On 04/20/2017 08:19 AM, Ján Tomko wrote:
Add a new attribute to control the caching mode.
https://bugzilla.redhat.com/show_bug.cgi?id=1427005 --- docs/formatdomain.html.in | 9 +++++++ docs/schemas/domaincommon.rng | 5 ++++ src/conf/domain_conf.c | 24 ++++++++++++++++--- src/conf/domain_conf.h | 1 + .../qemuxml2argv-intel-iommu-caching.xml | 28 ++++++++++++++++++++++ .../qemuxml2xmlout-intel-iommu-caching.xml | 1 + tests/qemuxml2xmltest.c | 1 + 7 files changed, 66 insertions(+), 3 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-caching.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index f5a8e76..dbca316 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -7364,6 +7364,15 @@ qemu-kvm -net nic,model=? /dev/null (QEMU only) </p> </dd> + <dt><code>caching</code></dt> + <dd> + <p> + The <code>caching</code> attribute with possible values + <code>on</code> and <code>off</code> can be used to + turn on the caching mode. <span class="since">Since 3.3.0</span> + (QEMU only)
Useful for what? Required for what? A bit more description about the relationship with intremap might be nice as well. Is there a relationship with the irqmode settings? If so, then I would think there should be checks in domain post processing that ensure that if this is on, then the irqmode setting is adjusted appropriately.
+ </p> + </dd> </dl> </dd> </dl>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml new file mode 100644 index 0000000..bab4fcb --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml @@ -0,0 +1,28 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <currentMemory unit='KiB'>219100</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='q35'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <controller type='pci' index='0' model='pcie-root'/> + <controller type='sata' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> + </controller> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + <iommu model='intel'> + <driver intremap='on' caching='on'/> + </iommu> + </devices> +</domain>
Maybe this is the XML that gets more devices added that prove the ordering is correct. IDC which one, but we should "ensure" the ordering is right.. John