mem-cache: enhance address handle and refect composite prefetcher

[zephyrols]

• Add isCompositePrefetcher flag to prefetch::Base to indicate whether the prefetcher is a composite one containing sub-prefetchers.

  • When set to true, both virtual and physical addresses are passed to sub-prefetchers.
  • Sub-prefetchers are responsible for deciding which address to use in calculatePrefetch.

• Refactor PrefetchInfo and PrefetchCmd:

  • PrefetchInfo now supports carrying both virtual and physical addresses.
  • PrefetchCmd can now issue prefetches based on physical addresses.
  • Renamed several members to improve clarity and reflect their semantics more accurately (e.g., distinguishing between virtual and physical addresses, target level, etc.).

• Refactor prefetch::Queue:

  • Supports address duplication checks using both virtual and physical addresses for squash handling.
  • Decouples address translation decision-making from the prefetcher’s use_virtual_address flag; decisions now depend on the address properties of each PrefetchCmd.
  • Extracts logic for dropping prefetches into a dedicated shouldDropPrefetch function.
  • Fixes a bug in alreadyInQueue where an incorrect loop break condition could cause priority updates to target the wrong entry.

• Introduce PrefetchFilter class:

  • A new modular filter component intended to eventually replace the legacy pfLRUFilter (lru_cache<Addr, Addr>).
  • Provides a unified interface to filter both virtual and physical address prefetches.
  • Only declared and partially implemented in this commit; integration and replacement to follow in later commits.
  • Designed for improved flexibility and extensibility in prefetch filtering logic.

• Refactor WorkerPrefetcher:

  • Removes redundant logic.
  • Cross-level prefetches to upper-level prefetchers are scheduled only when the local buffer is not empty.

• Refactor CompositeWithWorkerPrefetcher:

  • Removes redundant logic.

Change-Id: Ib12a66c35f313d795d3b28fdf7507ee7fb9b808e

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 76ce65496dbbf608e1be7ebb6e6943fa7abc592d workflow: gem5 Performance Test

Standard Performance

Overall Score

	PR	Master	Diff(%)
Score	16.21	16.22	-0.01 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 76ce65496dbbf608e1be7ebb6e6943fa7abc592d workflow: gem5 Ideal BTB Performance Test

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	20.63	20.61	+0.09 🟢

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Performance Test

Standard Performance

Overall Score

	PR	Master	Diff(%)
Score	16.15	16.17	-0.13 🔴

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Performance Test

Standard Performance

Overall Score

	PR	Previous Commit	Diff(%)
Score	16.15	16.15	0.00

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Ideal BTB Performance Test

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.49	19.50	-0.04 🔴

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Ideal BTB Performance Test

Ideal BTB Performance

Overall Score

	PR	Previous Commit	Diff(%)
Score	19.49	19.77	-1.43 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Simple RVV Performance Test (Ideal BTB)

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.18	19.16	+0.13 🟢

[Generated by GEM5 Performance Robot] commit: 767f14c6fcf2719526625e1e3de4f7ebbcef1870 workflow: gem5 Simple RVV Performance Test (Ideal BTB)

Ideal BTB Performance

Overall Score

	PR	Previous Commit	Diff(%)
Score	19.18	19.41	-1.20 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: b1ac8827e5b51d0d3d8a3327592087a06d86c825 workflow: gem5 Ideal BTB Performance Test

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.77	19.50	+1.41 🟢

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: b1ac8827e5b51d0d3d8a3327592087a06d86c825 workflow: gem5 Simple RVV Performance Test (Ideal BTB)

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.41	19.16	+1.35 🟢

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: b1ac8827e5b51d0d3d8a3327592087a06d86c825 workflow: gem5 Performance Test

Standard Performance

Overall Score

	PR	Master	Diff(%)
Score	16.15	16.17	-0.13 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 186edd1b87a7f66d326c8e687e71791353159711 workflow: gem5 Performance Test

Standard Performance

Overall Score

	PR	Master	Diff(%)
Score	16.15	16.17	-0.10 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 186edd1b87a7f66d326c8e687e71791353159711 workflow: gem5 Ideal BTB Performance Test

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.76	19.77	-0.02 🔴

[XiangShanRobot]

[Generated by GEM5 Performance Robot] commit: 186edd1b87a7f66d326c8e687e71791353159711 workflow: gem5 Simple RVV Performance Test (Ideal BTB)

Ideal BTB Performance

Overall Score

	PR	Master	Diff(%)
Score	19.46	19.47	-0.08 🔴