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Tue, 30 Apr 2024 12:32:01 -0700 (PDT) Date: Tue, 30 Apr 2024 12:31:54 -0700 In-Reply-To: <20240430193157.419425-1-seanjc@google.com> Mime-Version: 1.0 References: <20240430193157.419425-1-seanjc@google.com> X-Mailer: git-send-email 2.45.0.rc0.197.gbae5840b3b-goog Message-ID: <20240430193157.419425-2-seanjc@google.com> Subject: [PATCH 1/4] KVM: Plumb in a @sched_in flag to kvm_arch_vcpu_load() From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Cc: kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add a @sched_in flag to kvm_arch_vcpu_load() to note that the vCPU is being (re)loaded by kvm_sched_in(), i.e. after the vCPU was previously scheduled out. KVM x86 currently uses a dedicated kvm_arch_sched_in() hook, but that's unnecessarily brittle as the behavior of the arch hook heavily depends on the arbitrary order of the two arch calls. A separate hook also makes it unnecessarily difficult to do something unique when re-loading vCPU during kvm_sched_in(), e.g. to optimize vCPU loading if KVM knows that some CPU state couldn't have changed while the vCPU was scheduled out. Signed-off-by: Sean Christopherson --- arch/arm64/kvm/arm.c | 2 +- arch/arm64/kvm/emulate-nested.c | 4 ++-- arch/arm64/kvm/reset.c | 2 +- arch/loongarch/kvm/vcpu.c | 2 +- arch/mips/kvm/mmu.c | 2 +- arch/powerpc/kvm/powerpc.c | 2 +- arch/riscv/kvm/vcpu.c | 4 ++-- arch/s390/kvm/kvm-s390.c | 2 +- arch/x86/kvm/x86.c | 2 +- include/linux/kvm_host.h | 2 +- virt/kvm/kvm_main.c | 4 ++-- 11 files changed, 14 insertions(+), 14 deletions(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index c4a0a35e02c7..30ea103bfacb 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -428,7 +428,7 @@ void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { struct kvm_s2_mmu *mmu; int *last_ran; diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 4697ba41b3a9..ad5458c47e5e 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -2193,7 +2193,7 @@ void kvm_emulate_nested_eret(struct kvm_vcpu *vcpu) *vcpu_pc(vcpu) = elr; *vcpu_cpsr(vcpu) = spsr; - kvm_arch_vcpu_load(vcpu, smp_processor_id()); + kvm_arch_vcpu_load(vcpu, smp_processor_id(), false); preempt_enable(); } @@ -2274,7 +2274,7 @@ static int kvm_inject_nested(struct kvm_vcpu *vcpu, u64 esr_el2, */ __kvm_adjust_pc(vcpu); - kvm_arch_vcpu_load(vcpu, smp_processor_id()); + kvm_arch_vcpu_load(vcpu, smp_processor_id(), false); preempt_enable(); return 1; diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 68d1d05672bd..654cf09c81e9 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -262,7 +262,7 @@ void kvm_reset_vcpu(struct kvm_vcpu *vcpu) kvm_timer_vcpu_reset(vcpu); if (loaded) - kvm_arch_vcpu_load(vcpu, smp_processor_id()); + kvm_arch_vcpu_load(vcpu, smp_processor_id(), false); preempt_enable(); } diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 3a8779065f73..61d549c4f8d1 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -1050,7 +1050,7 @@ static int _kvm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) return 0; } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { unsigned long flags; diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c index c17157e700c0..6797799f3f32 100644 --- a/arch/mips/kvm/mmu.c +++ b/arch/mips/kvm/mmu.c @@ -682,7 +682,7 @@ static void kvm_mips_migrate_count(struct kvm_vcpu *vcpu) } /* Restore ASID once we are scheduled back after preemption */ -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { unsigned long flags; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index d32abe7fe6ab..8de620716875 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -826,7 +826,7 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) return kvmppc_core_pending_dec(vcpu); } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { #ifdef CONFIG_BOOKE /* diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index b5ca9f2e98ac..a7b7f172fa61 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -87,7 +87,7 @@ static void kvm_riscv_reset_vcpu(struct kvm_vcpu *vcpu) /* Reset the guest CSRs for hotplug usecase */ if (loaded) - kvm_arch_vcpu_load(vcpu, smp_processor_id()); + kvm_arch_vcpu_load(vcpu, smp_processor_id(), false); put_cpu(); } @@ -507,7 +507,7 @@ static void kvm_riscv_vcpu_setup_config(struct kvm_vcpu *vcpu) } } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr; struct kvm_vcpu_config *cfg = &vcpu->arch.cfg; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 