diff --git a/tests/Test_general_stencil.cc b/tests/Test_general_stencil.cc
index f03677d0..27d3f032 100644
--- a/tests/Test_general_stencil.cc
+++ b/tests/Test_general_stencil.cc
@@ -107,8 +107,8 @@ int main(int argc, char ** argv)
 	// Implement a stencil code that should agree with cshift!
 	for(int i=0;i<Check.Grid()->oSites();i++){
 	  auto SE = gStencil.GetEntry(0,i);
-	  auto check = Check.View();
-	  auto foo   = Foo.View();
+	  auto check = Check.View(CpuWrite);
+	  auto foo   = Foo.View(CpuRead);
 
 	  // Encapsulate in a general wrapper
 	  check[i] = foo[SE->_offset];                   auto tmp=check[i];
@@ -147,8 +147,8 @@ int main(int argc, char ** argv)
 	}}}}
 
 	if (nrm > 1.0e-4) {
-	  auto check = Check.View();
-	  auto bar   = Bar.View();
+	  auto check = Check.View(CpuRead);
+	  auto bar   = Bar.View(CpuRead);
 	  for(int i=0;i<check.size();i++){
 	    std::cout << i<<" Check "<<check[i]<< "\n"<<i<<" Bar "<<bar[i]<<std::endl;
 	  }
diff --git a/tests/Test_stencil.cc b/tests/Test_stencil.cc
index 0bd97fea..8e74e0d3 100644
--- a/tests/Test_stencil.cc
+++ b/tests/Test_stencil.cc
@@ -109,8 +109,8 @@ int main(int argc, char ** argv) {
 	  StencilEntry *SE;
 	  SE = myStencil.GetEntry(permute_type,0,i);
 	  
-	  auto check = Check.View();
-	  auto foo   = Foo.View();
+	  auto check = Check.View(CpuWrite);
+	  auto foo   = Foo.View(CpuRead);
 	  if ( SE->_is_local && SE->_permute )
 	    permute(check[i],foo[SE->_offset],permute_type);
 	  else if (SE->_is_local)
@@ -151,8 +151,8 @@ int main(int argc, char ** argv) {
 	}}}}
 
 	if (nrm > 1.0e-4) {
-	  auto check = Check.View();
-	  auto bar   = Bar.View();
+	  auto check = Check.View(CpuRead);
+	  auto bar   = Bar.View(CpuRead);
 	  for(int i=0;i<check.size();i++){
 	    std::cout << i<<" Check "<<check[i]<< "\n"<<i<<" Bar "<<bar[i]<<std::endl;
 	  }
@@ -210,8 +210,8 @@ int main(int argc, char ** argv) {
 	  SE = EStencil.GetEntry(permute_type,0,i);
 	  //	  std::cout << "Even source "<< i<<" -> " <<SE->_offset << " "<< SE->_is_local<<std::endl;
 
-	  auto ocheck = OCheck.View();
-	  auto efoo   = EFoo.View();
+	  auto ocheck = OCheck.View(CpuWrite);
+	  auto efoo   = EFoo.View(CpuRead);
 	  if ( SE->_is_local && SE->_permute )
 	    permute(ocheck[i],efoo[SE->_offset],permute_type);
 	  else if (SE->_is_local)
@@ -226,8 +226,8 @@ int main(int argc, char ** argv) {
 	  SE = OStencil.GetEntry(permute_type,0,i);
 	  //	  std::cout << "ODD source "<< i<<" -> " <<SE->_offset << " "<< SE->_is_local<<std::endl;
 
-	  auto echeck = ECheck.View();
-	  auto ofoo   = OFoo.View();
+	  auto echeck = ECheck.View(CpuWrite);
+	  auto ofoo   = OFoo.View(CpuRead);
 	  if ( SE->_is_local && SE->_permute )
 	    permute(echeck[i],ofoo[SE->_offset],permute_type);
 	  else if (SE->_is_local)
diff --git a/tests/core/Test_staggered5D.cc b/tests/core/Test_staggered5D.cc
index 7055d183..402e69d5 100644
--- a/tests/core/Test_staggered5D.cc
+++ b/tests/core/Test_staggered5D.cc
@@ -88,14 +88,15 @@ int main (int argc, char ** argv)
   // replicate across fifth dimension
   ////////////////////////////////////
   LatticeGaugeField Umu5d(FGrid); 
-  auto umu5d = Umu5d.View();
-  auto umu   = Umu.View();
-  for(int ss=0;ss<Umu.Grid()->oSites();ss++){
-    for(int s=0;s<Ls;s++){
-      umu5d[Ls*ss+s] = umu[ss];
+  {
+    auto umu5d = Umu5d.View(CpuWrite);
+    auto umu   = Umu.View(CpuRead);
+    for(int ss=0;ss<Umu.Grid()->oSites();ss++){
+      for(int s=0;s<Ls;s++){
+	umu5d[Ls*ss+s] = umu[ss];
+      }
     }
   }
-
   std::vector<LatticeColourMatrix> U(4,FGrid);
 
