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Re: [PATCH] s390x/s390-virtio-ccw: Reset PCI devices during subsystem re


From: Christian Borntraeger
Subject: Re: [PATCH] s390x/s390-virtio-ccw: Reset PCI devices during subsystem reset
Date: Thu, 15 Oct 2020 15:32:56 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0


On 15.10.20 15:16, Matthew Rosato wrote:
> Currently, a subsystem reset event leaves PCI devices enabled, causing
> issues post-reset in the guest (an example would be after a kexec).  These
> devices need to be reset during a subsystem reset, allowing them to be
> properly re-enabled afterwards.  Add the S390 PCI host bridge to the list
> of qdevs to be reset during subsystem reset.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> Reviewed-by: Eric Farman <farman@linux.ibm.com>

Makese sense. 
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>


> ---
>  hw/s390x/s390-virtio-ccw.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
> index e52182f..2e90033 100644
> --- a/hw/s390x/s390-virtio-ccw.c
> +++ b/hw/s390x/s390-virtio-ccw.c
> @@ -101,6 +101,7 @@ static const char *const reset_dev_types[] = {
>      "s390-sclp-event-facility",
>      "s390-flic",
>      "diag288",
> +    TYPE_S390_PCI_HOST_BRIDGE,
>  };
>  
>  static void subsystem_reset(void)
> 



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