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Subject: Re: [PATCH 03/12] x86/xen: Introduce new function to map
 HYPERVISOR_shared_info on Resume
To:     Anchal Agarwal <anchalag@amazon.com>
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From:   Boris Ostrovsky <boris.ostrovsky@oracle.com>
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Date:   Mon, 8 Jun 2020 14:49:54 -0400
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Sender: linux-kernel-owner@vger.kernel.org
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On 6/8/20 12:52 PM, Anchal Agarwal wrote:
>
>>>>> +void xen_hvm_map_shared_info(void)
>>>>> +{
>>>>> +     xen_hvm_init_shared_info();
>>>>> +     if (shared_info_pfn)
>>>>> +             HYPERVISOR_shared_info = __va(PFN_PHYS(shared_info_pfn));
>>>>> +}
>>>>> +
>>>> AFAICT it is only called once so I don't see a need for new routine.
>>>>
>>>>
>>> HYPERVISOR_shared_info can only be mapped in this scope without refactoring
>>> much of the code.
>>
>> Refactoring what? All am suggesting is
>>
> shared_info_pfn does not seem to be in scope here, it's scope is limited
> to enlighten_hvm.c. That's the reason I introduced a new function there.


OK, that's a good point.


-boris