CVE-2026-72007: pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

From: Greg Kroah-Hartman <[email protected]>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

Per errata[1]:
ERR050531: VPU_NOC power down handshake may hang during VC8000E/VPUMIX
power up/down cycling.
Description: VC8000E reset de-assertion edge and AXI clock may have a
timing issue.
Workaround: Set bit2 (vc8000e_clk_en) of BLK_CLK_EN_CSR to 0 to gate off
both AXI clock and VC8000E clock sent to VC8000E and AXI clock sent to
VPU_NOC m_v_2 interface during VC8000E power up(VC8000E reset is
de-asserted by HW)

Add a bool variable is_errata_err050531 in
'struct imx8m_blk_ctrl_domain_data' to represent whether the workaround
is needed. If is_errata_err050531 is true, first clear the clk before
powering up gpc, then enable the clk after powering up gpc.

[1] https://www.nxp.com/webapp/Download?colCode=IMX8MP_1P33A

The Linux kernel CVE team has assigned CVE-2026-72007 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.1 with commit a1a5f15f7f6cb5c291f072af843305638c935be6 and fixed in 6.6.145 with commit 87af3ebc112fb3f06753794390daf0f665f151b4
	Issue introduced in 6.1 with commit a1a5f15f7f6cb5c291f072af843305638c935be6 and fixed in 6.12.97 with commit c498928f85651b56a4041ea165a22037eae69580
	Issue introduced in 6.1 with commit a1a5f15f7f6cb5c291f072af843305638c935be6 and fixed in 6.18.40 with commit 4ff3960f3527189bc115a927ed3561c758f562f1
	Issue introduced in 6.1 with commit a1a5f15f7f6cb5c291f072af843305638c935be6 and fixed in 7.1.5 with commit 4907f4c2d98b97e640191af5bcf2814ee1034b76
	Issue introduced in 6.1 with commit a1a5f15f7f6cb5c291f072af843305638c935be6 and fixed in 7.2-rc4 with commit 25e252bcf1593b420b12a7231d9dd64b885a2ae2

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-72007
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/pmdomain/imx/imx8m-blk-ctrl.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/87af3ebc112fb3f06753794390daf0f665f151b4
	https://git.kernel.org/stable/c/c498928f85651b56a4041ea165a22037eae69580
	https://git.kernel.org/stable/c/4ff3960f3527189bc115a927ed3561c758f562f1
	https://git.kernel.org/stable/c/4907f4c2d98b97e640191af5bcf2814ee1034b76
	https://git.kernel.org/stable/c/25e252bcf1593b420b12a7231d9dd64b885a2ae2