Public bug reported:
[Impact]
The pmc_core interface /sys/kernel/debug/pmc_core/package_cstate_show indicates
which PC state the system enterred. Currently, powertop can't show correct PC
state, it only shows PC1 ~ PC3, so we need this interface to check the states.
[Fix]
Backport pmc_core commits from upstream.
[Test]
Verified on IceLake machines, the interface works.
[Regression Potential]
Low, the pmc_core is not a new driver, the new commits help to expose the
values to sysfs interface.
** Affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Also affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-osp1 (Ubuntu)
Status: In Progress => Invalid
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1836012
Title:
backport pmc_core
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