From patchwork Tue Feb 21 22:33:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Usama Arif X-Patchwork-Id: 13148471 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80619C678D5 for ; Tue, 21 Feb 2023 22:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230363AbjBUWgQ (ORCPT ); Tue, 21 Feb 2023 17:36:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230015AbjBUWgN (ORCPT ); Tue, 21 Feb 2023 17:36:13 -0500 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFF2931E11 for ; Tue, 21 Feb 2023 14:35:45 -0800 (PST) Received: by mail-wr1-x42a.google.com with SMTP id z8so5721159wrm.8 for ; Tue, 21 Feb 2023 14:35:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=0pnDOENvPZPPRofzLURGJ/LFWArubW2KTtPcq1+8yXM=; b=sDCk9nu65x1h7dJPs44M/BnuWEgFJzsXV00gTIoXx7meSbOXnQtDBY0wrsXO12wg3Y cKEZupe1ZGO3V9BslVKM+Bgl61OUvmQOHLf19eqV12aD+HW50hTUP1buTUteGozI/lMv ObxEO8WDKxjeH6ben9x+ZZ2QoarIIVaSJD4PnkVgCT5+gCjTsft0g5EcnTn6Kt8lIquW Ju24R6XkP2IH0KtBCHbjXRK+XOuMqjbilTM70qGcmZBTIZAwr58lvSTfcidsdtuLbbhb 2HnuiQT973jntI+w3S4LKLhaDzEkaKwyF13oWIhdswPveKnmryUrR08oGBzMayQCR8k8 pJXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=0pnDOENvPZPPRofzLURGJ/LFWArubW2KTtPcq1+8yXM=; b=BXN+0KkOcY+ztRz9V229znzijcbC3+l84CXFs4xpeZTqvBgJexOWpX6PGMFBpVbNFr u7Ps5LkS7KjGuL4jIc0UwiToM9rNFYN/rzJsvx37RYoRn+v+cXaUuS7FRGTYB2rw6M0K qk+wJSeGe03aXZxxYJqaa6Etta4jOAIbikOTAQRD0ET3se9FPrIEJrxJbdHWva5Zh1zV zAYwimi4qFQl58csaPfhi4z0Ff9to9/ygXab62thu78gnvOgOh1zq1y+Km2RVTwfE9Jo EjEDiMq//gCkik69pLPqLivogx5Ta1nI6+eDbksmMl5LlbPJiM3I4K1xtD0njT4dQXek tGrw== X-Gm-Message-State: AO0yUKWEsLE3DB4nOmkCdJxVMfANPgqS2o/z5NmNSCf5tmCtScaU9Jbp Bw1XP3o7QSiEVAWb4ByDuwdMdw== X-Google-Smtp-Source: AK7set/xZTn72idcDDur5F/34x/QPvwKOGdJkPJ3dk6hC4tPAqrZqqfwvrS9g6p5iadzj5+FfPNsRg== X-Received: by 2002:a5d:4f8b:0:b0:2c5:5881:be0f with SMTP id d11-20020a5d4f8b000000b002c55881be0fmr5751134wru.25.1677018944105; Tue, 21 Feb 2023 14:35:44 -0800 (PST) Received: from usaari01.cust.communityfibre.co.uk ([2a02:6b6a:b566:0:1a14:8be6:b3a9:a95e]) by smtp.gmail.com with ESMTPSA id u13-20020a5d434d000000b002c55ec7f661sm4501254wrr.5.2023.02.21.14.35.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Feb 2023 14:35:43 -0800 (PST) From: Usama Arif To: dwmw2@infradead.org, tglx@linutronix.de, kim.phillips@amd.com Cc: piotrgorski@cachyos.org, oleksandr@natalenko.name, arjan@linux.intel.com, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, x86@kernel.org, pbonzini@redhat.com, paulmck@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, rcu@vger.kernel.org, mimoja@mimoja.de, hewenliang4@huawei.com, thomas.lendacky@amd.com, seanjc@google.com, pmenzel@molgen.mpg.de, fam.zheng@bytedance.com, punit.agrawal@bytedance.com, simon.evans@bytedance.com, liangma@liangbit.com, Usama Arif Subject: [PATCH v10 0/8] Parallel CPU bringup for x86_64 Date: Tue, 21 Feb 2023 22:33:44 +0000 Message-Id: <20230221223352.2288528-1-usama.arif@bytedance.