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Fri, 04 Jan 2019 00:55:34 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com To: Subject: [PATCH 10/11] KVM: Add flush parameter for kvm_age_hva() Date: Fri, 4 Jan 2019 16:54:04 +0800 Message-Id: <20190104085405.40356-11-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20190104085405.40356-1-Tianyu.Lan@microsoft.com> References: <20190104085405.40356-1-Tianyu.Lan@microsoft.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190104_005536_214599_6C331CAF X-CRM114-Status: GOOD ( 12.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, rkrcmar@redhat.com, catalin.marinas@arm.com, will.deacon@arm.com, christoffer.dall@arm.com, paulus@ozlabs.org, hpa@zytor.com, kys@microsoft.com, kvmarm@lists.cs.columbia.edu, mpe@ellerman.id.au, x86@kernel.org, linux@armlinux.org.uk, michael.h.kelley@microsoft.com, mingo@redhat.com, benh@kernel.crashing.org, jhogan@kernel.org, linux-mips@vger.kernel.org, Lan Tianyu , 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 MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lan Tianyu 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 --- 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);