   for(int mu=0;mu<Nd;mu++){
diff --git a/tests/debug/Test_cayley_mres.cc b/tests/debug/Test_cayley_mres.cc
index 1bf6f2dc..f2513c7e 100644
--- a/tests/debug/Test_cayley_mres.cc
+++ b/tests/debug/Test_cayley_mres.cc
@@ -570,8 +570,8 @@ void  TestConserved1(Action & Ddwf, Action & Ddwfrev,
       LatticeGaugeField Umu5d(FGrid); 
       std::vector<LatticeColourMatrix> U(4,FGrid);
       {
-	auto Umu5d_v = Umu5d.View();
-	auto Umu_v = Umu.View();
+	auto Umu5d_v = Umu5d.View(CpuWrite);
+	auto Umu_v = Umu.View(CpuRead);
 	for(int ss=0;ss<Umu.Grid()->oSites();ss++){
 	  for(int s=0;s<Ls;s++){
 	    Umu5d_v[Ls*ss+s] = Umu_v[ss];
@@ -597,8 +597,8 @@ void  TestConserved1(Action & Ddwf, Action & Ddwfrev,
       {
 	RealD diag = 5.0 - Ddwf.M5;
 	mass = Ddwf.mass;
-	auto psi=result5.View();
-	auto chi=tmp.View();
+	auto psi=result5.View(CpuRead);
+	auto chi=tmp.View(CpuWrite);
 	thread_for(sss,UGrid->oSites(),{
 	  uint64_t ss= sss*Ls;
 	  typedef vSpinColourVector spinor;
diff --git a/tests/forces/Test_contfrac_force.cc b/tests/forces/Test_contfrac_force.cc
index 4eeb8c27..4c3a3f53 100644
--- a/tests/forces/Test_contfrac_force.cc
+++ b/tests/forces/Test_contfrac_force.cc
@@ -98,9 +98,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto mom_v = mom.View();
-    auto Uprime_v = Uprime.View();
-    auto U_v = U.View();
+    auto mom_v = mom.View(CpuRead);
+    auto U_v   = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     thread_foreach( i,mom_v,{
       Uprime_v[i](mu) =
 	  U_v[i](mu)
diff --git a/tests/forces/Test_dwf_force.cc b/tests/forces/Test_dwf_force.cc
index 009f50b3..fea867e6 100644
--- a/tests/forces/Test_dwf_force.cc
+++ b/tests/forces/Test_dwf_force.cc
@@ -100,9 +100,9 @@ int main (int argc, char ** argv)
 
