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Re: [Xen-devel] [PATCH 2/2] x86/cpuid: Alter the policy logic for leaf 0xb to be multi-invocation
- To: Wei Liu <wei.liu2@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 27 Jun 2018 17:01:31 +0100
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 27 Jun 2018 16:02:22 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 27/06/18 17:00, Wei Liu wrote:
> On Wed, Jun 27, 2018 at 04:58:08PM +0100, Andrew Cooper wrote:
>> On 27/06/18 15:58, Jan Beulich wrote:
>>>>>> On 27.06.18 at 15:55, <andrew.cooper3@xxxxxxxxxx> wrote:
>>>> @@ -316,6 +319,33 @@ static void __init calculate_raw_policy(void)
>>>> cpuid_count_leaf(7, i, &p->feat.raw[i]);
>>>> }
>>>>
>>>> + if ( p->basic.max_leaf >= 0xb )
>>>> + {
>>>> + union {
>>>> + struct cpuid_leaf l;
>>>> + struct cpuid_topo_leaf t;
>>>> + } u;
>>>> +
>>>> + for ( i = 0; i < ARRAY_SIZE(p->topo.raw); ++i )
>>>> + {
>>>> + cpuid_count_leaf(0xb, i, &u.l);
>>>> +
>>>> + if ( u.t.type == 0 )
>>>> + break;
>>>> +
>>>> + p->topo.subleaf[i] = u.t;
>>>> + }
>>>> +
>>>> + /*
>>>> + * The choice of CPUID_GUEST_NR_TOPO is per the manual. It may
>>>> need
>>>> + * to grow for future harware.
>>> Missing d.
>> Where? I'm afraid that after repeated re-reads, I can't spot any issue.
>>
> har d ware. ;p
Wow I'm blind. Thanks.
~Andrew
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