On 09/27/2011 10:17 AM, Blue Swirl wrote: > On Tue, Sep 27, 2011 at 5:01 PM, Richard Henderson <r...@twiddle.net> wrote: >> On 09/27/2011 09:53 AM, Blue Swirl wrote: >>>>> So how would you emulate cache lines with line locking on KVM? >>> The cache would be a MMIO device which registers to handle all memory >>> space. Configuring the cache controller changes how the device >>> operates. Put this device between CPU and memory and other devices. >>> Performance would probably be horrible, so CPU should disable the >>> device automatically after some time. >>> >> >> Seems like a better alternative would be to add an mmio device when >> a line is actually locked. And the device would cover *only* the >> locked line. I assume that following the boot process these lines >> are unlocked, and the normal running state of the system would have >> none of these mmio devices active. > > The BIOS may also attempt to perform tests with the cache device, > probe for cache sizes or read back I/D TLB lines via diagnostic modes. > That wouldn't work in your approach.
Err... why not? r~
