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[v2,20/45] KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path

Message ID 20191218215530.2280-21-sean.j.christopherson@intel.com (mailing list archive)
State New, archived
Headers show
Series KVM: Refactor vCPU creation | expand

Commit Message

Sean Christopherson Dec. 18, 2019, 9:55 p.m. UTC 
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(-)
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Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8973037eb2fa..19c14b786255 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9178,10 +9178,6 @@  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);
 }