linux-kernel - Re: [patch 1/7 v2] Add function efi_remap_region for remapping to saved virt address

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Date:	Mon, 18 Nov 2013 17:37:49 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Toshi Kani <toshi.kani@...com>
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, bp@...en8.de
Subject: Re: [patch 1/7 v2] Add function efi_remap_region for remapping to
 saved virt address

On 11/18/13 at 10:09am, Dave Young wrote:
> On 11/15/13 at 04:02pm, Toshi Kani wrote:
> > On Tue, 2013-11-05 at 16:20 +0800, dyoung@...hat.com wrote:
> > > Kexec kernel will use saved runtime virtual mapping, so add a
> > > new function efi_remap_region to remapping it directly without
> > > calculate the virt addr from efi_va.
> > > 
> > > The md is passed in from 1st kernel, the virtual addr is
> > > saved in md->virt_addr.
> > 
> >  :
> > 
> > > +/*
> > > + * kexec kernel will use efi_map_region_fixed to map efi
> > > + * runtime memory ranges. md->virt_addr is the original virtual
> > > + * address which had been mapped in kexec 1st kernel.
> > > + */
> > > +void __init efi_map_region_fixed(efi_memory_desc_t *md)
> > 
> > Can you simply use __map_region() instead of creating this function?
> > Both functions seem to do the same thing.  (In __map_region(), size and
> > end are not used.)
> 
> Matt also suggest to reuse __map_region in another apply, will do.

Will remove the unused variables in another patch.

--
Thanks
Dave
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