Re: [PATCH] s390x/pci: reset ISM passthrough devices on shutdown and system reset

On Fri, 2022-12-09 at 14:57 -0500, Matthew Rosato wrote: > ISM device firmware stores unique state information that can > can cause a wholesale unmap of the associated IOMMU (e.g. when > we get a termination signal for QEMU) to trigger firmware errors > because firmware believes we are attempting t

Re: [PATCH] s390x/pci: reset ISM passthrough devices on shutdown and system reset

On 12/12/22 6:34 AM, Thomas Huth wrote: > On 09/12/2022 20.57, Matthew Rosato wrote: >> ISM device firmware stores unique state information that can >> can cause a wholesale unmap of the associated IOMMU (e.g. when >> we get a termination signal for QEMU) to trigger firmware errors >> because firmw

Re: [PATCH] s390x/pci: reset ISM passthrough devices on shutdown and system reset

On 09/12/2022 20.57, Matthew Rosato wrote: ISM device firmware stores unique state information that can can cause a wholesale unmap of the associated IOMMU (e.g. when we get a termination signal for QEMU) to trigger firmware errors because firmware believes we are attempting to invalidate entries

[PATCH] s390x/pci: reset ISM passthrough devices on shutdown and system reset

ISM device firmware stores unique state information that can can cause a wholesale unmap of the associated IOMMU (e.g. when we get a termination signal for QEMU) to trigger firmware errors because firmware believes we are attempting to invalidate entries that are still in-use by the guest OS (when