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FROMLIST: KVM: arm64: pkvm: Stub io map functions

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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 <qperret@google.com>
Link: https://lore.kernel.org/r/20211208152300.2478542-6-qperret@google.com
Bug: 209580772
Change-Id: I371533976ce9ffdbf6b0eff986680d34d3153b86
This commit is contained in:
Quentin Perret
2021-12-08 15:22:58 +00:00
parent f8b4f2d6cd
commit 396a43c5bd
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/kvm/mmu.c
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@@ -525,6 +525,9 @@ 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;
@@ -768,6 +771,9 @@ 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;