Re: [PATCH v5 4/5] arm_mpam: resctrl: Add resctrl_arch_cntr_read() & resctrl_arch_reset_cntr()
From: Gavin Shan <hidden>
Date: 2026-07-15 10:23:45
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On 7/8/26 2:24 AM, Ben Horgan wrote:
From: James Morse <james.morse@arm.com> When used in 'mbm_event' mode, ABMC emulation, resctrl uses arch hooks to read and reset the memory bandwidth utilization (MBWU) counters. Add these. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Ben Horgan <ben.horgan@arm.com> Tested-by: Shaopeng Tan <redacted> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Reviewed-by: Shaopeng Tan <redacted> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> --- Changes since rfc v1: Move __reset_mon() and reset_mon_cdp_safe() helpers here support mbwu in __read_mon() Mention mbm_event mode in commit message Changes since v3: USE_PREALLOCATED_IDX, separate h/w counters are needed for code and data when cdp_enabled is true --- drivers/resctrl/mpam_resctrl.c | 99 +++++++++++++++++++++++++++++----- 1 file changed, 86 insertions(+), 13 deletions(-)
Reviewed-by: Gavin Shan <redacted>