[libvirt PATCH 2/4] qemu: add support for setting host-phys-bits-limit
Translate <maxphysaddr limit='39'/> to:
host-phys-bits-limit=39
https://gitlab.com/libvirt/libvirt/-/issues/450
https://bugzilla.redhat.com/show_bug.cgi?id=2171860
Signed-off-by: Ján Tomko <jtomko(a)redhat.com>
---
src/qemu/qemu_command.c | 3 ++
.../cpu-phys-bits-limit.x86_64-latest.args | 34 +++++++++++++++++++
tests/qemuxml2argvtest.c | 1 +
3 files changed, 38 insertions(+)
create mode 100644 tests/qemuxml2argvdata/cpu-phys-bits-limit.x86_64-latest.args
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 4839d45a34..7eae858813 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6450,6 +6450,9 @@ qemuBuildCpuCommandLine(virCommand *cmd,
switch (addr->mode) {
case VIR_CPU_MAX_PHYS_ADDR_MODE_PASSTHROUGH:
virBufferAddLit(&buf, ",host-phys-bits=on");
+
+ if (addr->limit > 0)
+ virBufferAsprintf(&buf, ",host-phys-bits-limit=%d",
addr->limit);
break;
case VIR_CPU_MAX_PHYS_ADDR_MODE_EMULATE:
diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-limit.x86_64-latest.args
b/tests/qemuxml2argvdata/cpu-phys-bits-limit.x86_64-latest.args
new file mode 100644
index 0000000000..a4652ba9f4
--- /dev/null
+++ b/tests/qemuxml2argvdata/cpu-phys-bits-limit.x86_64-latest.args
@@ -0,0 +1,34 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-foo \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-foo/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-foo/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-foo/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=foo,debug-threads=on \
+-S \
+-object
'{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-foo/master-key.aes"}'
\
+-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-accel kvm \
+-cpu host,migratable=on,host-phys-bits=on,host-phys-bits-limit=39 \
+-m 214 \
+-object
'{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}'
\
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device
'{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}'
\
+-audiodev
'{"id":"audio1","driver":"none"}' \
+-device
'{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}'
\
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 5a33c336c8..492f98b3f1 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2987,6 +2987,7 @@ mymain(void)
DO_TEST("cpu-phys-bits-emulate2", QEMU_CAPS_KVM);
DO_TEST_PARSE_ERROR("cpu-phys-bits-emulate3", QEMU_CAPS_KVM);
DO_TEST_PARSE_ERROR("cpu-phys-bits-passthrough2", QEMU_CAPS_KVM);
+ DO_TEST_CAPS_LATEST("cpu-phys-bits-limit");
DO_TEST_CAPS_VER("sgx-epc", "7.0.0");
--
2.39.2