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@xxxxxxxxxx>
> ---
> 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@xxxxxxxxxx>
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