From nobody Sun Nov 24 14:41:59 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 898B51D5CE7; Mon, 4 Nov 2024 22:29:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730759340; cv=none; b=to+lfK3uFaSsmq6mGExoSvE+w7mIEYbc7LNkypVYOO4ZF92+QKISYmf6UKSdzjcWBbyRnMANoJBj740pm8ppGHZX5xpDCtmfEeX7Rjdd9DOlRartNLrxnxRIzEFzAKkUYzliD4Er/HC1kCniTDPmCm+KB3FnldESNTal0iJ6HiI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730759340; c=relaxed/simple; bh=cvFPHv6BXaqs6ZQq9lz3LPO2fp5obcSoSN2yGWRjZrM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Qp24gCDk5uAxiLBbkjxUtIqID5d8Eyi2cXwF4U5Hc2jDcWsWiDL3H3rxFpbLFsBfkg6AqPkEtycijjQW+vlHY4Gu7oqtS75ZCAICrgdGwfOPCVcKG7Ri95afc1GJQQSzVK4MM7V2dG7pAQ9EmSw+DCLA7Cedlq0US+aykym/ahs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GJh1MlMu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GJh1MlMu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A126FC4CECE; Mon, 4 Nov 2024 22:28:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730759340; bh=cvFPHv6BXaqs6ZQq9lz3LPO2fp5obcSoSN2yGWRjZrM=; h=From:To:Cc:Subject:Date:From; b=GJh1MlMut0YOSsMYB1A3UZ6wwSP5BbjFxJPOdYCzHoDrSfeTaPLWCD00hyTGhaAfA 8RtziFLmWItlBCS5XiRbS45KGbUPO6DJhHrnxVVbpIAfXb3kNhK0Vg3vEEJG8H0V6S FwZnfqZPslEOMm3lvYYYkfMuZVdVWSep3xDj42XmKpUbx7TS/jGzMavkh/tC7dNtaI rd6zV1RyFDTd330UgHLzqr9VP2aaReGoFk1m3fDQmPEs3mBY1YjwdSAmlQ3Oz1yg8i lsHZifsNCy46cBeU6UwC7k90MqzQKjKZeupYhZJQpo+LanCo3XII5TgMIHW0qo+Tzp A/wlSbxMPgvjw== From: Mario Limonciello To: Borislav Petkov , "Rafael J . Wysocki" Cc: Thomas Gleixner , Ingo Molnar , Dave Hansen , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H . Peter Anvin" , Len Brown , Peter Zijlstra , Mario Limonciello , "Gautham R . Shenoy" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)), linux-acpi@vger.kernel.org (open list:ACPI), Ivan Shapovalov , Oleksandr Natalenko Subject: [PATCH v4] ACPI: processor: Move arch_init_invariance_cppc() call later Date: Mon, 4 Nov 2024 16:28:55 -0600 Message-ID: <20241104222855.3959267-1-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Mario Limonciello arch_init_invariance_cppc() is called at the end of acpi_cppc_processor_probe() in order to configure frequency invariance based upon the values from _CPC. This however doesn't work on AMD CPPC shared memory designs that have AMD preferred cores enabled because _CPC needs to be analyzed from all cores to judge if preferred cores are enabled. This issue manifests to users as a warning since commit 21fb59ab4b97 ("ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn"): ``` Could not retrieve highest performance (-19) ``` However the warning isn't the cause of this, it was actually commit 279f838a61f9 ("x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()") which exposed the issue. To fix this problem, change arch_init_invariance_cppc() into a new weak symbol that is called at the end of acpi_processor_driver_init(). Each architecture that supports it can declare the symbol to override the weak one. Fixes: 279f838a61f9 ("x86/amd: Detect preferred cores in amd_get_boost_rati= o_numerator()") Reported-by: Ivan Shapovalov Closes: https://bugzilla.kernel.org/show_bug.cgi?id=3D219431 Tested-by: Oleksandr Natalenko Signed-off-by: Mario Limonciello --- v4: * Drop macros and only use symbols v3: * Weak symbol instead of macro to help riscv build failure * Update commit message * Add comment --- arch/arm64/include/asm/topology.h | 4 ---- arch/x86/include/asm/topology.h | 5 ----- arch/x86/kernel/acpi/cppc.c | 7 ++++++- drivers/acpi/cppc_acpi.c | 6 ------ drivers/acpi/processor_driver.c | 9 +++++++++ drivers/base/arch_topology.c | 6 +++++- include/acpi/processor.h | 2 ++ include/linux/arch_topology.h | 4 ---- 8 files changed, 22 insertions(+), 21 deletions(-) diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/top= ology.h index 5fc3af9f8f29b..341174bf91063 100644 --- a/arch/arm64/include/asm/topology.h +++ b/arch/arm64/include/asm/topology.h @@ -26,10 +26,6 @@ void update_freq_counters_refs(void); #define arch_scale_freq_invariant topology_scale_freq_invariant #define arch_scale_freq_ref topology_get_freq_ref =20 -#ifdef CONFIG_ACPI_CPPC_LIB -#define arch_init_invariance_cppc topology_init_cpu_capacity_cppc -#endif - /* Replace task scheduler's default cpu-invariant accounting */ #define arch_scale_cpu_capacity topology_get_cpu_scale =20 diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topolog= y.h index aef70336d6247..92f3664dd933b 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -305,9 +305,4 @@ static inline void freq_invariance_set_perf_ratio(u64 r= atio, bool turbo_disabled extern void arch_scale_freq_tick(void); #define arch_scale_freq_tick arch_scale_freq_tick =20 -#ifdef CONFIG_ACPI_CPPC_LIB -void init_freq_invariance_cppc(void); -#define arch_init_invariance_cppc init_freq_invariance_cppc -#endif - #endif /* _ASM_X86_TOPOLOGY_H */ diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index 956984054bf30..aab9d0570841a 100644 --- a/arch/x86/kernel/acpi/cppc.c +++ b/arch/x86/kernel/acpi/cppc.c @@ -110,7 +110,7 @@ static void amd_set_max_freq_ratio(void) =20 static DEFINE_MUTEX(freq_invariance_lock); =20 -void init_freq_invariance_cppc(void) +static inline void init_freq_invariance_cppc(void) { static bool init_done; =20 @@ -127,6 +127,11 @@ void init_freq_invariance_cppc(void) mutex_unlock(&freq_invariance_lock); } =20 +void acpi_processor_init_invariance_cppc(void) +{ + init_freq_invariance_cppc(); +} + /* * Get the highest performance register value. * @cpu: CPU from which to get highest performance. diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 1a40f0514eaa3..5c0cc7aae8726 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -671,10 +671,6 @@ static int pcc_data_alloc(int pcc_ss_id) * ) */ =20 -#ifndef arch_init_invariance_cppc -static inline void arch_init_invariance_cppc(void) { } -#endif - /** * acpi_cppc_processor_probe - Search for per CPU _CPC objects. * @pr: Ptr to acpi_processor containing this CPU's logical ID. @@ -905,8 +901,6 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) goto out_free; } =20 - arch_init_invariance_cppc(); - kfree(output.pointer); return 0; =20 diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_drive= r.c index cb52dd000b958..3b281bc1e73c3 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -237,6 +237,9 @@ static struct notifier_block acpi_processor_notifier_bl= ock =3D { .notifier_call =3D acpi_processor_notifier, }; =20 +void __weak acpi_processor_init_invariance_cppc(void) +{ } + /* * We keep the driver loaded even when ACPI is not running. * This is needed for the powernow-k8 driver, that works even without @@ -270,6 +273,12 @@ static int __init acpi_processor_driver_init(void) NULL, acpi_soft_cpu_dead); =20 acpi_processor_throttling_init(); + + /* + * Frequency invariance calculations on AMD platforms can't be run until + * after acpi_cppc_processor_probe() has been called for all online CPUs + */ + acpi_processor_init_invariance_cppc(); return 0; err: driver_unregister(&acpi_processor_driver); diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 75fcb75d55155..3ebe77566788b 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -366,7 +366,7 @@ void __weak freq_inv_set_max_ratio(int cpu, u64 max_rat= e) #ifdef CONFIG_ACPI_CPPC_LIB #include =20 -void topology_init_cpu_capacity_cppc(void) +static inline void topology_init_cpu_capacity_cppc(void) { u64 capacity, capacity_scale =3D 0; struct cppc_perf_caps perf_caps; @@ -417,6 +417,10 @@ void topology_init_cpu_capacity_cppc(void) exit: free_raw_capacity(); } +void acpi_processor_init_invariance_cppc(void) +{ + topology_init_cpu_capacity_cppc(); +} #endif =20 #ifdef CONFIG_CPU_FREQ diff --git a/include/acpi/processor.h b/include/acpi/processor.h index e6f6074eadbf3..a17e97e634a68 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -465,4 +465,6 @@ extern int acpi_processor_ffh_lpi_probe(unsigned int cp= u); extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); #endif =20 +void acpi_processor_init_invariance_cppc(void); + #endif diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h index b721f360d7592..4a952c4885edc 100644 --- a/include/linux/arch_topology.h +++ b/include/linux/arch_topology.h @@ -11,10 +11,6 @@ void topology_normalize_cpu_scale(void); int topology_update_cpu_topology(void); =20 -#ifdef CONFIG_ACPI_CPPC_LIB -void topology_init_cpu_capacity_cppc(void); -#endif - struct device_node; bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu); =20 base-commit: 6db936d4ac0fe281af48b4d1ebf69b1523bbac31 --=20 2.43.0