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powerpc/kvm/book3s: Add helper for host page table walk 

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200505071729.54912-13-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V 2020-05-05 12:47:19 +05:30 committed by Michael Ellerman
parent 6cdf30375f
commit 35528876a9
1 changed files with 16 additions and 0 deletions
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16
arch/powerpc/include/asm/kvm_book3s_64.h
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@ -647,6 +647,22 @@ static inline pte_t *find_kvm_secondary_pte(struct kvm *kvm, unsigned long ea,
return pte;
}
static inline pte_t *find_kvm_host_pte(struct kvm *kvm, unsigned long mmu_seq,
unsigned long ea, unsigned *hshift)
{
pte_t *pte;
VM_WARN(!spin_is_locked(&kvm->mmu_lock),
"%s called with kvm mmu_lock not held \n", __func__);
if (mmu_notifier_retry(kvm, mmu_seq))
return NULL;
pte = __find_linux_pte(kvm->mm->pgd, ea, NULL, hshift);
return pte;
}
extern pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid,
unsigned long ea, unsigned *hshift);