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From:   Anup Patel <anup@brainfault.org>
Date:   Fri, 22 Oct 2021 20:32:49 +0530
Message-ID: <CAAhSdy1Wr6ODjDWd4V23Dh6M-V4LB1y1a+qwuxXe8CaZSgi9kw@mail.gmail.com>
Subject: Re: [PATCH v2 09/43] KVM: Drop obsolete kvm_arch_vcpu_block_finish()
To:     Sean Christopherson <seanjc@google.com>
Cc:     Marc Zyngier <maz@kernel.org>, Huacai Chen <chenhuacai@kernel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
        Paul Mackerras <paulus@ozlabs.org>,
        Anup Patel <anup.patel@wdc.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Janosch Frank <frankja@linux.ibm.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        KVM General <kvm@vger.kernel.org>,
        David Hildenbrand <david@redhat.com>,
        "linux-kernel@vger.kernel.org List" <linux-kernel@vger.kernel.org>,
        Atish Patra <atish.patra@wdc.com>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        Claudio Imbrenda <imbrenda@linux.ibm.com>,
        kvmarm@lists.cs.columbia.edu, Joerg Roedel <joro@8bytes.org>,
        kvm-ppc@vger.kernel.org, David Matlack <dmatlack@google.com>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        Jim Mattson <jmattson@google.com>,
        Cornelia Huck <cohuck@redhat.com>, linux-mips@vger.kernel.org,
        kvm-riscv@lists.infradead.org,
        Vitaly Kuznetsov <vkuznets@redhat.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Sat, Oct 9, 2021 at 7:43 AM Sean Christopherson <seanjc@google.com> wrote:
>
> Drop kvm_arch_vcpu_block_finish() now that all arch implementations are
> nops.
>
> No functional change intended.
>
> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Reviewed-by: David Matlack <dmatlack@google.com>
> Signed-off-by: Sean Christopherson <seanjc@google.com>

For KVM RISC-V:
Acked-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>

Regards,
Anup

> ---
>  arch/arm64/include/asm/kvm_host.h   | 1 -
>  arch/mips/include/asm/kvm_host.h    | 1 -
>  arch/powerpc/include/asm/kvm_host.h | 1 -
>  arch/riscv/include/asm/kvm_host.h   | 1 -
>  arch/s390/include/asm/kvm_host.h    | 2 --
>  arch/s390/kvm/kvm-s390.c            | 5 -----
>  arch/x86/include/asm/kvm_host.h     | 2 --
>  virt/kvm/kvm_main.c                 | 1 -
>  8 files changed, 14 deletions(-)
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 369c30e28301..fe4dec96d1c3 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -716,7 +716,6 @@ void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu);
>  static inline void kvm_arch_hardware_unsetup(void) {}
>  static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
> -static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
>
>  void kvm_arm_init_debug(void);
>  void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu);
> diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
> index 696f6b009377..72b90d45a46e 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -897,7 +897,6 @@ static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
>  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>  static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
>  static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
> -static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
>
>  #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
>  int kvm_arch_flush_remote_tlb(struct kvm *kvm);
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 876c10803cda..4a195c161592 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -865,6 +865,5 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>  static inline void kvm_arch_exit(void) {}
>  static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
>  static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
> -static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
>
>  #endif /* __POWERPC_KVM_HOST_H__ */
> diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
> index d7e1696cd2ec..b3f0c3773603 100644
> --- a/arch/riscv/include/asm/kvm_host.h
> +++ b/arch/riscv/include/asm/kvm_host.h
> @@ -209,7 +209,6 @@ struct kvm_vcpu_arch {
>  static inline void kvm_arch_hardware_unsetup(void) {}
>  static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
> -static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
>
>  #define KVM_ARCH_WANT_MMU_NOTIFIER
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index a604d51acfc8..a22c9266ea05 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -1010,6 +1010,4 @@ static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
>  static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
>  static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
>
> -void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu);
> -
>  #endif
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 08ed68639a21..17fabb260c35 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -5080,11 +5080,6 @@ static inline unsigned long nonhyp_mask(int i)
>         return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
>  }
>
> -void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
> -{
> -
> -}
> -
>  static int __init kvm_s390_init(void)
>  {
>         int i;
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 88f0326c184a..7aafc27ce7a9 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1926,8 +1926,6 @@ static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
>         static_call_cond(kvm_x86_vcpu_unblocking)(vcpu);
>  }
>
> -static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
> -
>  static inline int kvm_cpu_get_apicid(int mps_cpu)
>  {
>  #ifdef CONFIG_X86_LOCAL_APIC
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 1292c7876d3f..f90b3ed05628 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -3304,7 +3304,6 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
>         }
>
>         trace_kvm_vcpu_wakeup(block_ns, waited, vcpu_valid_wakeup(vcpu));
> -       kvm_arch_vcpu_block_finish(vcpu);
>  }
>  EXPORT_SYMBOL_GPL(kvm_vcpu_block);
>
> --
> 2.33.0.882.g93a45727a2-goog
>
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