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Re: [PATCH v9 11/15] s390x: protvirt: Disable address checks for PV gues


From: Christian Borntraeger
Subject: Re: [PATCH v9 11/15] s390x: protvirt: Disable address checks for PV guest IO emulation
Date: Thu, 12 Mar 2020 17:10:31 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0


On 12.03.20 17:07, Janosch Frank wrote:
> On 3/12/20 4:41 PM, Christian Borntraeger wrote:
>> On 11.03.20 14:21, Janosch Frank wrote:
>>> IO instruction data is routed through SIDAD for protected guests, so
>>> adresses do not need to be checked, as this is kernel memory.
>>
>> Maybe also mention that the data structures for  the I/O instrutions
>> start at offset 0 of the SIDA?
> 
> You mean in the comment for get_address_from_regs() or in the commit
> message? It would certainly make sense for get_address_from_regs().

Maybe both?




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