From: Dave Jiang <dave.jiang@intel.com>
Date: Mon, 4 Sep 2023 13:28:04 +0000 (+0100)
Subject: hw/pci-bridge/cxl_upstream: Fix bandwidth entry base unit for SSLBIS
X-Git-Tag: v8.2.0-rc0~113^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bc63c99ef8184aaf2f6ea488e5fc9cfa391b871e;p=thirdparty%2Fqemu.git

hw/pci-bridge/cxl_upstream: Fix bandwidth entry base unit for SSLBIS

According to ACPI spec 6.5 5.2.28.4 System Locality Latency and Bandwidth
Information Structure, if the "Entry Base Unit" is 1024 for BW and the
matrix entry has the value of 100, the BW is 100 GB/s. So the
entry_base_unit should be changed from 1000 to 1024 given the comment notes
it's 16GB/s for .latency_bandwidth.

Fixes: 882877fc359d ("hw/pci-bridge/cxl-upstream: Add a CDAT table access DOE")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---

diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c
index 9159f48a8cb..2b9cf0cc979 100644
--- a/hw/pci-bridge/cxl_upstream.c
+++ b/hw/pci-bridge/cxl_upstream.c
@@ -262,7 +262,7 @@ static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv)
                 .length = sslbis_size,
             },
             .data_type = HMATLB_DATA_TYPE_ACCESS_BANDWIDTH,
-            .entry_base_unit = 1000,
+            .entry_base_unit = 1024,
         },
     };