KVM: X86: correct meaningless kvm_apicv_activated() check

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After test_and_set_bit() for kvm->arch.apicv_inhibit_reasons, we will
always get false when calling kvm_apicv_activated() because it's sure
apicv_inhibit_reasons do not equal to 0.

What the code wants to do, is check whether APICv was *already* active
and if so skip the costly request; we can do this using cmpxchg.

Reported-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2020-03-14 12:29:23 +01:00

parent 212617dbb6

commit 8e205a6b2a

1 changed files with 16 additions and 9 deletions

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arch/x86/kvm/x86.c

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