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| author | Sean Christopherson <seanjc@google.com> | 2021-07-13 09:32:54 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 11:01:52 -0400 |
| commit | f0428b3dcb2d7efe4b2a2304841645b48f0b6499 (patch) | |
| tree | 85b91cde8649a5bd067cce9c8e2dbd656e35a38e /tools/perf/scripts/python | |
| parent | KVM: x86: Set BSP bit in reset BSP vCPU's APIC base by default (diff) | |
| download | linux-f0428b3dcb2d7efe4b2a2304841645b48f0b6499.tar.gz linux-f0428b3dcb2d7efe4b2a2304841645b48f0b6499.zip | |
KVM: VMX: Stuff vcpu->arch.apic_base directly at vCPU RESET
Write vcpu->arch.apic_base directly instead of bouncing through
kvm_set_apic_base(). This is a glorified nop, and is a step towards
cleaning up the mess that is local APIC creation.
When using an in-kernel APIC, kvm_create_lapic() explicitly sets
vcpu->arch.apic_base to MSR_IA32_APICBASE_ENABLE to avoid its own
kvm_lapic_set_base() call in kvm_lapic_reset() from triggering state
changes. That call during RESET exists purely to set apic->base_address
to the default base value. As a result, by the time VMX gets control,
the only missing piece is the BSP bit being set for the reset BSP.
For a userspace APIC, there are no side effects to process (for the APIC).
In both cases, the call to kvm_update_cpuid_runtime() is a nop because
the vCPU hasn't yet been exposed to userspace, i.e. there can't be any
CPUID entries.
No functional change intended.
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-17-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions