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| author | Yidi Lin <yidilin@chromium.org> | 2023-10-31 18:50:06 +0800 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2023-11-04 17:09:00 +0000 |
| commit | 85d7809e0ca80b94fd23a753e0894b8843d38367 (patch) | |
| tree | d3feaea2d547a513f8134e599145e36ce306f852 /payloads/libpayload/drivers/pci_ops.c | |
| parent | da1a0e891be5f6aed7af703b117a2fe60049f3bc (diff) | |
arch/arm64/arch_timer: Fix possible overflow in multiplication
The value from raw_read_cntfrq_el0() could be large enough to cause
overflow when multiplied by USECS_PER_SEC. To prevent this, both
USECS_PER_SEC and tfreq can be reduced by dividing them by their GCD.
BUG=b:307790895
TEST=emerge-geralt coreboot
TEST=boot to kernel and check the timestamps from `cbmem`
Change-Id: I366667de05392913150414f0fa9058725be71c52
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78800
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'payloads/libpayload/drivers/pci_ops.c')
0 files changed, 0 insertions, 0 deletions