lkml.org 
[lkml]   [2020]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 57/61] KVM: x86/mmu: Merge kvm_{enable,disable}_tdp() into a common function
Date
Sean Christopherson <sean.j.christopherson@intel.com> writes:

> Combine kvm_enable_tdp() and kvm_disable_tdp() into a single function,
> kvm_configure_mmu(), in preparation for doing additional configuration
> during hardware setup. And because having separate helpers is silly.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> ---
> arch/x86/include/asm/kvm_host.h | 3 +--
> arch/x86/kvm/mmu/mmu.c | 13 +++----------
> arch/x86/kvm/svm.c | 5 +----
> arch/x86/kvm/vmx/vmx.c | 4 +---
> 4 files changed, 6 insertions(+), 19 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index a8bae9d88bce..1a13a53bbaeb 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1494,8 +1494,7 @@ void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
> void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid);
> void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu, gpa_t new_cr3, bool skip_tlb_flush);
>
> -void kvm_enable_tdp(void);
> -void kvm_disable_tdp(void);
> +void kvm_configure_mmu(bool enable_tdp);
>
> static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
> struct x86_exception *exception)
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 84eeb61d06aa..08c80c7c88d4 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -5541,18 +5541,11 @@ void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid)
> }
> EXPORT_SYMBOL_GPL(kvm_mmu_invpcid_gva);
>
> -void kvm_enable_tdp(void)
> +void kvm_configure_mmu(bool enable_tdp)
> {
> - tdp_enabled = true;
> + tdp_enabled = enable_tdp;
> }
> -EXPORT_SYMBOL_GPL(kvm_enable_tdp);
> -
> -void kvm_disable_tdp(void)
> -{
> - tdp_enabled = false;
> -}
> -EXPORT_SYMBOL_GPL(kvm_disable_tdp);
> -
> +EXPORT_SYMBOL_GPL(kvm_configure_mmu);
>
> /* The return value indicates if tlb flush on all vcpus is needed. */
> typedef bool (*slot_level_handler) (struct kvm *kvm, struct kvm_rmap_head *rmap_head);
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 80962c1eea8f..19dc74ae1efb 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -1443,10 +1443,7 @@ static __init int svm_hardware_setup(void)
> if (npt_enabled && !npt)
> npt_enabled = false;
>
> - if (npt_enabled)
> - kvm_enable_tdp();
> - else
> - kvm_disable_tdp();
> + kvm_configure_mmu(npt_enabled);
> pr_info("kvm: Nested Paging %sabled\n", npt_enabled ? "en" : "dis");
>
> if (nrips) {
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index e6284b6aac56..59206c22b5e1 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -5295,7 +5295,6 @@ static void vmx_enable_tdp(void)
> VMX_EPT_RWX_MASK, 0ull);
>
> ept_set_mmio_spte_mask();
> - kvm_enable_tdp();
> }
>
> /*
> @@ -7678,8 +7677,7 @@ static __init int hardware_setup(void)
>
> if (enable_ept)
> vmx_enable_tdp();
> - else
> - kvm_disable_tdp();
> + kvm_configure_mmu(enable_ept);
>
> /*
> * Only enable PML when hardware supports PML feature, and both EPT

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

--
Vitaly

\
 
 \ /
  Last update: 2020-02-25 15:28    [W:4.015 / U:0.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site