mem: Remove threadId from memory request class

In general, the ThreadID parameter is unnecessary in the memory system
as the ContextID is what is used for the purposes of locks/wakeups.
Since we allocate sequential ContextIDs for each thread on MT-enabled
CPUs, ThreadID is unnecessary as the CPUs can identify the requesting
thread through sideband info (SenderState / LSQ entries) or ContextID
offset from the base ContextID for a cpu.

This is a re-spin of 20264eb after the revert (bd1c6789) and includes
some fixes of that commit.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/cpu/o3/lsq.hh b/src/cpu/o3/lsq.hh
index dcd676221..6bc9b3d73 100644
--- a/src/cpu/o3/lsq.hh
+++ b/src/cpu/o3/lsq.hh
@@ -334,7 +334,7 @@ Fault
 LSQ<Impl>::read(RequestPtr req, RequestPtr sreqLow, RequestPtr sreqHigh,
                 int load_idx)
 {
-    ThreadID tid = req->threadId();
+    ThreadID tid = cpu->contextToThread(req->contextId());
 
     return thread[tid].read(req, sreqLow, sreqHigh, load_idx);
 }
@@ -344,7 +344,7 @@ Fault
 LSQ<Impl>::write(RequestPtr req, RequestPtr sreqLow, RequestPtr sreqHigh,
                  uint8_t *data, int store_idx)
 {
-    ThreadID tid = req->threadId();
+    ThreadID tid = cpu->contextToThread(req->contextId());
 
     return thread[tid].write(req, sreqLow, sreqHigh, data, store_idx);
 }