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Re: [Xen-devel] [PATCH 1/2] adjust special domain creation (and call it earlier on x86)
- To: Jan Beulich <JBeulich@xxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 31 May 2019 09:02:01 -0700
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, WeiLiu <wl@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 31 May 2019 16:02:18 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 31/05/2019 08:59, Jan Beulich wrote:
>
>>> +#ifdef CONFIG_HAS_PCI
>>> + INIT_LIST_HEAD(&dom_xen->arch.pdev_list);
>>> +#endif
>> The position of this identifies that we've got obviously got bugs
>> (perhaps latent) elsewhere, seeing as other special domains don't get
>> working constructs such as list_empty().
>>
>> In the code which currently exists, I can't spot it ever being touched
>> for ARM, but it is constructed for all non-special x86 guests at the top
>> of arch_domain_create().
>>
>> I think the best option, given the #ifdef here, is to reposition the
>> pdev fields into struct domain, rather than arch_domain, and have this
>> code fragment near the top of domain_create() where special domains will
>> all be covered.
> Except that if I do this, then not by special casing special domains.
What special casing? There is a block of code near the start of
domain_create() which is run for all domain, including special ones.
~Andrew
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