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Date: Thu, 1 Apr 2021 16:31:39 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org Cc: "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>, Jim Mattson <jmattson@...gle.com>, Vitaly Kuznetsov <vkuznets@...hat.com>, Wanpeng Li <wanpengli@...cent.com>, Sean Christopherson <seanjc@...gle.com>, Joerg Roedel <joro@...tes.org>, "H. Peter Anvin" <hpa@...or.com>, "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, Jonathan Corbet <corbet@....net>, Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>, "open list:DOCUMENTATION" <linux-doc@...r.kernel.org> Subject: Re: [PATCH 3/6] KVM: x86: introduce kvm_register_clear_available On 01/04/21 16:18, Maxim Levitsky wrote: > Small refactoring that will be used in the next patch. > > Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com> > --- > arch/x86/kvm/kvm_cache_regs.h | 7 +++++++ > arch/x86/kvm/svm/svm.c | 6 ++---- > 2 files changed, 9 insertions(+), 4 deletions(-) > > diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h > index 2e11da2f5621..07d607947805 100644 > --- a/arch/x86/kvm/kvm_cache_regs.h > +++ b/arch/x86/kvm/kvm_cache_regs.h > @@ -55,6 +55,13 @@ static inline void kvm_register_mark_available(struct kvm_vcpu *vcpu, > __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); > } > > +static inline void kvm_register_clear_available(struct kvm_vcpu *vcpu, > + enum kvm_reg reg) > +{ > + __clear_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); > + __clear_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty); > +} > + > static inline void kvm_register_mark_dirty(struct kvm_vcpu *vcpu, > enum kvm_reg reg) > { > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c > index 271196400495..2843732299a2 100644 > --- a/arch/x86/kvm/svm/svm.c > +++ b/arch/x86/kvm/svm/svm.c > @@ -3880,10 +3880,8 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu) > vcpu->arch.apf.host_apf_flags = > kvm_read_and_reset_apf_flags(); > > - if (npt_enabled) { > - vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); > - vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); > - } > + if (npt_enabled) > + kvm_register_clear_available(vcpu, VCPU_EXREG_PDPTR); > > /* > * We need to handle MC intercepts here before the vcpu has a chance to > Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
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