From: Jack Steiner <steiner@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: [PATCH] - Save register stack contents on cpu start
Date: Thu, 31 Aug 2006 16:34:47 +0000 [thread overview]
Message-ID: <20060831163447.GA28508@sgi.com> (raw)
The SN PROM uses the register stack in the slave loop. The contents
must be preserved for the OS to return to the slave loop via offlining
a cpu or for kexec. A 'flushrs" is needed to force the stack to be written
to memory prior to changing bspstore.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Index: linux/arch/ia64/kernel/head.S
=================================--- linux.orig/arch/ia64/kernel/head.S 2006-08-31 11:14:49.000000000 -0500
+++ linux/arch/ia64/kernel/head.S 2006-08-31 11:20:37.405590270 -0500
@@ -197,6 +197,11 @@ start_ap:
;;
srlz.i
;;
+ {
+ flushrs // must be first insn in group
+ srlz.i
+ }
+ ;;
/*
* Save the region registers, predicate before they get clobbered
*/
reply other threads:[~2006-08-31 16:34 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060831163447.GA28508@sgi.com \
--to=steiner@sgi.com \
--cc=linux-ia64@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.