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[libvirt] [PATCH v2] docs: Provide documentation for SEV launch security
by Erik Skultety 02 Jul '19

02 Jul '19

Signed-off-by: Erik Skultety <eskultet(a)redhat.com> --- docs/launch_security_sev.html.in | 516 +++++++++++++++++++++++++++++++ 1 file changed, 516 insertions(+) create mode 100644 docs/launch_security_sev.html.in diff --git a/docs/launch_security_sev.html.in b/docs/launch_security_sev.html.in new file mode 100644 index 0000000000..2f0f89d714 --- /dev/null +++ b/docs/launch_security_sev.html.in @@ -0,0 +1,516 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html> +<html xmlns="http://www.w3.org/1999/xhtml"> + <body> + <h1>Launch security with AMD SEV</h1> + + <ul id="toc"></ul> + + <p> + Storage encryption in modern public cloud computing is a common practice. + However, from the point of view of a user of these cloud workloads, a + significant amount of trust needs to be put in the cloud platform security as + well as integrity (was the hypervisor tampered?). For this reason there's ever + rising demand for securing data in use, i.e. memory encryption. + One of the solutions addressing this matter is AMD SEV. + </p> + + <h2>AMD SEV</h2> + <p> + SEV (Secure Encrypted Virtualization) is a feature extension of AMD's SME (Secure + Memory Encryption) intended for KVM virtual machines which is supported + primarily on AMD's EPYC CPU line. In contrast to SME, SEV uses a unique memory encryption + key for each VM. The whole encryption of memory pages is completely transparent + to the hypervisor and happens in the AMD firmware. + For more details about the technology itself, you can visit + <a href="https://developer.amd.com/sev/">AMD's developer portal</a>. + </p> + + <h2><a id="Host">Enabling SEV on the host</a></h2> + <p> + Before VMs can make use of the SEV feature you need to make sure your + AMD CPU does support SEV. You can check whether SEV is among the CPU + flags with: + </p> + + <pre> +$ cat /proc/cpuinfo | grep sev +... +sme ssbd sev ibpb</pre> + + <p> + Next step is to enable SEV in the kernel, because it is disabled by default. + This is done by putting the following onto the kernel command line: + </p> + + <pre> +mem_encrypt=on kvm_amd.sev=1 + </pre> + + <p> + To make the changes persistent, append the above to the variable holding + parameters of the kernel command line in + <code>/etc/default/grub</code> to preserve SEV settings across reboots + </p> + + <pre> +$ cat /etc/default/grub +... +GRUB_CMDLINE_LINUX="... mem_encrypt=on kvm_amd.sev=1" +$ grub2-mkconfig -o /boot/efi/EFI/<distro>/grub.cfg</pre> + + <p> + <code>mem_encrypt=on</code> turns on the SME memory encryption feature on + the host which is required for SEV to work. The <code>kvm_amd.sev</code> + parameter actually enables SEV in the kvm module. It can be set on the + command line alongside <code>mem_encrypt</code> like shown above, or it + can be put into a module config under <code>/etc/modprobe.d/</code> + </p> + + <pre> +$ cat /etc/modprobe.d/sev.conf +options kvm_amd sev=1 + </pre> + + <p> + After rebooting the host, you should see SEV being enabled in the kernel: + </p> + + <pre> +$ cat /sys/module/kvm_amd/parameters/sev +1 + </pre> + + <h2><a id="Virt">Checking SEV support in the virt stack</a></h2> + <p> + <b>Note: All of the commands bellow need to be run with root privileges.