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mem: Hide WriteInvalidate requests from prefetchers

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Without this tweak, a prefetcher will happily prefetch data that will
promptly be invalidated and overwritten by a WriteInvalidate.
This commit is contained in:
Curtis Dunham 2014-12-23 09:31:19 -05:00
parent bd4f901c77
commit 516e6046ae
1 changed files with 3 additions and 1 deletions
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4
src/mem/cache/prefetch/base.cc vendored
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@ -83,7 +83,8 @@ BasePrefetcher::observeAccess(const PacketPtr &pkt) const
{
Addr addr = pkt->getAddr();
bool fetch = pkt->req->isInstFetch();
bool read= pkt->isRead();
bool read = pkt->isRead();
bool inv = pkt->isInvalidate();
bool is_secure = pkt->isSecure();
if (pkt->req->isUncacheable()) return false;
@ -91,6 +92,7 @@ BasePrefetcher::observeAccess(const PacketPtr &pkt) const
if (!fetch && !onData) return false;
if (!fetch && read && !onRead) return false;
if (!fetch && !read && !onWrite) return false;
if (!fetch && !read && inv) return false;
if (onMiss) {
return !inCache(addr, is_secure) &&