This is a note to let you know that I've just added the patch titled
drm/xe/guc: Copy GuC log prior to dumping
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-xe-guc-copy-guc-log-prior-to-dumping.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b3e9f5e7e67a2ebb1fe184e1dd9c6f38358ffc03
Author: John Harrison <John.C.Harrison@xxxxxxxxx>
Date: Wed Oct 2 17:46:05 2024 -0700
drm/xe/guc: Copy GuC log prior to dumping
[ Upstream commit a59a403419aa03d5e44c8cf014e415490395b17f ]
Add an extra stage to the GuC log print to copy the log buffer into
regular host memory first, rather than printing the live GPU buffer
object directly. Doing so helps prevent inconsistencies due to the log
being updated as it is being dumped. It also allows the use of the
ASCII85 helper function for printing the log in a more compact form
than a straight hex dump.
v2: Use %zx instead of %lx for size_t prints.
v3: Replace hexdump code with ascii85 call (review feedback from
Matthew B). Move chunking code into next patch as that reduces the
deltas of both.
v4: Add a prefix to the ASCII85 output to aid tool parsing.
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: Julia Filipchuk <julia.filipchuk@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241003004611.2323493-6-John.C.Harrison@xxxxxxxxx
Stable-dep-of: 5dce85fecb87 ("drm/xe: Move the coredump registration to the worker thread")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/xe/xe_guc_log.c b/drivers/gpu/drm/xe/xe_guc_log.c
index a37ee34194284..be47780ec2a7e 100644
--- a/drivers/gpu/drm/xe/xe_guc_log.c
+++ b/drivers/gpu/drm/xe/xe_guc_log.c
@@ -6,9 +6,12 @@
#include "xe_guc_log.h"
#include <drm/drm_managed.h>
+#include <linux/vmalloc.h>
#include "xe_bo.h"
+#include "xe_devcoredump.h"
#include "xe_gt.h"
+#include "xe_gt_printk.h"
#include "xe_map.h"
#include "xe_module.h"
@@ -49,32 +52,35 @@ static size_t guc_log_size(void)
CAPTURE_BUFFER_SIZE;
}
+/**
+ * xe_guc_log_print - dump a copy of the GuC log to some useful location
+ * @log: GuC log structure
+ * @p: the printer object to output to
+ */
void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p)
{
struct xe_device *xe = log_to_xe(log);
size_t size;
- int i, j;
+ void *copy;
- xe_assert(xe, log->bo);
+ if (!log->bo) {
+ drm_puts(p, "GuC log buffer not allocated");
+ return;
+ }
size = log->bo->size;
-#define DW_PER_READ 128
- xe_assert(xe, !(size % (DW_PER_READ * sizeof(u32))));
- for (i = 0; i < size / sizeof(u32); i += DW_PER_READ) {
- u32 read[DW_PER_READ];
-
- xe_map_memcpy_from(xe, read, &log->bo->vmap, i * sizeof(u32),
- DW_PER_READ * sizeof(u32));
-#define DW_PER_PRINT 4
- for (j = 0; j < DW_PER_READ / DW_PER_PRINT; ++j) {
- u32 *print = read + j * DW_PER_PRINT;
-
- drm_printf(p, "0x%08x 0x%08x 0x%08x 0x%08x\n",
- *(print + 0), *(print + 1),
- *(print + 2), *(print + 3));
- }
+ copy = vmalloc(size);
+ if (!copy) {
+ drm_printf(p, "Failed to allocate %zu", size);
+ return;
}
+
+ xe_map_memcpy_from(xe, copy, &log->bo->vmap, 0, size);
+
+ xe_print_blob_ascii85(p, "Log data", copy, 0, size);
+
+ vfree(copy);
}
int xe_guc_log_init(struct xe_guc_log *log)
