Re: [U-Boot] [PATCH v6 0/8] x86: qemu: add fw_cfg interface support for qemu-x86 targets

2016-01-11 Thread Miao Yan 
Hi Bin,

2016-01-07 17:31 GMT+08:00 Miao Yan :
> The fw_cfg interface provided by QEMU allow guests to retrieve various 
> information
> about the system, e.g. cpu number, variaous firmware data, kernel setup, etc. 
> The
> fw_cfg interface can be accessed through 3 IO ports (on x86), using x86 in/out
> instructions.
>
>   - 0x510: select configuration items to access
>   - 0x511: reading this port will return data selected in 0x510
>   - 0x514: this can be used to detect if DMA interface is available
>
> If fw_cfg DMA interface is available, it can be used to accelerate
> accesses.
>
> This patchset adds the following supports for qemu-x86 targets:
>
>   + the fw_cfg driver itself
>
>   + add a U-Boot command 'fw' to support direct accessing kernel informtion
> from fw_cfg interface, this saves the time of loading them from hard disk 
> or
> network again, through emulated devices.
>
>   + use fw_cfg to get cpu number at runtime, so smp boot no longer relies on
> the cpu node hard-coded in dts files.
>
> Changes in v6:
>   - fix oneline comment
>   - do not update bootargs when kernel cmdline only contains '\0'
>
> Miao Yan (8):
>   x86: adjust ramdisk load address
>   x86: qemu: add fw_cfg support
>   x86: qemu: add a cpu uclass driver for qemu target
>   x86: fix a typo in function name
>   x86: use actual CPU number for allocating memory
>   x86: qemu: fix cpu device in smp boot
>   x86: qemu: remove cpu node in device tree
>   x86: qemu: add documentaion for the fw_cfg interface
>
>  arch/x86/cpu/mp_init.c   |  84 +++-
>  arch/x86/cpu/qemu/Makefile   |   2 +-
>  arch/x86/cpu/qemu/cpu.c  |  46 +++
>  arch/x86/cpu/qemu/fw_cfg.c   | 283 
> +++
>  arch/x86/cpu/qemu/qemu.c |   3 +
>  arch/x86/dts/qemu-x86_i440fx.dts |   9 +-
>  arch/x86/dts/qemu-x86_q35.dts|   9 +-
>  arch/x86/include/asm/fw_cfg.h|  93 +
>  doc/README.x86   |  34 -
>  include/configs/x86-common.h |   3 +-
>  10 files changed, 539 insertions(+), 27 deletions(-)
>  create mode 100644 arch/x86/cpu/qemu/cpu.c
>  create mode 100644 arch/x86/cpu/qemu/fw_cfg.c
>  create mode 100644 arch/x86/include/asm/fw_cfg.h
>
> --
> 1.9.1
>

Is v6 OK for integration ? Thanks.
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Re: [U-Boot] [PATCH v6 0/8] x86: qemu: add fw_cfg interface support for qemu-x86 targets

