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| author |   Nadav Amit <namit@cs.technion.ac.il> | 2015-04-02 03:10:36 +0300 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2015-04-08 10:47:02 +0200 |
| commit | 58d269d8cccc53643f1a0900cfc0940e85ec9691 (patch) | |
| tree | d8154df29de173aa1efa6192077854b4084fccb5 /include/linux/kvm_host.h | |
| parent | KVM: x86: simplify kvm_apic_map (diff) | |
| download | linux-dev-58d269d8cccc53643f1a0900cfc0940e85ec9691.tar.xz linux-dev-58d269d8cccc53643f1a0900cfc0940e85ec9691.zip | |
KVM: x86: BSP in MSR_IA32_APICBASE is writable
After reset, the CPU can change the BSP, which will be used upon INIT. Reset
should return the BSP which QEMU asked for, and therefore handled accordingly.
To quote: "If the MP protocol has completed and a BSP is chosen, subsequent
INITs (either to a specific processor or system wide) do not cause the MP
protocol to be repeated."
[Intel SDM 8.4.2: MP Initialization Protocol Requirements and Restrictions]
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427933438-12782-3-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/kvm_host.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 27bd53b69080..82af5d0b996e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -982,11 +982,16 @@ static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) #endif /* CONFIG_HAVE_KVM_EVENTFD */ #ifdef CONFIG_KVM_APIC_ARCHITECTURE -static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) +static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) { return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; } +static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) +{ + return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; +} + bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); #else |