Unverified Commit 4dea807f authored by Xi Pardee's avatar Xi Pardee Committed by Ilpo Järvinen
Browse files

platform/x86:intel/pmc: Add support to undo ltr_ignore 



Add ltr_restore support to undo the ltr_ignore action. It sets the
ltr_ignore bit of the corresponding IP to 0. Ltr_restore reuses some
functionality of pmc_core_ltr_ignore_write() so moved the common
functionality into a helper function.

Signed-off-by: default avatarXi Pardee <xi.pardee@linux.intel.com>
Link: https://lore.kernel.org/r/20240624203218.2428475-10-xi.pardee@linux.intel.com


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent 9e7f1e71

drivers/platform/x86/intel/pmc/core.c

+32 −6
Original line number Diff line number Diff line
@@ -507,12 +507,10 @@ int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value, int ignore) 
	return 0;

}



static ssize_t pmc_core_ltr_ignore_write(struct file *file,

static ssize_t pmc_core_ltr_write(struct pmc_dev *pmcdev,

				  const char __user *userbuf,

					 size_t count, loff_t *ppos)

				  size_t count, int ignore)

{

	struct seq_file *s = file->private_data;

	struct pmc_dev *pmcdev = s->private;

	u32 value;

	int err;
@@ -520,17 +518,43 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file, 
	if (err)

		return err;



	err = pmc_core_send_ltr_ignore(pmcdev, value, 1);

	err = pmc_core_send_ltr_ignore(pmcdev, value, ignore);



	return err ?: count;

}



static ssize_t pmc_core_ltr_ignore_write(struct file *file,

					 const char __user *userbuf,

					 size_t count, loff_t *ppos)

{

	struct seq_file *s = file->private_data;

	struct pmc_dev *pmcdev = s->private;



	return pmc_core_ltr_write(pmcdev, userbuf, count, 1);

}



static int pmc_core_ltr_ignore_show(struct seq_file *s, void *unused)

{

	return 0;

}

DEFINE_SHOW_STORE_ATTRIBUTE(pmc_core_ltr_ignore);



static ssize_t pmc_core_ltr_restore_write(struct file *file,

					  const char __user *userbuf,

					  size_t count, loff_t *ppos)

{

	struct seq_file *s = file->private_data;

	struct pmc_dev *pmcdev = s->private;



	return pmc_core_ltr_write(pmcdev, userbuf, count, 0);

}



static int pmc_core_ltr_restore_show(struct seq_file *s, void *unused)

{

	return 0;

}

DEFINE_SHOW_STORE_ATTRIBUTE(pmc_core_ltr_restore);



static void pmc_core_slps0_dbg_latch(struct pmc_dev *pmcdev, bool reset)

{

	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
@@ -1208,6 +1232,8 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev) 
	debugfs_create_file("ltr_ignore", 0644, dir, pmcdev,

			    &pmc_core_ltr_ignore_fops);



	debugfs_create_file("ltr_restore", 0200, dir, pmcdev, &pmc_core_ltr_restore_fops);



	debugfs_create_file("ltr_show", 0444, dir, pmcdev, &pmc_core_ltr_fops);



	if (primary_pmc->map->s0ix_blocker_maps)