Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU

[PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 01/44] KVM: Register /dev/kvm as the _very_ last thing during initialization · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 02/44] KVM: Initialize IRQ FD after arch hardware setup · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 02/44] KVM: Initialize IRQ FD after arch hardware setup · Chao Gao <hidden> · 2022-11-04
Re: [PATCH 02/44] KVM: Initialize IRQ FD after arch hardware setup · Sean Christopherson <seanjc@google.com> · 2022-11-04
[PATCH 03/44] KVM: Allocate cpus_hardware_enabled after arch hardware setup · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 03/44] KVM: Allocate cpus_hardware_enabled after arch hardware setup · Yuan Yao <hidden> · 2022-11-04
[PATCH 05/44] KVM: s390: Unwind kvm_arch_init() piece-by-piece() if a step fails · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 05/44] KVM: s390: Unwind kvm_arch_init() piece-by-piece() if a step fails · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 04/44] KVM: Teardown VFIO ops earlier in kvm_exit() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 04/44] KVM: Teardown VFIO ops earlier in kvm_exit() · Cornelia Huck <cohuck@redhat.com> · 2022-11-03
Re: [PATCH 04/44] KVM: Teardown VFIO ops earlier in kvm_exit() · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 06/44] KVM: s390: Move hardware setup/unsetup to init/exit · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 06/44] KVM: s390: Move hardware setup/unsetup to init/exit · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Vitaly Kuznetsov <vkuznets@redhat.com> · 2022-11-03
Re: [PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Sean Christopherson <seanjc@google.com> · 2022-11-11
Re: [PATCH 10/44] KVM: VMX: Clean up eVMCS enabling if KVM initialization fails · Vitaly Kuznetsov <vkuznets@redhat.com> · 2022-11-15
[PATCH 07/44] KVM: x86: Do timer initialization after XCR0 configuration · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 08/44] KVM: x86: Move hardware setup/unsetup to init/exit · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 08/44] KVM: x86: Move hardware setup/unsetup to init/exit · Yuan Yao <hidden> · 2022-11-04
Re: [PATCH 08/44] KVM: x86: Move hardware setup/unsetup to init/exit · Sean Christopherson <seanjc@google.com> · 2022-11-04
[PATCH 11/44] KVM: x86: Move guts of kvm_arch_init() to standalone helper · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 09/44] KVM: Drop arch hardware (un)setup hooks · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 09/44] KVM: Drop arch hardware (un)setup hooks · Anup Patel <anup@brainfault.org> · 2022-11-07
Re: [PATCH 09/44] KVM: Drop arch hardware (un)setup hooks · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 12/44] KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 13/44] KVM: x86: Serialize vendor module initialization (hardware setup) · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 13/44] KVM: x86: Serialize vendor module initialization (hardware setup) · Huang, Kai <hidden> · 2022-11-16
Re: [PATCH 13/44] KVM: x86: Serialize vendor module initialization (hardware setup) · Sean Christopherson <seanjc@google.com> · 2022-11-16
[PATCH 17/44] KVM: arm64: Do arm/arch initialiation without bouncing through kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 17/44] KVM: arm64: Do arm/arch initialiation without bouncing through kvm_init() · Philippe Mathieu-Daudé <hidden> · 2022-11-03
Re: [PATCH 17/44] KVM: arm64: Do arm/arch initialiation without bouncing through kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-03
[PATCH 14/44] KVM: arm64: Simplify the CPUHP logic · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 21/44] KVM: MIPS: Register die notifier prior to kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 21/44] KVM: MIPS: Register die notifier prior to kvm_init() · Philippe Mathieu-Daudé <hidden> · 2022-11-03
[PATCH 15/44] KVM: arm64: Free hypervisor allocations if vector slot init fails · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 16/44] KVM: arm64: Unregister perf callbacks if hypervisor finalization fails · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm_init() · Philippe Mathieu-Daudé <hidden> · 2022-11-03
Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm_init() · Claudio Imbrenda <imbrenda@linux.ibm.com> · 2022-11-03
Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm_init() · Claudio Imbrenda <imbrenda@linux.ibm.com> · 2022-11-03
Re: [PATCH 25/44] KVM: s390: Do s390 specific init without bouncing through kvm_init() · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 26/44] KVM: s390: Mark __kvm_s390_init() and its descendants as __init · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 26/44] KVM: s390: Mark __kvm_s390_init() and its descendants as __init · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 18/44] KVM: arm64: Mark kvm_arm_init() and its unique descendants as __init · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 19/44] KVM: MIPS: Hardcode callbacks to hardware virtualization extensions · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 20/44] KVM: MIPS: Setup VZ emulation? directly from kvm_mips_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 20/44] KVM: MIPS: Setup VZ emulation? directly from kvm_mips_init() · Philippe Mathieu-Daudé <hidden> · 2022-11-03
[PATCH 32/44] KVM: x86: Unify pr_fmt to use module name for all KVM modules · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 32/44] KVM: x86: Unify pr_fmt to use module name for all KVM modules · Robert Hoo <hidden> · 2022-11-10
Re: [PATCH 32/44] KVM: x86: Unify pr_fmt to use module name for all KVM modules · Sean Christopherson <seanjc@google.com> · 2022-11-10
Re: [PATCH 32/44] KVM: x86: Unify pr_fmt to use module name for all KVM modules · Sean Christopherson <seanjc@google.com> · 2022-11-30
Re: [PATCH 32/44] KVM: x86: Unify pr_fmt to use module name for all KVM modules · Robert Hoo <hidden> · 2022-12-01
[PATCH 24/44] KVM: PPC: Move processor compatibility check to module init · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 23/44] KVM: RISC-V: Tag init functions and data with __init, __ro_after_init · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 23/44] KVM: RISC-V: Tag init functions and data with __init, __ro_after_init · Anup Patel <anup@brainfault.org> · 2022-11-07
[PATCH 22/44] KVM: RISC-V: Do arch init directly in riscv_kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 22/44] KVM: RISC-V: Do arch init directly in riscv_kvm_init() · Philippe Mathieu-Daudé <hidden> · 2022-11-03
Re: [PATCH 22/44] KVM: RISC-V: Do arch init directly in riscv_kvm_init() · Anup Patel <anup@brainfault.org> · 2022-11-07
[PATCH 27/44] KVM: Drop kvm_arch_{init,exit}() hooks · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 27/44] KVM: Drop kvm_arch_{init,exit}() hooks · Philippe Mathieu-Daudé <hidden> · 2022-11-03
Re: [PATCH 27/44] KVM: Drop kvm_arch_{init,exit}() hooks · Anup Patel <anup@brainfault.org> · 2022-11-07
Re: [PATCH 27/44] KVM: Drop kvm_arch_{init,exit}() hooks · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 28/44] KVM: VMX: Make VMCS configuration/capabilities structs read-only after init · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 29/44] KVM: x86: Do CPU compatibility checks in x86 code · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 30/44] KVM: Drop kvm_arch_check_processor_compat() hook · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 30/44] KVM: Drop kvm_arch_check_processor_compat() hook · Philippe Mathieu-Daudé <hidden> · 2022-11-03
Re: [PATCH 30/44] KVM: Drop kvm_arch_check_processor_compat() hook · Anup Patel <anup@brainfault.org> · 2022-11-07
Re: [PATCH 30/44] KVM: Drop kvm_arch_check_processor_compat() hook · Eric Farman <farman@linux.ibm.com> · 2022-11-07
[PATCH 31/44] KVM: x86: Use KBUILD_MODNAME to specify vendor module name · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Sean Christopherson <seanjc@google.com> · 2022-11-03
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Sean Christopherson <seanjc@google.com> · 2022-11-03
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-04
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Sean Christopherson <seanjc@google.com> · 2022-11-04
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Huang, Kai <hidden> · 2022-11-15
Re: [PATCH 33/44] KVM: x86: Do VMX/SVM support checks directly in vendor code · Sean Christopherson <seanjc@google.com> · 2022-11-16
