[PATCH 5/6] KVM: arm64: pkvm: Stub io map functions
From: Quentin Perret <hidden>
Date: 2021-12-08 15:23:27
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
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: Quentin Perret <redacted> --- arch/arm64/kvm/mmu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 326cdfec74a1..605c104eb030 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c@@ -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;
--
2.34.1.400.ga245620fadb-goog
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