From patchwork Fri Oct 13 09:42:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Gross X-Patchwork-Id: 13420594 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 51976CDB485 for ; Fri, 13 Oct 2023 09:42:52 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.616350.958282 (Exim 4.92) (envelope-from ) id 1qrEgj-0000dm-2W; Fri, 13 Oct 2023 09:42:33 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 616350.958282; Fri, 13 Oct 2023 09:42:33 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qrEgi-0000df-VP; Fri, 13 Oct 2023 09:42:32 +0000 Received: by outflank-mailman (input) for mailman id 616350; Fri, 13 Oct 2023 09:42:32 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qrEgi-0000dZ-49 for xen-devel@lists.xenproject.org; Fri, 13 Oct 2023 09:42:32 +0000 Received: from smtp-out1.suse.de (smtp-out1.suse.de [2001:67c:2178:6::1c]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id d34b637c-69ac-11ee-9b0e-b553b5be7939; Fri, 13 Oct 2023 11:42:29 +0200 (CEST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id CA3DE21891; Fri, 13 Oct 2023 09:42:28 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 608CD1358F; Fri, 13 Oct 2023 09:42:28 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 0HxbFgQRKWUKGwAAMHmgww (envelope-from ); Fri, 13 Oct 2023 09:42:28 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: d34b637c-69ac-11ee-9b0e-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1697190148; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=fTzJIQp6znmn5VajoA1i/XMC/nPFDMfKldCpx9C01pE=; b=VJS41FxSwILxki8I8pxogPRsB2sz2LZ0NbOVKjuwvHg2l6kOHJzVQBiTA0BeDnW8/Ycga1 tc1XJlQFikxGZCLTx71iwjWc6WzCbZm9fyqpYVTt+4TjeJpfqrDYj6jvTTNn62nxEPUFho eoHXkdW+SdbvFZ1pXVa/b8iNn0vTMvo= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: javi.merino@cloud.com, Juergen Gross , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Paul Durrant , Bertrand Marquis , Volodymyr Babchuk , Tamas K Lengyel , Lukasz Hawrylko , "Daniel P. Smith" , =?utf-8?q?Mateusz_M=C3=B3?= =?utf-8?q?wka?= Subject: [PATCH v2 00/13] xen/spinlock: make recursive spinlocks a dedicated type Date: Fri, 13 Oct 2023 11:42:11 +0200 Message-Id: <20231013094224.7060-1-jgross@suse.com> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [0.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; NEURAL_HAM_LONG(-3.00)[-1.000]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_TWELVE(0.00)[17]; MID_CONTAINS_FROM(1.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.00)[38.51%] Instead of being able to use normal spinlocks as recursive ones, too, make recursive spinlocks a special lock type. This will make the spinlock structure smaller in production builds and add type-safety. This allows to increase the maximum number of physical cpus from 8191 to 65535 without increasing the size of the lock structure in production builds (the size of recursive spinlocks in debug builds will grow to 12 bytes due to that change). Changes in V2: - addressed comments by Jan Beulich - lots of additional cleanups - reorganized complete series Juergen Gross (13): xen/spinlock: fix coding style issues xen/spinlock: reduce lock profile ifdefs xen/spinlock: make spinlock initializers more readable xen/spinlock: introduce new type for recursive spinlocks xen/spinlock: rename recursive lock functions xen/spinlock: add rspin_[un]lock_irq[save|restore]() xen/spinlock: make struct lock_profile rspinlock_t aware xen/spinlock: add explicit non-recursive locking functions xen/spinlock: add another function level xen/spinlock: add missing rspin_is_locked() and rspin_barrier() xen/spinlock: split recursive spinlocks from normal ones xen/spinlock: remove indirection through macros for spin_*() functions xen/spinlock: support higher number of cpus xen/arch/arm/domain.c | 4 +- xen/arch/arm/mm.c | 4 +- xen/arch/x86/domain.c | 20 +-- xen/arch/x86/include/asm/mm.h | 2 +- xen/arch/x86/mm.c | 12 +- xen/arch/x86/mm/mem_sharing.c | 16 +- xen/arch/x86/mm/mm-locks.h | 6 +- xen/arch/x86/mm/p2m-pod.c | 6 +- xen/arch/x86/mm/p2m.c | 4 +- xen/arch/x86/tboot.c | 4 +- xen/arch/x86/traps.c | 14 +- xen/common/domain.c | 6 +- xen/common/domctl.c | 4 +- xen/common/grant_table.c | 10 +- xen/common/ioreq.c | 54 +++---- xen/common/memory.c | 4 +- xen/common/numa.c | 4 +- xen/common/page_alloc.c | 30 ++-- xen/common/spinlock.c | 292 +++++++++++++++++++++++----------- xen/drivers/char/console.c | 48 ++---- xen/drivers/passthrough/pci.c | 8 +- xen/include/xen/console.h | 5 +- xen/include/xen/sched.h | 10 +- xen/include/xen/spinlock.h | 176 ++++++++++++-------- 24 files changed, 447 insertions(+), 296 deletions(-)