linux-kernel - Re: [PATCH v5 2/2] ACPI / CPPC: Make cppc acpi driver aware of pcc subspace ids

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Date:   Thu, 26 Oct 2017 15:19:32 -0600
From:   "Prakash, Prashanth" <pprakash@...eaurora.org>
To:     George Cherian <george.cherian@...ium.com>, devel@...ica.org,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Cc:     lv.zheng@...el.com, robert.moore@...el.com,
        jassisinghbrar@...il.com, lenb@...nel.org, rjw@...ysocki.net
Subject: Re: [PATCH v5 2/2] ACPI / CPPC: Make cppc acpi driver aware of pcc
 subspace ids


On 10/11/2017 2:54 AM, George Cherian wrote:
> Based on ACPI 6.2 Section 8.4.7.1.9 If the PCC register space is used,
> all PCC registers, for all processors in the same performance
> domain (as defined by _PSD), must be defined to be in the same subspace.
> Based on Section 14.1 of ACPI specification, it is possible to have a
> maximum of 256 PCC subspace ids. Add support of multiple PCC subspace id
> instead of using a single global pcc_data structure.
>
> While at that fix the time_delta check in send_pcc_cmd() so that last_mpar_reset
> and mpar_count is initialized properly.
>
> Signed-off-by: George Cherian <george.cherian@...ium.com>
Reviewed-by: Prashanth Prakash <pprakash@...eaurora.org>

--
Thanks,
Prashanth