linux-kernel - Re: [PATCH v2 02/11] xen/hvmlite: Bootstrap HVMlite guest

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Message-ID: <20160425134749.GB28454@pd.tnic>
Date:	Mon, 25 Apr 2016 15:47:49 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>, david.vrabel@...rix.com,
	konrad.wilk@...cle.com, xen-devel@...ts.xenproject.org,
	linux-kernel@...r.kernel.org, roger.pau@...rix.com, mcgrof@...e.com
Subject: Re: [PATCH v2 02/11] xen/hvmlite: Bootstrap HVMlite guest

On Mon, Apr 25, 2016 at 09:21:27AM -0400, Boris Ostrovsky wrote:
> I was following  Documentation/x86/boot.txt (plus comments in code preceding
> those two routines) which I considered to be the API.
> 
> We are supposed to come to startup_32 with paging off and %esi pointing to
> boot_params. For 64-bit paging is on, %rsi points to zero-page.

So the entry points which are ABI and the ones I believe you're talking
about are in arch/x86/boot/compressed/head_64.S. But you have all this
stuff laid out in arch/x86/xen/ and I don't see you using the entry
points in boot/compressed/. It looks more to me that you're using the
ones in arch/x86/kernel/head_{32,64}.S after decompression.

Or am I missing something?

-- 
Regards/Gruss,
    Boris.

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