linux-kernel - Re: [PATCH v4 2/2] arm64: kexec

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Message-ID: <20200110160549.GA25437@willie-the-truck>
Date:   Fri, 10 Jan 2020 16:05:49 +0000
From:   Will Deacon <will@...nel.org>
To:     AKASHI Takahiro <takahiro.akashi@...aro.org>,
        pasha.tatashin@...een.com, catalin.marinas@....com,
        will.deacon@....com, robh+dt@...nel.org, frowand.list@...il.com,
        bhsharma@...hat.com, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org, james.morse@....com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 2/2] arm64: kexec_file: add crash dump support

On Thu, Jan 09, 2020 at 08:32:54AM +0000, Will Deacon wrote:
> On Thu, Jan 09, 2020 at 09:46:55AM +0900, AKASHI Takahiro wrote:
> > On Wed, Jan 08, 2020 at 05:48:39PM +0000, Will Deacon wrote:
> > > On Mon, Dec 16, 2019 at 11:12:47AM +0900, AKASHI Takahiro wrote:
> > > > diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
> > > > index 12a561a54128..d24b527e8c00 100644
> > > > --- a/arch/arm64/include/asm/kexec.h
> > > > +++ b/arch/arm64/include/asm/kexec.h
> > > > @@ -96,6 +96,10 @@ static inline void crash_post_resume(void) {}
> > > >  struct kimage_arch {
> > > >  	void *dtb;
> > > >  	unsigned long dtb_mem;
> > > > +	/* Core ELF header buffer */
> > > > +	void *elf_headers;
> > > > +	unsigned long elf_headers_mem;
> > > > +	unsigned long elf_headers_sz;
> > > >  };
> > > 
> > > This conflicts with the cleanup work from Pavel. Please can you check my
> > > resolution? [1]
> > 
> > I don't know why we need to change a type of dtb_mem,
> > otherwise it looks good.
> > 
> > (I also assume that you notice that kimage_arch is of no use for kexec.)
> 
> Yes, that's why I'd like the resolution checked. If you reckon it's cleaner
> to drop Pavel's patch altogether in light of your changes, we can do that
> instead.
> 
> Thoughts?

Well, I've reverted the cleanup patch so please shout if you'd prefer
something else.

Will