diff --git a/repos/dde_linux/run/usb_hid.run b/repos/dde_linux/run/usb_hid.run
index 6b936783ba..714d55d747 100644
--- a/repos/dde_linux/run/usb_hid.run
+++ b/repos/dde_linux/run/usb_hid.run
@@ -57,7 +57,7 @@ append_if [have_spec gpio] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -71,7 +71,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/dde_linux/run/usb_net.run b/repos/dde_linux/run/usb_net.run
index 1534743fe9..c30777b4b3 100644
--- a/repos/dde_linux/run/usb_net.run
+++ b/repos/dde_linux/run/usb_net.run
@@ -72,7 +72,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="10M"/>
+		<resource name="RAM" quantum="10M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -99,7 +99,7 @@ append_if [have_spec gpio] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/dde_linux/run/usb_storage.run b/repos/dde_linux/run/usb_storage.run
index 41a3454443..6a9e1298b6 100644
--- a/repos/dde_linux/run/usb_storage.run
+++ b/repos/dde_linux/run/usb_storage.run
@@ -50,7 +50,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -64,7 +64,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/dde_linux/run/wifi.run b/repos/dde_linux/run/wifi.run
index d1220be190..acc2c47d63 100644
--- a/repos/dde_linux/run/wifi.run
+++ b/repos/dde_linux/run/wifi.run
@@ -88,7 +88,7 @@ network={
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="16M"/>
+		<resource name="RAM" quantum="16M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -115,7 +115,7 @@ append_if [have_spec gpio] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/dde_oss/run/oss.run b/repos/dde_oss/run/oss.run
index b7ca014c92..2d2ed64d26 100644
--- a/repos/dde_oss/run/oss.run
+++ b/repos/dde_oss/run/oss.run
@@ -46,7 +46,7 @@ append config {
 		<any-service> <parent/> <any-child/> </any-service>
 	</default-route>
 	<start name="acpi">
-		<resource name="RAM" quantum="4M"/>
+		<resource name="RAM" quantum="4M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
diff --git a/repos/gems/run/http_blk.run b/repos/gems/run/http_blk.run
index ac1c75fda2..74cab207d4 100644
--- a/repos/gems/run/http_blk.run
+++ b/repos/gems/run/http_blk.run
@@ -92,7 +92,7 @@ append_if $use_nic_driver config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -106,7 +106,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>}
 
diff --git a/repos/gems/run/tcp_terminal.run b/repos/gems/run/tcp_terminal.run
index 6dc2e618fa..63bc43bd01 100644
--- a/repos/gems/run/tcp_terminal.run
+++ b/repos/gems/run/tcp_terminal.run
@@ -76,7 +76,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -91,7 +91,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/libports/run/avplay.run b/repos/libports/run/avplay.run
index cf34acecd4..d71b23a04a 100644
--- a/repos/libports/run/avplay.run
+++ b/repos/libports/run/avplay.run
@@ -57,7 +57,7 @@ append_if [have_spec sdl] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -71,7 +71,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr [have_spec pci] && ![have_spec acpi]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides>
 			<service name="PCI"/>
 		</provides>
diff --git a/repos/libports/run/http_srv_tracing.run b/repos/libports/run/http_srv_tracing.run
index bd456a1713..5588d9bbb3 100644
--- a/repos/libports/run/http_srv_tracing.run
+++ b/repos/libports/run/http_srv_tracing.run
@@ -77,7 +77,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -91,7 +91,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>}
 
diff --git a/repos/libports/run/libc_block.run b/repos/libports/run/libc_block.run
index 3fad4fd390..b6d22ee0ca 100644
--- a/repos/libports/run/libc_block.run
+++ b/repos/libports/run/libc_block.run
@@ -90,7 +90,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -104,7 +104,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/libports/run/libc_ffat_fs.run b/repos/libports/run/libc_ffat_fs.run
index d4b26fcd74..ef5cea7e5b 100644
--- a/repos/libports/run/libc_ffat_fs.run
+++ b/repos/libports/run/libc_ffat_fs.run
@@ -78,7 +78,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -92,7 +92,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/libports/run/libc_filesystem_test.inc b/repos/libports/run/libc_filesystem_test.inc
index 71996ea56f..9e26026ea7 100644
--- a/repos/libports/run/libc_filesystem_test.inc
+++ b/repos/libports/run/libc_filesystem_test.inc
@@ -119,7 +119,7 @@ append config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -133,7 +133,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/libports/run/lwip.run b/repos/libports/run/lwip.run
index 25d3134404..103a991f51 100644
--- a/repos/libports/run/lwip.run
+++ b/repos/libports/run/lwip.run
@@ -122,7 +122,7 @@ append_if $use_nic_driver config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -136,7 +136,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>}
 
