[PATCH 20/45] KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path

Sean Christopherson
2019-10-22T01:59:00Z

x86 does not load its MMU until KVM_RUN, which cannot be invoked until
after vCPU creation succeeds. Given that kvm_arch_vcpu_destroy() is
called if and only if vCPU creation fails, it is impossible for the MMU
to be loaded.

Note, the bogus kvm_mmu_unload() call was added during an unrelated
refactoring of vCPU allocation, i.e. was presumably added as an
opportunstic "fix" for a perceived leak.

Fixes: fb3f0f51d92d1 ("KVM: Dynamically allocate vcpus")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kvm/x86.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3a6d8c4a9758..dd667df37d63 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9099,10 +9099,6 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
vcpu->arch.apf.msr_val = 0;

- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-
kvm_arch_vcpu_free(vcpu);
}

--
2.22.0