From: "H. Peter Anvin" <hpa@zytor.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Jeremy Fitzhardinge <jeremy@goop.org>,
Chris Wright <chrisw@sous-sol.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Extending boot protocol & bzImage for paravirt_ops
Date: Sat, 26 May 2007 13:42:53 -0700 [thread overview]
Message-ID: <46589BCD.4040807@zytor.com> (raw)
In-Reply-To: <1180174691.650.8.camel@localhost.localdomain>
Rusty Russell wrote:
>>
>> + Bit 6 (write): KEEP_SEGMENTS
>> + Protocol: 2.07+
>> + - if 0, reload the segment registers in the 32bit entry point.
>> + - if 1, do not reload the segment registers in the 32bit entry point.
>> + Assume that %cs %ds %ss %es are all set to flat segments with
>> + a base of 0 (or the equivalent for their environment).
>
> You also want to skip the cli: perhaps a separate flag for this is
> appropriate though.
>
Do we have *any* environment that enters the 32-bit code with interrupts
enabled? I would think that is unsafe no matter how you do it.
-hpa
next prev parent reply other threads:[~2007-05-26 20:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-25 15:06 Extending boot protocol & bzImage for paravirt_ops Jeremy Fitzhardinge
2007-05-25 16:46 ` Eric W. Biederman
2007-05-26 10:18 ` Rusty Russell
2007-05-26 20:42 ` H. Peter Anvin [this message]
2007-05-26 23:47 ` Jeremy Fitzhardinge
2007-05-27 0:10 ` Rusty Russell
2007-05-27 0:15 ` H. Peter Anvin
2007-05-26 23:47 ` Jeremy Fitzhardinge
2007-05-27 0:14 ` H. Peter Anvin
2007-05-27 0:19 ` Jeremy Fitzhardinge
2007-05-30 23:16 ` Jeremy Fitzhardinge
2007-05-31 8:08 ` Vivek Goyal
2007-06-01 20:55 ` Jeremy Fitzhardinge
2007-06-01 21:40 ` H. Peter Anvin
2007-06-01 21:47 ` Jeremy Fitzhardinge
2007-06-01 21:57 ` H. Peter Anvin
2007-06-02 0:37 ` Jeremy Fitzhardinge
2007-06-02 0:42 ` H. Peter Anvin
2007-06-02 0:58 ` Jeremy Fitzhardinge
2007-06-02 1:02 ` H. Peter Anvin
2007-06-02 1:08 ` Jeremy Fitzhardinge
2007-06-02 1:17 ` Eric W. Biederman
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