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Message-ID: <alpine.LRH.2.00.0906242045290.18503@tundra.namei.org> Date: Wed, 24 Jun 2009 20:46:50 +1000 (EST) From: James Morris <jmorris@...ei.org> To: Joseph Cihula <joseph.cihula@...el.com> cc: linux-kernel@...r.kernel.org, mingo@...e.hu, arjan@...ux.intel.com, hpa@...or.com, andi@...stfloor.org, chrisw@...s-sol.org, jbeulich@...ell.com, peterm@...hat.com, gang.wei@...el.com, shane.wang@...el.com Subject: Re: [RFC v5][PATCH 2/4] intel_txt: Intel(R) TXT reboot/halt shutdown support On Mon, 22 Jun 2009, Joseph Cihula wrote: > Support for graceful handling of kernel reboots after an Intel(R) TXT launch. > > Without this patch, attempting to reboot or halt the system will cause the > TXT hardware to lock memory upon system restart because the secrets-in-memory > flag that was set on launch was never cleared. This will in turn cause BIOS > to execute a TXT Authenticated Code Module (ACM) that will scrub all of memory > and then unlock it. Depending on the amount of memory in the system and its type, > this may take some time. > Does this mean that after a power failure, the system will perform this memory scrub on the next boot? How long does it take per MB on a typical system? -- James Morris <jmorris@...ei.org> -- 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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