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Tue, 23 Apr 2024 17:35:19 +0000 Date: Tue, 23 Apr 2024 10:35:16 -0700 From: Ira Weiny To: Shiyang Ruan , , CC: , , , , , Subject: Re: [PATCH v3 1/2] cxl/core: correct length of DPA field masks Message-ID: <6627f1544e5ab_cd8e02944e@iweiny-mobl.notmuch> References: <20240417075053.3273543-1-ruansy.fnst@fujitsu.com> <20240417075053.3273543-2-ruansy.fnst@fujitsu.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20240417075053.3273543-2-ruansy.fnst@fujitsu.com> X-ClientProxiedBy: BYAPR07CA0025.namprd07.prod.outlook.com (2603:10b6:a02:bc::38) To SA1PR11MB6733.namprd11.prod.outlook.com (2603:10b6:806:25c::17) Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA1PR11MB6733:EE_|MN0PR11MB6184:EE_ X-MS-Office365-Filtering-Correlation-Id: 1174435b-e93b-4e2f-0c95-08dc63bbbe9e X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|376005|1800799015|366007; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?HKCb6XR8QkJDUpCWl2Ul61nfLGyjqG3RVYzz1DnHlkHD8tR0zZZJN8sFvW1I?= =?us-ascii?Q?y2+tAgmTNCMeKyFGZTEfkp6DlRxkaxejTyYJHOXcZU8NKOOPDfE2ZLDosK/B?= =?us-ascii?Q?hf81VbGVOHW31Qjjq4evtOWEBJGovn8DJNEnzGkK6XhUE0I2FcR9/EgEcGR5?= =?us-ascii?Q?Mj/3O8BVJgvFIhw8kMu/VTC6VWtW6akP7+R5SDXJF/Yq1CHZDuHGS2aNNDSO?= =?us-ascii?Q?qJuovgXafAYWZSKwNa/eSt8OJxK8IGTY44jKqK6JDoSj4ELb6Jzmhj60M1jA?= =?us-ascii?Q?Me7S4HqI6w9OLQT9EFWt7mxw0/Ciwe8uvAQMl6x01C+86G+EqJvz6UVAvvw2?= =?us-ascii?Q?XlCgOoA4mt5yWAOGdO4Y9MEQwoWS6zHLeGFaFoIVJyJkpPvMJQDTU40qZXkN?= =?us-ascii?Q?fhVASvlmpW9ZNsFHSXqkS4LvYZokHoULunptRENf4TrAiMGsIAqFs2HjHTga?= =?us-ascii?Q?DEIAETUd369clNc3PX6aIrZv8dwa23K9r4z+92MEorph/QkCNn8+wl6kzRK5?= =?us-ascii?Q?x+p0STw5kixWnCSvg1Axzjs6XQMDZj0mTQgLSg8m3TGSz7fYZ68J/IkdfgDG?= =?us-ascii?Q?ify4l0rinnzlSCs8vcEDXS/+OHN5qrG+qawmpopWNQRwJV06g3ieusevwpEe?= =?us-ascii?Q?JscilhuXyDxe2lniNMFawaxjTQacL2sFVEbi+PrshXMhi158RINjxz7FpI9v?= =?us-ascii?Q?WUBgH4CnYpt4CikKBVs6F9qnzzLSIXNBo3Req2/9WT0U173ZYjJdt3BEPkCy?= =?us-ascii?Q?h4QMIOc2imw+TM4mDhCgLg5rOXCnOQ+GypigvEjBqHJtI2BzLlk94wilLmSW?= =?us-ascii?Q?77LthY2wmwRiyxfpNj51W+kaZ/SCqPsR/qOpdrpCX5F1sTUAmrBatWd4Vhru?= =?us-ascii?Q?n8x1GD7VtMF6IclDcyjc6qpsuph+7j0QxKh2Q/0PBUOszHieCKQql5BKejjo?= =?us-ascii?Q?1vdSu3dUV9qq3zmhprkQZlrLWzkxg7R46hKVyOXTIUkmhPZoEs/zN+twa/JU?= =?us-ascii?Q?gm/KcUgBuD7eyCpPege9PGnqDmmZTn+pGff3goi6ggMACLfOKAsnmL7bcsQ5?= =?us-ascii?Q?DPR28kHZfjuzYcjG6AzRdSEaayt3Xegbz0HavsLvFKJ97Af6w3y8UbN6/AJU?= =?us-ascii?Q?rF5Ucikbm5YBzdb/OrRngrRUaIi4yfIYuhlDi0b32FS9ZOrkBXxSzefjF/NA?= =?us-ascii?Q?BHiXas41Q+Pp3Mb0EV4ec7DHjFgfSko6yLK/OdrT11Y2A7V5WsayKSrjzzfR?= =?us-ascii?Q?uYldY4ovKVj0JZoHouOIw4UCCtB7GdFKr3d1gruUk5BpgHNuqsxoq9uheawl?= =?us-ascii?Q?W7EBKfvIbq9pGvmkMM8MGREHzcp8vVH3LdN95yABcooHCPT94p3preTqOtGv?= =?us-ascii?Q?joCDYkENcLMKQu3BwhBpjhLRalxhOpfc7gH/0F5QcjHs9q8out+BCr7T8lIB?= =?us-ascii?Q?r73F7AJotAUZZfbc5K711pRsdHJR5KO1dbpzECGI/iodbQ3yapKiGpeNGd5b?= =?us-ascii?Q?Nd+6+uTHGLiXUyKq0UpTYdLAjMSrzgeEadqfi+ilRg/Lzlder064QvmxHGX1?= =?us-ascii?Q?4CNaRq9qznWV9ZlSi5y4T55bXeD877So51J6B1a0?= X-MS-Exchange-CrossTenant-Network-Message-Id: 1174435b-e93b-4e2f-0c95-08dc63bbbe9e X-MS-Exchange-CrossTenant-AuthSource: SA1PR11MB6733.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Apr 2024 17:35:18.9538 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: wsn8oxD35ozFuQCv5ZYVTmUhY3kk+/qKAKg0SVgA4waVIoG2el/rr8CpyR0P6tWlsuLAAny0dgEuKhJkCfPH4w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR11MB6184 X-OriginatorOrg: intel.com Shiyang Ruan wrote: > 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: > Cc: Dan Williams > Cc: Davidlohr Bueso > Cc: Jonathan Cameron > Cc: Ira Weiny Apologies I thought I saw this go in before. But perhaps it was a different mask. Reviewed-by: Ira Weiny > Signed-off-by: Shiyang Ruan > --- > 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 >