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powercap: intel_rapl: Add PL4 support for Ice Lake 

[ Upstream commit 54b3cd55a515c7c0fcfa0c1f0b10d62c11d64bcc ]

Microsoft Surface Pro 7 firmware throttles the processor upon
boot/resume. Userspace needs to be able to restore the correct value.

Link: https://github.com/linux-surface/linux-surface/issues/706
Signed-off-by: Daniel Tang <danielzgtg.opensource@gmail.com>
Link: https://patch.msgid.link/6088605.ChMirdbgyp@daniel-desktop3
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Tang 2026-01-14 21:01:52 -05:00 committed by Sasha Levin
parent 2a9bf565d6
commit 790a984e34
1 changed files with 1 additions and 0 deletions
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drivers/powercap/intel_rapl_msr.c
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@ -140,6 +140,7 @@ static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
/* List of verified CPUs. */ /* List of verified CPUs. */
static const struct x86_cpu_id pl4_support_ids[] = { static const struct x86_cpu_id pl4_support_ids[] = {
X86_MATCH_VFM(INTEL_ICELAKE_L, NULL),
X86_MATCH_VFM(INTEL_TIGERLAKE_L, NULL), X86_MATCH_VFM(INTEL_TIGERLAKE_L, NULL),
X86_MATCH_VFM(INTEL_ALDERLAKE, NULL), X86_MATCH_VFM(INTEL_ALDERLAKE, NULL),
X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL), X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL),