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From: lantianyu1986@gmail.com
Cc: kvm@vger.kernel.org, rkrcmar@redhat.com, catalin.marinas@arm.com,
	will.deacon@arm.com, christoffer.dall@arm.com, hpa@zytor.com,
	kys@microsoft.com, kvmarm@lists.cs.columbia.edu, x86@kernel.org,
	linux@armlinux.org.uk, michael.h.kelley@microsoft.com,
	mingo@redhat.com, jhogan@kernel.org, linux-mips@vger.kernel.org,
	Lan Tianyu <Tianyu.Lan@microsoft.com>,
	marc.zyngier@arm.com, kvm-ppc@vger.kernel.org, bp@alien8.de,
	tglx@linutronix.de, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, ralf@linux-mips.org,
	paul.burton@mips.com, pbonzini@redhat.com, vkuznets@redhat.com,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 10/11] KVM: Add flush parameter for kvm_age_hva()
Date: Fri,  4 Jan 2019 16:54:04 +0800	[thread overview]
Message-ID: <20190104085405.40356-11-Tianyu.Lan@microsoft.com> (raw)
In-Reply-To: <20190104085405.40356-1-Tianyu.Lan@microsoft.com>

From: Lan Tianyu <Tianyu.Lan@microsoft.com>

This patch is to add flush parameter for kvm_aga_hva() and inside code
can check whether tlb flush is necessary when associated sptes are changed.
The platform may just flush affected address tlbs instead of entire
table's.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
 arch/arm/include/asm/kvm_host.h     | 3 ++-
 arch/arm64/include/asm/kvm_host.h   | 3 ++-
 arch/mips/include/asm/kvm_host.h    | 3 ++-
 arch/mips/kvm/mmu.c                 | 3 ++-
 arch/powerpc/include/asm/kvm_host.h | 3 ++-
 arch/powerpc/kvm/book3s.c           | 3 ++-
 arch/powerpc/kvm/e500_mmu_host.c    | 3 ++-
 arch/x86/include/asm/kvm_host.h     | 3 ++-
 arch/x86/kvm/mmu.c                  | 5 +++--
 virt/kvm/arm/mmu.c                  | 3 ++-
 virt/kvm/kvm_main.c                 | 4 ++--
 11 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 4f3400a74a17..7d7f9ff27500 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -229,7 +229,8 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 
 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 
 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 063886be25ad..6f4539e13a26 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -361,7 +361,8 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
 int kvm_unmap_hva_range(struct kvm *kvm,
 			unsigned long start, unsigned long end);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 
 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 71c3f21d80d5..ae1b079ad740 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -934,7 +934,8 @@ enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu,
 int kvm_unmap_hva_range(struct kvm *kvm,
 			unsigned long start, unsigned long end);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 
 /* Emulation */
diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index f36ccb2d43ec..b69baf01dbac 100644
--- a/arch/mips/kvm/mmu.c
+++ b/arch/mips/kvm/mmu.c
@@ -582,7 +582,8 @@ static int kvm_test_age_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
 	return pte_young(*gpa_pte);
 }
 
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush)
 {
 	return handle_hva_to_gpa(kvm, start, end, kvm_age_hva_handler, NULL);
 }
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 0f98f00da2ea..d160e6b8ccfb 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -70,7 +70,8 @@
 
 extern int kvm_unmap_hva_range(struct kvm *kvm,
 			       unsigned long start, unsigned long end);
-extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		       bool flush);
 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 extern int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index bd1a677dd9e4..430a8b81ef81 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -841,7 +841,8 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 	return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 }
 
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush)
 {
 	return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 }
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index c3f312b2bcb3..e2f6c23ec39a 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -745,7 +745,8 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 	return 0;
 }
 
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush)
 {
 	/* XXX could be more clever ;) */
 	return 0;
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 22dbaa8fba32..4f3ff9d5b631 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1518,7 +1518,8 @@ asmlinkage void kvm_spurious_fault(void);
 
