From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 0E3A63E5EF9 for ; Thu, 19 Mar 2026 15:46:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773935181; cv=none; b=GLKiGlKSh9WN5RF+R/Lf9LhBfoNXUZNz+4nIz2R/PpgaksWN9rwihXxmWUEXXnsfOuFT5r6cTADhwh9eySdAF9jX4WkOjk9Y9n6HjhSQ3cfi03MiLVNBZWPUKgoJkcawsfT2yoA19H/LWyIT7iuukdzpgATjkyklLYYr8onbCe8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773935181; c=relaxed/simple; bh=Vf1R+yppKEzBQbnfv9nkce2qdQA1SU29FndglGF4ckQ=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=CctkgHab2RqRFfdQ4TDj2fPxU2MJw3d2HHtMEiA5i3/WS+KCWDRjcg9mzqqoAQOXS8j+/w737BfhEk7qp/sSQGzJvAfBgGISrISUXcKnQSfTiUAbnAmkwpDMHqJlgYlBl2r1k7vSV8IhCOtFZ7YdXYktGJHUPaY661Ns3ztqHUU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=Yld7gZy2; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=hmZB4iML; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="Yld7gZy2"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="hmZB4iML" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 62JF3Kjm2544624 for ; Thu, 19 Mar 2026 15:46:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=DvNqP241qE8dFBqHq5L6qVz4 ghSD7knOgVJYfSQ1B58=; b=Yld7gZy2Vwg7aTwn9M0NrrFrVWWy2GG/gLK7dKB6 3Xxqr/TDd+CZGMnsnJPz/K3Qa/xinQn4bBim6e/SIY2lxHC59LsOg3Ir/Bzop+FN nXALqgBdEtgGwTx4hrDwAIgi3E++GbgchA/Tb9JqtNNJE0lGCxQFp70ZN7dnnhpb gA2H4CjR3pEBLlK1y3IKFMLVtPdf3IqARQSJUG53twBLZifGbwlK4ijMhGb9hsol oPtOLe3EiflHII4K6ErRMacybeKHiy5UDD1BRgXKQBSo5+2t7g6sdf7GTIUnXg7/ 1fuSHqndq50QugXJHsDKcZ6CqP2RsEPQJBrTEF2i7yH6vg== Received: from mail-vs1-f70.google.com (mail-vs1-f70.google.com [209.85.217.70]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d0957t4w9-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 19 Mar 2026 15:46:18 +0000 (GMT) Received: by mail-vs1-f70.google.com with SMTP id ada2fe7eead31-5ff9edc2158so1516086137.3 for ; Thu, 19 Mar 2026 08:46:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1773935177; x=1774539977; darn=vger.kernel.org; h=mime-version:message-id:date:user-agent:references:in-reply-to :subject:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=DvNqP241qE8dFBqHq5L6qVz4ghSD7knOgVJYfSQ1B58=; b=hmZB4iMLgb1rCmaGPrYpXX3ziT+z664Nsg/VTPmt9oKrDjAD7BP0UuqU5KA3iUK/hz fPo5LeNwCASfr4n9/dvOLfISt5Xo0g+XpCjVr8Dd2HtfBmBkaYL+W4Axpf6f/SZ6cD+q pnwETaWQciLPYMyAUSF8EeroDHGDB762r+WIvEuKDEo2faUXvYx9kLxG68vre1Wcbxih hW5fKg9Gw0vONL8WCNrVhtONZR6HikszTCwyx+5YWK1tLisF6HueEu6ms2UXowVlJHJh urwHcdf5qjXU6n/az0vSG69EhoPMojSHPPpRyuCULJltu53eKghK3Iz5cssST9F6m9of KaUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773935177; x=1774539977; h=mime-version:message-id:date:user-agent:references:in-reply-to :subject:cc:to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=DvNqP241qE8dFBqHq5L6qVz4ghSD7knOgVJYfSQ1B58=; b=cqGuEt4crcwTn9ABI5xKT+NoiIwFo2Kf9ip3kNVMa6F4nFR0kfrkYkwDHCE8v08HhL pv70gy0dvRu+w+kWFCld0fmUHzH3kmVbfZxOYi+gokCoxMsEGysW1zavUi8QTthliuUF qn7Ef/4hS9vC045V8FlCP75HQQj49Y4b2Y2N0X/MkO84awiFnrCxB/8ehr6F/ZXTrk3l GobUEVvAe8H988M905KUwkF4ijTq1rP+8PCI7zEfzfTIEhP9GTUWVIO28lu8Kb/Ilx8e SKqtlTKZja4DOLdM5IqbnjVkk50XdjyOtIZXQ05K+jb0tYTAll4iqhS3PbcoZpgRG7ve b1ZQ== X-Forwarded-Encrypted: i=1; AJvYcCVTei0OBAlVlQeU6D04V9eZ9LTOmidvpMckT5hE+VBI2qohtCX63bP0oefw8T17IFRfkX7/xOk=@vger.kernel.org X-Gm-Message-State: AOJu0YxNS/QMaUVJ5c1P1GwyWmTE7fkmaRrkM/p/hR10wkh7i9oc85Uz BKNNrCXMuGq6Oes5wny3KboBSXZ7qzzJwgD1Gbatwf7djTNcoBx9xV+cRJMNaE7Vl1ERoN2DJ3h ah+OZVnWuN0T+gLhdfgDm8oGdM+lg5/9Xs6AvLtVreiVT1TzIypOwC2FSH/M= X-Gm-Gg: ATEYQzwiDkpUE6MIXpl/6deWzqkBe6tM2Q6y2hZi2+GqzpNCYYCrQIiHAEIryBTDquR Vwd9VMZMAX+2At1SC4dHBXnBtCR7dcXXlWNnCz8CxuBr5/pNxgCJ32Kwr0gYU7Us2IGBtjL0erm EHbuexph0Xv1D/PMDm8OaKD7dNEvFxkQq80X/WXa4jU7Ko4/FfxPO2qViikJBkNkRTlBnyE0YJ9 5z2YuxtGZx0KWUm1sf1QxJR7KPT5uqWhzEfl2RLy1vLKpLqpNRGT1MC/EM1YngRlWovgPA6Pnex nEGnGlSH/w1AtHk0dh7iEVj3mC+nZfPQQUzuda28AtJcBd1IwQ291A0lTXqpBBBhvKDOnAQMQxG wZZZJFhWmU5lAOtvuD4BMLGsufx6y/uPmlaWlEw== X-Received: by 2002:a05:6102:d89:b0:5ff:9d74:967b with SMTP id ada2fe7eead31-6027d330b13mr3043051137.20.1773935177030; Thu, 19 Mar 2026 08:46:17 -0700 (PDT) X-Received: by 2002:a05:6102:d89:b0:5ff:9d74:967b with SMTP id ada2fe7eead31-6027d330b13mr3042963137.20.1773935176396; Thu, 19 Mar 2026 08:46:16 -0700 (PDT) Received: from localhost ([2a01:4b00:b703:c200:1ac0:4dff:fe39:5426]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-486f8c40ccbsm129162465e9.9.2026.03.19.08.46.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Mar 2026 08:46:15 -0700 (PDT) From: Punit Agrawal To: Chengwen Feng Cc: Bjorn Helgaas , Catalin Marinas , Will Deacon , "Rafael J . Wysocki" , Jonathan Corbet , Shuah Khan , Huacai Chen , WANG Xuerui , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , , "H . Peter Anvin" , Juergen Gross , Boris Ostrovsky , Len Brown , Sunil V L , Mark Rutland , Jonathan Cameron , Kees Cook , Yanteng Si , Sean Christopherson , Kai Huang , Tom Lendacky , Thomas Huth , Thorsten Blum , Kevin Loughlin , Zheyun Shen , Peter Zijlstra , Pawan Gupta , Xin Li , "Ahmed S . Darwish" , Sohil Mehta , Ilkka Koskinen , Robin Murphy , James Clark , Besar Wicaksono , Ma Ke , Wei Huang , Andy Gospodarek , Somnath Kotur , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v9 1/7] arm64/acpi: Add acpi_get_cpu_uid() and switch arm_cspmu to use it In-Reply-To: <20260319065735.45954-2-fengchengwen@huawei.com> (Chengwen Feng's message of "Thu, 19 Mar 2026 14:57:29 +0800") References: <20260319065735.45954-1-fengchengwen@huawei.com> <20260319065735.45954-2-fengchengwen@huawei.com> User-Agent: Gnus/5.13 (Gnus v5.13) Date: Thu, 19 Mar 2026 15:46:14 +0000 Message-ID: <87341vq0u1.fsf@stealth> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-ORIG-GUID: uYsTjC9nEbDjDEHWsI1t9doxCL83-ko7 X-Proofpoint-GUID: uYsTjC9nEbDjDEHWsI1t9doxCL83-ko7 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzE5MDEyNCBTYWx0ZWRfX/1TARZagTWWP wk+diSg8rxLNB4JUDK2pkTgYnBRRw4ciyHiwMNtU70cENURqz5ZWkAQx+1/tPXm5yeeJyWgGg6X MM+oqqXR8oC5nUBXJq0SWhhO8hb7BdzvhZrwpYSJv7/+VzjkrzAhFiVgpesyd7Uw7e+aDVw5y7f XngeFfF4+SKkd+3tTE8NDkMZUpRoyp6+E0yJvjRqRw4IZzlQSxbj63IgIZB9Isfo8BTLGgidbS9 DD7LIoXp1FVlUlL4TaI/UGdxUmcHReelwR6kv43KWjK/TnB5pEmP/CAwTnajsc9ZTERu95OTubs M454Z6+n2iuU0fTxwU0j4gFZF7gBILxWGPTRBUoIGwzFpJLt65kqDL21mXSCPeC8CS+PYyNTWr1 hEsbSaMdAb8wQA8JqldUh0rjQP4rEokwaGHgEGj+o8n/6SSxJ5vXgWxky8Hv/p5eDuHiDmY1NdY vTyY8DX1f1uyt3fixtw== X-Authority-Analysis: v=2.4 cv=RZedyltv c=1 sm=1 tr=0 ts=69bc1a4a cx=c_pps a=N1BjEkVkxJi3uNfLdpvX3g==:117 a=xqWC_Br6kY4A:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=i0EeH86SAAAA:8 a=VwQbUJbxAAAA:8 a=Gl9ZV0r3yxOOH3mhj0oA:9 a=crWF4MFLhNY0qMRaF8an:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-19_02,2026-03-19_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 impostorscore=0 suspectscore=0 adultscore=0 spamscore=0 malwarescore=0 clxscore=1011 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603190124 Chengwen Feng writes: > Add arch-specific acpi_get_cpu_uid() for arm64, and update dependent > code: > - Declare acpi_get_cpu_uid() in arch/arm64/include/asm/acpi.h > - Implement acpi_get_cpu_uid() with input parameter validation > - Replace get_acpi_id_for_cpu() with acpi_get_cpu_uid() in > drivers/perf/arm_cspmu/arm_cspmu.c > - Reimplement get_cpu_for_acpi_id() based on acpi_get_cpu_uid() (to > align with new interface) and move its implementation next to > acpi_get_cpu_uid() There is no benefit in describing the code changes like this in the commit log. It makes it hard to follow the intent of the patch. > This is the first step towards unifying ACPI CPU UID retrieval interface > across architectures, while adding input validation for robustness. I would simplify the commit log to something along the lines of - As a step towards unifying the interface for retrieving ACPI CPU uid across architectures, introduce a new function acpi_get_cpu_uid(). While at it, also add input validation to make the code more robust. Just my 2c. The code changes looks fine. > Cc: stable@vger.kernel.org > Signed-off-by: Chengwen Feng > Reviewed-by: Jonathan Cameron > --- > arch/arm64/include/asm/acpi.h | 14 ++------------ > arch/arm64/kernel/acpi.c | 30 ++++++++++++++++++++++++++++++ > drivers/perf/arm_cspmu/arm_cspmu.c | 6 ++++-- > 3 files changed, 36 insertions(+), 14 deletions(-) > > diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h > index c07a58b96329..2219a3301e72 100644 > --- a/arch/arm64/include/asm/acpi.h > +++ b/arch/arm64/include/asm/acpi.h > @@ -118,18 +118,8 @@ static inline u32 get_acpi_id_for_cpu(unsigned int cpu) > { > return acpi_cpu_get_madt_gicc(cpu)->uid; > } > - > -static inline int get_cpu_for_acpi_id(u32 uid) > -{ > - int cpu; > - > - for (cpu = 0; cpu < nr_cpu_ids; cpu++) > - if (acpi_cpu_get_madt_gicc(cpu) && > - uid == get_acpi_id_for_cpu(cpu)) > - return cpu; > - > - return -EINVAL; > -} > +int acpi_get_cpu_uid(unsigned int cpu, u32 *uid); > +int get_cpu_for_acpi_id(u32 uid); > > static inline void arch_fix_phys_package_id(int num, u32 slot) { } > void __init acpi_init_cpus(void); > diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c > index af90128cfed5..24b9d934be54 100644 > --- a/arch/arm64/kernel/acpi.c > +++ b/arch/arm64/kernel/acpi.c > @@ -458,3 +458,33 @@ int acpi_unmap_cpu(int cpu) > } > EXPORT_SYMBOL(acpi_unmap_cpu); > #endif /* CONFIG_ACPI_HOTPLUG_CPU */ > + > +int acpi_get_cpu_uid(unsigned int cpu, u32 *uid) > +{ > + struct acpi_madt_generic_interrupt *gicc; > + > + if (cpu >= nr_cpu_ids) > + return -EINVAL; > + > + gicc = acpi_cpu_get_madt_gicc(cpu); > + if (!gicc) > + return -ENODEV; > + > + *uid = gicc->uid; > + return 0; > +} > +EXPORT_SYMBOL_GPL(acpi_get_cpu_uid); > + > +int get_cpu_for_acpi_id(u32 uid) > +{ > + u32 cpu_uid; > + int ret; > + > + for (int cpu = 0; cpu < nr_cpu_ids; cpu++) { > + ret = acpi_get_cpu_uid(cpu, &cpu_uid); > + if (ret == 0 && uid == cpu_uid) > + return cpu; > + } > + > + return -EINVAL; > +} > diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c > index 34430b68f602..ed72c3d1f796 100644 > --- a/drivers/perf/arm_cspmu/arm_cspmu.c > +++ b/drivers/perf/arm_cspmu/arm_cspmu.c > @@ -1107,15 +1107,17 @@ static int arm_cspmu_acpi_get_cpus(struct arm_cspmu *cspmu) > { > struct acpi_apmt_node *apmt_node; > int affinity_flag; > + u32 cpu_uid; > int cpu; > + int ret; > > apmt_node = arm_cspmu_apmt_node(cspmu->dev); > affinity_flag = apmt_node->flags & ACPI_APMT_FLAGS_AFFINITY; > > if (affinity_flag == ACPI_APMT_FLAGS_AFFINITY_PROC) { > for_each_possible_cpu(cpu) { > - if (apmt_node->proc_affinity == > - get_acpi_id_for_cpu(cpu)) { > + ret = acpi_get_cpu_uid(cpu, &cpu_uid); > + if (ret == 0 && apmt_node->proc_affinity == cpu_uid) { > cpumask_set_cpu(cpu, &cspmu->associated_cpus); > break; > } I think cspmu changes go via a separate pull request. You might have to split this change into a separate commit.