* [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake
@ 2026-01-15 2:01 Daniel Tang
2026-01-15 20:16 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Daniel Tang @ 2026-01-15 2:01 UTC (permalink / raw)
To: linux-kernel, linux-pm
Cc: Zhang Rui, Rafael J. Wysocki, Sumeet Pawnikar,
Srinivas Pandruvada
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>
---
drivers/powercap/intel_rapl_msr.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c
index 9a7e150b3536..a2bc0a9c1e10 100644
--- a/drivers/powercap/intel_rapl_msr.c
+++ b/drivers/powercap/intel_rapl_msr.c
@@ -162,6 +162,7 @@ static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
/* List of verified CPUs. */
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_ALDERLAKE, NULL),
X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL),
--
2.51.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake
2026-01-15 2:01 [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake Daniel Tang
@ 2026-01-15 20:16 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2026-01-15 20:16 UTC (permalink / raw)
To: Daniel Tang
Cc: linux-kernel, linux-pm, Zhang Rui, Rafael J. Wysocki,
Sumeet Pawnikar, Srinivas Pandruvada
On Thu, Jan 15, 2026 at 3:01 AM Daniel Tang
<danielzgtg.opensource@gmail.com> wrote:
>
> 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>
> ---
> drivers/powercap/intel_rapl_msr.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c
> index 9a7e150b3536..a2bc0a9c1e10 100644
> --- a/drivers/powercap/intel_rapl_msr.c
> +++ b/drivers/powercap/intel_rapl_msr.c
> @@ -162,6 +162,7 @@ static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
>
> /* List of verified CPUs. */
> 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_ALDERLAKE, NULL),
> X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL),
> --
Applied 6.20 material, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-01-15 20:16 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-01-15 2:01 [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake Daniel Tang
2026-01-15 20:16 ` Rafael J. Wysocki
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox