linux-kernel - [PATCH v3 07/10] KVM: MMU: introduce kvm_zap

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Message-Id: <1431499348-25188-8-git-send-email-guangrong.xiao@linux.intel.com>
Date:	Wed, 13 May 2015 14:42:25 +0800
From:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
To:	pbonzini@...hat.com
Cc:	gleb@...nel.org, mtosatti@...hat.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
Subject: [PATCH v3 07/10] KVM: MMU: introduce kvm_zap_rmapp

Split kvm_unmap_rmapp and introduce kvm_zap_rmapp which will be used in the
later patch

Signed-off-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
---
 arch/x86/kvm/mmu.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c059822..a990ad9 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1349,24 +1349,28 @@ static bool rmap_write_protect(struct kvm *kvm, u64 gfn)
 	return write_protected;
 }
 
-static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp,
-			   struct kvm_memory_slot *slot, gfn_t gfn, int level,
-			   unsigned long data)
+static bool kvm_zap_rmapp(struct kvm *kvm, unsigned long *rmapp)
 {
 	u64 *sptep;
 	struct rmap_iterator iter;
-	int need_tlb_flush = 0;
+	bool flush = false;
 
 	while ((sptep = rmap_get_first(*rmapp, &iter))) {
 		BUG_ON(!(*sptep & PT_PRESENT_MASK));
-		rmap_printk("kvm_rmap_unmap_hva: spte %p %llx gfn %llx (%d)\n",
-			     sptep, *sptep, gfn, level);
+		rmap_printk("%s: spte %p %llx.\n", __func__, sptep, *sptep);
 
 		drop_spte(kvm, sptep);
-		need_tlb_flush = 1;
+		flush = true;
 	}
 
-	return need_tlb_flush;
+	return flush;
+}
+
+static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp,
+			   struct kvm_memory_slot *slot, gfn_t gfn, int level,
+			   unsigned long data)
+{
+	return kvm_zap_rmapp(kvm, rmapp);
 }
 
 static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp,
-- 
2.1.0

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