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Re: [PATCH v2 1/2] KVM: nVMX: enhance allocate/free_vpid to handle shadow vpid

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On 15/09/2015 12:30, Wanpeng Li wrote:
> +	if (!nested) {
> +		vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
> +		if (vpid < VMX_NR_VPIDS) {
>  		vmx->vpid = vpid;
>  		__set_bit(vpid, vmx_vpid_bitmap);
> +		}
> +	} else {
> +		vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
> +		if (vpid < VMX_NR_VPIDS) {
> +			vmx->nested.vpid02 = vpid;
> +			__set_bit(vpid, vmx_vpid_bitmap);
> +		}

Messy indentation, and a lot of duplicate code.  Can you instead have
(which I think was Jan's suggestion too):

static int allocate_vpid(void);
static void free_vpid(int vpid);

That said, I like the simple solution to the "too many VPIDs for each L1
VCPU" processor.

Paolo
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[PATCH v2 1/2] KVM: nVMX: enhance allocate/free_vpid to handle shadow  vpid Wanpeng Li <wanpeng.li@hotmail.com> - 2015-09-15 12:40 +0200
  Re: [PATCH v2 1/2] KVM: nVMX: enhance allocate/free_vpid to handle  shadow vpid Paolo Bonzini <pbonzini@redhat.com> - 2015-09-15 15:00 +0200
    Re: [PATCH v2 1/2] KVM: nVMX: enhance allocate/free_vpid to handle  shadow vpid Wanpeng Li <wanpeng.li@hotmail.com> - 2015-09-16 06:00 +0200

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