From f0f825f0e20abe9ba6eb71b7c1eebd891fb4375c Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Mon, 8 Oct 2018 16:31:02 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Use kvmppc_unmap_pte() in kvm_unmap_radix() kvmppc_unmap_pte() does a sequence of operations that are open-coded in kvm_unmap_radix(). This extends kvmppc_unmap_pte() a little so that it can be used by kvm_unmap_radix(), and makes kvm_unmap_radix() call it. Reviewed-by: David Gibson Signed-off-by: Paul Mackerras Signed-off-by: Michael Ellerman --- arch/powerpc/kvm/book3s_64_mmu_radix.c | 33 ++++++++++---------------- 1 file changed, 13 insertions(+), 20 deletions(-) diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index 47f2b1855593..bd06a955d190 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -240,19 +240,22 @@ static void kvmppc_pmd_free(pmd_t *pmdp) } static void kvmppc_unmap_pte(struct kvm *kvm, pte_t *pte, - unsigned long gpa, unsigned int shift) + unsigned long gpa, unsigned int shift, + struct kvm_memory_slot *memslot) { - unsigned long page_size = 1ul << shift; unsigned long old; old = kvmppc_radix_update_pte(kvm, pte, ~0UL, 0, gpa, shift); kvmppc_radix_tlbie_page(kvm, gpa, shift); if (old & _PAGE_DIRTY) { unsigned long gfn = gpa >> PAGE_SHIFT; - struct kvm_memory_slot *memslot; + unsigned long page_size = PAGE_SIZE; - memslot = gfn_to_memslot(kvm, gfn); + if (shift) + page_size = 1ul << shift; + if (!memslot) + memslot = gfn_to_memslot(kvm, gfn); if (memslot && memslot->dirty_bitmap) kvmppc_update_dirty_map(memslot, gfn, page_size); } @@ -282,7 +285,7 @@ static void kvmppc_unmap_free_pte(struct kvm *kvm, pte_t *pte, bool full) WARN_ON_ONCE(1); kvmppc_unmap_pte(kvm, p, pte_pfn(*p) << PAGE_SHIFT, - PAGE_SHIFT); + PAGE_SHIFT, NULL); } } @@ -304,7 +307,7 @@ static void kvmppc_unmap_free_pmd(struct kvm *kvm, pmd_t *pmd, bool full) WARN_ON_ONCE(1); kvmppc_unmap_pte(kvm, (pte_t *)p, pte_pfn(*(pte_t *)p) << PAGE_SHIFT, - PMD_SHIFT); + PMD_SHIFT, NULL); } } else { pte_t *pte; @@ -468,7 +471,7 @@ static int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte, goto out_unlock; } /* Valid 1GB page here already, remove it */ - kvmppc_unmap_pte(kvm, (pte_t *)pud, hgpa, PUD_SHIFT); + kvmppc_unmap_pte(kvm, (pte_t *)pud, hgpa, PUD_SHIFT, NULL); } if (level == 2) { if (!pud_none(*pud)) { @@ -517,7 +520,7 @@ static int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte, goto out_unlock; } /* Valid 2MB page here already, remove it */ - kvmppc_unmap_pte(kvm, pmdp_ptep(pmd), lgpa, PMD_SHIFT); + kvmppc_unmap_pte(kvm, pmdp_ptep(pmd), lgpa, PMD_SHIFT, NULL); } if (level == 1) { if (!pmd_none(*pmd)) { @@ -780,20 +783,10 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, pte_t *ptep; unsigned long gpa = gfn << PAGE_SHIFT; unsigned int shift; - unsigned long old; ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); - if (ptep && pte_present(*ptep)) { - old = kvmppc_radix_update_pte(kvm, ptep, ~0UL, 0, - gpa, shift); - kvmppc_radix_tlbie_page(kvm, gpa, shift); - if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) { - unsigned long psize = PAGE_SIZE; - if (shift) - psize = 1ul << shift; - kvmppc_update_dirty_map(memslot, gfn, psize); - } - } + if (ptep && pte_present(*ptep)) + kvmppc_unmap_pte(kvm, ptep, gpa, shift, memslot); return 0; }