linux-kernel - Re: [PATCH v2] KVM: VMX: drop I/O permission bitmaps

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Date:   Tue, 12 Dec 2017 17:10:25 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, Quan Xu <quan.xu0@...il.com>,
        kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, rkrcmar@...hat.com,
        jmattson@...gle.com
Subject: Re: [PATCH v2] KVM: VMX: drop I/O permission bitmaps


>  	/*
> -	 * Merging of IO bitmap not currently supported.
> -	 * Rather, exit every time.
> +	 * A vmexit (to either L1 hypervisor or L0 userspace) is always needed
> +	 * for I/O port accesses.
>  	 */
>  	exec_control &= ~CPU_BASED_USE_IO_BITMAPS;
>  	exec_control |= CPU_BASED_UNCOND_IO_EXITING;
> 
> Thanks,
> 
> Paolo
> 

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 

Thanks,

David / dhildenb