linux-kernel - Re: [PATCH 1/6] kvm/x86/svm: force new asid on vcpu migration

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Message-ID: <4A6C7504.40800@redhat.com>
Date:	Sun, 26 Jul 2009 18:23:48 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Joerg Roedel <joerg.roedel@....com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] kvm/x86/svm: force new asid on vcpu migration

On 03/05/2009 02:12 PM, Joerg Roedel wrote:
> Signed-off-by: Joerg Roedel<joerg.roedel@....com>
> ---
>   arch/x86/kvm/svm.c |    3 ++-
>   1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 1821c20..0e66bca 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -180,7 +180,7 @@ static inline void kvm_write_cr2(unsigned long val)
>
>   static inline void force_new_asid(struct kvm_vcpu *vcpu)
>   {
> -	to_svm(vcpu)->asid_generation--;
> +	to_svm(vcpu)->asid_generation = 0;
>   }
>
>   static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
> @@ -716,6 +716,7 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
>   		svm->vmcb->control.tsc_offset += delta;
>   		vcpu->cpu = cpu;
>   		kvm_migrate_timers(vcpu);
> +		force_new_asid(vcpu);
>   	}
>
>   	for (i = 0; i<  NR_HOST_SAVE_USER_MSRS; i++)
>    

Does this remove the need for 6eaa802c ("KVM: SVM: fix random segfaults 
with NPT enabled")?

-- 
error compiling committee.c: too many arguments to function

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