coresight: catu: Fix number of pages while using 64k pages

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[ Upstream commit 0e14e062f5 ]

Trying to record a trace on kernel with 64k pages resulted in -ENOMEM.
This happens due to a bug in calculating the number of table pages, which
returns zero. Fix the issue by rounding up.

$ perf record --kcore -e cs_etm/@tmc_etr55,cycacc,branch_broadcast/k --per-thread taskset --cpu-list 1 dd if=/dev/zero of=/dev/null
failed to mmap with 12 (Cannot allocate memory)

Fixes: 8ed536b1e2 ("coresight: catu: Add support for scatter gather tables")
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250109215348.5483-1-ilkka@os.amperecomputing.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ilkka Koskinen 2025-01-09 21:53:48 +00:00 • committed by Greg Kroah-Hartman

parent 6f774f82a7

commit e90a5776e1

1 changed files with 1 additions and 1 deletions

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drivers/hwtracing/coresight/coresight-catu.c

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