From patchwork Thu May 4 19:02:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13231657 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 0D28CC77B7C for ; Thu, 4 May 2023 19:10:01 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.529949.825052 (Exim 4.92) (envelope-from ) id 1pueKo-0008MM-C9; Thu, 04 May 2023 19:09:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 529949.825052; Thu, 04 May 2023 19:09:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pueKo-0008MD-9H; Thu, 04 May 2023 19:09:46 +0000 Received: by outflank-mailman (input) for mailman id 529949; Thu, 04 May 2023 19:09:45 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pueE9-00042j-3B for xen-devel@lists.xenproject.org; Thu, 04 May 2023 19:02:53 +0000 Received: from galois.linutronix.de (galois.linutronix.de [2a0a:51c0:0:12e:550::1]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 453fc104-eaae-11ed-b226-6b7b168915f2; Thu, 04 May 2023 21:02:52 +0200 (CEST) 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: 453fc104-eaae-11ed-b226-6b7b168915f2 Message-ID: <20230504185938.126719312@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683226972; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=C2xEv0EYOzjjBDOf0WNXDnbg3SxiEflVftHaff1ezNc=; b=R7TFizeMBd1vCDVjEXU0BtfNbQoQd0Q7O5Cmi/GhoH+A7DPO/eDCQYvwL8d0EzW6TZevXV zTSW3dCyZNMiwvAMbTbcTVfTHbY6pLve5Gv/afd1jzhLujx3f5ZspMS2zkpgXg0oDc3s5d kXcBYyWoHlipJH2VBBXdFP8QtRznLbAKZV10Ph92/Hk65CJwnRS+0u5oUwspH7khzqSQ/u SpYu0bcq4JwwE/JeCF3NwhBMiC+1RMRMfogzt5BdrL549/PBdPFpI4eEajMl9aEC63+JVF 9zu2Vsz02+ZJpxAIfDIw2+6pnaLRSdZXjwd9Lq61E8b+1bqiBtxkam2eHoBKxg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683226972; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=C2xEv0EYOzjjBDOf0WNXDnbg3SxiEflVftHaff1ezNc=; b=L3yFFvyeaWcbSL4+w4FNUsUl3Xq9FYBhGlVedajTlxgN49PBR5/K5uqBP8Q/AEH8xz/YfX kk6rHy0rbLZe69Cw== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , Paul Menzel , "Guilherme G. Piccoli" , Piotr Gorski , Usama Arif , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan , "Michael Kelley (LINUX)" Subject: [patch V2 33/38] x86/topology: Store extended topology leaf information References: <20230504185733.126511787@linutronix.de> MIME-Version: 1.0 Date: Thu, 4 May 2023 21:02:51 +0200 (CEST) From: Thomas Gleixner Save the extended topology leaf number if it exists and is valid in preparation of parallel CPU bringup. Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/topology.h | 1 + arch/x86/kernel/cpu/topology.c | 3 +++ 2 files changed, 4 insertions(+) --- --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -121,6 +121,7 @@ extern unsigned int __max_die_per_packag #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) +extern unsigned int topology_extended_leaf; extern unsigned int __max_logical_packages; #define topology_max_packages() (__max_logical_packages) --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -29,6 +29,8 @@ unsigned int __max_die_per_package __rea EXPORT_SYMBOL(__max_die_per_package); #ifdef CONFIG_SMP +unsigned int topology_extended_leaf __read_mostly; + /* * Check if given CPUID extended topology "leaf" is implemented */ @@ -72,6 +74,7 @@ int detect_extended_topology_early(struc if (leaf < 0) return -1; + topology_extended_leaf = leaf; set_cpu_cap(c, X86_FEATURE_XTOPOLOGY); cpuid_count(leaf, SMT_LEVEL, &eax, &ebx, &ecx, &edx);