| From: |
| Jarkko Sakkinen <jarkko.sakkinen@intel.com> |
| To: |
| linux-kernel@vger.kernel.org |
| Subject: |
| [PATCH 00/23] x86, realmode: new infrastructure for realmode code |
| Date: |
| Tue, 8 May 2012 21:22:23 +0300 |
| Message-ID: |
| <1336501366-28617-1-git-send-email-jarkko.sakkinen@intel.com> |
| Cc: |
| linux-kbuild@vger.kernel.org, Michal Marek <mmarek@suse.cz>,
Sam Ravnborg <sam@ravnborg.org>,
Joseph Cihula <joseph.cihula@intel.com>,
Shane Wang <shane.wang@intel.com>, hpa@linux.intel.com,
Jarkko Sakkinen <jarkko.sakkinen@intel.com> |
| Archive‑link: | |
Article |
I've been working together with H. Peter Anvin in order
replace the ad-hoc real-mode code inside .x86_trampoline
section with an encapsulated binary that is fully relocatable
to any memory location under 1MB. Everything that is needs to
be relocated is relocated during initialization.
Benefits:
- Simplifies things. Real-mode code does not have to find its
own location any more. This makes maintaining and extending
this code much nicer experience.
- Cleans up code base a lot. Now real-mode code is encapsulated
from kernel both in source tree and in vmlinux.
- We can set proper permissions to pages of text, data/bss
and rodata. Before, .x86_trampoline had just rwx permissions.
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