Integrate 2 upstream fixes to correct the desired performance calculation in cppc_cpufreq driver.
Signed-off-by: Duc Dang dhdang@apm.com --- ...C-Avoid-overflow-when-calculating-desired.patch | 31 +++++++++++++++ ...req-CPPC-Correct-desired_perf-calculation.patch | 46 ++++++++++++++++++++++ SPECS/kernel-aarch64.spec | 13 +++++- 3 files changed, 89 insertions(+), 1 deletion(-) create mode 100644 SOURCES/1001-cpufreq-CPPC-Avoid-overflow-when-calculating-desired.patch create mode 100644 SOURCES/1002-cpufreq-CPPC-Correct-desired_perf-calculation.patch
diff --git a/SOURCES/1001-cpufreq-CPPC-Avoid-overflow-when-calculating-desired.patch b/SOURCES/1001-cpufreq-CPPC-Avoid-overflow-when-calculating-desired.patch new file mode 100644 index 0000000..486f175 --- /dev/null +++ b/SOURCES/1001-cpufreq-CPPC-Avoid-overflow-when-calculating-desired.patch @@ -0,0 +1,31 @@ +From 8b5a7d03a65c86a4473bd10b582fc9b6fe434c31 Mon Sep 17 00:00:00 2001 +From: Hoan Tran hotran@apm.com +Date: Wed, 14 Sep 2016 16:08:28 -0700 +Subject: [PATCH 1001/1018] cpufreq: CPPC: Avoid overflow when calculating + desired_perf + +This patch fixes overflow issue when calculating the desired_perf. + +Fixes: ad38677df44b (cpufreq: CPPC: Force reporting values in KHz to fix user space interface) +Signed-off-by: Hoan Tran hotran@apm.com +Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com +--- + drivers/cpufreq/cppc_cpufreq.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c +index 6fe8415..61d2ac6 100644 +--- a/drivers/cpufreq/cppc_cpufreq.c ++++ b/drivers/cpufreq/cppc_cpufreq.c +@@ -84,7 +84,7 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, + + cpu = all_cpu_data[policy->cpu]; + +- cpu->perf_ctrls.desired_perf = target_freq * policy->max / cppc_dmi_max_khz; ++ cpu->perf_ctrls.desired_perf = (u64)target_freq * policy->max / cppc_dmi_max_khz; + freqs.old = policy->cur; + freqs.new = target_freq; + +-- +1.8.3.1 + diff --git a/SOURCES/1002-cpufreq-CPPC-Correct-desired_perf-calculation.patch b/SOURCES/1002-cpufreq-CPPC-Correct-desired_perf-calculation.patch new file mode 100644 index 0000000..ec16cc1 --- /dev/null +++ b/SOURCES/1002-cpufreq-CPPC-Correct-desired_perf-calculation.patch @@ -0,0 +1,46 @@ +From 3ed005a638f6790c6c80fd8ea99b1b054a55a500 Mon Sep 17 00:00:00 2001 +From: Hoan Tran hotran@apm.com +Date: Thu, 13 Oct 2016 10:33:35 -0700 +Subject: [PATCH 1002/1018] cpufreq: CPPC: Correct desired_perf calculation + +The desired_perf is an abstract performance number. Its value should +be in the range of [lowest perf, highest perf] of CPPC. +The correct calculation is + desired_perf = freq * cppc_highest_perf / cppc_dmi_max_khz + +And cppc_cpufreq_set_target() returns if desired_perf is exactly +the same with the old perf. + +Signed-off-by: Hoan Tran hotran@apm.com +Reviewed-by: Prashanth Prakash pprakash@codeaurora.org +Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com +--- + drivers/cpufreq/cppc_cpufreq.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c +index 61d2ac6..c87f655 100644 +--- a/drivers/cpufreq/cppc_cpufreq.c ++++ b/drivers/cpufreq/cppc_cpufreq.c +@@ -80,11 +80,17 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, + { + struct cpudata *cpu; + struct cpufreq_freqs freqs; ++ u32 desired_perf; + int ret = 0; + + cpu = all_cpu_data[policy->cpu]; + +- cpu->perf_ctrls.desired_perf = (u64)target_freq * policy->max / cppc_dmi_max_khz; ++ desired_perf = (u64)target_freq * cpu->perf_caps.highest_perf / cppc_dmi_max_khz; ++ /* Return if it is exactly the same perf */ ++ if (desired_perf == cpu->perf_ctrls.desired_perf) ++ return ret; ++ ++ cpu->perf_ctrls.desired_perf = desired_perf; + freqs.old = policy->cur; + freqs.new = target_freq; + +-- +1.8.3.1 + diff --git a/SPECS/kernel-aarch64.spec b/SPECS/kernel-aarch64.spec index ffaafe7..2aff470 100644 --- a/SPECS/kernel-aarch64.spec +++ b/SPECS/kernel-aarch64.spec @@ -12,7 +12,7 @@ Summary: The Linux kernel
%define rpmversion 4.5.0 %define pkgrelease 15.el7 -%define centupdate 16.el7 +%define centupdate 17.el7
# allow pkg_release to have configurable %{?dist} tag %define specrelease %%SPECRELEASE%% @@ -324,6 +324,10 @@ Source58: config-generic Source59: config-debug Source60: config-centos-sig
+#APM Patches +Patch1001: 1001-cpufreq-CPPC-Avoid-overflow-when-calculating-desired.patch +Patch1002: 1002-cpufreq-CPPC-Correct-desired_perf-calculation.patch + # QDF2400 Patches Patch4000: 4000-arm64-Define-Qualcomm-Technologies-ARMv8-CPU.patch Patch4001: 4001-arm64-Workaround-Falkor-E1003.patch @@ -657,6 +661,10 @@ if [ ! -d .git ]; then git commit -a -q -m "baseline" fi
+# Aplly APM patches +git am %{PATCH1001} +git am %{PATCH1002} + # Apply QDF2400 patches git am %{PATCH4000} git am %{PATCH4001} @@ -1434,6 +1442,9 @@ fi %kernel_variant_files %{with_debug} kernel-debug debug
%changelog +* Thu Nov 10 2016 Duc Dang dhdang@apm.com [4.5.0-17.el7] +- Add cpufreq CPPC bug fixes + * Mon Nov 07 2016 Christopher Covington cov@codeaurora.org [4.5.0-16.el7] - Add git machinery (Jim Perrin)