On 06/17/16 at 05:51pm, Thiago Jung Bauermann wrote:
> Am Freitag, 17 Juni 2016, 15:35:23 schrieb Dave Young:
> > On 06/16/16 at 05:39pm, Thiago Jung Bauermann wrote:
> > > Am Donnerstag, 16 Juni 2016, 09:58:53 schrieb Dave Young:
> > > > On 06/15/16 at 01:21pm, Thiago Jung Bauermann wrote:
> > > > > +int __weak arch_kexec_walk_mem(unsigned int image_type, bool
> > > > > top_down,
> > > > > + void *data, int (*func)(u64, u64, void *))
> > > > > +{
> > > >
> > > > top_down is also not used?
> > >
> > > It's unused in the default implementation, but the powerpc implementation
> > > in patch 8 uses it:
> > Well, arch_kexec_walk_mem use kbuf as "data", you can even drop
> > "image_type" since kbuf has all you want kbuf->image->type, and
> > kbuf->top_down
> >
> > int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf,
> > int (*func)(u64, u64, void *))
>
> Sounds good to me, but I had to move struct kexec_buf from
> kernel/kexec_internal.h to include/linux/kexec.h.
>
> Here's the updated patch. What do you think?
>
> []'s
> Thiago Jung Bauermann
> IBM Linux Technology Center
>
>
> kexec_file: Generalize kexec_add_buffer.
>
> Allow architectures to specify different memory walking functions for
> kexec_add_buffer. Intel uses iomem to track reserved memory ranges,
> but PowerPC uses the memblock subsystem.
>
> Signed-off-by: Thiago Jung Bauermann <bauerman at linux.vnet.ibm.com>
> Cc: Eric Biederman <ebiederm at xmission.com>
> Cc: Dave Young <dyoung at redhat.com>
> Cc: kexec at lists.infradead.org
> Cc: linux-kernel at vger.kernel.org
>
> diff --git a/include/linux/kexec.h b/include/linux/kexec.h
> index e8acb2b43dd9..d8df01107ae2 100644
> --- a/include/linux/kexec.h
> +++ b/include/linux/kexec.h
> @@ -201,6 +201,20 @@ struct kimage {
> #endif
> };
>
> +/*
> + * Keeps track of buffer parameters as provided by caller for requesting
> + * memory placement of buffer.
> + */
> +struct kexec_buf {
> + struct kimage *image;
> + unsigned long mem;
> + unsigned long memsz;
> + unsigned long buf_align;
> + unsigned long buf_min;
> + unsigned long buf_max;
> + bool top_down; /* allocate from top of memory hole */
> +};
> +
kexec_buf should go within #ifdef for kexec file like struct purgatory_info
Other than that it looks good.
Thanks
Dave
