hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT -------------------------------- So far, all HISI chipsets follow the definition of the DDI0598 version, the value field of MPAM Memory Bandwidth Usage Monitor Register indicates the memory bandwidth usage in bytes per second. Therefore, as an instantaneous value for memory bandwidth statistics, there is no possibility of causing the register to overflow. Fixes: 74c0a1abcc21 ("arm64/mpam: Add judgment to distinguish MSMON_MBWU_CAPTURE definition") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 566bd92dc010..4da9be7581ea 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -923,19 +923,9 @@ static u64 mpam_msmon_overflow_val(struct mpam_msc_ris *ris) return GENMASK_ULL(30, 0); } -static const struct midr_range mbwu_flowrate_list[] = { - MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), - MIDR_ALL_VERSIONS(MIDR_HISI_LINXICORE9100), - MIDR_ALL_VERSIONS(MIDR_HISI_HIP12), - { /* sentinel */ } -}; - bool resctrl_arch_would_mbm_overflow(void) { - if (is_midr_in_range_list(read_cpuid_id(), mbwu_flowrate_list)) - return false; - - return true; + return read_cpuid_implementor() == ARM_CPU_IMP_HISI ? false : true; } static void __ris_msmon_read(void *arg) -- 2.25.1