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| author | Wanpeng Li <wanpeng.li@hotmail.com> | 2015-09-16 17:30:05 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-14 16:41:09 +0200 |
| commit | 991e7a0eedf12721f5561d7a1a54d248dc290bc0 (patch) | |
| tree | 0b9241cd176d9f09ab3b1de3dfd467996dc45891 | |
| parent | 6003a4201077da41427dae5e71bb2f31dfdc0c10 (diff) | |
| download | linux-stable-991e7a0eedf12721f5561d7a1a54d248dc290bc0.tar.gz linux-stable-991e7a0eedf12721f5561d7a1a54d248dc290bc0.tar.bz2 linux-stable-991e7a0eedf12721f5561d7a1a54d248dc290bc0.zip | |
KVM: VMX: adjust interface to allocate/free_vpid
Adjust allocate/free_vid so that they can be reused for the nested vpid.
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8eeba6ac5914..1452271e98ae 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4268,29 +4268,28 @@ static int alloc_identity_pagetable(struct kvm *kvm) return r; } -static void allocate_vpid(struct vcpu_vmx *vmx) +static int allocate_vpid(void) { int vpid; - vmx->vpid = 0; if (!enable_vpid) - return; + return 0; spin_lock(&vmx_vpid_lock); vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); - if (vpid < VMX_NR_VPIDS) { - vmx->vpid = vpid; + if (vpid < VMX_NR_VPIDS) __set_bit(vpid, vmx_vpid_bitmap); - } + else + vpid = 0; spin_unlock(&vmx_vpid_lock); + return vpid; } -static void free_vpid(struct vcpu_vmx *vmx) +static void free_vpid(int vpid) { - if (!enable_vpid) + if (!enable_vpid || vpid == 0) return; spin_lock(&vmx_vpid_lock); - if (vmx->vpid != 0) - __clear_bit(vmx->vpid, vmx_vpid_bitmap); + __clear_bit(vpid, vmx_vpid_bitmap); spin_unlock(&vmx_vpid_lock); } @@ -8629,7 +8628,7 @@ static void vmx_free_vcpu(struct kvm_vcpu *vcpu) if (enable_pml) vmx_disable_pml(vmx); - free_vpid(vmx); + free_vpid(vmx->vpid); leave_guest_mode(vcpu); vmx_load_vmcs01(vcpu); free_nested(vmx); @@ -8648,7 +8647,7 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) if (!vmx) return ERR_PTR(-ENOMEM); - allocate_vpid(vmx); + vmx->vpid = allocate_vpid(); err = kvm_vcpu_init(&vmx->vcpu, kvm, id); if (err) @@ -8724,7 +8723,7 @@ free_msrs: uninit_vcpu: kvm_vcpu_uninit(&vmx->vcpu); free_vcpu: - free_vpid(vmx); + free_vpid(vmx->vpid); kmem_cache_free(kvm_vcpu_cache, vmx); return ERR_PTR(err); } |