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Re: [Qemu-devel] [PATCH v5 01/11] fw_cfg: hard separation between the MM
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v5 01/11] fw_cfg: hard separation between the MMIO and I/O port mappings |
Date: |
Thu, 18 Dec 2014 14:31:33 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 18/12/2014 13:58, Peter Maydell wrote:
> On 18 December 2014 at 11:18, Paolo Bonzini <address@hidden> wrote:
>>
>>
>> On 17/12/2014 22:10, Laszlo Ersek wrote:
>>> +static Property fw_cfg_mem_properties[] = {
>>> + DEFINE_PROP_UINT64("ctl_addr", FWCfgMemState, ctl_addr, -1),
>>> + DEFINE_PROP_UINT64("data_addr", FWCfgMemState, data_addr, -1),
>>> + DEFINE_PROP_END_OF_LIST(),
>>> +};
>>> +
>>> +static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
>>> +{
>>> + FWCfgMemState *s = FW_CFG_MEM(dev);
>>> + SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
>>> +
>>> + memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops,
>>> + FW_CFG(s), "fwcfg.ctl", FW_CFG_SIZE);
>>> + sysbus_init_mmio(sbd, &s->ctl_iomem);
>>> + sysbus_mmio_map(sbd, 0, s->ctl_addr);
>>> +
>>> + memory_region_init_io(&s->data_iomem, OBJECT(s), &fw_cfg_data_mem_ops,
>>> + FW_CFG(s), "fwcfg.data", FW_CFG_DATA_SIZE);
>>> + sysbus_init_mmio(sbd, &s->data_iomem);
>>> + sysbus_mmio_map(sbd, 1, s->data_addr);
>>> +}
>>
>> Strictly speaking sysbus_mmio_map should be called by the caller, as in
>> the old fw_cfg_init---which lets you drop the properties too.
>
> I'd really rather we got this correct -- mmio_map in a realize
> function is wrong and if we merge this I'll have to immediately
> write a bug fix patch to move it out again...
Laszlo is on vacation, I'll prepare a fixup patch tomorrow.
Paolo
- [Qemu-devel] [PATCH v5 00/11] fw_cfg, bootorder, and UEFI+'-kernel' on arm/virt, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 02/11] fw_cfg: move boards to fw_cfg_init_io() / fw_cfg_init_mem(), Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 03/11] fw_cfg_mem: max access size and region size are the same for data register, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 04/11] fw_cfg_mem: flip ctl_mem_ops and data_mem_ops to DEVICE_BIG_ENDIAN, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 05/11] exec: allows 8-byte accesses in subpage_ops, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 06/11] fw_cfg_mem: introduce the "data_width" property, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 07/11] fw_cfg_mem: expose the "data_width" property with fw_cfg_init_mem_wide(), Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 08/11] arm: add fw_cfg to "virt" board, Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 09/11] hw/loader: split out load_image_gzipped_buffer(), Laszlo Ersek, 2014/12/17
- [Qemu-devel] [PATCH v5 10/11] hw/arm: pass pristine kernel image to guest firmware over fw_cfg, Laszlo Ersek, 2014/12/17