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From: Paolo Bonzini <pbonzini@redhat.com>
To: Marc Zyngier <maz@kernel.org>
Cc: "James Morse" <james.morse@arm.com>,
	"Julien Thierry" <julien.thierry.kdev@gmail.com>,
	"Suzuki K Poulose" <suzuki.poulose@arm.com>,
	"James Hogan" <jhogan@kernel.org>,
	"Paul Mackerras" <paulus@ozlabs.org>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Sean Christopherson" <sean.j.christopherson@intel.com>,
	"Vitaly Kuznetsov" <vkuznets@redhat.com>,
	"Wanpeng Li" <wanpengli@tencent.com>,
	"Jim Mattson" <jmattson@google.com>,
	"Joerg Roedel" <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 1/7] KVM: Pass mmu_notifier_range down to kvm_unmap_hva_range()
Date: Wed, 15 Jan 2020 19:10:40 +0100	[thread overview]
Message-ID: <0e2290e4-287f-f3fc-98e0-082056c91511@redhat.com> (raw)
In-Reply-To: <20191213182503.14460-2-maz@kernel.org>

On 13/12/19 19:24, Marc Zyngier wrote:
> kvm_unmap_hva_range() is currently passed both start and end
> fields from the mmu_notifier_range structure. As this struct
> now contains important information about the reason of the
> unmap (the event field), replace the start/end parameters
> with the range struct, and update all architectures.
> 
> No functionnal change.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>  arch/arm/include/asm/kvm_host.h     | 2 +-
>  arch/arm64/include/asm/kvm_host.h   | 2 +-
>  arch/mips/include/asm/kvm_host.h    | 2 +-
>  arch/mips/kvm/mmu.c                 | 6 ++++--
>  arch/powerpc/include/asm/kvm_host.h | 2 +-
>  arch/powerpc/kvm/book3s.c           | 5 +++--
>  arch/powerpc/kvm/e500_mmu_host.c    | 4 ++--
>  arch/x86/include/asm/kvm_host.h     | 3 ++-
>  arch/x86/kvm/mmu/mmu.c              | 5 +++--
>  arch/x86/kvm/x86.c                  | 4 ++--
>  include/linux/kvm_host.h            | 2 +-
>  virt/kvm/arm/mmu.c                  | 8 ++++----
>  virt/kvm/kvm_main.c                 | 7 +++----
>  13 files changed, 28 insertions(+), 24 deletions(-)
> 
> diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
> index 556cd818eccf..621c71594499 100644
> --- a/arch/arm/include/asm/kvm_host.h
> +++ b/arch/arm/include/asm/kvm_host.h
> @@ -276,7 +276,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
>  
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
>  int kvm_unmap_hva_range(struct kvm *kvm,
> -			unsigned long start, unsigned long end);
> +			const struct mmu_notifier_range *range);
>  int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
>  
>  unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index c61260cf63c5..dd850f5e81e3 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -441,7 +441,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
>  
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
>  int kvm_unmap_hva_range(struct kvm *kvm,
> -			unsigned long start, unsigned long end);
> +			const struct mmu_notifier_range *range);
>  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_test_age_hva(struct kvm *kvm, unsigned long hva);
> diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
> index 41204a49cf95..0ed065870f1b 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -935,7 +935,7 @@ enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu,
>  
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
>  int kvm_unmap_hva_range(struct kvm *kvm,
> -			unsigned long start, unsigned long end);
> +			const struct mmu_notifier_range *range);
>  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_test_age_hva(struct kvm *kvm, unsigned long hva);
> diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
> index 7dad7a293eae..32ef868258b9 100644
> --- a/arch/mips/kvm/mmu.c
> +++ b/arch/mips/kvm/mmu.c
> @@ -518,9 +518,11 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
>  	return 1;
>  }
>  
> -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
> +int kvm_unmap_hva_range(struct kvm *kvm,
> +			const struct mmu_notifier_range *range)
>  {
> -	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
> +	handle_hva_to_gpa(kvm, range->start, range->end,
> +			  &kvm_unmap_hva_handler, NULL);
>  
>  	kvm_mips_callbacks->flush_shadow_all(kvm);
>  	return 0;
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 0a398f2321c2..8cef585e0abe 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -58,7 +58,7 @@
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
>  
>  extern int kvm_unmap_hva_range(struct kvm *kvm,
> -			       unsigned long start, unsigned long end);
> +			       const struct mmu_notifier_range *range);
>  extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
>  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 58a59ee998e2..a1529a0dd656 100644
> --- a/arch/powerpc/kvm/book3s.c
> +++ b/arch/powerpc/kvm/book3s.c
> @@ -842,9 +842,10 @@ void kvmppc_core_commit_memory_region(struct kvm *kvm,
>  	kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
>  }
>  
> -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
> +int kvm_unmap_hva_range(struct kvm *kvm,
> +			const struct mmu_notifier_range *range)
>  {
> -	return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
> +	return kvm->arch.kvm_ops->unmap_hva_range(kvm, range->start, range->end);
>  }
>  
>  int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
> diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
> index 425d13806645..5a7211901063 100644
> --- a/arch/powerpc/kvm/e500_mmu_host.c
> +++ b/arch/powerpc/kvm/e500_mmu_host.c
> @@ -734,10 +734,10 @@ static int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
>  	return 0;
>  }
>  
> -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
> +int kvm_unmap_hva_range(struct kvm *kvm, const struct mmu_notifier_range *range)
>  {
>  	/* kvm_unmap_hva flushes everything anyways */
> -	kvm_unmap_hva(kvm, start);
> +	kvm_unmap_hva(kvm, range->start);
>  
>  	return 0;
>  }
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index b79cd6aa4075..c479fa845d72 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1569,7 +1569,8 @@ asmlinkage void kvm_spurious_fault(void);
>  	_ASM_EXTABLE(666b, 667b)
>  
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
> -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end);
> +int kvm_unmap_hva_range(struct kvm *kvm,
> +			const struct mmu_notifier_range *range);
>  int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
>  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);
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 6f92b40d798c..86831be07c17 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -2040,9 +2040,10 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
>  	return kvm_handle_hva_range(kvm, hva, hva + 1, data, handler);
>  }
>  
> -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
> +int kvm_unmap_hva_range(struct kvm *kvm,
> +			const struct mmu_notifier_range *range);
>  {
> -	return kvm_handle_hva_range(kvm, start, end, 0, kvm_unmap_rmapp);
> +	return kvm_handle_hva_range(kvm, range->start, range->end, 0, kvm_unmap_rmapp);
>  }
>  
>  int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index cf917139de6b..c1a238f4ee35 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -7942,7 +7942,7 @@ static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu)
>  }
>  
>  int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
> -		unsigned long start, unsigned long end,
> +		const struct mmu_notifier_range *range,
>  		bool blockable)
>  {
>  	unsigned long apic_address;
> @@ -7952,7 +7952,7 @@ int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
>  	 * Update it when it becomes invalid.
>  	 */
>  	apic_address = gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT);
> -	if (start <= apic_address && apic_address < end)
> +	if (range->start <= apic_address && apic_address < range->end)
>  		kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD);
>  
>  	return 0;
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 7ed1e2f8641e..d6e2ae2accc4 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -1391,7 +1391,7 @@ static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
>  #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
>  
>  int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
> -		unsigned long start, unsigned long end, bool blockable);
> +		const struct mmu_notifier_range *range, bool blockable);
>  
>  #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
>  int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
> diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
> index 38b4c910b6c3..078e10c5650e 100644
> --- a/virt/kvm/arm/mmu.c
> +++ b/virt/kvm/arm/mmu.c
> @@ -2035,14 +2035,14 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *dat
>  	return 0;
>  }
>  
> -int kvm_unmap_hva_range(struct kvm *kvm,
> -			unsigned long start, unsigned long end)
> +int kvm_unmap_hva_range(struct kvm *kvm, const struct mmu_notifier_range *range)
>  {
>  	if (!kvm->arch.pgd)
>  		return 0;
>  
> -	trace_kvm_unmap_hva_range(start, end);
> -	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
> +	trace_kvm_unmap_hva_range(range->start, range->end);
> +	handle_hva_to_gpa(kvm, range->start, range->end,
> +			  &kvm_unmap_hva_handler, NULL);
>  	return 0;
>  }
>  
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 00268290dcbd..7c3665ad1035 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -158,7 +158,7 @@ static unsigned long long kvm_createvm_count;
>  static unsigned long long kvm_active_vms;
>  
>  __weak int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
> -		unsigned long start, unsigned long end, bool blockable)
> +		const struct mmu_notifier_range *range, bool blockable)
>  {
>  	return 0;
>  }
> @@ -415,7 +415,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
>  	 * count is also read inside the mmu_lock critical section.
>  	 */
>  	kvm->mmu_notifier_count++;
> -	need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end);
> +	need_tlb_flush = kvm_unmap_hva_range(kvm, range);
>  	need_tlb_flush |= kvm->tlbs_dirty;
>  	/* we've to flush the tlb before the pages can be freed */
>  	if (need_tlb_flush)
> @@ -423,8 +423,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
>  
>  	spin_unlock(&kvm->mmu_lock);
>  
> -	ret = kvm_arch_mmu_notifier_invalidate_range(kvm, range->start,
> -					range->end,
> +	ret = kvm_arch_mmu_notifier_invalidate_range(kvm, range,
>  					mmu_notifier_range_blockable(range));
>  
>  	srcu_read_unlock(&kvm->srcu, idx);
> 

