From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Arvind Sankar <nivedita@alum.mit.edu>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Kees Cook <keescook@chromium.org>, Joerg Roedel <jroedel@suse.de>
Subject: Re: RFC x86/boot/64: BOOT_PGT_SIZE definition for compressed kernel
Date: Tue, 27 Oct 2020 17:31:02 +0300 [thread overview]
Message-ID: <20201027143102.ugco5dmixu66fjsc@box> (raw)
In-Reply-To: <20201027131617.GA1743199@rani.riverdale.lan>
On Tue, Oct 27, 2020 at 09:16:17AM -0400, Arvind Sankar wrote:
> The #PF handler is already there now with the SEV-ES series, but I agree
> it would still complicate things. It's simpler to just increase
> BOOT_PGT_SIZE and make it unconditional (i.e. bump it to say 32 or 64
> even if !KASLR). It's @nobits anyway so it would not increase the size
> of the bzImage, just require a slightly larger memory allocation by the
> bootloader.
I guess it's fine. But I'm worried we leave the picture in the same
fragile state. We still rely on the magic number.
--
Kirill A. Shutemov
next prev parent reply other threads:[~2020-10-27 17:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-25 0:41 Arvind Sankar
2020-10-25 2:20 ` Arvind Sankar
2020-10-27 12:40 ` Kirill A. Shutemov
2020-10-27 13:16 ` Arvind Sankar
2020-10-27 14:31 ` Kirill A. Shutemov [this message]
2020-10-27 15:46 ` Joerg Roedel
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