</b> + </p> + + <p> + First make sure you have the following packages in the specified versions: + </p> + + <ul> + <li> + libvirt >= 4.5.0 (>5.1.0 recommended due to additional SEV bugfixes) + </li> + <li> + QEMU >= 2.12.0 + </li> + </ul> + <p> + To confirm that the virtualization stack supports SEV, run the following: + </p> + + <pre> +# virsh domcapabilities +<domainCapabilities> +... + <features> + ... + <sev supported='yes'> + <cbitpos>47</cbitpos> + <reducedPhysBits>1</reducedPhysBits> + </sev> + ... + </features> +</domainCapabilities></pre> + <p> + Note that if libvirt was already installed and libvirtd running before enabling SEV in the kernel followed by the host reboot you need to force libvirtd + to re-probe both the host and QEMU capabilities. First stop libvirtd: + </p> + + <pre> +# systemctl stop libvirtd.service + </pre> + + <p> + Now you need to clean the capabilities cache: + </p> + + <pre> +# rm -f /var/cache/libvirt/qemu/capabilities/* + </pre> + + <p> + If you now restart libvirtd, it will re-probe the capabilities and if + you now run: + </p> + + <pre> +# virsh domcapabilities + </pre> + + <p> + SEV should be listed as supported. If you still see: + </p> + + <pre> +<sev supported='no'/> + </pre> + + <p> + it means one of two things: + <ol> + <li> + libvirt does support SEV, but either QEMU or the host does not + </li> + <li> + you have libvirt <=5.1.0 which suffered from getting a + <code>'Permission denied'</code> on <code>/dev/sev</code> because + of the default permissions on the character device which prevented + QEMU from opening it during capabilities probing - you can either + manually tweak the permissions so that QEMU has access to it or + preferably install libvirt 5.1.0 or higher + </li> + </ol> + </p> + + <h2><a id="Configuration">VM Configuration</a></h2> + <p> + SEV is enabled in the XML by specifying the + <a href="https://libvirt.org/formatdomain.html#launchSecurity"><launchSecurity> </a> element. However, specifying <code>launchSecurity</code> isn't + enough to boot an SEV VM. Further configuration requirements are discussed + below. + </p> + + <h3><a id="Machine">Machine type</a></h3> + <p> + Even though both Q35 and legacy PC machine types (for PC see also + "virtio") can be used with SEV, usage of the legacy PC machine type is + strongly discouraged, since depending on how your OVMF package was + built (e.g. including features like SecureBoot or SMM) Q35 may even be + required. + </p> + + <h5>Q35</h5> +<pre> +... +<os> + <type arch='x86_64' machine='pc-q35-3.0'>hvm</type> + ... +</os> +...</pre> + + <h5>i440fx (discouraged)</h5> + <pre> +... +<os> + <type arch='x86_64' machine='pc-i440fx-3.0'>hvm</type> + ... +</os> +... + </pre> + + <h3><a id="Boot">Boot loader</a></h3> + <p> + SEV is only going to work with OVMF (UEFI), so you'll need to point libvirt to + the correct OVMF binary. + </p> + <pre> +... +<os> + <type arch='x86_64' machine='pc-q35-3.0'>hvm</type> + <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader> +</os> +...</pre> + + <h3><a id="Memory">Memory</a></h3> + <p> + Internally, SEV expects that the encrypted memory pages won't be swapped out or move + around so the VM memory needs to be pinned in physical RAM which will be + handled by QEMU. Apart from that, certain memory regions allocated by QEMU + itself (UEFI pflash, device ROMs, video RAM, etc.) have to be encrypted as + well. This causes a conflict in how libvirt tries to protect the host. + By default, libvirt enforces a memory hard limit on each VM's cgroup in order + to protect the host from malicious QEMU to allocate and lock all the available + memory. This limit corresponds to the total memory allocation for the VM given + by <code><currentMemory></code> element. However, trying to account for the additional + memory regions QEMU allocates when calculating the limit in an automated manner + is non-deterministic. One way to resolve this is to set the hard limit manually. + + <p> + Note: Figuring out the right number so that your guest boots and isn't killed is + challenging, but 256MiB extra memory over the total guest RAM should suffice for + most workloads and may serve as a good starting point. + + For example, a domain with 4GB memory with a 256MiB extra hard limit would look + like this: + </p> + </p> + + <pre> +# virsh edit <domain> +<domain> + ... + <currentMemory