3:28 a.m.
Hi, all.
This patch adds Arm CCA support to QEMU driver for aarch64 system.
CCA is an abbreviation for Arm Confidential Compute Architecture
feature, it enhances the virtualization capabilities of
the platform by separating the management of resources from access
to those resources.
We are not yet at the stage where we can merge this patch as host
Linux/QEMU support is not yet merged, but I would like to receive
reviews and comments on the overall direction.
Changes in v3:
Supports two launch VM options: personalization-value and
measurement-log.
The measurement-log was added to allow us to check if the data
loaded into the guest RAM is a good image.
The Realm Personalization Value (RPV) was added to allow us to
distinguish between realms that have the same initial measurement
results.
This was added as a new Realm startup option in Linaro QEMU after
the v2 patch was posted. That's why we made this change.
[summary]
At this stage, all you can do is getting the CCA capability with
the virsh domcapabilities command and start the CCA VM with
the virsh create command.
capability info uses QEMU QMP to query QEMU options. The option
that exists now is for selecting a hash algorithm.
QEMU QMP sections currently only contains a single member, but
is wrapped in sections for expansion.
[Capability example]
Execution results of 'virsh domcapability" on QEMU
<domaincapabilities>
...
<features>
...
</sgx>
<cca supported='yes'>
<enum name='measurement-algo'>
<value>sha256</value>
<value>sha512</value>
</enum>
</cca>
<hyperv supported='yes'>
...
</features>
</domaincapabilities>
[XML example]
<domain>
...
<launchsecurity type='cca'>
<measurement-algo>sha256</measurement-algo>
</launchsecurity>
...
</domain>
[limitations/tests]
To obtain capability info, it is necessary to support the QEMU QMP
command, which QEMU does not yet support. We added a QMP
command to retrieve CCA info for test (See "[software version]"
below). I need to check qemu_firmware.c to see if my CPU firmware
supports CCA. Since it's not implemented yet, I'll wait until a Linux
distributor provides me with a JSON file for CCA.
We have confirmed that the added tests (qemucapabilitiestest,
domaincapstest and qemuxmlconftest) and the CCA VM startup test
(starting the CCA VM from the virsh create command) passed.
The "personalization-value" and "measurement-log" parameters that
exist in the current Linaro QEMU cca/latest branch will not be
specified as CCA VM startup parameters with the virsh create
command.
[software version]
I followed the steps in Linaro's blog below.
https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/Building+...
The QEMU used was enhanced with CCA QMP command and found at:
https://github.com/Kazuhiro-Abe-fj/linaro_qemu/tree/cca-latest-qmp
which is based on Linaro QEMU (cca/latest)
https://git.codelinaro.org/linaro/dcap/qemu/-/tree/cca/latest?ref_type=heads
RFC v1:
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/V4...
RFC v2:
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/message/5...
Signed-off-by: Kazuhiro Abe <fj1078ii(a)aa.jp.fujitsu.com>
Akio Kakuno (6):
src: Add ARM CCA support in qemu driver to launch VM
src: Add ARM CCA support in domain capabilities command
src: Add ARM CCA support in domain schema
qemucapabilitiestest: Adds Arm CCA support
domaincapstest: Adds Arm CCA support
qemuxmlconftest: Adds Arm CCA support
docs/formatdomain.rst | 43 +
docs/formatdomaincaps.rst | 27 +-
src/conf/domain_capabilities.c | 48 +
src/conf/domain_capabilities.h | 12 +
src/conf/domain_conf.c | 25 +
src/conf/domain_conf.h | 9 +
src/conf/domain_validate.c | 1 +
src/conf/schemas/domaincaps.rng | 36 +
src/conf/schemas/domaincommon.rng | 26 +
src/conf/virconftypes.h | 2 +
src/libvirt_private.syms | 1 +
src/qemu/qemu_capabilities.c | 145 +
src/qemu/qemu_capabilities.h | 4 +
src/qemu/qemu_cgroup.c | 2 +
src/qemu/qemu_command.c | 29 +
src/qemu/qemu_driver.c | 2 +
src/qemu/qemu_firmware.c | 1 +
src/qemu/qemu_monitor.c | 10 +
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 98 +
src/qemu/qemu_monitor_json.h | 4 +
src/qemu/qemu_namespace.c | 2 +
src/qemu/qemu_process.c | 4 +
src/qemu/qemu_validate.c | 4 +
src/security/security_dac.c | 2 +
.../qemu_9.1.0-virt.aarch64.xml | 244 +
tests/domaincapsdata/qemu_9.1.0.aarch64.xml | 244 +
.../caps_9.1.0_aarch64.replies | 36222 ++++++++++++++++
.../caps_9.1.0_aarch64.xml | 530 +
.../launch-security-cca.aarch64-latest.args | 30 +
.../launch-security-cca.aarch64-latest.xml | 24 +
tests/qemuxmlconfdata/launch-security-cca.xml | 16 +
tests/qemuxmlconftest.c | 2 +
33 files changed, 37851 insertions(+), 1 deletion(-)
create mode 100644 tests/domaincapsdata/qemu_9.1.0-virt.aarch64.xml
create mode 100644 tests/domaincapsdata/qemu_9.1.0.aarch64.xml
create mode 100644 tests/qemucapabilitiesdata/caps_9.1.0_aarch64.replies
create mode 100644 tests/qemucapabilitiesdata/caps_9.1.0_aarch64.xml
create mode 100644 tests/qemuxmlconfdata/launch-security-cca.aarch64-latest.args
create mode 100644 tests/qemuxmlconfdata/launch-security-cca.aarch64-latest.xml
create mode 100644 tests/qemuxmlconfdata/launch-security-cca.xml
--
2.43.5