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end);
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 30ed7a79335b..a5728f51bf7d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1995,9 +1995,10 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
 			KVM_PAGES_PER_HPAGE(sp->role.level));
 }
 
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush)
 {
-	return kvm_handle_hva_range(kvm, start, end, 0, kvm_age_rmapp);
+	return kvm_handle_hva_range(kvm, start, end, flush, kvm_age_rmapp);
 }
 
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 232007ff3208..bbea7cfd6909 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -2110,7 +2110,8 @@ static int kvm_test_age_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *
 		return pte_young(*pte);
 }
 
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end,
+		bool flush)
 {
 	if (!kvm->arch.pgd)
 		return 0;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index bcbe059d98be..afec5787fc1d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -432,7 +432,7 @@ static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,
 	idx = srcu_read_lock(&kvm->srcu);
 	spin_lock(&kvm->mmu_lock);
 
-	young = kvm_age_hva(kvm, start, end);
+	young = kvm_age_hva(kvm, start, end, true);
 	if (young)
 		kvm_flush_remote_tlbs(kvm);
 
@@ -465,7 +465,7 @@ static int kvm_mmu_notifier_clear_young(struct mmu_notifier *mn,
 	 * cadence. If we find this inaccurate, we might come up with a
 	 * more sophisticated heuristic later.
 	 */
-	young = kvm_age_hva(kvm, start, end);
+	young = kvm_age_hva(kvm, start, end, false);
 	spin_unlock(&kvm->mmu_lock);
 	srcu_read_unlock(&kvm->srcu, idx);
 
-- 
2.14.4


      parent reply	other threads:[~2019-01-04  9:12 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-04  8:53 [PATCH 00/11] X86/KVM/Hyper-V: Add HV ept tlb range list flush support in KVM lantianyu1986
2019-01-04  8:53 ` [PATCH 1/11] X86/Hyper-V: Add parameter offset for hyperv_fill_flush_guest_mapping_list() lantianyu1986
2019-01-04  8:53 ` [PATCH 2/11] KVM/VMX: Fill range list in kvm_fill_hv_flush_list_func() lantianyu1986
2019-01-04  8:53 ` [PATCH 3/11] KVM: Add spte's point in the struct kvm_mmu_page lantianyu1986
2019-01-07 16:34   ` Paolo Bonzini
2019-01-04  8:53 ` [PATCH 4/11] KVM/MMU: Introduce tlb flush with range list lantianyu1986
2019-01-07 16:39   ` Paolo Bonzini
2019-01-04  8:53 ` [PATCH 5/11] KVM/MMU: Flush tlb directly in the kvm_mmu_slot_gfn_write_protect() lantianyu1986
2019-01-04  8:54 ` [PATCH 6/11] KVM/MMU: Flush tlb with range list in sync_page() lantianyu1986
2019-01-04 16:30   ` Sean Christopherson
2019-01-07  5:13     ` Tianyu Lan
2019-01-07 16:07     ` Paolo Bonzini
2019-01-04  8:54 ` [PATCH 7/11] KVM: Remove redundant check in the kvm_get_dirty_log_protect() lantianyu1986
2019-01-04 15:50   ` Sean Christopherson
2019-01-04 21:27     ` Sean Christopherson
2019-01-07 16:20     ` Paolo Bonzini
2019-01-04  8:54 ` [PATCH 8/11] KVM: Make kvm_arch_mmu_enable_log_dirty_pt_masked() return value lantianyu1986
2019-01-04  8:54 ` [PATCH 9/11] KVM/MMU: Flush tlb in the kvm_mmu_write_protect_pt_masked() lantianyu1986
2019-01-07 16:26   ` Paolo Bonzini
2019-01-10  9:06     ` Tianyu Lan
2019-01-04  8:54 ` lantianyu1986 [this message]

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