[20/45] KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path
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Message ID 20191022015925.31916-21-sean.j.christopherson@intel.com
State Not Applicable
Headers show
Series
  • KVM: Refactor vCPU creation
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Commit Message

Sean Christopherson Oct. 22, 2019, 1:59 a.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(-)

Patch
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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);
 }