123456789abcdef0 is taking things a bit too far.
Paolo
> If we decide to use this argument for the present interface design, I
> want it recorded in the code and commit messages.
next prev parent reply other threads:[~2016-09-23 8:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-20 14:54 [Qemu-devel] [PATCH v11 0/8] Add a generic loader Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 1/8] loader: Allow ELF loader to auto-detect the ELF arch Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 2/8] loader: Use the specified MemoryRegion Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 3/8] loader: Allow a custom AddressSpace when loading ROMs Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 4/8] loader: Add AddressSpace loading support to ELFs Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 5/8] loader: Add AddressSpace loading support to uImages Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 6/8] loader: Add AddressSpace loading support to targphys Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 7/8] generic-loader: Add a generic loader Alistair Francis
2016-09-20 14:54 ` [Qemu-devel] [PATCH v11 8/8] docs: Add a generic loader explanation document Alistair Francis
2016-09-20 17:41 ` [Qemu-devel] [PATCH v11 0/8] Add a generic loader Peter Maydell
2016-09-20 18:22 ` Alistair Francis
2016-09-21 6:05 ` Markus Armbruster
2016-09-21 15:46 ` Alistair Francis
2016-09-21 15:53 ` Paolo Bonzini
2016-09-22 9:19 ` Markus Armbruster
2016-09-22 9:22 ` Paolo Bonzini
2016-09-22 11:50 ` Markus Armbruster
2016-09-22 14:01 ` Peter Maydell
2016-09-23 8:10 ` Markus Armbruster
2016-09-23 8:18 ` Paolo Bonzini [this message]
2016-09-27 13:28 ` Markus Armbruster
2016-09-27 14:14 ` Paolo Bonzini
2016-09-27 15:40 ` Markus Armbruster
2016-09-27 16:24 ` Alistair Francis
2016-09-28 2:04 ` Markus Armbruster
2016-09-28 22:48 ` Alistair Francis
2016-09-27 15:17 ` Peter Maydell
2016-09-21 15:54 ` Daniel P. Berrange
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