diff --git a/repos/libports/run/network_test.inc b/repos/libports/run/network_test.inc
index ca4eef25a0..568d15b907 100644
--- a/repos/libports/run/network_test.inc
+++ b/repos/libports/run/network_test.inc
@@ -119,7 +119,7 @@ append_if [expr ![have_spec omap4] && ![have_spec exynos5]] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -133,7 +133,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/libports/run/qt5_drivers.inc b/repos/libports/run/qt5_drivers.inc
index ed157698c3..6acce9033e 100644
--- a/repos/libports/run/qt5_drivers.inc
+++ b/repos/libports/run/qt5_drivers.inc
@@ -123,7 +123,7 @@ proc drivers_start_nodes { feature_arg } {
 
 	append_if [use_acpi_drv feature] start_nodes {
 		<start name="acpi">
-			<resource name="RAM" quantum="10M"/>
+			<resource name="RAM" quantum="10M" constrain_phys="yes"/>
 			<binary name="acpi_drv"/>
 			<provides>
 				<service name="PCI"/>
@@ -177,7 +177,7 @@ proc drivers_start_nodes { feature_arg } {
 
 	append_if [expr [use_pci_drv feature] && ![use_acpi_drv feature]] start_nodes {
 		<start name="pci_drv">
-			<resource name="RAM" quantum="2M"/>
+			<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 			<provides><service name="PCI"/></provides>
 		</start>
 	}
diff --git a/repos/os/run/ahci.run b/repos/os/run/ahci.run
index bb69546f12..97caf28299 100644
--- a/repos/os/run/ahci.run
+++ b/repos/os/run/ahci.run
@@ -49,7 +49,7 @@ append_if [have_spec exynos5] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -63,7 +63,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/os/run/ahci_bench.run b/repos/os/run/ahci_bench.run
index 0de83623aa..378809db61 100644
--- a/repos/os/run/ahci_bench.run
+++ b/repos/os/run/ahci_bench.run
@@ -71,7 +71,7 @@ append_if [expr ![have_spec acpi] && ![have_spec pci]] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="16M"/>
+		<resource name="RAM" quantum="16M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -85,7 +85,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/os/run/framebuffer.run b/repos/os/run/framebuffer.run
index a1547ea49d..87f874ee63 100644
--- a/repos/os/run/framebuffer.run
+++ b/repos/os/run/framebuffer.run
@@ -51,7 +51,7 @@ append_if [have_spec sdl] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -65,7 +65,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/os/run/mixer.run b/repos/os/run/mixer.run
index a7338998a5..2074b3a441 100644
--- a/repos/os/run/mixer.run
+++ b/repos/os/run/mixer.run
@@ -49,7 +49,7 @@ set config  {
 if {![have_spec linux]} {
 	append config {
 		<start name="acpi">
-			<resource name="RAM" quantum="2M"/>
+			<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 			<binary name="acpi_drv"/>
 			<provides>
 				<service name="PCI"/>
diff --git a/repos/os/run/network_test_nic.inc b/repos/os/run/network_test_nic.inc
index 0d3e988c42..3e8b186492 100644
--- a/repos/os/run/network_test_nic.inc
+++ b/repos/os/run/network_test_nic.inc
@@ -112,7 +112,7 @@ append_if $use_nic_client config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -126,7 +126,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports-foc/run/l4linux.run b/repos/ports-foc/run/l4linux.run
index d94af27951..0a0fa0513d 100644
--- a/repos/ports-foc/run/l4linux.run
+++ b/repos/ports-foc/run/l4linux.run
@@ -63,7 +63,7 @@ set config  {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -77,7 +77,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports-foc/run/l4linux_netperf.inc b/repos/ports-foc/run/l4linux_netperf.inc
index 70c6b0bbec..a218bc5558 100644
--- a/repos/ports-foc/run/l4linux_netperf.inc
+++ b/repos/ports-foc/run/l4linux_netperf.inc
@@ -97,7 +97,7 @@ set config  {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="12M"/>
+		<resource name="RAM" quantum="12M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -111,7 +111,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports/run/dosbox.run b/repos/ports/run/dosbox.run
index 192f7d744e..50ff60e3de 100644
--- a/repos/ports/run/dosbox.run
+++ b/repos/ports/run/dosbox.run
@@ -51,7 +51,7 @@ append_if [have_spec sdl] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
diff --git a/repos/ports/run/genode_org.run b/repos/ports/run/genode_org.run
index 35d49439b8..34bd5b9db9 100644
--- a/repos/ports/run/genode_org.run
+++ b/repos/ports/run/genode_org.run
@@ -89,7 +89,7 @@ append_if $use_nic_driver config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -103,7 +103,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports/run/netperf.inc b/repos/ports/run/netperf.inc
index 5b2fd55e6d..6e07efcd0b 100644
--- a/repos/ports/run/netperf.inc
+++ b/repos/ports/run/netperf.inc
@@ -150,7 +150,7 @@ append_if $use_nic_driver config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -164,7 +164,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports/run/noux_net_netcat.run b/repos/ports/run/noux_net_netcat.run
index 8985bb2ac3..df863c7e54 100644
--- a/repos/ports/run/noux_net_netcat.run
+++ b/repos/ports/run/noux_net_netcat.run
@@ -137,7 +137,7 @@ append_if $use_usb_driver config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="6M"/>
+		<resource name="RAM" quantum="6M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -151,7 +151,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 	
diff --git a/repos/ports/run/noux_tool_chain.inc b/repos/ports/run/noux_tool_chain.inc
index 346bfd4a71..bc095ec323 100644
--- a/repos/ports/run/noux_tool_chain.inc
+++ b/repos/ports/run/noux_tool_chain.inc
@@ -134,7 +134,7 @@ append_if [have_spec sdl] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -154,7 +154,7 @@ append_if [have_spec framebuffer] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start> }
 
