On Mon, Aug 08, 2005 at 09:47:54AM -0700, Tim Hockin wrote: > On Mon, Aug 08, 2005 at 02:01:25PM +0200, Andi Kleen wrote: > > > Some BIOSes do not lock SMM, and you *could* turn it off at the chipset > > > level. > > > > Doing so would be wasteful though. Both AMD and Intel CPUs need SMM code > > for the deeper C* sleep states. > > Really? I'm not too familiar with the deeper C states - what role does > SMM play?
It does all the hard work of powering down and up the CPU in C2 and C3. On AMD K8 even C1 (=HLT) executes SMM code depending on the BIOS setup. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
