From patchwork Sat Oct 12 10:44:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833610 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 0DAA2CF2564 for ; Sat, 12 Oct 2024 10:31:08 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZMY-0003md-IX; Sat, 12 Oct 2024 06:28:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMX-0003mA-MN; Sat, 12 Oct 2024 06:28:41 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMU-0007CT-SP; Sat, 12 Oct 2024 06:28:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728919; x=1760264919; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8R++r2MCbkNqCx8tzQ2ZcE1mFLxPLUpbawGSsNU0uhw=; b=DLlh+L7WgzOtHye7dlN4ESUrcxMhMXuYlSNk5y0Um3tdGKs9ygCFxUOo uEqhcwqsVFCRK+HN4TB3tP6KXdNZu9gj+iHv2/qAspjlzrbeo2Eg7Snli Y/sh2N7W6Te/XG/zImdGvxB47YgyVwfk8nktKjZoAXl00o9BJwoO9Jyls 8Vx3QcTiWpC9RflK4a3zppUmin8apu0t58tdU2PdYoKReSbd4jSAwsyt/ ZDzOKuKfJzsP58RLebLTswd9s76aKyKQLCXw9EN+LgVSFXnU04fx94plF at9sb31uyzpiL2fNSG/xWb/EaOp8tamkqmASho2wls8Sa+0KAaOjhmQaA g==; X-CSE-ConnectionGUID: 1zv+WxnITjGyLzRNYWoBzw== X-CSE-MsgGUID: PD3MOqIGRkivX766vPz2aA== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634864" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634864" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:28:37 -0700 X-CSE-ConnectionGUID: VNs4gEnNSpCM7a0e91J/UQ== X-CSE-MsgGUID: ve74OZ0URqmFhNssm49ejw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050819" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:28:31 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 1/7] hw/core: Make CPU topology enumeration arch-agnostic Date: Sat, 12 Oct 2024 18:44:23 +0800 Message-Id: <20241012104429.1048908-2-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Cache topology needs to be defined based on CPU topology levels. Thus, define CPU topology enumeration in qapi/machine.json to make it generic for all architectures. To match the general topology naming style, rename CPU_TOPO_LEVEL_* to CPU_TOPOLOGY_LEVEL_*, and rename SMT and package levels to thread and socket. Also, enumerate additional topology levels for non-i386 arches, and add a CPU_TOPOLOGY_LEVEL_DEFAULT to help future smp-cache object to work with compatibility requirement of arch-specific cache topology models. Signed-off-by: Zhao Liu Tested-by: Yongwei Ma --- Changes since Patch v2: * Updated version of new QAPI structures to v9.2. (Jonathan) Changes since Patch v1: * Dropped prefix of CpuTopologyLevel enumeration. (Markus) * Rename CPU_TOPO_LEVEL_* to CPU_TOPOLOGY_LEVEL_* to match the QAPI's generated code. (Markus) Changes since RFC v2: * Dropped cpu-topology.h and cpu-topology.c since QAPI has the helper (CpuTopologyLevel_str) to convert enum to string. (Markus) * Fixed text format in machine.json (CpuTopologyLevel naming, 2 spaces between sentences). (Markus) * Added a new level "default" to de-compatibilize some arch-specific topo settings. (Daniel) * Moved CpuTopologyLevel to qapi/machine-common.json, at where the cache enumeration and smp-cache object would be added. - If smp-cache object is defined in qapi/machine.json, storage-daemon will complain about the qmp cmds in qapi/machine.json during compiling. Changes since RFC v1: * Used QAPI to enumerate CPU topology levels. * Dropped string_to_cpu_topo() since QAPI will help to parse the topo levels. --- hw/i386/x86-common.c | 4 +- include/hw/i386/topology.h | 22 +----- qapi/machine-common.json | 46 +++++++++++- target/i386/cpu.c | 144 ++++++++++++++++++------------------- target/i386/cpu.h | 4 +- 5 files changed, 124 insertions(+), 96 deletions(-) diff --git a/hw/i386/x86-common.c b/hw/i386/x86-common.c index 992ea1f25e94..b21d2ab97349 100644 --- a/hw/i386/x86-common.c +++ b/hw/i386/x86-common.c @@ -273,12 +273,12 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev, if (ms->smp.modules > 1) { env->nr_modules = ms->smp.modules; - set_bit(CPU_TOPO_LEVEL_MODULE, env->avail_cpu_topo); + set_bit(CPU_TOPOLOGY_LEVEL_MODULE, env->avail_cpu_topo); } if (ms->smp.dies > 1) { env->nr_dies = ms->smp.dies; - set_bit(CPU_TOPO_LEVEL_DIE, env->avail_cpu_topo); + set_bit(CPU_TOPOLOGY_LEVEL_DIE, env->avail_cpu_topo); } /* diff --git a/include/hw/i386/topology.h b/include/hw/i386/topology.h index dff49fce1154..bf740383038b 100644 --- a/include/hw/i386/topology.h +++ b/include/hw/i386/topology.h @@ -39,7 +39,7 @@ * CPUID Fn8000_0008_ECX[ApicIdCoreIdSize[3:0]] is set to apicid_core_width(). */ - +#include "qapi/qapi-types-machine-common.h" #include "qemu/bitops.h" /* @@ -62,22 +62,6 @@ typedef struct X86CPUTopoInfo { unsigned threads_per_core; } X86CPUTopoInfo; -/* - * CPUTopoLevel is the general i386 topology hierarchical representation, - * ordered by increasing hierarchical relationship. - * Its enumeration value is not bound to the type value of Intel (CPUID[0x1F]) - * or AMD (CPUID[0x80000026]). - */ -enum CPUTopoLevel { - CPU_TOPO_LEVEL_INVALID, - CPU_TOPO_LEVEL_SMT, - CPU_TOPO_LEVEL_CORE, - CPU_TOPO_LEVEL_MODULE, - CPU_TOPO_LEVEL_DIE, - CPU_TOPO_LEVEL_PACKAGE, - CPU_TOPO_LEVEL_MAX, -}; - /* Return the bit width needed for 'count' IDs */ static unsigned apicid_bitwidth_for_count(unsigned count) { @@ -212,8 +196,8 @@ static inline apic_id_t x86_apicid_from_cpu_idx(X86CPUTopoInfo *topo_info, */ static inline bool x86_has_extended_topo(unsigned long *topo_bitmap) { - return test_bit(CPU_TOPO_LEVEL_MODULE, topo_bitmap) || - test_bit(CPU_TOPO_LEVEL_DIE, topo_bitmap); + return test_bit(CPU_TOPOLOGY_LEVEL_MODULE, topo_bitmap) || + test_bit(CPU_TOPOLOGY_LEVEL_DIE, topo_bitmap); } #endif /* HW_I386_TOPOLOGY_H */ diff --git a/qapi/machine-common.json b/qapi/machine-common.json index b64e4895cfd7..db3e499fb382 100644 --- a/qapi/machine-common.json +++ b/qapi/machine-common.json @@ -5,7 +5,7 @@ # See the COPYING file in the top-level directory. ## -# = Machines S390 data types +# = Common machine types ## ## @@ -18,3 +18,47 @@ ## { 'enum': 'S390CpuEntitlement', 'data': [ 'auto', 'low', 'medium', 'high' ] } + +## +# @CpuTopologyLevel: +# +# An enumeration of CPU topology levels. +# +# @invalid: Invalid topology level. +# +# @thread: thread level, which would also be called SMT level or +# logical processor level. The @threads option in +# SMPConfiguration is used to configure the topology of this +# level. +# +# @core: core level. The @cores option in SMPConfiguration is used +# to configure the topology of this level. +# +# @module: module level. The @modules option in SMPConfiguration is +# used to configure the topology of this level. +# +# @cluster: cluster level. The @clusters option in SMPConfiguration +# is used to configure the topology of this level. +# +# @die: die level. The @dies option in SMPConfiguration is used to +# configure the topology of this level. +# +# @socket: socket level, which would also be called package