diff --git a/repos/ports/run/noux_trace_fs.run b/repos/ports/run/noux_trace_fs.run
index 5da7d4da16..1db4eb2dde 100644
--- a/repos/ports/run/noux_trace_fs.run
+++ b/repos/ports/run/noux_trace_fs.run
@@ -94,7 +94,7 @@ append_if [have_spec sdl] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -108,7 +108,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv">
-		<resource name="RAM" quantum="5M"/>
+		<resource name="RAM" quantum="5M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 	</start>}
 
diff --git a/repos/ports/run/seoul.inc b/repos/ports/run/seoul.inc
index f4fdcad6ae..4a4b450935 100644
--- a/repos/ports/run/seoul.inc
+++ b/repos/ports/run/seoul.inc
@@ -196,7 +196,7 @@ append_if $use_genode_iso config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi" priority="-1">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -210,7 +210,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv" priority="-1">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="3M" constrain_phys="yes"/>
 		<provides><service name="PCI"/></provides>
 		<route> <any-service><parent/></any-service> </route>
 	</start>
diff --git a/repos/ports/run/virtualbox.run b/repos/ports/run/virtualbox.run
index 1aaf9ba37d..df39b48070 100644
--- a/repos/ports/run/virtualbox.run
+++ b/repos/ports/run/virtualbox.run
@@ -44,7 +44,7 @@ set config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi" priority="-1">
-		<resource name="RAM" quantum="8M"/>
+		<resource name="RAM" quantum="8M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -58,7 +58,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv" priority="-1">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>}
 
diff --git a/repos/ports/run/virtualbox_auto.inc b/repos/ports/run/virtualbox_auto.inc
index 8c99be0f97..1728274d59 100644
--- a/repos/ports/run/virtualbox_auto.inc
+++ b/repos/ports/run/virtualbox_auto.inc
@@ -91,7 +91,7 @@ append_if [expr $use_ram_fs] config {
 
 append_if [have_spec acpi] config {
 	<start name="acpi" priority="-1">
-		<resource name="RAM" quantum="10M"/>
+		<resource name="RAM" quantum="10M" constrain_phys="yes"/>
 		<binary name="acpi_drv"/>
 		<provides>
 			<service name="PCI"/>
@@ -105,7 +105,7 @@ append_if [have_spec acpi] config {
 
 append_if [expr ![have_spec acpi] && [have_spec pci]] config {
 	<start name="pci_drv" priority="-1">
-		<resource name="RAM" quantum="2M"/>
+		<resource name="RAM" quantum="2M" constrain_phys="yes"/>
 		<provides> <service name="PCI"/> </provides>
 	</start>}