unit='KiB'>4194304</currentMemory> + <memtune> + <hard_limit unit='KiB'>4456448</hard_limit> + </memtune> + ... +</domain></pre> + <p> + There's another, preferred method of taking care of the limits by + using the<code><memoryBacking></code> element along with the + <code><locked/></code> subelement: + </p> + + <pre> +<domain> + ... + <memoryBacking> + <locked/> + </memoryBacking> + ... +</domain></pre> + + <p> + What that does is that it tells libvirt not to force any hard limit (well, + unlimited) upon the VM cgroup. The obvious advantage is that one doesn't need + to determine the hard limit for every single SEV-enabled VM. However, there is + a significant security-related drawback to this approach. Since no hard limit + is applied, a malicious QEMU could perform a DoS attack by locking all of the + host's available memory. The way to avoid this issue and to protect the host is + to enforce a bigger hard limit on the master cgroup containing all of the VMs + - on systemd this is <code>machine.slice</code>. + </p> + + <pre> +# systemctl set-property machine.slice MemoryHigh=<value></pre> + + <p> + To put even stricter measures in place which would involve the OOM killer, use + <pre> +# systemctl set-property machine.slice MemoryMax=<value></pre> + instead. Alternatively, you can create a systemd config (don't forget + to reload systemd configuration in this case): + <pre> +# cat << EOF > /etc/systemd/system.control/machine.slice.d/90-MemoryMax.conf +MemoryMax=<value> +EOF</pre> + The trade-off to keep in mind with the second approach is that the VMs + can still perform DoS on each other. + </p> + + <h3><a id="Virtio">Virtio</a></h3> + <p> + In order to make virtio devices work, we need to enable emulated IOMMU + on the devices so that virtual DMA can work. + </p> + + <pre> +# virsh edit <domain> +<domain> + ... + <controller type='virtio-serial' index='0'> + <driver iommu='on'/> + </controller> + <controller type='scsi' index='0' model='virtio-scsi'> + <driver iommu='on'/> + </controller> + ... + <memballoon model='virtio'> + <driver iommu='on'/> + </memballoon> + <rng model='virtio'> + <backend model='random'>/dev/urandom</backend> + <driver iommu='on'/> + </rng> + ... +<domain></pre> + + <p> + If you for some reason want to use the legacy PC machine type, further changes + to the virtio + configuration is required, because SEV will not work with Virtio <1.0. In + libvirt, this is handled by using the virtio-non-transitional device model + (libvirt >= 5.2.0 required). + + <p> + Note: some devices like video devices don't + support non-transitional model, which means that virtio GPU cannot be used. + </p> + </p> + + <pre> +<domain> + ... + <devices> + ... + <memballoon model='virtio-non-transitional'> + <driver iommu='on'/> + </memballoon> + </devices> + ... +</domain></pre> + + <h2><a id="Limitations">Limitations</a></h2> + <p> + Currently, the boot disk cannot be of type virtio-blk, instead, virtio-scsi + needs to be used if virtio is desired. This limitation is expected to be lifted + with future releases of kernel (the kernel used at the time of writing the + article is 5.0.14). + If you still cannot start an SEV VM, it could be because of wrong SELinux label on the <code>/dev/sev</code> device with selinux-policy <3.14.2.40 which prevents QEMU from touching the device. This can be resolved by upgrading the package, tuning the selinux policy rules manually to allow svirt_t to access the device (see <code>audit2allow</code> on how to do that) or putting SELinux into permissive mode (discouraged). + </p> + + <h2><a id="Examples">Full domain XML examples</a></h2> + + <h5>Q35 machine</h5> + <pre> +<domain type='kvm'> + <name>sev-dummy</name> + <memory unit='KiB'>4194304</memory> + <currentMemory unit='KiB'>4194304</currentMemory> + <memoryBacking> + <locked/> + </memoryBacking> + <vcpu