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Date: Sat, 26 May 2007 13:42:53 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Rusty Russell <rusty@...tcorp.com.au> CC: "Eric W. Biederman" <ebiederm@...ssion.com>, Jeremy Fitzhardinge <jeremy@...p.org>, Chris Wright <chrisw@...s-sol.org>, Virtualization Mailing List <virtualization@...ts.osdl.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Extending boot protocol & bzImage for paravirt_ops 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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