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qemu: add support for setting host-phys-bits-limit

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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@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Ján Tomko 2023-03-01 12:31:41 +01:00
parent d6fbb21210
commit e3d95a1eba
3 changed files with 37 additions and 0 deletions
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3
src/qemu/qemu_command.c
View File

@ -6525,6 +6525,9 @@ 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:

33
tests/qemuxml2argvdata/cpu-phys-bits-limit.x86_64-latest.args Normal file
View File

@ -0,0 +1,33 @@
LC_ALL=C \
PATH=/bin \
HOME=/var/lib/libvirt/qemu/domain--1-foo \
USER=test \
LOGNAME=test \
XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-foo/.local/share \
XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-foo/.cache \
XDG_CONFIG_HOME=/var/lib/libvirt/qemu/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":"/var/lib/libvirt/qemu/domain--1-foo/master-key.aes"}' \
-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
-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 \
-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

1
tests/qemuxml2argvtest.c
View File

@ -2722,6 +2722,7 @@ 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");