placement='static'>4</vcpu> + <os> + <type arch='x86_64' machine='pc-q35-3.0'>hvm</type> + <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader> + <nvram>/var/lib/libvirt/qemu/nvram/sev-dummy_VARS.fd</nvram> + </os> + <features> + <acpi/> + <apic/> + <vmport state='off'/> + </features> + <cpu mode='host-model' check='partial'> + <model fallback='allow'/> + </cpu> + <clock offset='utc'> + <timer name='rtc' tickpolicy='catchup'/> + <timer name='pit' tickpolicy='delay'/> + <timer name='hpet' present='no'/> + </clock> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <pm> + <suspend-to-mem enabled='no'/> + <suspend-to-disk enabled='no'/> + </pm> + <devices> + <emulator>/usr/bin/qemu-kvm</emulator> + <disk type='file' device='disk'> + <driver name='qemu' type='qcow2'/> + <source file='/var/lib/libvirt/images/sev-dummy.qcow2'/> + <target dev='sda' bus='scsi'/> + <boot order='1'/> + </disk> + <controller type='virtio-serial' index='0'> + <driver iommu='on'/> + </controller> + <controller type='scsi' index='0' model='virtio-scsi'> + <driver iommu='on'/> + </controller> + <interface type='network'> + <mac address='52:54:00:cc:56:90'/> + <source network='default'/> + <model type='virtio'/> + <driver iommu='on'/> + </interface> + <graphics type='spice' autoport='yes'> + <listen type='address'/> + <gl enable='no'/> + </graphics> + <video> + <model type='qxl'/> + </video> + <memballoon model='virtio'> + <driver iommu='on'/> + </memballoon> + <rng model='virtio'> + <driver iommu='on'/> + </rng> + </devices> + <launchSecurity type='sev'> + <cbitpos>47</cbitpos> + <reducedPhysBits>1</reducedPhysBits> + <policy>0x0003</policy> + </launchSecurity> +</domain></pre> + + <h5>PC-i440fx machine:</h5> + <pre> +<domain type='kvm'> + <name>sev-dummy-legacy</name> + <memory unit='KiB'>4194304</memory> + <currentMemory unit='KiB'>4194304</currentMemory> + <memtune> + <hard_limit unit='KiB'>5242880</hard_limit> + </memtune> + <vcpu placement='static'>4</vcpu> + <os> + <type arch='x86_64' machine='pc-i440fx-3.0'>hvm</type> + <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader> + <nvram>/var/lib/libvirt/qemu/nvram/sev-dummy_VARS.fd</nvram> + <boot dev='hd'/> + </os> + <features> + <acpi/> + <apic/> + <vmport state='off'/> + </features> + <cpu mode='host-model' check='partial'> + <model fallback='allow'/> + </cpu> + <clock offset='utc'> + <timer name='rtc' tickpolicy='catchup'/> + <timer name='pit' tickpolicy='delay'/> + <timer name='hpet' present='no'/> + </clock> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <pm> + <suspend-to-mem enabled='no'/> + <suspend-to-disk enabled='no'/> + </pm> + <devices> + <emulator>/usr/bin/qemu-kvm</emulator> + <disk type='file' device='disk'> + <driver name='qemu' type='qcow2'/> + <source file='/var/lib/libvirt/images/sev-dummy-seabios.qcow2'/> + <target dev='sda' bus='sata'/> + </disk> + <interface type='network'> + <mac address='52:54:00:d8:96:c8'/> + <source network='default'/> + <model type='virtio-non-transitional'/> + </interface> + <serial type='pty'> + <target type='isa-serial' port='0'> + <model name='isa-serial'/> + </target> + </serial> + <console type='pty'> + <target type='serial' port='0'/> + </console> + <input type='tablet' bus='usb'> + <address type='usb' bus='0' port='1'/> + </input> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <graphics type='spice' autoport='yes'> + <listen type='address'/> + <gl enable='no'/> + </graphics> + <video> + <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/> + </video> + <memballoon model='virtio-non-transitional'> + <driver iommu='on'/> + </memballoon> + <rng model='virtio-non-transitional'> + <driver iommu='on'/> + </rng> + </devices> + <launchSecurity type='sev'> + <cbitpos>47</cbitpos> + <reducedPhysBits>1</reducedPhysBits> + <policy>0x0003</policy> + </launchSecurity> +</domain></pre> + </body> +</html> -- 2.21.0

