[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH RFC v3 00/23] i386: KVM: expand Hyper-V features early
From: |
Vitaly Kuznetsov |
Subject: |
[PATCH RFC v3 00/23] i386: KVM: expand Hyper-V features early |
Date: |
Fri, 9 Oct 2020 14:18:19 +0200 |
Another week another RFC. KVM patches are still in flight, so RFC again.
Changes since RFCv2:
- Rebase.
- Split "i386: drop FEAT_HYPERV feature leaves" into several patches and
re-shuffle patches to minimize the code churn and make it easier to
review. [Eduardo]
- Added "i386: provide simple 'hyperv=on' option to x86 machine types" on
top.
This pairs with
https://lore.kernel.org/kvm/20200929150944.1235688-1-vkuznets@redhat.com/T/#t
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, add a simple 'hyperv=on' option to x86 machine types which
enables (and requires from KVM) all currently supported Hyper-V enlightenments.
Unlike 'hv_passthrough' mode, this is going to be migratable.
Vitaly Kuznetsov (23):
WIP: update linux/headers
i386: fill in FEAT_HYPERV_EDX from edx instead of eax
i386: drop x86_cpu_get_supported_feature_word() forward declaration
i386: move hyperv_vendor_id initialization to x86_cpu_realizefn()
i386: move hyperv_interface_id initialization to x86_cpu_realizefn()
i386: move hyperv_version_id initialization to x86_cpu_realizefn()
i386: move hyperv_limits initialization to x86_cpu_realizefn()
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 'hyperv=on' option to x86 machine types
docs/hyperv.txt | 8 +
hw/i386/x86.c | 30 ++
include/hw/i386/x86.h | 7 +
linux-headers/asm-x86/kvm.h | 20 ++
linux-headers/linux/kvm.h | 27 +-
target/i386/cpu.c | 149 ++++------
target/i386/cpu.h | 12 +-
target/i386/kvm-stub.c | 5 +
target/i386/kvm.c | 526 ++++++++++++++++++++----------------
target/i386/kvm_i386.h | 1 +
10 files changed, 457 insertions(+), 328 deletions(-)
--
2.25.4
- [PATCH RFC v3 00/23] i386: KVM: expand Hyper-V features early,
Vitaly Kuznetsov <=
- [PATCH RFC v3 01/23] WIP: update linux/headers, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 02/23] i386: fill in FEAT_HYPERV_EDX from edx instead of eax, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 03/23] i386: drop x86_cpu_get_supported_feature_word() forward declaration, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 04/23] i386: move hyperv_vendor_id initialization to x86_cpu_realizefn(), Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 08/23] i386: keep hyperv_vendor string up-to-date, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 10/23] i386: always fill Hyper-V CPUID feature leaves from X86CPU data, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 09/23] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough, Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 05/23] i386: move hyperv_interface_id initialization to x86_cpu_realizefn(), Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 06/23] i386: move hyperv_version_id initialization to x86_cpu_realizefn(), Vitaly Kuznetsov, 2020/10/09
- [PATCH RFC v3 07/23] i386: move hyperv_limits initialization to x86_cpu_realizefn(), Vitaly Kuznetsov, 2020/10/09