diff options
Diffstat (limited to 'arch/x86/kvm/mmu/tdp_mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 1491e2f7a897..5158d02b8925 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -7,7 +7,10 @@ #include "tdp_mmu.h" #include "spte.h" +#ifdef CONFIG_X86_64 static bool __read_mostly tdp_mmu_enabled = false; +module_param_named(tdp_mmu, tdp_mmu_enabled, bool, 0644); +#endif static bool is_tdp_mmu_enabled(void) { @@ -1128,3 +1131,21 @@ bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, return spte_set; } +/* + * Return the level of the lowest level SPTE added to sptes. + * That SPTE may be non-present. + */ +int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes) +{ + struct tdp_iter iter; + struct kvm_mmu *mmu = vcpu->arch.mmu; + int leaf = vcpu->arch.mmu->shadow_root_level; + gfn_t gfn = addr >> PAGE_SHIFT; + + tdp_mmu_for_each_pte(iter, mmu, gfn, gfn + 1) { + leaf = iter.level; + sptes[leaf - 1] = iter.old_spte; + } + + return leaf; +} |