Subject: [PATCH v3 15/21] KVM: arm64: Convert memslot cache-flushing code to generic page-table API

From: Will Deacon <[email-masked]>
Date: Tue, 25 Aug 2020 10:39:47 +0100

From: Quentin Perret <[email-masked]>

Convert stage2_flush_memslot() to call the kvm_pgtable_stage2_flush()
function of the generic page-table code instead of walking the page-table
directly.

Cc: Marc Zyngier <[email-masked]>
Signed-off-by: Quentin Perret <[email-masked]>
Signed-off-by: Will Deacon <[email-masked]>
---
 arch/arm64/kvm/mmu.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index ca2c37c91e0b..d4b0716a6ab4 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -455,21 +455,10 @@ static void stage2_flush_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
 static void stage2_flush_memslot(struct kvm *kvm,
 				 struct kvm_memory_slot *memslot)
 {
-	struct kvm_s2_mmu *mmu = &kvm->arch.mmu;
 	phys_addr_t addr = memslot->base_gfn << PAGE_SHIFT;
 	phys_addr_t end = addr + PAGE_SIZE * memslot->npages;
-	phys_addr_t next;
-	pgd_t *pgd;
-
-	pgd = mmu->pgd + stage2_pgd_index(kvm, addr);
-	do {
-		next = stage2_pgd_addr_end(kvm, addr, end);
-		if (!stage2_pgd_none(kvm, *pgd))
-			stage2_flush_p4ds(mmu, pgd, addr, next);
 
-		if (next != end)
-			cond_resched_lock(&kvm->mmu_lock);
-	} while (pgd++, addr = next, addr != end);
+	stage2_apply_range_resched(kvm, addr, end, kvm_pgtable_stage2_flush);
 }
 
 /**
-- 
2.28.0.297.g1956fa8f8d-goog

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