Commit 35528876 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

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



Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200505071729.54912-13-aneesh.kumar@linux.ibm.com
parent 6cdf3037

arch/powerpc/include/asm/kvm_book3s_64.h

+16 −0
Original line number Diff line number Diff line
@@ -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);