hulk inclusion category: cleanup bugzilla: https://gitee.com/openeuler/kernel/issues/ID29QH -------------------------------- To facilitate scoping the problem and making diagnostics easier, MPAM provides print logs for register operations. Enable this feature with the following command: echo 'file mpam_devices.c +p' > /sys/kernel/debug/dynamic_debug/control echo 8 > /proc/sys/kernel/printk Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 556cdde88d13..eca84342a5fe 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -114,12 +114,16 @@ static void __mpam_write_reg(struct mpam_msc *msc, u16 reg, u32 val) lockdep_assert_held_once(&msc->part_sel_lock); \ ____ret = __mpam_read_reg(msc, MPAMF_##reg); \ \ + pr_debug("par r: msc %d reg 0x%x val 0x%x\n", \ + msc->id, MPAMF_##reg, ____ret); \ ____ret; \ }) #define mpam_write_partsel_reg(msc, reg, val) \ ({ \ lockdep_assert_held_once(&msc->part_sel_lock); \ + pr_debug("par w: msc %d reg 0x%x val 0x%lx\n", \ + msc->id, MPAMCFG_##reg, (unsigned long)val); \ __mpam_write_reg(msc, MPAMCFG_##reg, val); \ }) @@ -130,12 +134,16 @@ static void __mpam_write_reg(struct mpam_msc *msc, u16 reg, u32 val) lockdep_assert_held_once(&msc->mon_sel_lock); \ ____ret = __mpam_read_reg(msc, MSMON_##reg); \ \ + pr_debug("mon r: msc %d reg 0x%x val 0x%x\n", \ + msc->id, MSMON_##reg, ____ret); \ ____ret; \ }) #define mpam_write_monsel_reg(msc, reg, val) \ ({ \ lockdep_assert_held_once(&msc->mon_sel_lock); \ + pr_debug("mon w: msc %d reg 0x%x val 0x%lx\n", \ + msc->id, MSMON_##reg, (unsigned long)val); \ __mpam_write_reg(msc, MSMON_##reg, val); \ }) @@ -471,6 +479,9 @@ static int mpam_ris_get_affinity(struct mpam_msc *msc, cpumask_t *affinity, cpumask_and(affinity, affinity, &msc->accessibility); + pr_debug("comp_id %d msc->id %d affinity %*pb\n", + comp->comp_id, msc->id, cpumask_pr_args(affinity)); + return 0; } -- 2.25.1