[PATCH 34/44] KVM: VMX: Shuffle support checks and hardware enabling code around · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 35/44] KVM: SVM: Check for SVM support in CPU compatibility checks · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 43/44] KVM: Register syscore (suspend/resume) ops early in kvm_init() · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 37/44] KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 37/44] KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section · Robert Hoo <hidden> · 2022-11-10
Re: [PATCH 37/44] KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section · Sean Christopherson <seanjc@google.com> · 2022-11-10
[PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Sean Christopherson <seanjc@google.com> · 2022-11-03
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Isaku Yamahata <hidden> · 2022-11-03
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Sean Christopherson <seanjc@google.com> · 2022-11-03
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Isaku Yamahata <hidden> · 2022-11-04
Re: [PATCH 36/44] KVM: x86: Do compatibility checks when onlining CPU · Sean Christopherson <seanjc@google.com> · 2022-11-11
[PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-10
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-10
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-10
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-10
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-10
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-15
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-15
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-16
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-16
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Huang, Kai <hidden> · 2022-11-17
Re: [PATCH 38/44] KVM: Disable CPU hotplug during hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-17
[PATCH 39/44] KVM: Drop kvm_count_lock and instead protect kvm_usage_count with kvm_lock · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 39/44] KVM: Drop kvm_count_lock and instead protect kvm_usage_count with kvm_lock · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 39/44] KVM: Drop kvm_count_lock and instead protect kvm_usage_count with kvm_lock · Sean Christopherson <seanjc@google.com> · 2022-11-03
[PATCH 40/44] KVM: Remove on_each_cpu(hardware_disable_nolock) in kvm_exit() · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 41/44] KVM: Use a per-CPU variable to track which CPUs have enabled virtualization · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 42/44] KVM: Make hardware_enable_failed a local variable in the "enable all" path · Sean Christopherson <seanjc@google.com> · 2022-11-02
[PATCH 44/44] KVM: Opt out of generic hardware enabling on s390 and PPC · Sean Christopherson <seanjc@google.com> · 2022-11-02
Re: [PATCH 44/44] KVM: Opt out of generic hardware enabling on s390 and PPC · Anup Patel <anup@brainfault.org> · 2022-11-07
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Christian Borntraeger <borntraeger@linux.ibm.com> · 2022-11-03
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-03
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Isaku Yamahata <hidden> · 2022-11-04
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Paolo Bonzini <pbonzini@redhat.com> · 2022-11-04
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-04
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Isaku Yamahata <hidden> · 2022-11-07
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Huang, Kai <hidden> · 2022-11-08
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Isaku Yamahata <hidden> · 2022-11-08
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Huang, Kai <hidden> · 2022-11-08
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Huang, Kai <hidden> · 2022-11-08
Re: [PATCH 00/44] KVM: Rework kvm_init() and hardware enabling · Sean Christopherson <seanjc@google.com> · 2022-11-08

From: Paolo Bonzini <pbonzini@redhat.com>
Date: 2022-11-03 15:18:49
Also in: kvm, kvm-riscv, kvmarm, linux-mips, linux-riscv, linux-s390, linuxppc-dev, lkml

On 11/3/22 00:19, Sean Christopherson wrote:

From: Chao Gao<redacted>

Do compatibility checks when enabling hardware to effectively add
compatibility checks when onlining a CPU.  Abort enabling, i.e. the
online process, if the (hotplugged) CPU is incompatible with the known
good setup.

This paragraph is not true with this patch being before "KVM: Rename and 
move CPUHP_AP_KVM_STARTING to ONLINE section".

Paolo


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