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qemu: Generate command line for tb-cache feature

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Generating command line is pretty easy - just put tb-size=XXX
onto -accel tcg part. Note, that QEMU expects the size in MiB.

Resolves: https://gitlab.com/libvirt/libvirt/-/issues/229
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Michal Privoznik 2021-11-04 11:43:52 +01:00
parent 16159d5152
commit 58bf03f85e
3 changed files with 43 additions and 0 deletions
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6
src/qemu/qemu_command.c
View File

@ -7200,6 +7200,12 @@ qemuBuildAccelCommandLine(virCommand *cmd,
switch ((virDomainVirtType)def->virtType) {
case VIR_DOMAIN_VIRT_QEMU:
virBufferAddLit(&buf, "tcg");
if (def->features[VIR_DOMAIN_FEATURE_TCG] == VIR_TRISTATE_SWITCH_ON &&
def->tcg_features->tb_cache > 0) {
virBufferAsprintf(&buf, ",tb-size=%llu",
def->tcg_features->tb_cache >> 10);
}
break;
case VIR_DOMAIN_VIRT_KVM:

36
tests/qemuxml2argvdata/x86_64-default-cpu-tcg-features.x86_64-latest.args Normal file
View File

@ -0,0 +1,36 @@
LC_ALL=C \
PATH=/bin \
HOME=/tmp/lib/domain--1-guest \
USER=test \
LOGNAME=test \
XDG_DATA_HOME=/tmp/lib/domain--1-guest/.local/share \
XDG_CACHE_HOME=/tmp/lib/domain--1-guest/.cache \
XDG_CONFIG_HOME=/tmp/lib/domain--1-guest/.config \
/usr/bin/qemu-system-x86_64 \
-name guest=guest,debug-threads=on \
-S \
-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-guest/master-key.aes"}' \
-machine pc-q35-6.2,usb=off,dump-guest-core=off,memory-backend=pc.ram \
-accel tcg,tb-size=100 \
-cpu qemu64 \
-m 4096 \
-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":4294967296}' \
-overcommit mem-lock=off \
-smp 4,sockets=4,cores=1,threads=1 \
-uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
-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":"pcie-root-port","port":8,"chassis":1,"id":"pci.1","bus":"pcie.0","multifunction":true,"addr":"0x1"}' \
-device '{"driver":"pcie-root-port","port":9,"chassis":2,"id":"pci.2","bus":"pcie.0","addr":"0x1.0x1"}' \
-device '{"driver":"pcie-root-port","port":10,"chassis":3,"id":"pci.3","bus":"pcie.0","addr":"0x1.0x2"}' \
-device '{"driver":"qemu-xhci","id":"usb","bus":"pci.1","addr":"0x0"}' \
-audiodev '{"id":"audio1","driver":"none"}' \
-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.2","addr":"0x0"}' \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
-msg timestamp=on

1
tests/qemuxml2argvtest.c
View File

@ -3486,6 +3486,7 @@ mymain(void)
DO_TEST_CAPS_ARCH_LATEST("x86_64-default-cpu-tcg-pc-4.2", "x86_64");
DO_TEST_CAPS_ARCH_LATEST("x86_64-default-cpu-kvm-q35-4.2", "x86_64");
DO_TEST_CAPS_ARCH_LATEST("x86_64-default-cpu-tcg-q35-4.2", "x86_64");
DO_TEST_CAPS_ARCH_LATEST("x86_64-default-cpu-tcg-features", "x86_64");
DO_TEST_CAPS_LATEST("virtio-9p-multidevs");
DO_TEST_CAPS_LATEST("virtio-9p-createmode");