From: Andreas Sandberg <andreas@sandberg.pp.se>
Date: Thu, 2 May 2013 10:01:50 +0000 (+0200)
Subject: kvm: Make MMIO requests uncacheable
X-Git-Tag: stable_2013_10_14~122
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=41156c8196589dfca96a7370a7719a6c5bc9982c;p=gem5.git

kvm: Make MMIO requests uncacheable

Device accesses are normally uncacheable. This change probably doesn't
make any difference since we normally disable caching when KVM is
active. However, there might be devices that check this, so we'd
better enable this flag to be safe.
---

diff --git a/src/cpu/kvm/base.cc b/src/cpu/kvm/base.cc
index 2d993cf35..59553b42c 100644
--- a/src/cpu/kvm/base.cc
+++ b/src/cpu/kvm/base.cc
@@ -772,9 +772,7 @@ BaseKvmCPU::handleKvmExitFailEntry()
 Tick
 BaseKvmCPU::doMMIOAccess(Addr paddr, void *data, int size, bool write)
 {
-    mmio_req.setPhys(paddr, size,
-                     0, /* flags */
-                     dataMasterId());
+    mmio_req.setPhys(paddr, size, Request::UNCACHEABLE, dataMasterId());
 
     const MemCmd cmd(write ? MemCmd::WriteReq : MemCmd::ReadReq);
     Packet pkt(&mmio_req, cmd);