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[libvirt] [PATCH 0/4] test_driver: implement some DomainGetParametersAPIs
by Ilias Stamatis 02 Jul '19

02 Jul '19

Ilias Stamatis (4): test_driver: introduce TEST_SET_PARAM macro test_driver: implement virDomainGetMemoryParameters test_driver: implement virDomainGetNumaParameters test_driver: implement testDomainGetInterfaceParameters src/test/test_driver.c | 157 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) -- 2.22.0

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[libvirt] [PATCH 0/2] test_driver: add a disk device and implement
by Ilias Stamatis 02 Jul '19

02 Jul '19

Ilias Stamatis (2): test_driver: add a disk device in the default config test_driver: implement virDomainGetFSInfo src/test/test_driver.c | 71 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) -- 2.22.0

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[libvirt] [PATCH] test_driver: fix some bugs on testDomainGetDiskErrors
by Ilias Stamatis 02 Jul '19

02 Jul '19

The current implementation has the following bugs: - the vm variable is accessed after calling virDomainObjEndAPI on it - if VIR_STRDUP fails and we jump to the cleanup section, we're calling VIR_FREE on pointers for which we haven't allocated memory - the error type VIR_DOMAIN_DISK_ERROR_NONE is used which contradicts the documentation of the API that says that disks with no errors are not reported This patch fixes all of them and additionally reports errors only for every second disk (instead of reporting errors for all disks) which was the initial intention. Signed-off-by: Ilias Stamatis <stamatis.iliass(a)gmail.com> --- src/test/test_driver.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/src/test/test_driver.c b/src/test/test_driver.c index 2a0ffbc6c5..a7e40112d1 100755 --- a/src/test/test_driver.c +++ b/src/test/test_driver.c @@ -3246,6 +3246,7 @@ static int testDomainGetDiskErrors(virDomainPtr dom, unsigned int flags) { virDomainObjPtr vm = NULL; + int n = 0; int ret = -1; size_t i; @@ -3258,12 +3259,13 @@ static int testDomainGetDiskErrors(virDomainPtr dom, goto cleanup; if (errors) { - for (i = 0; i < MIN(vm->def->ndisks, maxerrors); i++) { - if (VIR_STRDUP(errors[i].disk, vm->def->disks[i]->dst) < 0) + for (i = 1; i < vm->def->ndisks && n < maxerrors; i += 2) { + if (VIR_STRDUP(errors[n].disk, vm->def->disks[i]->dst) < 0) goto cleanup; - errors[i].error = i % VIR_DOMAIN_DISK_ERROR_LAST; + errors[n].error = (n % (VIR_DOMAIN_DISK_ERROR_LAST - 1)) + 1; + n++; } - ret = i; + ret = n; } else { ret = vm->def->ndisks; } @@ -3271,7 +3273,7 @@ static int testDomainGetDiskErrors(virDomainPtr dom, cleanup: virDomainObjEndAPI(&vm); if (ret < 0) { - for (i = 0; i < MIN(vm->def->ndisks, maxerrors); i++) + for (i = 0; i < n; i++) VIR_FREE(errors[i].disk); } return ret; -- 2.22.0

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[libvirt] Checking the expected behavior on dynamic image file ownership when live migrating
by Christian Ehrhardt 02 Jul '19

02 Jul '19

Hi, today I was debugging an issue that I found with qemu 4.0 and ended up puzzled about file ownership. I'm almost EOD now, but wanted to reach out here for a sanity check before I debug further. The case sumamrized is this: 1. start guest 1.1 image files are changed to libvirt-qemu:kvm (which matches Ubuntus user/group config) 2. live migrate the guest to a different node 2.1 image files go back to root:root which they initially had (ok) 3. migrate guest back to the original node x. image files stay root:root and are not changed back to libvirt-qemu:kvm That is odd/unexpected, but it seems the same applies to older versions and there it was never a problem so far. In my case I stumbled over it because the newer qemu --copy-storage-* options now want to re-open the file at some point and that fails with: error: internal error: unable to execute QEMU command 'drive-mirror': Could not reopen file: Permission denied If I e.g. shut down and start the guest on the source node (which fixes up the ownership at runtime) then migration with copy-storage works fine again. I'm mostly looking for hints if this is a known issue or being worked on to not waste time tomorrow. So hints are welcome. -- Christian Ehrhardt Software Engineer, Ubuntu Server Canonical Ltd

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[libvirt] [PATCH v2] test_driver: implement virDomainGetMemoryParameters
by Ilias Stamatis 02 Jul '19

