On 13/10/2015 18:35, Brian J. Johnson wrote: > > Traditionally, SMI handling has been global. If the h/w didn't > broadcast the SMI to all CPUs, the SMI handler did so itself. The BSP > would wait for all APs to "check in" to SMM, then it would do whatever > work the SMI required, and signal the APs to resume. That ensured that > the OS wasn't active on the machine while the BSP was handling the SMI, > which was required for certain uses of SMI. > > However, this (obviously) doesn't scale well, so Intel has been moving > towards signaling SMI to only a single processor, and avoiding the > machine-wide rendezvous when it isn't necessary.
Yup, this is the RelaxedAp sync mode. We can (and should) adopt it later. Paolo _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
