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Subject: Re: [PATCH 06/14] KVM: Drop obsolete kvm_arch_vcpu_block_finish()
To:     Sean Christopherson <seanjc@google.com>,
        Marc Zyngier <maz@kernel.org>,
        Huacai Chen <chenhuacai@kernel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
        Paul Mackerras <paulus@ozlabs.org>,
        Janosch Frank <frankja@linux.ibm.com>,
        Paolo Bonzini <pbonzini@redhat.com>
Cc:     James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        David Hildenbrand <david@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Claudio Imbrenda <imbrenda@linux.ibm.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@vger.kernel.org,
        kvm-ppc@vger.kernel.org, linux-kernel@vger.kernel.org,
        David Matlack <dmatlack@google.com>,
        Jing Zhang <jingzhangos@google.com>
References: <20210925005528.1145584-1-seanjc@google.com>
 <20210925005528.1145584-7-seanjc@google.com>
From:   Christian Borntraeger <borntraeger@de.ibm.com>
Message-ID: <67f2fede-8f36-6052-44c9-ef5c6d28d143@de.ibm.com>
Date:   Mon, 27 Sep 2021 08:58:45 +0200
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Am 25.09.21 um 02:55 schrieb Sean Christopherson:
> Drop kvm_arch_vcpu_block_finish() now that all arch implementations are
> nops.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@google.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>

> ---
>   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/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 -
>   7 files changed, 13 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index f8be56d5342b..4e0ad0fff540 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 59cb38b04ede..8a84448d77a6 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -864,6 +864,5 @@ 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/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 1e0e909b98b2..4e8c21083bdb 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1916,8 +1916,6 @@ 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 2ba22b68af3b..2015a1f532ce 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -3301,7 +3301,6 @@ 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);
>   
>