Commit bff01cb6 authored by Quentin Perret's avatar Quentin Perret Committed by Marc Zyngier
Browse files

KVM: arm64: pkvm: Stub io map functions 



Now that GICv2 is disabled in nVHE protected mode there should be no
other reason for the host to use create_hyp_io_mappings() or
kvm_phys_addr_ioremap(). Add sanity checks to make sure that assumption
remains true looking forward.

Signed-off-by: default avatarQuentin Perret <qperret@google.com>
Acked-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211208152300.2478542-6-qperret@google.com
parent 473a3efb

arch/arm64/kvm/mmu.c

+6 −0
Original line number Diff line number Diff line
@@ -407,6 +407,9 @@ int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size, 
	unsigned long addr;

	int ret;



	if (is_protected_kvm_enabled())

		return -EPERM;



	*kaddr = ioremap(phys_addr, size);

	if (!*kaddr)

		return -ENOMEM;
@@ -650,6 +653,9 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, 
				     KVM_PGTABLE_PROT_R |

				     (writable ? KVM_PGTABLE_PROT_W : 0);



	if (is_protected_kvm_enabled())

		return -EPERM;



	size += offset_in_page(guest_ipa);

	guest_ipa &= PAGE_MASK;