NEWS: mention disabling deprecated features by default on s390 CPU models

[PATCH] NEWS: mention disabling deprecated features by default on s390 CPU models

Posted by Collin Walling 1 month, 2 weeks ago

Signed-off-by: Collin Walling <walling@linux.ibm.com>
---
 NEWS.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/NEWS.rst b/NEWS.rst
index e5e8626729..6cc8f23225 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -32,6 +32,14 @@ v11.6.0 (unreleased)
     that is liable to cause crashes of the source QEMU when performing long
     running live migration operations with TLS enabled.
 
+  * Add support for disabling deprecated CPU model features by default for s390 domains
+
+    Starting an s390 domain with host-model will now default to setting the
+    ``deprecated_features`` attribute to ``off``, ensuring the domain starts
+    with a migration-compatible CPU model to newer systems. This behavior can
+    be modified by setting the ``default_cpu_deprecated_features`` option in
+    the qemu.conf file.
+
 * **Improvements**
 
   * qemu: Change default SCSI controller model to ``virtio-scsi`` for ARM and RISC-V
-- 
2.49.0

Re: [PATCH] NEWS: mention disabling deprecated features by default on s390 CPU models

Posted by Jiri Denemark via Devel 1 month, 2 weeks ago

On Thu, Jul 24, 2025 at 14:36:23 -0400, Collin Walling wrote:
> Signed-off-by: Collin Walling <walling@linux.ibm.com>
> ---
>  NEWS.rst | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/NEWS.rst b/NEWS.rst
> index e5e8626729..6cc8f23225 100644
> --- a/NEWS.rst
> +++ b/NEWS.rst
> @@ -32,6 +32,14 @@ v11.6.0 (unreleased)
>      that is liable to cause crashes of the source QEMU when performing long
>      running live migration operations with TLS enabled.
>  
> +  * Add support for disabling deprecated CPU model features by default for s390 domains
> +
> +    Starting an s390 domain with host-model will now default to setting the
> +    ``deprecated_features`` attribute to ``off``, ensuring the domain starts
> +    with a migration-compatible CPU model to newer systems. This behavior can
> +    be modified by setting the ``default_cpu_deprecated_features`` option in
> +    the qemu.conf file.
> +
>  * **Improvements**
>  
>    * qemu: Change default SCSI controller model to ``virtio-scsi`` for ARM and RISC-V
> -- 
> 2.49.0
> 

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>