Re: [tip:x86/boot] x86/boot/compressed/64: Prepare trampoline memory
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- Subject: Re: [tip:x86/boot] x86/boot/compressed/64: Prepare trampoline memory
- From: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
- Date: Mon, 26 Feb 2018 11:15:34 +0300
- Cc: Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxx>, tglx@xxxxxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, willy@xxxxxxxxxxxxx, hpa@xxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, luto@xxxxxxxxxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx
- In-reply-to: <20180226080256.j7jzuxyokx42uytd@node.shutemov.name>
- References: <20180209142228.21231-4-kirill.shutemov@linux.intel.com> <tip-b91993a87aff6dafd60a9c8ce80ebc425161a815@git.kernel.org> <20180224214818.GD29374@pd.tnic> <20180225105205.xicklkl3n5azdw2j@node.shutemov.name> <20180226073552.xabt55ukp24inut5@gmail.com> <20180226080256.j7jzuxyokx42uytd@node.shutemov.name>
- User-agent: Mutt/1.9.2 (2017-12-15)
On Mon, Feb 26, 2018 at 11:02:56AM +0300, Kirill A. Shutemov wrote:
...
> > Also, could do a puts() hexdump of the affected memory area _before_ we overwrite
> > it? Is it empty? Could we add some debug warning that checks that it's all zeroes?
>
> The problem is that we don't really have a way get a message out of there.
>
> http://lkml.kernel.org/r/793b9c55-e85b-97b5-c857-dd8edcda4081@xxxxxxxxx
>
I'm sorry for stepping in (since I didn't follow the series in details)
but can't we use vga memory here and print this early data tere?
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