From: Paolo Bonzini <pbonzini@redhat.com>
To: Laszlo Ersek <lersek@redhat.com>,
Peter Maydell <peter.maydell@linaro.org>
Cc: Alexander Graf <agraf@suse.de>, Drew Jones <drjones@redhat.com>,
Gerd Hoffmann <kraxel@redhat.com>,
qemu devel list <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write()
Date: Wed, 31 Dec 2014 18:56:43 +0100 [thread overview]
Message-ID: <54A438DB.6090209@redhat.com> (raw)
In-Reply-To: <54A42C83.1090807@redhat.com>
On 31/12/2014 18:04, Laszlo Ersek wrote:
>
> *If* it prints the number that the guest CPU sees immediately when it
> performs the wide read, then it should print 0x0000000032cb0046, on both
> big and little endian hosts; assuming a little endian guest.
Yes.
Paolo
> Namely, the fw_cfg (sub)string in question is [0x46, 0x00, 0xcb, 0x32].
> The device is big endian, and the register accessor function should
> return the 0x4600cb32 host value in qemu. The guest CPU should see the
> same byte array [0x46, 0x00, 0xcb, 0x32], whose direct interpretation in
> the little endian guest is 0x32cb0046.
next prev parent reply other threads:[~2014-12-31 17:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-31 11:21 [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write() Laszlo Ersek
2014-12-31 13:20 ` Paolo Bonzini
2014-12-31 14:07 ` Laszlo Ersek
2014-12-31 15:17 ` Peter Maydell
2014-12-31 16:23 ` Paolo Bonzini
2014-12-31 17:04 ` Laszlo Ersek
2014-12-31 17:56 ` Paolo Bonzini [this message]
2014-12-31 17:29 ` Peter Maydell
2014-12-31 19:25 ` Paolo Bonzini
2014-12-31 19:32 ` Laszlo Ersek
2014-12-31 16:27 ` Laszlo Ersek
2014-12-31 17:17 ` Peter Maydell
2014-12-31 17:37 ` Peter Maydell
2014-12-31 17:59 ` Laszlo Ersek
2014-12-31 18:08 ` Ard Biesheuvel
2014-12-31 18:25 ` Peter Maydell
2015-01-01 10:27 ` Ard Biesheuvel
2014-12-31 18:26 ` Laszlo Ersek
2014-12-31 17:44 ` Peter Maydell
2014-12-31 17:58 ` Laszlo Ersek
2014-12-31 18:22 ` Laszlo Ersek
2015-01-05 15:24 ` Peter Maydell
2015-01-05 15:33 ` Laszlo Ersek
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