[v1] virtio,pc,pci: features, fixes

[PULL 18/33] hw/cxl: Update CXL Fixed Memory Window ACPI description to include Back Invalidate support.

Michael S. Tsirkin posted 33 patches 1 month, 2 weeks ago

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Maintainers: "Michael S. Tsirkin" <mst@redhat.com>, Stefano Garzarella <sgarzare@redhat.com>, Pierrick Bouvier <pierrick.bouvier@linaro.org>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, Manos Pitsidianakis <manos.pitsidianakis@linaro.org>, Jonathan Cameron <jonathan.cameron@huawei.com>, Fan Ni <fan.ni@samsung.com>, "Alex Bennée" <alex.bennee@linaro.org>, Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>, Dmitry Osipenko <dmitry.osipenko@collabora.com>, Jason Wang <jasowang@redhat.com>, Yi Liu <yi.l.liu@intel.com>, "Clément Mathieu--Drif" <clement.mathieu--drif@eviden.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>, Zhao Liu <zhao1.liu@intel.com>

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[PULL 18/33] hw/cxl: Update CXL Fixed Memory Window ACPI description to include Back Invalidate support.

Posted by Michael S. Tsirkin 1 month, 2 weeks ago

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Defaults for these windows has always been to enable anything QEMU supports.
With the addition of back invalidate support it is necessary to specify that
host windows support this.

CXL emulation is currently only suitable for software stack verification.
The relaxation of the restrictions on this window to include BI have no
affect on the OS until BI capable devices are added and until now these
have not existed. As such no backwards compatibility impacts are expected
from this change.

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260204170936.43959-5-Jonathan.Cameron@huawei.com>
---
 hw/acpi/cxl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c
index 75edb2c0a6..f92f7fa3d5 100644
--- a/hw/acpi/cxl.c
+++ b/hw/acpi/cxl.c
@@ -172,7 +172,7 @@ static void cedt_build_cfmws(CXLFixedWindow *fw, Aml *cedt)
     build_append_int_noprefix(table_data, fw->enc_int_gran, 4);
 
     /* Window Restrictions */
-    build_append_int_noprefix(table_data, 0x0f, 2);
+    build_append_int_noprefix(table_data, 0x2f, 2);
 
     /* QTG ID */
     build_append_int_noprefix(table_data, 0, 2);
-- 
MST