[PATCH 2/4] hw/cxl: Use host-only coherency for default CFMW restrictions

[Davidlohr Bueso <dave@stgolabs.net>]

Change the default CXL Fixed Memory Window restrictions from 0x2f to
0xe, dropping Device Coherent and Back-Invalidate.

host-only coherent combined with Back-Invalidate is undefined behavior.
Device Coherent alongside host-only coherent is permitted by the spec
(multiple restriction bits may be set) but advertises conflicting
coherency modes; neither belongs in the host-only default.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
 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 f92f7fa3d558..5ce5e8e083ba 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, 0x2f, 2);
+    build_append_int_noprefix(table_data, 0xe, 2);
 
     /* QTG ID */
     build_append_int_noprefix(table_data, 0, 2);
-- 
2.39.5