From: Daniel R. Carvalho <odanrc@yahoo.com.br>
Date: Sat, 2 Jun 2018 13:04:49 +0000 (+0200)
Subject: mem-cache: Use secure bit in findVictim
X-Git-Tag: v19.0.0.0~2073
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fa44e21f2eb0ea1be035b2a14bd6ad6ada14375b;p=gem5.git

mem-cache: Use secure bit in findVictim

Sector caches must know if there was a sector hit in order
to decide whether a victim's sector must be fully evicted
to give place to a new sector or not.

In order to do so it needs the tag and secure information.

Change-Id: Ib554169e25fa131d6bf986561f7970b787c56874
Reviewed-on: https://gem5-review.googlesource.com/10722
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
---

diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc
index 75b17699a..fdfe37ef4 100644
--- a/src/mem/cache/base.cc
+++ b/src/mem/cache/base.cc
@@ -1210,7 +1210,7 @@ BaseCache::allocateBlock(Addr addr, bool is_secure, PacketList &writebacks)
 {
     // Find replacement victim
     std::vector<CacheBlk*> evict_blks;
-    CacheBlk *victim = tags->findVictim(addr, evict_blks);
+    CacheBlk *victim = tags->findVictim(addr, is_secure, evict_blks);
 
     // It is valid to return nullptr if there is no victim
     if (!victim)
diff --git a/src/mem/cache/tags/base.hh b/src/mem/cache/tags/base.hh
index 0cc79020d..7ed90fbd9 100644
--- a/src/mem/cache/tags/base.hh
+++ b/src/mem/cache/tags/base.hh
@@ -270,11 +270,12 @@ class BaseTags : public ClockedObject
      * @sa insertBlock
      *
      * @param addr Address to find a victim for.
+     * @param is_secure True if the target memory space is secure.
      * @param evict_blks Cache blocks to be evicted.
      * @return Cache block to be replaced.
      */
-    virtual CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks)
-                                                                     const = 0;
+    virtual CacheBlk* findVictim(Addr addr, const bool is_secure,
+                                 std::vector<CacheBlk*>& evict_blks) const = 0;
 
     virtual CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat) = 0;
 
diff --git a/src/mem/cache/tags/base_set_assoc.hh b/src/mem/cache/tags/base_set_assoc.hh
index b41c3096c..12b2efb2f 100644
--- a/src/mem/cache/tags/base_set_assoc.hh
+++ b/src/mem/cache/tags/base_set_assoc.hh
@@ -204,11 +204,12 @@ class BaseSetAssoc : public BaseTags
      * only contains the victim.
      *
      * @param addr Address to find a victim for.
+     * @param is_secure True if the target memory space is secure.
      * @param evict_blks Cache blocks to be evicted.
      * @return Cache block to be replaced.
      */
-    CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const
-                                                                     override
+    CacheBlk* findVictim(Addr addr, const bool is_secure,
+                         std::vector<CacheBlk*>& evict_blks) const override
     {
         // Get possible locations for the victim block
         std::vector<CacheBlk*> locations = getPossibleLocations(addr);
diff --git a/src/mem/cache/tags/fa_lru.cc b/src/mem/cache/tags/fa_lru.cc
index b5950f6cf..3a60e99f9 100644
--- a/src/mem/cache/tags/fa_lru.cc
+++ b/src/mem/cache/tags/fa_lru.cc
@@ -195,7 +195,8 @@ FALRU::findBlockBySetAndWay(int set, int way) const
 }
 
 CacheBlk*
-FALRU::findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const
+FALRU::findVictim(Addr addr, const bool is_secure,
+                  std::vector<CacheBlk*>& evict_blks) const
 {
     // The victim is always stored on the tail for the FALRU
     FALRUBlk* victim = tail;
diff --git a/src/mem/cache/tags/fa_lru.hh b/src/mem/cache/tags/fa_lru.hh
index b134417b5..7aec36a61 100644
--- a/src/mem/cache/tags/fa_lru.hh
+++ b/src/mem/cache/tags/fa_lru.hh
@@ -199,11 +199,12 @@ class FALRU : public BaseTags
      * only contains the victim.
      *
      * @param addr Address to find a victim for.
+     * @param is_secure True if the target memory space is secure.
      * @param evict_blks Cache blocks to be evicted.
      * @return Cache block to be replaced.
      */
-    CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const
-                                                                    override;
+    CacheBlk* findVictim(Addr addr, const bool is_secure,
+                         std::vector<CacheBlk*>& evict_blks) const override;
 
     /**
      * Insert the new block into the cache and update replacement data.