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Tue, 11 Aug 2020 19:43:24 +0000 Received: from sumitg-l4t.nvidia.com (Not Verified[10.24.37.103]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Tue, 11 Aug 2020 12:43:23 -0700 From: Sumit Gupta To: , , , , , , , , , Subject: [Patch] cpufreq: replace cpu_logical_map with read_cpuid_mpir Date: Wed, 12 Aug 2020 01:13:17 +0530 Message-ID: <1597174997-22505-1-git-send-email-sumitg@nvidia.com> X-Mailer: git-send-email 2.7.4 X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1597174999; bh=bRBbhMbs7h3ckPB8wW+c1VeSnD+Qsd3GDY3eazmuf7I=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: X-NVConfidentiality:MIME-Version:Content-Type; b=n3To+SbS9L60gDx7dJi8lFE0LLYkF5biIwcWZi/gBrfsQupp24FCSJrrpyCCZIypu uCxy/y5zqG9nYtpfeeAVETttRAmGC3k+PWS4G3IW6z6kmP54u53o5ag3YsIK8dEUGN 9EuYiZ9wHVH1sCzJAlhBYdPB5XBEhDCwOBumKYhqi/I2jKa+DIv4aJnT3TeTuZN4kL jcmhhJ8DbgeT4otQm0mFjAlFK04Xxe0/OuY3RY5C02VntwvssqPQ8tbZPPNvnms4BQ wVOOecuQkvleVlrvWlJ0joA3QkK/do4CUkJLBU2nVX0zgep+pGmgkdAX4X+CfLf5p6 aYiaJPYYmwLpA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200811_154337_710195_F14E6DFE X-CRM114-Status: GOOD ( 14.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sumitg@nvidia.com, bbasu@nvidia.com, wangkefeng.wang@huawei.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Commit eaecca9e7710 ("arm64: Fix __cpu_logical_map undefined issue") fixes the issue with building tegra194 cpufreq driver as module. But the fix might cause problem while supporting physical cpu hotplug[1]. This patch fixes the original problem by avoiding use of cpu_logical_map(). Instead calling read_cpuid_mpidr() to get MPIDR on target cpu. [1] https://lore.kernel.org/linux-arm-kernel/20200724131059.GB6521@bogus/ Reviewed-by: Sudeep Holla Signed-off-by: Sumit Gupta --- drivers/cpufreq/tegra194-cpufreq.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index bae527e..e1d931c 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -56,9 +56,11 @@ struct read_counters_work { static struct workqueue_struct *read_counters_wq; -static enum cluster get_cpu_cluster(u8 cpu) +static void get_cpu_cluster(void *cluster) { - return MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 1); + u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK; + + *((uint32_t *)cluster) = MPIDR_AFFINITY_LEVEL(mpidr, 1); } /* @@ -186,8 +188,10 @@ static unsigned int tegra194_get_speed(u32 cpu) static int tegra194_cpufreq_init(struct cpufreq_policy *policy) { struct tegra194_cpufreq_data *data = cpufreq_get_driver_data(); - int cl = get_cpu_cluster(policy->cpu); u32 cpu; + u32 cl; + + smp_call_function_single(policy->cpu, get_cpu_cluster, &cl, true); if (cl >= data->num_clusters) return -EINVAL; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel