Re: [OE-core] linux-yocto: Set CONFIG_ATA_PIIX=y by default

[Jacob Kroon <jacob.kroon@gmail.com>]

Hi Bruce and Saul,

On 10/16/21 09:18, Jacob Kroon via lists.openembedded.org wrote:
> Hi Bruce,
> 
> My Yocto images (which uses the linux-yocto kernel) stopped booting in 
> QEMU some time ago, and after some debugging it turns out this was 
> because the upstream Linux kernel removed the legacy IDE driver. Instead 
> one should use the libata driver. However, I don't think the linux-yocto 
> kernel has builtin support for the HW that is emulated by QEMU by 
> default (PIIX), instead it is built as a module, CONFIG_ATA_PIIX=m. If I 
> set CONFIG_ATA_PIIX=y, my images boot again.
> 
> I did a "make ARCH=i386 defconfig" in Torvalds master linux tree, and 
> the .config has CONFIG_ATA_PIIX=y.
> 
> Do you think it would make sense to have the support builtin in 
> linux-yocto aswell ?
> 

I'm using KMACHINE = "common-pc". CC:ing Saul Wold, since I see that 
commit 0d4f5ed5dca41a48423ce738131e52f7863d8ca6 in yocto-kernel-cache did:

> diff --git a/bsp/common-pc/common-pc-drivers.cfg b/bsp/common-pc/common-pc-drivers.cfg
> index 71608433..0b821903 100644
> --- a/bsp/common-pc/common-pc-drivers.cfg
> +++ b/bsp/common-pc/common-pc-drivers.cfg
> @@ -5,7 +5,8 @@ CONFIG_PCI_MSI=y
>  CONFIG_ATA=y
>  CONFIG_ATA_ACPI=y
>  CONFIG_ATA_SFF=y
> -CONFIG_ATA_PIIX=y
> +CONFIG_ATA_BMDMA=y
> +CONFIG_ATA_PIIX=m
>  
>  CONFIG_INPUT=y
>  CONFIG_INPUT_MOUSEDEV=y

which changed ATA_PIIX from a builtin to a module. Maybe this wasn't 
intentional ?

Regards Jacob