iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cxl/memdev: Trace inject and clear poison as cxl_poison events

Browse Source 
The cxl_poison trace event allows users to view the history of poison
list reads. With the addition of inject and clear poison capabilities,
users will expect similar tracing.

Add trace types 'Inject' and 'Clear' to the cxl_poison trace_event and
trace successful operations only.

If the driver finds that the DPA being injected or cleared of poison
is mapped in a region, that region info is included in the cxl_poison
trace event. Region reconfigurations can make this extra info useless
if the debug operations are not carefully managed.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/e20eb7c3029137b480ece671998c183da0477e2e.1681874357.git.alison.schofield@intel.com
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Alison Schofield 2023-04-18 20:26:28 -07:00 committed by Dan Williams
parent 0a105ab28a
commit 98b6926562
3 changed files with 22 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/cxl/core/core.h
View File

@ -71,6 +71,8 @@ void cxl_mbox_init(void);
enum cxl_poison_trace_type {
CXL_POISON_TRACE_LIST,
CXL_POISON_TRACE_INJECT,
CXL_POISON_TRACE_CLEAR,
};
#endif /* __CXL_CORE_H__ */

15
drivers/cxl/core/memdev.c
View File

@ -6,6 +6,7 @@
#include <linux/idr.h>
#include <linux/pci.h>
#include <cxlmem.h>
#include "trace.h"
#include "core.h"
static DECLARE_RWSEM(cxl_memdev_rwsem);
@ -232,6 +233,7 @@ int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_mbox_inject_poison inject;
struct cxl_poison_record record;
struct cxl_mbox_cmd mbox_cmd;
struct cxl_region *cxlr;
int rc;
@ -262,6 +264,12 @@ int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa)
dev_warn_once(cxlds->dev,
"poison inject dpa:%#llx region: %s\n", dpa,
dev_name(&cxlr->dev));
record = (struct cxl_poison_record) {
.address = cpu_to_le64(dpa),
.length = cpu_to_le32(1),
};
trace_cxl_poison(cxlmd, cxlr, &record, 0, 0, CXL_POISON_TRACE_INJECT);
out:
up_read(&cxl_dpa_rwsem);
@ -273,6 +281,7 @@ int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_mbox_clear_poison clear;
struct cxl_poison_record record;
struct cxl_mbox_cmd mbox_cmd;
struct cxl_region *cxlr;
int rc;
@ -311,6 +320,12 @@ int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa)
if (cxlr)
dev_warn_once(cxlds->dev, "poison clear dpa:%#llx region: %s\n",
dpa, dev_name(&cxlr->dev));
record = (struct cxl_poison_record) {
.address = cpu_to_le64(dpa),
.length = cpu_to_le32(1),
};
trace_cxl_poison(cxlmd, cxlr, &record, 0, 0, CXL_POISON_TRACE_CLEAR);
out:
up_read(&cxl_dpa_rwsem);

8
drivers/cxl/core/trace.h
View File

@ -602,9 +602,11 @@ TRACE_EVENT(cxl_memory_module,
)
);
#define show_poison_trace_type(type) \
__print_symbolic(type, \
{ CXL_POISON_TRACE_LIST, "List" })
#define show_poison_trace_type(type) \
__print_symbolic(type, \
{ CXL_POISON_TRACE_LIST, "List" }, \
{ CXL_POISON_TRACE_INJECT, "Inject" }, \
{ CXL_POISON_TRACE_CLEAR, "Clear" })
#define __show_poison_source(source) \
__print_symbolic(source, \