Acked-by: Paolo Bonzini <pbonzini@redhat.com>


  parent reply	other threads:[~2020-01-15 18:10 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-13 18:24 [PATCH 0/7] KVM: arm/arm64: Help VMs dying quicker Marc Zyngier
2019-12-13 18:24 ` [PATCH 1/7] KVM: Pass mmu_notifier_range down to kvm_unmap_hva_range() Marc Zyngier
2019-12-13 18:59   ` Suzuki Kuruppassery Poulose
2019-12-14 10:37     ` Marc Zyngier
2019-12-15 10:27   ` Marc Zyngier
2020-01-15 18:10   ` Paolo Bonzini [this message]
2019-12-13 18:24 ` [PATCH 2/7] KVM: arm/arm64: Pass flags along Stage-2 unmapping functions Marc Zyngier
2019-12-13 18:24 ` [PATCH 3/7] KVM: arm/arm64: Condition cache maintenance on unmap with a flag Marc Zyngier
2019-12-13 18:25 ` [PATCH 4/7] KVM: arm/arm64: Condition TLB " Marc Zyngier
2019-12-13 18:25 ` [PATCH 5/7] KVM: arm/arm64: Elide both CMOs and TBLIs on freeing the whole Stage-2 Marc Zyngier
2019-12-13 18:25 ` [PATCH 6/7] KVM: arm/arm64: Elide CMOs when retrying a block mapping Marc Zyngier
2019-12-13 18:25 ` [PATCH 7/7] KVM: arm/arm64: Elide CMOs when unmapping a range Marc Zyngier
2019-12-18 15:07   ` James Morse
2019-12-18 15:30     ` Marc Zyngier
2019-12-19 13:46       ` James Morse

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