From: Shiyang Ruan via <qemu-devel@nongnu.org>
To: qemu-devel@nongnu.org, linux-cxl@vger.kernel.org
Cc: Jonathan.Cameron@huawei.com, dan.j.williams@intel.com,
dave@stgolabs.net, ira.weiny@intel.com,
alison.schofield@intel.com, stable@vger.kernel.org
Subject: [PATCH v3 1/2] cxl/core: correct length of DPA field masks
Date: Wed, 17 Apr 2024 15:50:52 +0800 [thread overview]
Message-ID: <20240417075053.3273543-2-ruansy.fnst@fujitsu.com> (raw)
In-Reply-To: <20240417075053.3273543-1-ruansy.fnst@fujitsu.com>
The length of Physical Address in General Media Event Record/DRAM Event
Record is 64-bit, so the field mask should be defined as such length.
Otherwise, this causes cxl_general_media and cxl_dram tracepoints to
mask off the upper-32-bits of DPA addresses. The cxl_poison event is
unaffected.
If userspace was doing its own DPA-to-HPA translation this could lead to
incorrect page retirement decisions, but there is no known consumer
(like rasdaemon) of this event today.
Fixes: d54a531a430b ("cxl/mem: Trace General Media Event Record")
Cc: <stable@vger.kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
drivers/cxl/core/trace.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index e5f13260fc52..cdfce932d5b1 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -253,7 +253,7 @@ TRACE_EVENT(cxl_generic_event,
* DRAM Event Record
* CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
*/
-#define CXL_DPA_FLAGS_MASK 0x3F
+#define CXL_DPA_FLAGS_MASK 0x3FULL
#define CXL_DPA_MASK (~CXL_DPA_FLAGS_MASK)
#define CXL_DPA_VOLATILE BIT(0)
--
2.34.1
next prev parent reply other threads:[~2024-04-17 7:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-17 7:50 [PATCH v3 0/2] cxl: add poison creation event handler Shiyang Ruan via
2024-04-17 7:50 ` Shiyang Ruan via [this message]
2024-04-23 17:35 ` [PATCH v3 1/2] cxl/core: correct length of DPA field masks Ira Weiny
2024-04-23 17:35 ` Dan Williams
2024-04-23 17:42 ` Alison Schofield
2024-04-23 21:04 ` Ira Weiny
2024-04-25 10:05 ` Shiyang Ruan via
2024-04-25 16:04 ` Ira Weiny
2024-04-30 21:00 ` Alison Schofield
2024-05-03 11:37 ` Shiyang Ruan via
2024-04-17 7:50 ` [PATCH v3 2/2] cxl/core: add poison creation event handler Shiyang Ruan via
2024-04-17 17:30 ` Dave Jiang
2024-04-18 9:01 ` Shiyang Ruan via
2024-04-21 12:14 ` kernel test robot
2024-04-23 17:57 ` Ira Weiny
2024-05-03 10:42 ` Shiyang Ruan via
2024-05-08 16:15 ` Jonathan Cameron via
2024-04-23 18:40 ` Dan Williams
2024-05-03 11:32 ` Shiyang Ruan via
2024-05-21 5:35 ` Shiyang Ruan via
2024-05-22 6:45 ` Dan Williams
2024-05-24 15:15 ` Shiyang Ruan via
2024-05-28 10:13 ` Shiyang Ruan via
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