linux-kernel - [PATCH v1] cpufreq: intel_pstate: Add Diamond Rapids OOB mode support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20251022215425.3566218-1-sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Wed, 22 Oct 2025 14:54:25 -0700
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Len Brown <lenb@...nel.org>,
	Rafael J Wysocki <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>
Cc: linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] cpufreq: intel_pstate: Add Diamond Rapids OOB mode support

Prevent intel_pstate from loading when Out-of-Band (OOB) P-states mode
is enabled.

The OOB identification mechanism for Diamond Rapids servers is the same
as for prior generation CPUs such as Granite Rapids. Add the Diamond
Rapids CPU model to intel_pstate_cpu_oob_ids[] to ensure correct OOB
handling.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
---
 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 38897bb14a2c..dd1ebfc7de28 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2761,6 +2761,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
 	X86_MATCH(INTEL_ATOM_CRESTMONT,		core_funcs),
 	X86_MATCH(INTEL_ATOM_CRESTMONT_X,	core_funcs),
 	X86_MATCH(INTEL_ATOM_DARKMONT_X,	core_funcs),
+	X86_MATCH(INTEL_DIAMONDRAPIDS_X,	core_funcs),
 	{}
 };
 #endif
-- 
2.43.0