linux-kernel - Re: [PATCH] cpufreq: intel_pstate: Add Tigerlake support in no-HWP mode

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>] [<thread-prev] [day] [month] [year] [list]

Date:   Sat, 10 Sep 2022 18:42:01 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Doug Smythies <dsmythies@...us.net>
Cc:     srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Len Brown <lenb@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "M. Cagri Ari" <cagriari@...me>
Subject: Re: [PATCH] cpufreq: intel_pstate: Add Tigerlake support in no-HWP mode

On Tue, Sep 6, 2022 at 10:29 PM Doug Smythies <dsmythies@...us.net> wrote:
>
> Users may disable HWP in firmware, in which case intel_pstate wouldn't load
> unless the CPU model is explicitly supported.
>
> Add TIGERLAKE to the list of CPUs that can register intel_pstate while not
> advertising the HWP capability. Without this change, an TIGERLAKE in no-HWP
> mode could only use the acpi_cpufreq frequency scaling driver.
>
> See also commits:
> d8de7a44e11f: cpufreq: intel_pstate: Add Skylake servers support
> fbdc21e9b038: cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode
> 706c5328851d: cpufreq: intel_pstate: Add Cometlake support in no-HWP mode
>
> Reported by: M. Cargi Ari <cagriari@...me>
> Signed-off-by: Doug Smythies <dsmythies@...us.net>
> ---
>  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 57cdb3679885..fc3ebeb0bbe5 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -2416,6 +2416,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
>         X86_MATCH(SKYLAKE_X,            core_funcs),
>         X86_MATCH(COMETLAKE,            core_funcs),
>         X86_MATCH(ICELAKE_X,            core_funcs),
> +       X86_MATCH(TIGERLAKE,            core_funcs),
>         {}
>  };
>  MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
> --

Applied as 6.1 material, thanks!