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KVM: RISC-V: Unmap stage2 mapping when deleting/moving a memslot

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Unmap stage2 page tables when a memslot is being deleted or moved.  It's
the architectures' responsibility to ensure existing mappings are removed
when kvm_arch_flush_shadow_memslot() returns.

Fixes: 9d05c1fee8 ("RISC-V: KVM: Implement stage2 page table programming")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Sean Christopherson 2021-11-04 16:41:06 +00:00 committed by Anup Patel
parent 1360572566
commit 756e1fc165
1 changed files with 6 additions and 0 deletions
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6
arch/riscv/kvm/mmu.c
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@ -453,6 +453,12 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm)
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot)
{
gpa_t gpa = slot->base_gfn << PAGE_SHIFT;
phys_addr_t size = slot->npages << PAGE_SHIFT;
spin_lock(&kvm->mmu_lock);
stage2_unmap_range(kvm, gpa, size, false);
spin_unlock(&kvm->mmu_lock);
}
void kvm_arch_commit_memory_region(struct kvm *kvm,