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Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read(
From: |
Paolo Bonzini |
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 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
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.
- [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Laszlo Ersek, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Laszlo Ersek, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Peter Maydell, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Peter Maydell, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Laszlo Ersek, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Ard Biesheuvel, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Peter Maydell, 2014/12/31
- Re: [Qemu-devel] [PATCH] fw_cfg: fix endianness in fw_cfg_data_mem_read() / _write(), Laszlo Ersek, 2014/12/31