From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sean Christopherson <sean.j.christopherson@intel.com>
Date: Tue, 22 Oct 2019 18:41:39 +0000
Subject: Re: [PATCH 42/45] KVM: arm64: Free sve_state via arm specific hook
Message-Id: <20191022184139.GK2343@linux.intel.com>
List-Id: <kvm-ppc.vger.kernel.org>
References: <20191022015925.31916-1-sean.j.christopherson@intel.com>
 <20191022015925.31916-43-sean.j.christopherson@intel.com>
 <20191022114342.GB2652@e113682-lin.lund.arm.com>
In-Reply-To: <20191022114342.GB2652@e113682-lin.lund.arm.com>
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To: Christoffer Dall <christoffer.dall@arm.com>
Cc: Marc Zyngier <maz@kernel.org>, James Hogan <jhogan@kernel.org>, Paul Mackerras <paulus@ozlabs.org>, Christian Borntraeger <borntraeger@de.ibm.com>, Janosch Frank <frankja@linux.ibm.com>, Paolo Bonzini <pbonzini@redhat.com>, Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>, kvm-ppc@vger.kernel.org, Wanpeng Li <wanpengli@tencent.com>, kvm@vger.kernel.org, David Hildenbrand <david@redhat.com>, Joerg Roedel <joro@8bytes.org>, Cornelia Huck <cohuck@redhat.com>, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Vitaly Kuznetsov <vkuznets@redhat.com>, kvmarm@lists.cs.columbia.edu, Jim Mattson <jmattson@google.com>

On Tue, Oct 22, 2019 at 01:43:42PM +0200, Christoffer Dall wrote:
> On Mon, Oct 21, 2019 at 06:59:22PM -0700, Sean Christopherson wrote:
> > Add an arm specific hook to free the arm64-only sve_state.  Doing so
> > eliminates the last functional code from kvm_arch_vcpu_uninit() across
> > all architectures and paves the way for removing kvm_arch_vcpu_init()
> > and kvm_arch_vcpu_uninit() entirely.
> > 
> > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> > ---
> >  arch/arm/include/asm/kvm_host.h   | 1 +
> >  arch/arm64/include/asm/kvm_host.h | 1 +
> >  arch/arm64/kvm/reset.c            | 5 +++++
> >  virt/kvm/arm/arm.c                | 2 ++
> >  4 files changed, 9 insertions(+)
> > 
> > diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
> > index 8a37c8e89777..cc414de5acd3 100644
> > --- a/arch/arm/include/asm/kvm_host.h
> > +++ b/arch/arm/include/asm/kvm_host.h
> > @@ -333,6 +333,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
> >  static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
> >  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
> >  static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
> > +static inline int kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu) {}
> >  
> >  static inline void kvm_arm_init_debug(void) {}
> >  static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
> > diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> > index f656169db8c3..92d7c384a4ed 100644
> > --- a/arch/arm64/include/asm/kvm_host.h
> > +++ b/arch/arm64/include/asm/kvm_host.h
> > @@ -52,6 +52,7 @@ int kvm_arm_init_sve(void);
> >  
> >  int __attribute_const__ kvm_target_cpu(void);
> >  int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
> > +int kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu);
> >  void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
> >  int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext);
> >  void __extended_idmap_trampoline(phys_addr_t boot_pgd, phys_addr_t idmap_start);
> > diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
> > index f4a8ae918827..98abc4278f42 100644
> > --- a/arch/arm64/kvm/reset.c
> > +++ b/arch/arm64/kvm/reset.c
> > @@ -205,6 +205,11 @@ bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu)
> >  }
> >  
> >  void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
> > +{
> > +
> > +}
> > +
> > +int kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu)
> >  {
> >  	kfree(vcpu->arch.sve_state);
> >  }
> 
> nit: warning: control reaches end of non-void function

Doh, fixed.  Thanks for the quick review!