[PATCH V2 3/4] qemu: Add support for max physical address size

From: Dario Faggioli <dfaggioli(a)suse.com&gt; This patch maps /domain/cpu/maxphysaddr into -cpu parameters: - <maxphysaddr mode='passthrough'/> becomes host-phys-bits=on - <maxphysaddr mode='emualte' bits='42'/> becomes phys-bits=42 Passthrough mode can only be used if the chosen CPU model is 'host-passthrough'. Also validate that an explicitly specified bits value does not exceed the physical address bits on the host. The feature is available since QEMU 2.7.0. Signed-off-by: Dario Faggioli <dfaggioli(a)suse.com&gt; Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; --- src/qemu/qemu_command.c | 21 +++++++++ src/qemu/qemu_domain.c | 46 +++++++++++++++++++ src/qemu/qemu_validate.c | 12 +++++ .../cpu-phys-bits-emulate.args | 32 +++++++++++++ .../cpu-phys-bits-emulate.xml | 20 ++++++++ .../cpu-phys-bits-emulate2.args | 32 +++++++++++++ .../cpu-phys-bits-emulate2.xml | 20 ++++++++ .../cpu-phys-bits-emulate3.err | 1 + .../cpu-phys-bits-emulate3.xml | 20 ++++++++ .../cpu-phys-bits-passthrough.args | 32 +++++++++++++ .../cpu-phys-bits-passthrough.xml | 20 ++++++++ .../cpu-phys-bits-passthrough2.err | 1 + .../cpu-phys-bits-passthrough2.xml | 20 ++++++++ .../cpu-phys-bits-passthrough3.err | 1 + .../cpu-phys-bits-passthrough3.xml | 20 ++++++++ tests/qemuxml2argvtest.c | 7 +++ 16 files changed, 305 insertions(+) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 30c9bbbf2e..acf214be00 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6847,6 +6847,27 @@ qemuBuildCpuCommandLine(virCommand *cmd, virBufferAddLit(&buf, ",l3-cache=off"); } + if (def->cpu && def->cpu->addr) { + virCPUMaxPhysAddrDef *addr = def->cpu->addr; + + switch (addr->mode) { + case VIR_CPU_MAX_PHYS_ADDR_MODE_PASSTHROUGH: + virBufferAddLit(&buf, ",host-phys-bits=on"); + break; + + case VIR_CPU_MAX_PHYS_ADDR_MODE_EMULATE: + if (addr->bits != -1) + virBufferAsprintf(&buf, ",phys-bits=%d", addr->bits); + else + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Physical address bits unspecified")); + break; + + case VIR_CPU_MAX_PHYS_ADDR_MODE_LAST: + break; + } + } + cpu = virBufferContentAndReset(&cpu_buf); cpu_flags = virBufferContentAndReset(&buf); diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index b02ffc9a2e..0c97744b72 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -4429,6 +4429,52 @@ qemuDomainDefCPUPostParse(virDomainDef *def, } } + if (def->cpu->addr) { + virCPUMaxPhysAddrDef *addr = def->cpu->addr; + + if (!ARCH_IS_X86(def->os.arch)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("CPU maximum physical address bits specification " + "is not supported for '%s' architecture"), + virArchToString(def->os.arch)); + return -1; + } + + switch (addr->mode) { + case VIR_CPU_MAX_PHYS_ADDR_MODE_PASSTHROUGH: + if (def->cpu->mode != VIR_CPU_MODE_HOST_PASSTHROUGH) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("CPU maximum physical address bits mode '%s' " + "can only be used with '%s' CPUs"), + virCPUMaxPhysAddrModeTypeToString(addr->mode), + virCPUModeTypeToString(VIR_CPU_MODE_HOST_PASSTHROUGH)); + return -1; + } + if (addr->bits != -1) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("CPU maximum physical address bits number " + "specification cannot be used with " + "mode='%s'"), + virCPUMaxPhysAddrModeTypeToString(VIR_CPU_MAX_PHYS_ADDR_MODE_PASSTHROUGH)); + return -1; + } + break; + + case VIR_CPU_MAX_PHYS_ADDR_MODE_EMULATE: + if (addr->bits == -1) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("if using CPU maximum physical address " + "mode='%s', bits= must be specified too"), + virCPUMaxPhysAddrModeTypeToString(VIR_CPU_MAX_PHYS_ADDR_MODE_EMULATE)); + return -1; + } + break; + + case VIR_CPU_MAX_PHYS_ADDR_MODE_LAST: + break; + } + } + for (i = 0; i < def->cpu->nfeatures; i++) { virCPUFeatureDef *feature = &def->cpu->features[i]; diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index 764d5b029e..b6c7d3b06a 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -380,6 +380,18 @@ qemuValidateDomainDefCpu(virQEMUDriver *driver, break; } + if (cpu->addr && + cpu->addr->mode == VIR_CPU_MAX_PHYS_ADDR_MODE_EMULATE && + driver->hostcpu && + driver->hostcpu->addr) { + if (cpu->addr->bits > driver->hostcpu->addr->bits) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("The number of virtual CPU address bits cannot " + "exceed the number supported by the host CPU")); + return -1; + } + } + return 0; } diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate.args b/tests/qemuxml2argvdata/cpu-phys-bits-emulate.args new file mode 100644 index 0000000000..f612f6889b --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate.args @@ -0,0 +1,32 @@ +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 \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-x86_64 \ +-name guest=foo,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-foo/master-key.aes \ +-machine pc,usb=off,dump-guest-core=off \ +-accel kvm \ +-cpu host,phys-bits=42 \ +-m 214 \ +-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 \ +-usb \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate.xml b/tests/qemuxml2argvdata/cpu-phys-bits-emulate.xml new file mode 100644 index 0000000000..f8bd63bc68 --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-passthrough'> + <maxphysaddr mode='emulate' bits='42'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.args b/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.args new file mode 100644 index 0000000000..3489f44ded --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.args @@ -0,0 +1,32 @@ +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 \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-x86_64 \ +-name guest=foo,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-foo/master-key.aes \ +-machine pc,usb=off,dump-guest-core=off \ +-accel kvm \ +-cpu core2duo,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,ds-cpl=on,vmx=on,est=on,tm2=on,cx16=on,xtpr=on,lahf-lm=on,phys-bits=42 \ +-m 214 \ +-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 \ +-usb \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.xml b/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.xml new file mode 100644 index 0000000000..188b3066ed --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate2.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-model'> + <maxphysaddr bits='42' mode='emulate'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.err b/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.err new file mode 100644 index 0000000000..5e21998259 --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.err @@ -0,0 +1 @@ +unsupported configuration: if using CPU maximum physical address mode='emulate', bits= must be specified too diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.xml b/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.xml new file mode 100644 index 0000000000..30a14894dd --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-emulate3.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-passthrough'> + <maxphysaddr mode='emulate'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.args b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.args new file mode 100644 index 0000000000..df04195d1e --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.args @@ -0,0 +1,32 @@ +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 \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-x86_64 \ +-name guest=foo,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-foo/master-key.aes \ +-machine pc,usb=off,dump-guest-core=off \ +-accel kvm \ +-cpu host,host-phys-bits=on \ +-m 214 \ +-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 \ +-usb \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.xml b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.xml new file mode 100644 index 0000000000..db570beb8d --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-passthrough'> + <maxphysaddr mode='passthrough'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.err b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.err new file mode 100644 index 0000000000..22009cc6e6 --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.err @@ -0,0 +1 @@ +unsupported configuration: CPU maximum physical address bits mode 'passthrough' can only be used with 'host-passthrough' CPUs diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.xml b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.xml new file mode 100644 index 0000000000..511bbf9949 --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough2.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-model'> + <maxphysaddr mode='passthrough'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.err b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.err new file mode 100644 index 0000000000..28f2e43432 --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.err @@ -0,0 +1 @@ +unsupported configuration: CPU maximum physical address bits number specification cannot be used with mode='passthrough' diff --git a/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.xml b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.xml new file mode 100644 index 0000000000..a94e567dcb --- /dev/null +++ b/tests/qemuxml2argvdata/cpu-phys-bits-passthrough3.xml @@ -0,0 +1,20 @@ +<domain type='kvm'> + <name>foo</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='host-passthrough'> + <maxphysaddr mode='passthrough' bits='42'/> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index b72d61c3bc..4fd5120b70 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -3470,6 +3470,13 @@ mymain(void) /* HVF guests should not work on Linux with KVM */ DO_TEST_CAPS_LATEST_PARSE_ERROR("hvf-x86_64-q35-headless"); + DO_TEST("cpu-phys-bits-passthrough", QEMU_CAPS_KVM); + DO_TEST("cpu-phys-bits-emulate", QEMU_CAPS_KVM); + 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_PARSE_ERROR("cpu-phys-bits-passthrough3", QEMU_CAPS_KVM); + if (getenv("LIBVIRT_SKIP_CLEANUP") == NULL) virFileDeleteTree(fakerootdir); -- 2.36.1