On Thu, May 02, 2013 at 03:38:58PM +0100, Marc Zyngier wrote:
> diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
> index f7793df..9e2d906c 100644
> --- a/arch/arm/kvm/interrupts.S
> +++ b/arch/arm/kvm/interrupts.S
...
> -static void clear_pte_entry(pte_t *pte)
> +static void clear_pte_entry(struct kvm *kvm, pte_t *pte, phys_addr_t addr)
> {
> if (pte_present(*pte)) {
> kvm_set_pte(pte, __pte(0));
> put_page(virt_to_page(pte));
> + kvm_tlb_flush_vmid_ipa(kvm, addr);
> }
> }
...
> static void unmap_stage2_range(struct kvm *kvm, phys_addr_t start, u64 size)
> {
> - unmap_range(kvm->arch.pgd, start, size);
> + unmap_range(kvm, kvm->arch.pgd, start, size);
> }
>
> /**
> @@ -413,6 +425,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm)
> return;
>
> unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
> + kvm_tlb_flush_vmid_ipa(kvm, 0); /* Invalidate TLB ALL */
Do you still need this here if you invalidated each individual pte in
clear_pte_entry()? I think you can remove it from clear_pte_entry() and
just leave it here (more efficient probably) since you wouldn't free the
actual pages pointed at by the pte before unmapping.
> free_pages((unsigned long)kvm->arch.pgd, S2_PGD_ORDER);
> kvm->arch.pgd = NULL;
> }
> @@ -675,7 +688,6 @@ static void handle_hva_to_gpa(struct kvm *kvm,
> static void kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, void *data)
> {
> unmap_stage2_range(kvm, gpa, PAGE_SIZE);
> - kvm_tlb_flush_vmid_ipa(kvm, gpa);
Here you removed it relying on clear_pte_entry(), I think you could keep
it (see above).
--
Catalin
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