mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-02-23 20:01:47 -05:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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: Xi Pardee <xi.pardee@linux.intel.com>
Link: https://lore.kernel.org/r/20240624203218.2428475-10-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Xi Pardee
2024-06-24 13:32:18 -07:00
committed by Ilpo Järvinen
parent 9e7f1e7156
commit 4dea807fa7
1 changed files with 32 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/platform/x86/intel/pmc/core.c
View File

@@ -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,
const char __user *userbuf,
size_t count, loff_t *ppos)
static ssize_t pmc_core_ltr_write(struct pmc_dev *pmcdev,
const char __user *userbuf,
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)