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This version fixes suspend/resume not working with parallel smpboot in v9 (reported by Oleksandr Natalenko) by saving smpboot_control properly in x86_acpi_suspend_lowlevel. The patches have also been rebased to v6.2 and retested and the improvement in boot time is the same as v9. Thanks, Usama Changes across versions: v2: Cut it back to just INIT/SIPI/SIPI in parallel for now, nothing more v3: Clean up x2apic patch, add MTRR optimisation, lock topology update in preparation for more parallelisation. v4: Fixes to the real mode parallelisation patch spotted by SeanC, to avoid scribbling on initial_gs in common_cpu_up(), and to allow all 24 bits of the physical X2APIC ID to be used. That patch still needs a Signed-off-by from its original author, who once claimed not to remember writing it at all. But now we've fixed it, hopefully he'll admit it now :) v5: rebase to v6.1 and remeasure performance, disable parallel bringup for AMD CPUs. v6: rebase to v6.2-rc6, disabled parallel boot on amd as a cpu bug and reused timer calibration for secondary CPUs. v7: [David Woodhouse] iterate over all possible CPUs to find any existing cluster mask in alloc_clustermask. (patch 1/9) Keep parallel AMD support enabled in AMD, using APIC ID in CPUID leaf 0x0B (for x2APIC mode) or CPUID leaf 0x01 where 8 bits are sufficient. Included sanity checks for APIC id from 0x0B. (patch 6/9) Removed patch for reusing timer calibration for secondary CPUs. commit message and code improvements. v8: Fix CPU0 hotplug by setting up the initial_gs, initial_stack and early_gdt_descr. Drop trampoline lock and bail if APIC ID not found in find_cpunr. Code comments improved and debug prints added. v9: Drop patch to avoid repeated saves of MTRR at boot time. rebased and retested at v6.2-rc8. added kernel doc for no_parallel_bringup and made do_parallel_bringup __ro_after_init. v10: Fixed suspend/resume not working with parallel smpboot. rebased and retested to 6.2. fixed checkpatch errors. David Woodhouse (8): x86/apic/x2apic: Allow CPU cluster_mask to be populated in parallel cpu/hotplug: Move idle_thread_get() to cpu/hotplug: Add dynamic parallel bringup states before CPUHP_BRINGUP_CPU x86/smpboot: Reference count on smpboot_setup_warm_reset_vector() x86/smpboot: Split up native_cpu_up into separate phases and document them x86/smpboot: Support parallel startup of secondary CPUs x86/smpboot: Send INIT/SIPI/SIPI to secondary CPUs in parallel x86/smpboot: Serialize topology updates for secondary bringup .../admin-guide/kernel-parameters.txt | 3 + arch/x86/include/asm/realmode.h | 3 + arch/x86/include/asm/smp.h | 14 +- arch/x86/include/asm/topology.h | 2 - arch/x86/kernel/acpi/sleep.c | 7 + arch/x86/kernel/apic/apic.c | 2 +- arch/x86/kernel/apic/x2apic_cluster.c | 126 ++++--- arch/x86/kernel/cpu/common.c | 6 +- arch/x86/kernel/head_64.S | 99 ++++- arch/x86/kernel/smpboot.c | 350 +++++++++++++----- arch/x86/realmode/init.c | 3 + arch/x86/realmode/rm/trampoline_64.S | 14 + arch/x86/xen/smp_pv.c | 4 +- include/linux/cpuhotplug.h | 2 + include/linux/smpboot.h | 7 + kernel/cpu.c | 31 +- kernel/smpboot.c | 2 +- kernel/smpboot.h | 2 - 18 files changed, 519 insertions(+), 158 deletions(-)