2016-01-11 Thread Bin Meng 
Hi Miao,

On Tue, Jan 12, 2016 at 10:04 AM, Miao Yan  wrote:
> Hi Bin,
>
> 2016-01-07 17:31 GMT+08:00 Miao Yan :
>> The fw_cfg interface provided by QEMU allow guests to retrieve various 
>> information
>> about the system, e.g. cpu number, variaous firmware data, kernel setup, 
>> etc. The
>> fw_cfg interface can be accessed through 3 IO ports (on x86), using x86 
>> in/out
>> instructions.
>>
>>   - 0x510: select configuration items to access
>>   - 0x511: reading this port will return data selected in 0x510
>>   - 0x514: this can be used to detect if DMA interface is available
>>
>> If fw_cfg DMA interface is available, it can be used to accelerate
>> accesses.
>>
>> This patchset adds the following supports for qemu-x86 targets:
>>
>>   + the fw_cfg driver itself
>>
>>   + add a U-Boot command 'fw' to support direct accessing kernel informtion
>> from fw_cfg interface, this saves the time of loading them from hard 
>> disk or
>> network again, through emulated devices.
>>
>>   + use fw_cfg to get cpu number at runtime, so smp boot no longer relies on
>> the cpu node hard-coded in dts files.
>>
>> Changes in v6:
>>   - fix oneline comment
>>   - do not update bootargs when kernel cmdline only contains '\0'
>>
>> Miao Yan (8):
>>   x86: adjust ramdisk load address
>>   x86: qemu: add fw_cfg support
>>   x86: qemu: add a cpu uclass driver for qemu target
>>   x86: fix a typo in function name
>>   x86: use actual CPU number for allocating memory
>>   x86: qemu: fix cpu device in smp boot
>>   x86: qemu: remove cpu node in device tree
>>   x86: qemu: add documentaion for the fw_cfg interface
>>
>>  arch/x86/cpu/mp_init.c   |  84 +++-
>>  arch/x86/cpu/qemu/Makefile   |   2 +-
>>  arch/x86/cpu/qemu/cpu.c  |  46 +++
>>  arch/x86/cpu/qemu/fw_cfg.c   | 283 
>> +++
>>  arch/x86/cpu/qemu/qemu.c |   3 +
>>  arch/x86/dts/qemu-x86_i440fx.dts |   9 +-
>>  arch/x86/dts/qemu-x86_q35.dts|   9 +-
>>  arch/x86/include/asm/fw_cfg.h|  93 +
>>  doc/README.x86   |  34 -
>>  include/configs/x86-common.h |   3 +-
>>  10 files changed, 539 insertions(+), 27 deletions(-)
>>  create mode 100644 arch/x86/cpu/qemu/cpu.c
>>  create mode 100644 arch/x86/cpu/qemu/fw_cfg.c
>>  create mode 100644 arch/x86/include/asm/fw_cfg.h
>>
>> --
>> 1.9.1
>>
>
> Is v6 OK for integration ? Thanks.

Yes, will be applied soon.

Regards,
Bin
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[U-Boot] [PATCH v6 0/8] x86: qemu: add fw_cfg interface support for qemu-x86 targets

2016-01-07 Thread Miao Yan 
The fw_cfg interface provided by QEMU allow guests to retrieve various 
information
about the system, e.g. cpu number, variaous firmware data, kernel setup, etc. 
The
fw_cfg interface can be accessed through 3 IO ports (on x86), using x86 in/out
instructions.

  - 0x510: select configuration items to access
  - 0x511: reading this port will return data selected in 0x510 
  - 0x514: this can be used to detect if DMA interface is available

If fw_cfg DMA interface is available, it can be used to accelerate
accesses.

This patchset adds the following supports for qemu-x86 targets: 

  + the fw_cfg driver itself

  + add a U-Boot command 'fw' to support direct accessing kernel informtion
from fw_cfg interface, this saves the time of loading them from hard disk or
network again, through emulated devices.

  + use fw_cfg to get cpu number at runtime, so smp boot no longer relies on
the cpu node hard-coded in dts files.

Changes in v6:
  - fix oneline comment
  - do not update bootargs when kernel cmdline only contains '\0'

Miao Yan (8):
  x86: adjust ramdisk load address
  x86: qemu: add fw_cfg support
  x86: qemu: add a cpu uclass driver for qemu target
  x86: fix a typo in function name
  x86: use actual CPU number for allocating memory
  x86: qemu: fix cpu device in smp boot
  x86: qemu: remove cpu node in device tree
  x86: qemu: add documentaion for the fw_cfg interface

 arch/x86/cpu/mp_init.c   |  84 +++-
 arch/x86/cpu/qemu/Makefile   |   2 +-
 arch/x86/cpu/qemu/cpu.c  |  46 +++
 arch/x86/cpu/qemu/fw_cfg.c   | 283 +++
 arch/x86/cpu/qemu/qemu.c |   3 +
 arch/x86/dts/qemu-x86_i440fx.dts |   9 +-
 arch/x86/dts/qemu-x86_q35.dts|   9 +-
 arch/x86/include/asm/fw_cfg.h|  93 +
 doc/README.x86   |  34 -
 include/configs/x86-common.h |   3 +-
 10 files changed, 539 insertions(+), 27 deletions(-)
 create mode 100644 arch/x86/cpu/qemu/cpu.c
 create mode 100644 arch/x86/cpu/qemu/fw_cfg.c
 create mode 100644 arch/x86/include/asm/fw_cfg.h

-- 
1.9.1

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