     // fourth order exponential approx
 
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach( i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_dwf_force_eofa.cc b/tests/forces/Test_dwf_force_eofa.cc
index 670e7589..5b864279 100644
--- a/tests/forces/Test_dwf_force_eofa.cc
+++ b/tests/forces/Test_dwf_force_eofa.cc
@@ -110,9 +110,9 @@ int main (int argc, char** argv)
     PokeIndex<LorentzIndex>(mom, mommu, mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_dwf_gpforce.cc b/tests/forces/Test_dwf_gpforce.cc
index d762e22a..a0743edc 100644
--- a/tests/forces/Test_dwf_gpforce.cc
+++ b/tests/forces/Test_dwf_gpforce.cc
@@ -119,9 +119,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_dwf_gpforce_eofa.cc b/tests/forces/Test_dwf_gpforce_eofa.cc
index 66ae9dcf..69b9adec 100644
--- a/tests/forces/Test_dwf_gpforce_eofa.cc
+++ b/tests/forces/Test_dwf_gpforce_eofa.cc
@@ -114,9 +114,9 @@ int main (int argc, char** argv)
     PokeIndex<LorentzIndex>(mom, mommu, mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_gp_plaq_force.cc b/tests/forces/Test_gp_plaq_force.cc
index c4e214bb..5de7ddb7 100644
--- a/tests/forces/Test_gp_plaq_force.cc
+++ b/tests/forces/Test_gp_plaq_force.cc
@@ -85,9 +85,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto Uprime_v = Uprime.View();
-    auto U_v = U.View();
-    auto mom_v = mom.View();
+    auto Uprime_v = Uprime.View(CpuWrite);
+    auto U_v = U.View(CpuRead);
+    auto mom_v = mom.View(CpuRead);
     thread_foreach(i,mom_v,{ // exp(pmu dt) * Umu
       Uprime_v[i](mu) = U_v[i](mu) + mom_v[i](mu)*U_v[i](mu)*dt ;
     });
diff --git a/tests/forces/Test_gp_rect_force.cc b/tests/forces/Test_gp_rect_force.cc
index 2573af6a..026ce60f 100644
--- a/tests/forces/Test_gp_rect_force.cc
+++ b/tests/forces/Test_gp_rect_force.cc
@@ -87,9 +87,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto mom_v   = mom.View();
-    auto Uprime_v= Uprime.View();
-    auto U_v     = U.View();
+    auto mom_v   = mom.View(CpuRead);
+    auto Uprime_v= Uprime.View(CpuWrite);
+    auto U_v     = U.View(CpuRead);
     thread_foreach(i,mom_v,{ // exp(pmu dt) * Umu
       Uprime_v[i](mu) = U_v[i](mu) + mom_v[i](mu)*U_v[i](mu)*dt ;
     });
diff --git a/tests/forces/Test_gpdwf_force.cc b/tests/forces/Test_gpdwf_force.cc
index 09a1dc4b..22927d01 100644
--- a/tests/forces/Test_gpdwf_force.cc
+++ b/tests/forces/Test_gpdwf_force.cc
@@ -105,9 +105,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto U_v = U.View();
-    auto mom_v = mom.View();
-    auto Uprime_v = Uprime.View();
+    auto U_v = U.View(CpuRead);
+    auto mom_v = mom.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) = U_v[i](mu)
 	+ mom_v[i](mu)*U_v[i](mu)*dt 
diff --git a/tests/forces/Test_gpwilson_force.cc b/tests/forces/Test_gpwilson_force.cc
index cd30d898..41c4641d 100644
--- a/tests/forces/Test_gpwilson_force.cc
+++ b/tests/forces/Test_gpwilson_force.cc
@@ -99,9 +99,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_mobius_force.cc b/tests/forces/Test_mobius_force.cc
index a1c4e930..daab4149 100644
--- a/tests/forces/Test_mobius_force.cc
+++ b/tests/forces/Test_mobius_force.cc
@@ -101,9 +101,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto U_v      = U.View();
-    auto mom_v    = mom.View();
-    auto Uprime_v = Uprime.View();
+    auto U_v      = U.View(CpuRead);
+    auto mom_v    = mom.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =  U_v[i](mu)
 	+ mom_v[i](mu)*U_v[i](mu)*dt 
diff --git a/tests/forces/Test_mobius_force_eofa.cc b/tests/forces/Test_mobius_force_eofa.cc
index f71e2d41..7a8d4cf8 100644
--- a/tests/forces/Test_mobius_force_eofa.cc
+++ b/tests/forces/Test_mobius_force_eofa.cc
@@ -112,9 +112,9 @@ int main (int argc, char** argv)
     PokeIndex<LorentzIndex>(mom, mommu, mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/forces/Test_mobius_gpforce_eofa.cc b/tests/forces/Test_mobius_gpforce_eofa.cc
index 4975f36d..13de233b 100644
--- a/tests/forces/Test_mobius_gpforce_eofa.cc
+++ b/tests/forces/Test_mobius_gpforce_eofa.cc
@@ -115,9 +115,9 @@ int main (int argc, char** argv)
     SU3::GaussianFundamentalLieAlgebraMatrix(RNG4, mommu); // Traceless antihermitian momentum; gaussian in lie alg
 