5147b943a864..9f04dc312641 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -3713,7 +3713,7 @@ __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) return value; } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool shed_in) { gmap_enable(vcpu->arch.enabled_gmap); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 2d2619d3eee4..925cadb18b55 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5003,7 +5003,7 @@ static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) return kvm_arch_has_noncoherent_dma(vcpu->kvm); } -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { /* Address WBINVD may be executed by guest */ if (need_emulate_wbinvd(vcpu)) { diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index afbc99264ffa..2f5e35eb7eab 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1498,7 +1498,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu); void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in); void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id); int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 658581d4ad68..4a4b29a9bace 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -211,7 +211,7 @@ void vcpu_load(struct kvm_vcpu *vcpu) __this_cpu_write(kvm_running_vcpu, vcpu); preempt_notifier_register(&vcpu->preempt_notifier); - kvm_arch_vcpu_load(vcpu, cpu); + kvm_arch_vcpu_load(vcpu, cpu, false); put_cpu(); } EXPORT_SYMBOL_GPL(vcpu_load); @@ -6279,7 +6279,7 @@ static void kvm_sched_in(struct preempt_notifier *pn, int cpu) __this_cpu_write(kvm_running_vcpu, vcpu); kvm_arch_sched_in(vcpu, cpu); - kvm_arch_vcpu_load(vcpu, cpu); + kvm_arch_vcpu_load(vcpu, cpu, true); } static void kvm_sched_out(struct preempt_notifier *pn, From patchwork Tue Apr 30 19:31:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 1929815 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=qgmB+jYl; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; 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AJvYcCVBe+Tryd24ijc39FEgP7VYFkPweKUj3efkP3BVusRzOKqZOjGXb3jdcVXrdUBHyzcu4D0WH4KJEeZsZiGbEI4Ed2Ygh46Xty0CgltY4Q== X-Gm-Message-State: AOJu0YyDrgraJrBxqFwWxDttInS+pSRq195rBIwSHKmGvfQB3fjoC4xB MOAzBaWRCh9yQzjYGzBz/htvIf6l4sWQ6OGjsPrt8R5dol+UNPRKwtSIByhTaYpoXBC4xuYYiU0 73A== X-Google-Smtp-Source: AGHT+IEbG2WGq5H7HJJ3oJz7X/vycBy/FzdcOadqmLeOQqQxGZZjzOUu53htbVlU23el0Z9xOdv4S0UMTZ0= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6a02:6a1:b0:5dc:5111:d8b1 with SMTP id ca33-20020a056a0206a100b005dc5111d8b1mr1313pgb.5.1714505523833; Tue, 30 Apr 2024 12:32:03 -0700 (PDT) Date: Tue, 30 Apr 2024 12:31:55 -0700 In-Reply-To: <20240430193157.419425-1-seanjc@google.com> Mime-Version: 1.0 References: <20240430193157.419425-1-seanjc@google.com> X-Mailer: git-send-email 2.45.0.rc0.197.gbae5840b3b-goog Message-ID: <20240430193157.419425-3-seanjc@google.com> Subject: [PATCH 2/4] KVM: VMX: Move PLE grow/shrink helpers above vmx_vcpu_load() From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Cc: kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Move VMX's {grow,shrink}_ple_window() above vmx_vcpu_load() in preparation of moving the sched_in logic, which handles shrinking the PLE window, into vmx_vcpu_load(). No functional change intended. Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/vmx.c | 64 +++++++++++++++++++++--------------------- 1 file changed, 32 insertions(+), 32 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 6780313914f8..cb36db7b6140 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1402,6 +1402,38 @@ static void vmx_write_guest_kernel_gs_base(struct vcpu_vmx *vmx, u64 data) } #endif +static void grow_ple_window(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned int old = vmx->ple_window; + + vmx->ple_window = __grow_ple_window(old, ple_window, + ple_window_grow, + ple_window_max); + + if (vmx->ple_window != old) { + vmx->ple_window_dirty = true; + trace_kvm_ple_window_update(vcpu->vcpu_id, + vmx->ple_window, old); + } +} + +static void shrink_ple_window(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned int old = vmx->ple_window; + + vmx->ple_window = __shrink_ple_window(old, ple_window, + ple_window_shrink, + ple_window); + + if (vmx->ple_window != old) { + vmx->ple_window_dirty = true; + trace_kvm_ple_window_update(vcpu->vcpu_id, + vmx->ple_window, old); + } +} + void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, struct loaded_vmcs *buddy) { @@ -5871,38 +5903,6 @@ int vmx_vcpu_pre_run(struct kvm_vcpu *vcpu) return 1; } -static void grow_ple_window(struct kvm_vcpu *vcpu) -{ - struct vcpu_vmx *vmx = to_vmx(vcpu); - unsigned int old = vmx->ple_window; - - vmx->ple_window = __grow_ple_window(old, ple_window, - ple_window_grow, - ple_window_max); - - if (vmx->ple_window != old) { - vmx->ple_window_dirty = true; - trace_kvm_ple_window_update(vcpu->vcpu_id, - vmx->ple_window, old); - } -} - -static void shrink_ple_window(struct kvm_vcpu *vcpu) -{ - struct vcpu_vmx *vmx = to_vmx(vcpu); - unsigned int old = vmx->ple_window; - - vmx->ple_window = __shrink_ple_window(old, ple_window, - ple_window_shrink, - ple_window); - - if (vmx->ple_window != old) { - vmx->ple_window_dirty = true; - trace_kvm_ple_window_update(vcpu->vcpu_id, - vmx->ple_window, old); - } -} - /* * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE * exiting, so only get here on cpu with PAUSE-Loop-Exiting. 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Tue, 30 Apr 2024 12:32:05 -0700 (PDT) Date: Tue, 30 Apr 2024 12:31:56 -0700 In-Reply-To: <20240430193157.419425-1-seanjc@google.com> Mime-Version: 1.0 References: <20240430193157.419425-1-seanjc@google.com> X-Mailer: git-send-email 2.45.0.rc0.197.gbae5840b3b-goog Message-ID: <20240430193157.419425-4-seanjc@google.com> Subject: [PATCH 3/4] KVM: x86: Fold kvm_arch_sched_in() into kvm_arch_vcpu_load() From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Cc: kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Fold the guts of kvm_arch_sched_in() into kvm_arch_vcpu_load(), keying off the recently added @sched_in as appropriate. Note, there is a very slight functional change, as PLE shrink updates will now happen after blasting WBINVD, but that is quite uninteresting. Signed-off-by: Sean Christopherson --- arch/x86/include/asm/kvm-x86-ops.h | 1 - arch/x86/include/asm/kvm_host.h | 4 +--- arch/x86/kvm/svm/svm.c | 13 ++++--------- arch/x86/kvm/vmx/main.c | 2 -- arch/x86/kvm/vmx/vmx.c | 11 ++++------- arch/x86/kvm/vmx/x86_ops.h | 3 +-- arch/x86/kvm/x86.c | 19 +++++++++++-------- 7 files changed, 21 insertions(+), 32 deletions(-) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index 5187fcf4b610..910d06cdb86b 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -103,7 +103,6 @@ KVM_X86_OP(write_tsc_multiplier) KVM_X86_OP(get_exit_info) KVM_X86_OP(check_intercept) KVM_X86_OP(handle_exit_irqoff) -KVM_X86_OP(sched_in) KVM_X86_OP_OPTIONAL(update_cpu_dirty_logging) KVM_X86_OP_OPTIONAL(vcpu_blocking) KVM_X86_OP_OPTIONAL(vcpu_unblocking) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 01c69840647e..9fd1ec82303d 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1624,7 +1624,7 @@ struct kvm_x86_ops { void (*vcpu_reset)(struct kvm_vcpu *vcpu, bool init_event); void (*prepare_switch_to_guest)(struct kvm_vcpu *vcpu); - void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); + void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu, bool sched_in); void (*vcpu_put)(struct kvm_vcpu *vcpu); void (*update_exception_bitmap)(struct kvm_vcpu *vcpu); @@ -1746,8 +1746,6 @@ struct kvm_x86_ops { struct x86_exception *exception); void (*handle_exit_irqoff)(struct kvm_vcpu *vcpu); - void (*sched_in)(struct kvm_vcpu *vcpu, int cpu); - /* * Size of the CPU's dirty log buffer, i.e. VMX's PML buffer. A zero * value indicates CPU dirty logging is unsupported or disabled. diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 0f3b59da0d4a..6d9763dc4fed 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1539,11 +1539,14 @@ static void svm_prepare_host_switch(struct kvm_vcpu *vcpu) to_svm(vcpu)->guest_state_loaded = false; } -static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { struct vcpu_svm *svm = to_svm(vcpu); struct svm_cpu_data *sd = per_cpu_ptr(&svm_data, cpu); + if (sched_in && !kvm_pause_in_guest(vcpu->kvm)) + shrink_ple_window(vcpu); + if (sd->current_vmcb != svm->vmcb) { sd->current_vmcb = svm->vmcb; @@ -4548,12 +4551,6 @@ static void svm_handle_exit_irqoff(struct kvm_vcpu *vcpu) vcpu->arch.at_instruction_boundary = true; } -static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ - if (!kvm_pause_in_guest(vcpu->kvm)) - shrink_ple_window(vcpu); -} - static void svm_setup_mce(struct kvm_vcpu *vcpu) { /* [63:9] are reserved. */ @@ -5013,8 +5010,6 @@ static struct kvm_x86_ops svm_x86_ops __initdata = { .check_intercept = svm_check_intercept, .handle_exit_irqoff = svm_handle_exit_irqoff, - .sched_in = svm_sched_in, - .nested_ops = &svm_nested_ops, .deliver_interrupt = svm_deliver_interrupt, diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c index 7c546ad3e4c9..4fee9a8cc5a1 100644 --- a/arch/x86/kvm/vmx/main.c +++ b/arch/x86/kvm/vmx/main.c @@ -121,8 +121,6 @@ struct kvm_x86_ops vt_x86_ops __initdata = { .check_intercept = vmx_check_intercept, .handle_exit_irqoff = vmx_handle_exit_irqoff, - .sched_in = vmx_sched_in, - .cpu_dirty_log_size = PML_ENTITY_NUM, .update_cpu_dirty_logging = vmx_update_cpu_dirty_logging, diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index cb36db7b6140..ccea594187c7 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1505,10 +1505,13 @@ void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, * Switches to specified vcpu, until a matching vcpu_put(), but assumes * vcpu mutex is already taken. */ -void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { struct vcpu_vmx *vmx = to_vmx(vcpu); + if (sched_in && !kvm_pause_in_guest(vcpu->kvm)) + shrink_ple_window(vcpu); + vmx_vcpu_load_vmcs(vcpu, cpu, NULL); vmx_vcpu_pi_load(vcpu, cpu); @@ -8093,12 +8096,6 @@ void vmx_cancel_hv_timer(struct kvm_vcpu *vcpu) } #endif -void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ - if (!kvm_pause_in_guest(vcpu->kvm)) - shrink_ple_window(vcpu); -} - void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); diff --git a/arch/x86/kvm/vmx/x86_ops.h b/arch/x86/kvm/vmx/x86_ops.h index 502704596c83..b7104a5f623e 100644 --- a/arch/x86/kvm/vmx/x86_ops.h +++ b/arch/x86/kvm/vmx/x86_ops.h @@ -23,7 +23,7 @@ int vmx_vcpu_pre_run(struct kvm_vcpu *vcpu); fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu, bool force_immediate_exit); void vmx_vcpu_free(struct kvm_vcpu *vcpu); void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); -void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu); +void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in); void vmx_vcpu_put(struct kvm_vcpu *vcpu); int vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath); void vmx_handle_exit_irqoff(struct kvm_vcpu *vcpu); @@ -112,7 +112,6 @@ u64 vmx_get_l2_tsc_multiplier(struct kvm_vcpu *vcpu); void vmx_write_tsc_offset(struct kvm_vcpu *vcpu); void vmx_write_tsc_multiplier(struct kvm_vcpu *vcpu); void vmx_request_immediate_exit(struct kvm_vcpu *vcpu); -void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu); void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu); #ifdef CONFIG_X86_64 int vmx_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc, diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 925cadb18b55..9b0a21f2e56e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5005,6 +5005,16 @@ static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) { + struct kvm_pmu *pmu = vcpu_to_pmu(vcpu); + + if (sched_in) { + vcpu->arch.l1tf_flush_l1d = true; + if (pmu->version && unlikely(pmu->event_count)) { + pmu->need_cleanup = true; + kvm_make_request(KVM_REQ_PMU, vcpu); + } + } + /* Address WBINVD may be executed by guest */ if (need_emulate_wbinvd(vcpu)) { if (static_call(kvm_x86_has_wbinvd_exit)()) @@ -5014,7 +5024,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in) wbinvd_ipi, NULL, 1); } - static_call(kvm_x86_vcpu_load)(vcpu, cpu); + static_call(kvm_x86_vcpu_load)(vcpu, cpu, sched_in); /* Save host pkru register if supported */ vcpu->arch.host_pkru = read_pkru(); @@ -12569,14 +12579,7 @@ bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) { - struct kvm_pmu *pmu = vcpu_to_pmu(vcpu); - vcpu->arch.l1tf_flush_l1d = true; - if (pmu->version && unlikely(pmu->event_count)) { - pmu->need_cleanup = true; - kvm_make_request(KVM_REQ_PMU, vcpu); - } - static_call(kvm_x86_sched_in)(vcpu, cpu); } void kvm_arch_free_vm(struct kvm *kvm) From patchwork Tue Apr 30 19:31:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 1929819 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; 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Tue, 30 Apr 2024 12:32:08 -0700 (PDT) Date: Tue, 30 Apr 2024 12:31:57 -0700 In-Reply-To: <20240430193157.419425-1-seanjc@google.com> Mime-Version: 1.0 References: <20240430193157.419425-1-seanjc@google.com> X-Mailer: git-send-email 2.45.0.rc0.197.gbae5840b3b-goog Message-ID: <20240430193157.419425-5-seanjc@google.com> Subject: [PATCH 4/4] KVM: Delete the now unused kvm_arch_sched_in() From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Cc: kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Delete kvm_arch_sched_in() now that all implementations are nops. Signed-off-by: Sean Christopherson --- arch/arm64/include/asm/kvm_host.h | 1 - arch/loongarch/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 | 1 - arch/x86/kvm/pmu.c | 6 +++--- arch/x86/kvm/x86.c | 5 ----- include/linux/kvm_host.h | 2 -- virt/kvm/kvm_main.c | 1 - 10 files changed, 3 insertions(+), 17 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 9e8a496fb284..a12d3bb0b590 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1180,7 +1180,6 @@ static inline bool kvm_system_needs_idmapped_vectors(void) } static inline void kvm_arch_sync_events(struct kvm *kvm) {} -static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} void kvm_arm_init_debug(void); void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu); diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h index 69305441f40d..64ca60a3ce24 100644 --- a/arch/loongarch/include/asm/kvm_host.h +++ b/arch/loongarch/include/asm/kvm_host.h @@ -228,7 +228,6 @@ static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *arch) static inline void kvm_arch_hardware_unsetup(void) {} static inline void kvm_arch_sync_events(struct kvm *kvm) {} 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) {} diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 179f320cc231..6743a57c1ab4 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -890,7 +890,6 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {} 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) {} diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 8abac532146e..c4fb6a27fb92 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -897,7 +897,6 @@ struct kvm_vcpu_arch { static inline void kvm_arch_sync_events(struct kvm *kvm) {} 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_vcpu_blocking(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 484d04a92fa6..6cd7a576ef14 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -272,7 +272,6 @@ struct kvm_vcpu_arch { }; static inline void kvm_arch_sync_events(struct kvm *kvm) {} -static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} #define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12 diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 95990461888f..e9fcaf4607a6 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -1045,7 +1045,6 @@ extern int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc); extern int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc); 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_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) {} static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {} diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index c397b28e3d1b..75346a588e13 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -521,9 +521,9 @@ void kvm_pmu_handle_event(struct kvm_vcpu *vcpu) } /* - * Unused perf_events are only released if the corresponding MSRs - * weren't accessed during the last vCPU time slice. kvm_arch_sched_in - * triggers KVM_REQ_PMU if cleanup is needed. + * Release unused perf_events if the corresponding guest MSRs weren't + * accessed during the last vCPU time slice (need_cleanup is set when + * the vCPU is scheduled back in). */ if (unlikely(pmu->need_cleanup)) kvm_pmu_cleanup(vcpu); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9b0a21f2e56e..17d6ce0d4fa6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -12577,11 +12577,6 @@ bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; } -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) -{ - -} - void kvm_arch_free_vm(struct kvm *kvm) { #if IS_ENABLED(CONFIG_HYPERV) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 2f5e35eb7eab..85b6dd7927fe 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1496,8 +1496,6 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg); int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu); -void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); - void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu, bool sched_in); void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4a4b29a9bace..b154b22a3b84 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -6278,7 +6278,6 @@ static void kvm_sched_in(struct preempt_notifier *pn, int cpu) WRITE_ONCE(vcpu->ready, false); __this_cpu_write(kvm_running_vcpu, vcpu); - kvm_arch_sched_in(vcpu, cpu); kvm_arch_vcpu_load(vcpu, cpu, true); }