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Message-ID: <87o8tsrqmj.fsf@vitty.brq.redhat.com>
Date: Fri, 21 Feb 2020 14:56:04 +0100
From: Vitaly Kuznetsov <vkuznets@...hat.com>
To: Sean Christopherson <sean.j.christopherson@...el.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] KVM: x86: Drop @invalidate_gpa param from kvm_x86_ops' tlb_flush()
Sean Christopherson <sean.j.christopherson@...el.com> writes:
> Drop @invalidate_gpa from ->tlb_flush() and kvm_vcpu_flush_tlb() now
> that all callers pass %true for said param.
>
> Note, vmx_flush_tlb() now unconditionally passes %true to
> __vmx_flush_tlb(), the less straightforward VMX change will be handled
> in a future patch.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> ---
> arch/x86/include/asm/kvm_host.h | 2 +-
> arch/x86/kvm/mmu/mmu.c | 2 +-
> arch/x86/kvm/svm.c | 10 +++++-----
> arch/x86/kvm/vmx/vmx.c | 4 ++--
> arch/x86/kvm/vmx/vmx.h | 4 ++--
> arch/x86/kvm/x86.c | 6 +++---
> 6 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 86aed64b9a88..2d5ef0081d50 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1095,7 +1095,7 @@ struct kvm_x86_ops {
> unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
> void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
>
> - void (*tlb_flush)(struct kvm_vcpu *vcpu, bool invalidate_gpa);
> + void (*tlb_flush)(struct kvm_vcpu *vcpu);
> int (*tlb_remote_flush)(struct kvm *kvm);
> int (*tlb_remote_flush_with_range)(struct kvm *kvm,
> struct kvm_tlb_range *range);
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 7011a4e54866..7fefe58dd7ab 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -5186,7 +5186,7 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
> if (r)
> goto out;
> kvm_mmu_load_cr3(vcpu);
> - kvm_x86_ops->tlb_flush(vcpu, true);
> + kvm_x86_ops->tlb_flush(vcpu);
> out:
> return r;
> }
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index e549811f51c6..16d58ffc7aff 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -385,7 +385,7 @@ module_param(dump_invalid_vmcb, bool, 0644);
> static u8 rsm_ins_bytes[] = "\x0f\xaa";
>
> static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
> -static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa);
> +static void svm_flush_tlb(struct kvm_vcpu *vcpu);
> static void svm_complete_interrupts(struct vcpu_svm *svm);
> static void svm_toggle_avic_for_irq_window(struct kvm_vcpu *vcpu, bool activate);
> static inline void avic_post_state_restore(struct kvm_vcpu *vcpu);
> @@ -2634,7 +2634,7 @@ static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
> return 1;
>
> if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
> - svm_flush_tlb(vcpu, true);
> + svm_flush_tlb(vcpu);
>
> vcpu->arch.cr4 = cr4;
> if (!npt_enabled)
> @@ -3588,7 +3588,7 @@ static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
> svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
> svm->nested.intercept = nested_vmcb->control.intercept;
>
> - svm_flush_tlb(&svm->vcpu, true);
> + svm_flush_tlb(&svm->vcpu);
> svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
> if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
> svm->vcpu.arch.hflags |= HF_VINTR_MASK;
> @@ -5591,7 +5591,7 @@ static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
> return 0;
> }
>
> -static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
> +static void svm_flush_tlb(struct kvm_vcpu *vcpu)
> {
> struct vcpu_svm *svm = to_svm(vcpu);
>
> @@ -5610,7 +5610,7 @@ static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
>
> static void svm_flush_tlb_guest(struct kvm_vcpu *vcpu)
> {
> - svm_flush_tlb(vcpu, true);
> + svm_flush_tlb(vcpu);
> }
>
> static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 906e9d9aa09e..8bb380d22dc2 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -6043,7 +6043,7 @@ void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
> if (flexpriority_enabled) {
> sec_exec_control |=
> SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
> - vmx_flush_tlb(vcpu, true);
> + vmx_flush_tlb(vcpu);
> }
> break;
> case LAPIC_MODE_X2APIC:
> @@ -6061,7 +6061,7 @@ static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu, hpa_t hpa)
> {
> if (!is_guest_mode(vcpu)) {
> vmcs_write64(APIC_ACCESS_ADDR, hpa);
> - vmx_flush_tlb(vcpu, true);
> + vmx_flush_tlb(vcpu);
> }
> }
>
> diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
> index 7f42cf3dcd70..6e588d238318 100644
> --- a/arch/x86/kvm/vmx/vmx.h
> +++ b/arch/x86/kvm/vmx/vmx.h
> @@ -514,9 +514,9 @@ static inline void __vmx_flush_tlb(struct kvm_vcpu *vcpu, int vpid,
> }
> }
>
> -static inline void vmx_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
> +static inline void vmx_flush_tlb(struct kvm_vcpu *vcpu)
> {
> - __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid, invalidate_gpa);
> + __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid, true);
> }
>
> static inline void decache_tsc_multiplier(struct vcpu_vmx *vmx)
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 72f7ca4baa6d..e26ffebe6f6e 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -2646,10 +2646,10 @@ static void kvmclock_reset(struct kvm_vcpu *vcpu)
> vcpu->arch.time = 0;
> }
>
> -static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
> +static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu)
> {
> ++vcpu->stat.tlb_flush;
> - kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa);
> + kvm_x86_ops->tlb_flush(vcpu);
> }
>
> static void record_steal_time(struct kvm_vcpu *vcpu)
> @@ -8166,7 +8166,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> if (kvm_check_request(KVM_REQ_LOAD_CR3, vcpu))
> kvm_mmu_load_cr3(vcpu);
> if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
> - kvm_vcpu_flush_tlb(vcpu, true);
> + kvm_vcpu_flush_tlb(vcpu);
> if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
> vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
> r = 0;
Reviewed-by: Vitaly Kuznetsov <vkuznets@...hat.com>
--
Vitaly
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