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[PATCH v5 00/17] i386: KVM: expand Hyper-V features early and provide si
From: |
Vitaly Kuznetsov |
Subject: |
[PATCH v5 00/17] i386: KVM: expand Hyper-V features early and provide simple 'hv-default=on' option |
Date: |
Mon, 1 Mar 2021 14:50:46 +0100 |
Changes since v4:
- Temporary drop 'hv-evmcs' from the 'hv-default' set as handling it
properly requires custom options parsers (we need to e.g distinguish
between 'hv-default,-vmx' and 'hv-default,hv-evmcs,-vmx') but custom
parsers are called evil. I'm not giving up on the idea, I just want
to get things moving here. I'll be sending patches to add 'hv-evmcs'
back separately.
- Patch to support 'hv-passthrough,hv-feature=off' is also dropped
for now, we'll get back to it later (with either custom option
parsers or 'scratch CPUs' depending on 'hv-evmcs' discussion
outcome).
- Null-terminate hv-vendor string in 'hv-passthrough' mode (bug in
PATCH1).
Original description:
Upper layer tools like libvirt want to figure out which Hyper-V features are
supported by the underlying stack (QEMU/KVM) but currently they are unable to
do so. We have a nice 'hv_passthrough' CPU flag supported by QEMU but it has
no effect on e.g. QMP's
query-cpu-model-expansion type=full
model={"name":"host","props":{"hv-passthrough":true}}
command as we parse Hyper-V features after creating KVM vCPUs and not at
feature expansion time. To support the use-case we first need to make
KVM_GET_SUPPORTED_HV_CPUID ioctl a system-wide ioctl as the existing
vCPU version can't be used that early. This is what KVM part does. With
that done, we can make early Hyper-V feature expansion (this series).
In addition, provide a simple 'hv-default' option which enables (and
requires from KVM) all currently supported Hyper-V enlightenments except
for 'hv-evmcs' (for now). Unlike 'hv-passthrough' mode, this is going to be
migratable.
Vitaly Kuznetsov (17):
i386: keep hyperv_vendor string up-to-date
i386: invert hyperv_spinlock_attempts setting logic with
hv_passthrough
i386: always fill Hyper-V CPUID feature leaves from X86CPU data
i386: stop using env->features[] for filling Hyper-V CPUIDs
i386: introduce hyperv_feature_supported()
i386: introduce hv_cpuid_get_host()
i386: drop FEAT_HYPERV feature leaves
i386: introduce hv_cpuid_cache
i386: split hyperv_handle_properties() into
hyperv_expand_features()/hyperv_fill_cpuids()
i386: move eVMCS enablement to hyperv_init_vcpu()
i386: switch hyperv_expand_features() to using error_setg()
i386: adjust the expected KVM_GET_SUPPORTED_HV_CPUID array size
i386: prefer system KVM_GET_SUPPORTED_HV_CPUID ioctl over vCPU's one
i386: use global kvm_state in hyperv_enabled() check
i386: expand Hyper-V features during CPU feature expansion time
i386: provide simple 'hv-default=on' option
qtest/hyperv: Introduce a simple hyper-v test
MAINTAINERS | 1 +
docs/hyperv.txt | 18 +-
target/i386/cpu.c | 163 +++++-------
target/i386/cpu.h | 9 +-
target/i386/kvm/kvm-stub.c | 5 +
target/i386/kvm/kvm.c | 517 ++++++++++++++++++++-----------------
target/i386/kvm/kvm_i386.h | 1 +
tests/qtest/hyperv-test.c | 270 +++++++++++++++++++
tests/qtest/meson.build | 3 +-
9 files changed, 645 insertions(+), 342 deletions(-)
create mode 100644 tests/qtest/hyperv-test.c
--
2.29.2
- [PATCH v5 00/17] i386: KVM: expand Hyper-V features early and provide simple 'hv-default=on' option,
Vitaly Kuznetsov <=
- [PATCH v5 01/17] i386: keep hyperv_vendor string up-to-date, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 02/17] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 03/17] i386: always fill Hyper-V CPUID feature leaves from X86CPU data, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 04/17] i386: stop using env->features[] for filling Hyper-V CPUIDs, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 05/17] i386: introduce hyperv_feature_supported(), Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 06/17] i386: introduce hv_cpuid_get_host(), Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 07/17] i386: drop FEAT_HYPERV feature leaves, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 09/17] i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids(), Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 08/17] i386: introduce hv_cpuid_cache, Vitaly Kuznetsov, 2021/03/01
- [PATCH v5 10/17] i386: move eVMCS enablement to hyperv_init_vcpu(), Vitaly Kuznetsov, 2021/03/01