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Reply-To: Sean Christopherson <seanjc@google.com>
Date:   Fri,  8 Oct 2021 19:12:31 -0700
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Subject: [PATCH v2 38/43] KVM: Drop defunct kvm_arch_vcpu_(un)blocking() hooks
From:   Sean Christopherson <seanjc@google.com>
To:     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>
Cc:     James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Atish Patra <atish.patra@wdc.com>,
        David Hildenbrand <david@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Claudio Imbrenda <imbrenda@linux.ibm.com>,
        Sean Christopherson <seanjc@google.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, kvm-riscv@lists.infradead.org,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        David Matlack <dmatlack@google.com>,
        Oliver Upton <oupton@google.com>,
        Jing Zhang <jingzhangos@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Remove kvm_arch_vcpu_(un)blocking() now that all implementations are nops.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/arm64/kvm/arm.c                | 10 ----------
 arch/mips/include/asm/kvm_host.h    |  2 --
 arch/powerpc/include/asm/kvm_host.h |  2 --
 arch/s390/include/asm/kvm_host.h    |  2 --
 arch/x86/include/asm/kvm-x86-ops.h  |  2 --
 arch/x86/include/asm/kvm_host.h     | 13 -------------
 include/linux/kvm_host.h            |  2 --
 virt/kvm/kvm_main.c                 |  4 ----
 8 files changed, 37 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 9ff0e85a9f16..444d6f5a980a 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -357,16 +357,6 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 	return kvm_timer_is_pending(vcpu);
 }
 
-void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
-{
-
-}
-
-void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
-{
-
-}
-
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 {
 	struct kvm_s2_mmu *mmu;
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 72b90d45a46e..28110f71089b 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -895,8 +895,6 @@ static inline void kvm_arch_free_memslot(struct kvm *kvm,
 					 struct kvm_memory_slot *slot) {}
 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) {}
 
 #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 4a195c161592..0dfee6866541 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -863,7 +863,5 @@ static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 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) {}
 
 #endif /* __POWERPC_KVM_HOST_H__ */
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index a22c9266ea05..25ed4ec66f4a 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -1007,7 +1007,5 @@ static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 		struct kvm_memory_slot *slot) {}
-static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
-static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
 
 #endif
diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h
index c2b007171abd..f2c38acdcad6 100644
--- a/arch/x86/include/asm/kvm-x86-ops.h
+++ b/arch/x86/include/asm/kvm-x86-ops.h
@@ -96,8 +96,6 @@ KVM_X86_OP(handle_exit_irqoff)
 KVM_X86_OP_NULL(request_immediate_exit)
 KVM_X86_OP(sched_in)
 KVM_X86_OP_NULL(update_cpu_dirty_logging)
-KVM_X86_OP_NULL(vcpu_blocking)
-KVM_X86_OP_NULL(vcpu_unblocking)
 KVM_X86_OP_NULL(update_pi_irte)
 KVM_X86_OP_NULL(start_assignment)
 KVM_X86_OP_NULL(apicv_post_state_restore)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 76a8dddc1a48..bebd42926321 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1445,9 +1445,6 @@ struct kvm_x86_ops {
 	const struct kvm_pmu_ops *pmu_ops;
 	const struct kvm_x86_nested_ops *nested_ops;
 
-	void (*vcpu_blocking)(struct kvm_vcpu *vcpu);
-	void (*vcpu_unblocking)(struct kvm_vcpu *vcpu);
-
 	int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq,
 			      uint32_t guest_irq, bool set);
 	void (*start_assignment)(struct kvm *kvm);
@@ -1904,16 +1901,6 @@ static inline bool kvm_irq_is_postable(struct kvm_lapic_irq *irq)
 		irq->delivery_mode == APIC_DM_LOWEST);
 }
 
-static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
-{
-	static_call_cond(kvm_x86_vcpu_blocking)(vcpu);
-}
-
-static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
-{
-	static_call_cond(kvm_x86_vcpu_unblocking)(vcpu);
-}
-
 static inline int kvm_cpu_get_apicid(int mps_cpu)
 {
 #ifdef CONFIG_X86_LOCAL_APIC
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c5961a361c73..6a84b020daa6 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -966,8 +966,6 @@ void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
 
 void kvm_vcpu_halt(struct kvm_vcpu *vcpu);
 bool kvm_vcpu_block(struct kvm_vcpu *vcpu);
-void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
-void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
 bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index c1850b60f38b..96de905e26e4 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3210,8 +3210,6 @@ bool kvm_vcpu_block(struct kvm_vcpu *vcpu)
 
 	vcpu->stat.generic.blocking = 1;
 
-	kvm_arch_vcpu_blocking(vcpu);
-
 	prepare_to_rcuwait(wait);
 	for (;;) {
 		set_current_state(TASK_INTERRUPTIBLE);
@@ -3224,8 +3222,6 @@ bool kvm_vcpu_block(struct kvm_vcpu *vcpu)
 	}
 	finish_rcuwait(wait);
 
-	kvm_arch_vcpu_unblocking(vcpu);
-
 	vcpu->stat.generic.blocking = 0;
 
 	return waited;
-- 
2.33.0.882.g93a45727a2-goog