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Message-Id: <20190104085405.40356-11-Tianyu.Lan@microsoft.com>
Date: Fri, 4 Jan 2019 16:54:04 +0800
From: lantianyu1986@...il.com
To: unlisted-recipients:; (no To-header on input)
Cc: Lan Tianyu <Tianyu.Lan@...rosoft.com>, christoffer.dall@....com,
marc.zyngier@....com, linux@...linux.org.uk,
catalin.marinas@....com, will.deacon@....com, jhogan@...nel.org,
ralf@...ux-mips.org, paul.burton@...s.com, paulus@...abs.org,
benh@...nel.crashing.org, mpe@...erman.id.au, pbonzini@...hat.com,
rkrcmar@...hat.com, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de, hpa@...or.com, x86@...nel.org,
linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
kvm-ppc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
kvm@...r.kernel.org, michael.h.kelley@...rosoft.com,
kys@...rosoft.com, vkuznets@...hat.com
Subject: [PATCH 10/11] KVM: Add flush parameter for kvm_age_hva()
From: Lan Tianyu <Tianyu.Lan@...rosoft.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@...rosoft.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
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