hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IC35SV --------------------------------------------------- To check whether hardware supports the CMAX feature or not, not only needs to check the CMAX_WD field of the MPAMF_CCAP_IDR register, but also needs to check the NO_CMAX field. Fixes: b1576ca4ed95 ("arm_mpam: Probe and reset the rest of the features") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 3 ++- drivers/platform/mpam/mpam_internal.h | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 6876aa5873e2..0bc8393541f1 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -577,7 +577,8 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris) u32 ccap_features = mpam_read_partsel_reg(msc, CCAP_IDR); props->cmax_wd = FIELD_GET(MPAMF_CCAP_IDR_CMAX_WD, ccap_features); - if (props->cmax_wd) + if (props->cmax_wd && + !FIELD_GET(MPAMF_CCAP_IDR_NO_CMAX, ccap_features)) mpam_set_feature(mpam_feat_ccap_part, props); } diff --git a/drivers/platform/mpam/mpam_internal.h b/drivers/platform/mpam/mpam_internal.h index a613e5a77a85..d8854cc6f78e 100644 --- a/drivers/platform/mpam/mpam_internal.h +++ b/drivers/platform/mpam/mpam_internal.h @@ -391,6 +391,9 @@ void mpam_resctrl_exit(void); /* MPAMF_CCAP_IDR - MPAM features cache capacity partitioning ID register */ #define MPAMF_CCAP_IDR_CMAX_WD GENMASK(5, 0) +#define MPAMF_CCAP_IDR_HAS_CMIN BIT(29) +#define MPAMF_CCAP_IDR_NO_CMAX BIT(30) +#define MPAMF_CCAP_IDR_HAS_CMAX_SOFTLIM BIT(31) /* MPAMF_MBW_IDR - MPAM features memory bandwidth partitioning ID register */ #define MPAMF_MBW_IDR_BWA_WD GENMASK(5, 0) -- 2.25.1