diff options
| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-11-18 19:08:09 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:25:08 -0500 |
| commit | 27f4fca29f9cfd740dcb7b2bc577bcfd02ae367d (patch) | |
| tree | a2fe80f8e961ddee2a9bd303ddd0c5ff1128eed3 /arch/x86 | |
| parent | 58356767107a6b02c9277810809aca8a36c473d7 (diff) | |
KVM: X86: Skip allocating pae_root for vcpu->arch.guest_mmu when !tdp_enabled
It is never used.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211118110814.2568-11-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ede63912b1ac..644a5cb4cad9 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5514,6 +5514,10 @@ static int __kvm_mmu_create(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu) for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++) mmu->prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID; + /* vcpu->arch.guest_mmu isn't used when !tdp_enabled. */ + if (!tdp_enabled && mmu == &vcpu->arch.guest_mmu) + return 0; + /* * When using PAE paging, the four PDPTEs are treated as 'root' pages, * while the PDP table is a per-vCPU construct that's allocated at MMU |