From: Paolo Bonzini <pbonzini@redhat.com>
To: Laszlo Ersek <lersek@redhat.com>, Andrew Jones <drjones@redhat.com>
Cc: peter.maydell@linaro.org, Alexander Graf <agraf@suse.de>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v4 1/8] fw_cfg: max access size and region size are the same for MMIO data reg
Date: Wed, 17 Dec 2014 10:23:17 +0100 [thread overview]
Message-ID: <54914B85.7070605@redhat.com> (raw)
In-Reply-To: <54910F67.2000804@redhat.com>
On 17/12/2014 06:06, Laszlo Ersek wrote:
>> > That said, the standalone selector is used by BE platforms only, so we
>> > know that the standalone selector is always DEVICE_BIG_ENDIAN.
> This series exposes the standalone selector (as MMIO) to ARM guests as
> well; and in "Documentation/devicetree/bindings/arm/fw-cfg.txt" for the
> kernel I'm saying that the selector is little endian.
>
> Therefore I think that the standalone selector is not only (going to be)
> used by BE platforms (or I don't understand your above statement
> correctly).
It's not going to be used only by BE platforms. But so far it is used
by BE platforms only. If you want to keep everything consistent, you
can make it (and the wide datum) BE; and swizzle data in the firmware.
Otherwise, NATIVE_ENDIAN is fine.
> In other words, the standalone selector is NATIVE_ENDIAN, but in the
> description of the *ARM* bindings, we can simply say that it's little
> endian.
Yes.
Paolo
next prev parent reply other threads:[~2014-12-17 9:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 15:58 [Qemu-devel] [PATCH v4 0/8] fw_cfg, bootorder, and UEFI+'-kernel' on arm/virt Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 1/8] fw_cfg: max access size and region size are the same for MMIO data reg Laszlo Ersek
2014-12-16 13:48 ` Andrew Jones
2014-12-16 19:00 ` Laszlo Ersek
2014-12-16 19:49 ` Paolo Bonzini
2014-12-16 20:06 ` Laszlo Ersek
2014-12-16 20:17 ` Laszlo Ersek
2014-12-16 21:47 ` Paolo Bonzini
2014-12-17 4:52 ` Laszlo Ersek
2014-12-16 20:40 ` Paolo Bonzini
2014-12-16 21:47 ` Peter Maydell
2014-12-17 5:06 ` Laszlo Ersek
2014-12-17 9:23 ` Paolo Bonzini [this message]
2014-12-17 9:31 ` Alexander Graf
2014-12-16 20:41 ` Peter Maydell
2014-12-17 7:13 ` Laszlo Ersek
2014-12-17 8:28 ` Alexander Graf
2014-12-17 8:40 ` Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 2/8] fw_cfg: generalize overlap check for combining control and data I/O ports Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 3/8] fw_cfg: introduce the "data_memwidth" property Laszlo Ersek
2014-12-16 12:06 ` Alexander Graf
2014-12-16 12:42 ` Laszlo Ersek
2014-12-16 16:59 ` Laszlo Ersek
2014-12-16 17:10 ` Peter Maydell
2014-12-16 17:20 ` Alexander Graf
2014-12-16 18:52 ` Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 4/8] fw_cfg: expose the "data_memwidth" prop with fw_cfg_init_data_memwidth() Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 5/8] arm: add fw_cfg to "virt" board Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 6/8] hw/loader: split out load_image_gzipped_buffer() Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 7/8] hw/arm: pass pristine kernel image to guest firmware over fw_cfg Laszlo Ersek
2014-12-16 12:15 ` Alexander Graf
2014-12-16 12:18 ` Peter Maydell
2014-12-16 12:20 ` Alexander Graf
2014-12-16 12:25 ` Peter Maydell
2014-12-16 12:42 ` Richard W.M. Jones
2014-12-16 12:44 ` Laszlo Ersek
2014-12-12 15:58 ` [Qemu-devel] [PATCH v4 8/8] hw/arm/virt: enable passing of EFI-stubbed kernel to guest UEFI firmware Laszlo Ersek
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