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Re: [PATCH] s390x: kvm: adjust diag318 resets to retain data

From: Collin Walling
Subject: Re: [PATCH] s390x: kvm: adjust diag318 resets to retain data
Date: Mon, 8 Nov 2021 12:36:31 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0

On 11/8/21 12:02, Janosch Frank wrote:
> On 11/5/21 23:46, Collin Walling wrote:
>> The CPNC portion of the diag 318 data is erroneously reset during an
>> initial CPU reset caused by SIGP. Let's go ahead and relocate the
>> diag318_info field within the CPUS390XState struct such that it is
>> only zeroed during a clear reset. This way, the CPNC will be retained
>> for each VCPU in the configuration after the diag 318 instruction
>> has been invoked by the kernel.
>> Additionally, the diag 318 data reset is handled via the CPU reset
>> code. The set_diag318 code can be merged into the handler function
>> and the helper functions can consequently be removed.
>> Signed-off-by: Collin Walling <walling@linux.ibm.com>
> Fixes tag?

Will include this on v2 post. Thank you.



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