| Message ID | 20240719122807.3853292-1-kane.chen@intel.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
| Series | [1/1] platform/x86/intel/pmc: Show live substate requirements | expand |
On Fri, 19 Jul 2024, Kane Chen wrote: > While debugging runtime s0ix, we do need to check which required IPs > are not power gated. This patch adds code to show live substate status > vs requirements in sys/kernel/debug/pmc_core/substate_requirements to > help runtime s0ix debug. > > Signed-off-by: Kane Chen <kane.chen@intel.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Hi, On 7/19/24 2:28 PM, Kane Chen wrote: > While debugging runtime s0ix, we do need to check which required IPs > are not power gated. This patch adds code to show live substate status > vs requirements in sys/kernel/debug/pmc_core/substate_requirements to > help runtime s0ix debug. > > Signed-off-by: Kane Chen <kane.chen@intel.com> Thank you for your patch, I've applied this patch to my review-hans branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans Note it will show up in my review-hans branch once I've pushed my local branch there, which might take a while. Once I've run some tests on this branch the patches there will be added to the platform-drivers-x86/for-next branch and eventually will be included in the pdx86 pull-request to Linus for the next merge-window. Regards, Hans > --- > drivers/platform/x86/intel/pmc/core.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c > index 2ad2f8753e5d4..b93ecc5169745 100644 > --- a/drivers/platform/x86/intel/pmc/core.c > +++ b/drivers/platform/x86/intel/pmc/core.c > @@ -791,13 +791,15 @@ static void pmc_core_substate_req_header_show(struct seq_file *s, int pmc_index) > pmc_for_each_mode(i, mode, pmcdev) > seq_printf(s, " %9s |", pmc_lpm_modes[mode]); > > - seq_printf(s, " %9s |\n", "Status"); > + seq_printf(s, " %9s |", "Status"); > + seq_printf(s, " %11s |\n", "Live Status"); > } > > static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) > { > struct pmc_dev *pmcdev = s->private; > u32 sts_offset; > + u32 sts_offset_live; > u32 *lpm_req_regs; > int num_maps, mp, pmc_index; > > @@ -811,6 +813,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) > maps = pmc->map->lpm_sts; > num_maps = pmc->map->lpm_num_maps; > sts_offset = pmc->map->lpm_status_offset; > + sts_offset_live = pmc->map->lpm_live_status_offset; > lpm_req_regs = pmc->lpm_req_regs; > > /* > @@ -828,6 +831,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) > for (mp = 0; mp < num_maps; mp++) { > u32 req_mask = 0; > u32 lpm_status; > + u32 lpm_status_live; > const struct pmc_bit_map *map; > int mode, idx, i, len = 32; > > @@ -842,6 +846,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) > /* Get the last latched status for this map */ > lpm_status = pmc_core_reg_read(pmc, sts_offset + (mp * 4)); > > + /* Get the runtime status for this map */ > + lpm_status_live = pmc_core_reg_read(pmc, sts_offset_live + (mp * 4)); > + > /* Loop over elements in this map */ > map = maps[mp]; > for (i = 0; map[i].name && i < len; i++) { > @@ -868,6 +875,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) > /* In Status column, show the last captured state of this agent */ > seq_printf(s, " %9s |", lpm_status & bit_mask ? "Yes" : " "); > > + /* In Live status column, show the live state of this agent */ > + seq_printf(s, " %11s |", lpm_status_live & bit_mask ? "Yes" : " "); > + > seq_puts(s, "\n"); > } > }
diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index 2ad2f8753e5d4..b93ecc5169745 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -791,13 +791,15 @@ static void pmc_core_substate_req_header_show(struct seq_file *s, int pmc_index) pmc_for_each_mode(i, mode, pmcdev) seq_printf(s, " %9s |", pmc_lpm_modes[mode]); - seq_printf(s, " %9s |\n", "Status"); + seq_printf(s, " %9s |", "Status"); + seq_printf(s, " %11s |\n", "Live Status"); } static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; u32 sts_offset; + u32 sts_offset_live; u32 *lpm_req_regs; int num_maps, mp, pmc_index; @@ -811,6 +813,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) maps = pmc->map->lpm_sts; num_maps = pmc->map->lpm_num_maps; sts_offset = pmc->map->lpm_status_offset; + sts_offset_live = pmc->map->lpm_live_status_offset; lpm_req_regs = pmc->lpm_req_regs; /* @@ -828,6 +831,7 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) for (mp = 0; mp < num_maps; mp++) { u32 req_mask = 0; u32 lpm_status; + u32 lpm_status_live; const struct pmc_bit_map *map; int mode, idx, i, len = 32; @@ -842,6 +846,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) /* Get the last latched status for this map */ lpm_status = pmc_core_reg_read(pmc, sts_offset + (mp * 4)); + /* Get the runtime status for this map */ + lpm_status_live = pmc_core_reg_read(pmc, sts_offset_live + (mp * 4)); + /* Loop over elements in this map */ map = maps[mp]; for (i = 0; map[i].name && i < len; i++) { @@ -868,6 +875,9 @@ static int pmc_core_substate_req_regs_show(struct seq_file *s, void *unused) /* In Status column, show the last captured state of this agent */ seq_printf(s, " %9s |", lpm_status & bit_mask ? "Yes" : " "); + /* In Live status column, show the live state of this agent */ + seq_printf(s, " %11s |", lpm_status_live & bit_mask ? "Yes" : " "); + seq_puts(s, "\n"); } }
While debugging runtime s0ix, we do need to check which required IPs are not power gated. This patch adds code to show live substate status vs requirements in sys/kernel/debug/pmc_core/substate_requirements to help runtime s0ix debug. Signed-off-by: Kane Chen <kane.chen@intel.com> --- drivers/platform/x86/intel/pmc/core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)