     PokeIndex<LorentzIndex>(mom, mommu, mu);
-    auto U_v      = U.View();
-    auto mom_v    = mom.View();
-    auto Uprime_v = Uprime.View();
+    auto U_v      = U.View(CpuRead);
+    auto mom_v    = mom.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     // fourth order exponential approx
     thread_foreach( i, mom_v,{
       Uprime_v[i](mu) = U_v[i](mu) + mom_v[i](mu)*U_v[i](mu)*dt + mom_v[i](mu) *mom_v[i](mu) *U_v[i](mu)*(dt*dt/2.0)
diff --git a/tests/forces/Test_partfrac_force.cc b/tests/forces/Test_partfrac_force.cc
index 3ea2c6aa..9292274e 100644
--- a/tests/forces/Test_partfrac_force.cc
+++ b/tests/forces/Test_partfrac_force.cc
@@ -101,9 +101,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto U_v = U.View();
-    auto mom_v = mom.View();
-    auto Uprime_v = Uprime.View();
+    auto U_v = U.View(CpuRead);
+    auto mom_v = mom.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =  U_v[i](mu)
 	+ mom_v[i](mu)*U_v[i](mu)*dt 
diff --git a/tests/forces/Test_rect_force.cc b/tests/forces/Test_rect_force.cc
index 9a78de24..909068c2 100644
--- a/tests/forces/Test_rect_force.cc
+++ b/tests/forces/Test_rect_force.cc
@@ -87,9 +87,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto Uprime_v = Uprime.View();
-    auto U_v      = U.View();
-    auto mom_v    = mom.View();
+    auto Uprime_v = Uprime.View(CpuWrite);
+    auto U_v      = U.View(CpuRead);
+    auto mom_v    = mom.View(CpuRead);
     thread_foreach(i,mom_v,{ // exp(pmu dt) * Umu
       Uprime_v[i](mu) = U_v[i](mu) + mom_v[i](mu)*U_v[i](mu)*dt ;
     });
diff --git a/tests/forces/Test_wilson_force.cc b/tests/forces/Test_wilson_force.cc
index 47f1516a..397dc40c 100644
--- a/tests/forces/Test_wilson_force.cc
+++ b/tests/forces/Test_wilson_force.cc
@@ -105,9 +105,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto U_v = U.View();
-    auto mom_v = mom.View();
-    auto Uprime_v = Uprime.View();
+    auto U_v = U.View(CpuRead);
+    auto mom_v = mom.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
     thread_foreach( i,mom_v,{
       Uprime_v[i](mu)  =	  U_v[i](mu);
       Uprime_v[i](mu) += mom_v[i](mu)*U_v[i](mu)*dt ;
diff --git a/tests/forces/Test_wilsonclover_force.cc b/tests/forces/Test_wilsonclover_force.cc
index d9ace23c..ff664e19 100644
--- a/tests/forces/Test_wilsonclover_force.cc
+++ b/tests/forces/Test_wilsonclover_force.cc
@@ -105,9 +105,9 @@ int main(int argc, char **argv)
     Hmom -= real(sum(trace(mommu * mommu)));
     PokeIndex<LorentzIndex>(mom, mommu, mu);
 
-    auto Uprime_v = Uprime.View();
-    auto U_v      = U.View();
-    auto mom_v    = mom.View();
+    auto Uprime_v = Uprime.View(CpuWrite);
+    auto U_v      = U.View(CpuRead);
+    auto mom_v    = mom.View(CpuRead);
     thread_foreach(ss,mom_v,
     {
       Uprime_v[ss]._internal[mu] = ProjectOnGroup(Exponentiate(mom_v[ss]._internal[mu], dt, 12) * U_v[ss]._internal[mu]);
diff --git a/tests/forces/Test_zmobius_force.cc b/tests/forces/Test_zmobius_force.cc
index 2730885f..2ed12acd 100644
--- a/tests/forces/Test_zmobius_force.cc
+++ b/tests/forces/Test_zmobius_force.cc
@@ -114,9 +114,9 @@ int main (int argc, char ** argv)
     PokeIndex<LorentzIndex>(mom,mommu,mu);
 
     // fourth order exponential approx
-    auto mom_v    = mom.View();
-    auto U_v      = U.View();
-    auto Uprime_v = Uprime.View();
+    auto mom_v    = mom.View(CpuRead);
+    auto U_v      = U.View(CpuRead);
+    auto Uprime_v = Uprime.View(CpuWrite);
 
     thread_foreach(i,mom_v,{
       Uprime_v[i](mu) =	  U_v[i](mu)
diff --git a/tests/solver/Test_dwf_hdcr.cc b/tests/solver/Test_dwf_hdcr.cc
index 873530ff..f93af852 100644
--- a/tests/solver/Test_dwf_hdcr.cc
+++ b/tests/solver/Test_dwf_hdcr.cc
@@ -1,5 +1,3 @@
-
-
 /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
@@ -302,8 +300,8 @@ int main (int argc, char ** argv)
     int nb=nbasisc/2;
     CoarseAggregates.CreateSubspaceChebyshev(CRNG,PosdefLdop,nb,12.0,0.02,500,100,100,0.0);
     for(int n=0;n<nb;n++){
-      auto subspace    = CoarseAggregates.subspace[n].View();
-      auto subspace_g5 = CoarseAggregates.subspace[n+nb].View();
+      auto subspace    = CoarseAggregates.subspace[n].View(CpuRead);
+      auto subspace_g5 = CoarseAggregates.subspace[n+nb].View(CpuWrite);
       for(int nn=0;nn<nb;nn++){
 	for(int site=0;site<Coarse5d->oSites();site++){
 	  subspace_g5[site](nn)   = subspace[site](nn);