Methods and apparatus for cache intervention

An apparatus comprising:

• a first caching agent;
• a cache interconnect coupled to the first caching agent;
• and
• a second caching agent coupled to the cache interconnect, the second caching agent to monitor the cache interconnect to detect a memory read request from the first caching agent, the memory read request being associated with a memory block, the second caching agent to assert a signal line indicative of a cache hit if the memory block is in the second caching agent in an unmodified state, the second caching agent to assert the signal line indicative of the cache hit if the memory block is in the second caching agent in a modified state.

An apparatus comprising:

• a cache;
• and
• a processor coupled to the cache, the processor including address lines, the processor to:
• snoop the address lines to detect a memory read request associated with a memory block stored in the cache;
• assert a signal line indicative of a cache hit in response to snooping the address lines if the memory block is stored in the cache in an unmodified state;
• and
• assert the signal line indicative of the cache hit in response to snooping the address lines if the memory block is stored in the cache in a modified state.