Kernel 4.7: PAGE_GUARDED and _PAGE_NO_CACHE

[Christian Zigotzky]

Michael,

Thank you for your patch. I was able to compile the kernel but 
unfortunately it doesn't boot.

Do you have another hint or patch for me?

Thanks in advance,

Christian

On 09 June 2016 at 1:15 PM, Michael Ellerman wrote:
> On Thu, 2016-06-09 at 10:48 +0200, Christian Zigotzky wrote:
>
>> Shall I modify the workaround? Is the workaround for lack of the device
>> tree the problem?
> I don't think so.
>
> You could try this patch to try and isolate it:
>
> diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
> index 88a5ecaa157b..ae2f2705e8a0 100644
> --- a/arch/powerpc/include/asm/book3s/64/pgtable.h
> +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
> @@ -251,7 +251,7 @@ extern unsigned long ioremap_bot;
>    *  PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces
>    * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE
>    */
> -#define KERN_IO_START	(KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
> +#define KERN_IO_START	(H_KERN_VIRT_START + (H_KERN_VIRT_SIZE >> 1))
>   #define FULL_IO_SIZE	0x80000000ul
>   #define  ISA_IO_BASE	(KERN_IO_START)
>   #define  ISA_IO_END	(KERN_IO_START + 0x10000ul)
>
>
> cheers
>
>