02 Jul '19

Signed-off-by: Ilias Stamatis <stamatis.iliass(a)gmail.com> --- Things changed since v1: - virDomainObjGetOneDef is used in order to get the appropriate def - the TEST_ASSIGN_MEM_PARAM macro got removed src/test/test_driver.c | 52 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/src/test/test_driver.c b/src/test/test_driver.c index 4b1f2724a0..01b3ed88f3 100755 --- a/src/test/test_driver.c +++ b/src/test/test_driver.c @@ -2514,6 +2514,57 @@ testDomainGetMaxVcpus(virDomainPtr domain) VIR_DOMAIN_VCPU_MAXIMUM)); } + +static int +testDomainGetMemoryParameters(virDomainPtr dom, + virTypedParameterPtr params, + int *nparams, + unsigned int flags) +{ + int ret = -1; + virDomainObjPtr vm = NULL; + virDomainDefPtr def = NULL; + + virCheckFlags(VIR_DOMAIN_AFFECT_LIVE | + VIR_DOMAIN_AFFECT_CONFIG | + VIR_TYPED_PARAM_STRING_OKAY, -1); + + if ((*nparams) == 0) { + *nparams = 3; + return 0; + } + + if (!(vm = testDomObjFromDomain(dom))) + goto cleanup; + + if (!(def = virDomainObjGetOneDef(vm, flags))) + goto cleanup; + + if (*nparams > 0 && + virTypedParameterAssign(&params[0], VIR_DOMAIN_MEMORY_HARD_LIMIT, + VIR_TYPED_PARAM_ULLONG, def->mem.hard_limit) < 0) + goto cleanup; + + if (*nparams > 1 && + virTypedParameterAssign(&params[1], VIR_DOMAIN_MEMORY_SOFT_LIMIT, + VIR_TYPED_PARAM_ULLONG, def->mem.soft_limit) < 0) + goto cleanup; + + if (*nparams > 2 && + virTypedParameterAssign(&params[2], VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, + VIR_TYPED_PARAM_ULLONG, def->mem.swap_hard_limit) < 0) + goto cleanup; + + if (*nparams > 3) + *nparams = 3; + + ret = 0; + cleanup: + virDomainObjEndAPI(&vm); + return ret; +} + + static int testDomainSetVcpusFlags(virDomainPtr domain, unsigned int nrCpus, unsigned int flags) @@ -7275,6 +7326,7 @@ static virHypervisorDriver testHypervisorDriver = { .domainGetVcpus = testDomainGetVcpus, /* 0.7.3 */ .domainGetVcpuPinInfo = testDomainGetVcpuPinInfo, /* 1.2.18 */ .domainGetMaxVcpus = testDomainGetMaxVcpus, /* 0.7.3 */ + .domainGetMemoryParameters = testDomainGetMemoryParameters, /* 5.6.0 */ .domainGetXMLDesc = testDomainGetXMLDesc, /* 0.1.4 */ .connectListDefinedDomains = testConnectListDefinedDomains, /* 0.1.11 */ .connectNumOfDefinedDomains = testConnectNumOfDefinedDomains, /* 0.1.11 */ -- 2.22.0

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[libvirt] [PATCH v2] test_driver: implement virDomainGetInterfaceParameters
by Ilias Stamatis 02 Jul '19

02 Jul '19

Signed-off-by: Ilias Stamatis <stamatis.iliass(a)gmail.com> --- The only thing changed since v1 is calling virDomainObjGetOneDef to get the appropriate def pointer. src/test/test_driver.c | 104 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/src/test/test_driver.c b/src/test/test_driver.c index 4b1f2724a0..dd756ed8bd 100755 --- a/src/test/test_driver.c +++ b/src/test/test_driver.c @@ -1964,6 +1964,109 @@ static int testDomainGetInfo(virDomainPtr domain, return ret; } + +static int +testDomainGetInterfaceParameters(virDomainPtr dom, + const char *device, + virTypedParameterPtr params, + int *nparams, + unsigned int flags) +{ + size_t i; + virDomainObjPtr vm = NULL; + virDomainDefPtr def = NULL; + virDomainNetDefPtr net = NULL; + int ret = -1; + + virCheckFlags(VIR_DOMAIN_AFFECT_LIVE | + VIR_DOMAIN_AFFECT_CONFIG | + VIR_TYPED_PARAM_STRING_OKAY, -1); + + if ((*nparams) == 0) { + *nparams = 7; + return 0; + } + + if (!(vm = testDomObjFromDomain(dom))) + return -1; + + if (!(def = virDomainObjGetOneDef(vm, flags))) + goto cleanup; + + if (!(net = virDomainNetFind(def, device))) + goto cleanup; + + for (i = 0; i < *nparams && i < 7; i++) { + switch (i) { + case 0: /* inbound.average */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_IN_AVERAGE, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->in) + params[i].value.ui = net->bandwidth->in->average; + break; + case 1: /* inbound.peak */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_IN_PEAK, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->in) + params[i].value.ui = net->bandwidth->in->peak; + break; + case 2: /* inbound.burst */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_IN_BURST, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->in) + params[i].value.ui = net->bandwidth->in->burst; + break; + case 3: /* inbound.floor */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_IN_FLOOR, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->in) + params[i].value.ui = net->bandwidth->in->floor; + break; + case 4: /* outbound.average */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_OUT_AVERAGE, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->out) + params[i].value.ui = net->bandwidth->out->average; + break; + case 5: /* outbound.peak */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_OUT_PEAK, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->out) + params[i].value.ui = net->bandwidth->out->peak; + break; + case 6: /* outbound.burst */ + if (virTypedParameterAssign(&params[i], + VIR_DOMAIN_BANDWIDTH_OUT_BURST, + VIR_TYPED_PARAM_UINT, 0) < 0) + goto cleanup; + if (net->bandwidth && net->bandwidth->out) + params[i].value.ui = net->bandwidth->out->burst; + break; + } + } + + if (*nparams > 7) + *nparams = 7; + + ret = 0; + cleanup: + virDomainObjEndAPI(&vm); + return ret; +} + + static int testDomainGetState(virDomainPtr domain, int *state, @@ -7258,6 +7361,7 @@ static virHypervisorDriver testHypervisorDriver = { .domainSetMemory = testDomainSetMemory, /* 0.1.4 */ .domainGetHostname = testDomainGetHostname, /* 5.5.0 */ .domainGetInfo = testDomainGetInfo, /* 0.1.1 */ + .domainGetInterfaceParameters = testDomainGetInterfaceParameters, /* 5.6.0 */ .domainGetState = testDomainGetState, /* 0.9.2 */ .domainGetTime = testDomainGetTime, /* 5.4.0 */ .domainSave = testDomainSave, /* 0.3.2 */ -- 2.22.0

