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Re: [Xen-devel] [PATCH] x86: Fix boot with CONFIG_XSM enabled following c/s 7177f589ba
- To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 7 Jun 2019 15:38:11 +0100
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- Cc: WeiLiu <wl@xxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Fri, 07 Jun 2019 14:38:33 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 07/06/2019 14:13, Jan Beulich wrote:
>>>> On 07.06.19 at 14:20, <andrew.cooper3@xxxxxxxxxx> wrote:
>> "adjust system domain creation (and call it earlier on x86)" didn't account
>> for the fact that domain_create() depends on XSM already being set up.
>>
>> Therefore, domain_create() follows xsm_ops->alloc_security_domain() which is
>> offset 0 from a NULL pointer, meaning that we execute the 16bit IVT until
>> happening to explode in __x86_indirect_thunk_rax().
>>
>> There is nothing very interesting which xsm_multiboot_init() more than
>> allocating memory, which means it is safe to move earlier during setup.
> The last sentence looks somewhat odd to me (the "which" in particular).
> Perhaps you could rephrase that?
Oops - I meant "very interesting that xsm_multiboot_init() does more"
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Thanks.
~Andrew
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