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[libvirt] [PATCH 0/2] Couple of test_driver fixes
by Michal Privoznik 02 Jul '19

02 Jul '19

I was too eager to minimize patch 89320788ac4 and did some mistakes. Here are the fixes. Michal Prívozník (2): test_driver: Don't access @vm after it was set to NULL test_driver: Don't report VIR_DOMAIN_DISK_ERROR_NONE src/test/test_driver.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) -- 2.21.0

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[libvirt] [PATCH v2 8/9] docs: Deprecate CPU model runnability guarantees
by Eduardo Habkost 02 Jul '19

02 Jul '19

Document that CPU model runnability guarantees won't apply to unversioned CPU models anymore. Signed-off-by: Eduardo Habkost <ehabkost(a)redhat.com> --- Changes v1 -> v2: * (none) Cc: libvir-list(a)redhat.com --- qemu-deprecated.texi | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi index 9cba82d5ec..18f85f70e1 100644 --- a/qemu-deprecated.texi +++ b/qemu-deprecated.texi @@ -276,3 +276,22 @@ Note that if you are exposing the export via /dev/nbd0, it is easier to just export the entire image and then mount only /dev/nbd0p1 than it is to reinvoke @command{qemu-nbd -c /dev/nbd0} limited to just a subset of the image. + +@section Backwards compatibility + +@subsection Runnability guarantee of CPU models (since 4.1.0) + +Previous versions of QEMU never changed existing CPU models in +ways that introduced additional host software or hardware +requirements to the VM. This allowed management software to +safely change the machine type of an existing VM without +introducing new requirements ("runnability guarantee"). This +prevented CPU models from being updated to include CPU +vulnerability mitigations, leaving guests vulnerable in the +default configuration. + +The CPU model runnability guarantee won't apply anymore to +existing CPU models. Management software that needs runnability +guarantees must resolve the CPU model aliases using te +``alias-of'' field returned by the ``query-cpu-definitions'' QMP +command. -- 2.18.0.rc1.1.g3f1ff2140

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[libvirt] [PATCH] qemu: remove a redundant call from qemuDomainGetPerfEvents
by Ilias Stamatis 01 Jul '19

01 Jul '19

Calling virDomainObjUpdateModificationImpact directly inside the function body is redundant, since the same function call is embedded into virDomainObjGetOneDef. Signed-off-by: Ilias Stamatis <stamatis.iliass(a)gmail.com> --- src/qemu/qemu_driver.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index ef2e980216..6bfbc31c1c 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -10339,9 +10339,6 @@ qemuDomainGetPerfEvents(virDomainPtr dom, if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0) goto cleanup; - if (virDomainObjUpdateModificationImpact(vm, &flags) < 0) - goto endjob; - if (!(def = virDomainObjGetOneDef(vm, flags))) goto endjob; -- 2.22.0

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