level. +# The @sockets option in SMPConfiguration is used to configure +# the topology of this level. +# +# @book: book level. The @books option in SMPConfiguration is used +# to configure the topology of this level. +# +# @drawer: drawer level. The @drawers option in SMPConfiguration is +# used to configure the topology of this level. +# +# @default: default level. Some architectures will have default +# topology settings (e.g., cache topology), and this special +# level means following the architecture-specific settings. +# +# Since: 9.2 +## +{ 'enum': 'CpuTopologyLevel', + 'data': [ 'invalid', 'thread', 'core', 'module', 'cluster', + 'die', 'socket', 'book', 'drawer', 'default' ] } diff --git a/target/i386/cpu.c b/target/i386/cpu.c index ff227a8c5c87..c84e32c9c303 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -236,23 +236,23 @@ static uint8_t cpuid2_cache_descriptor(CPUCacheInfo *cache) 0 /* Invalid value */) static uint32_t max_thread_ids_for_cache(X86CPUTopoInfo *topo_info, - enum CPUTopoLevel share_level) + enum CpuTopologyLevel share_level) { uint32_t num_ids = 0; switch (share_level) { - case CPU_TOPO_LEVEL_CORE: + case CPU_TOPOLOGY_LEVEL_CORE: num_ids = 1 << apicid_core_offset(topo_info); break; - case CPU_TOPO_LEVEL_DIE: + case CPU_TOPOLOGY_LEVEL_DIE: num_ids = 1 << apicid_die_offset(topo_info); break; - case CPU_TOPO_LEVEL_PACKAGE: + case CPU_TOPOLOGY_LEVEL_SOCKET: num_ids = 1 << apicid_pkg_offset(topo_info); break; default: /* - * Currently there is no use case for SMT and MODULE, so use + * Currently there is no use case for THREAD and MODULE, so use * assert directly to facilitate debugging. */ g_assert_not_reached(); @@ -301,19 +301,19 @@ static void encode_cache_cpuid4(CPUCacheInfo *cache, } static uint32_t num_threads_by_topo_level(X86CPUTopoInfo *topo_info, - enum CPUTopoLevel topo_level) + enum CpuTopologyLevel topo_level) { switch (topo_level) { - case CPU_TOPO_LEVEL_SMT: + case CPU_TOPOLOGY_LEVEL_THREAD: return 1; - case CPU_TOPO_LEVEL_CORE: + case CPU_TOPOLOGY_LEVEL_CORE: return topo_info->threads_per_core; - case CPU_TOPO_LEVEL_MODULE: + case CPU_TOPOLOGY_LEVEL_MODULE: return topo_info->threads_per_core * topo_info->cores_per_module; - case CPU_TOPO_LEVEL_DIE: + case CPU_TOPOLOGY_LEVEL_DIE: return topo_info->threads_per_core * topo_info->cores_per_module * topo_info->modules_per_die; - case CPU_TOPO_LEVEL_PACKAGE: + case CPU_TOPOLOGY_LEVEL_SOCKET: return topo_info->threads_per_core * topo_info->cores_per_module * topo_info->modules_per_die * topo_info->dies_per_pkg; default: @@ -323,18 +323,18 @@ static uint32_t num_threads_by_topo_level(X86CPUTopoInfo *topo_info, } static uint32_t apicid_offset_by_topo_level(X86CPUTopoInfo *topo_info, - enum CPUTopoLevel topo_level) + enum CpuTopologyLevel topo_level) { switch (topo_level) { - case CPU_TOPO_LEVEL_SMT: + case CPU_TOPOLOGY_LEVEL_THREAD: return 0; - case CPU_TOPO_LEVEL_CORE: + case CPU_TOPOLOGY_LEVEL_CORE: return apicid_core_offset(topo_info); - case CPU_TOPO_LEVEL_MODULE: + case CPU_TOPOLOGY_LEVEL_MODULE: return apicid_module_offset(topo_info); - case CPU_TOPO_LEVEL_DIE: + case CPU_TOPOLOGY_LEVEL_DIE: return apicid_die_offset(topo_info); - case CPU_TOPO_LEVEL_PACKAGE: + case CPU_TOPOLOGY_LEVEL_SOCKET: return apicid_pkg_offset(topo_info); default: g_assert_not_reached(); @@ -342,18 +342,18 @@ static uint32_t apicid_offset_by_topo_level(X86CPUTopoInfo *topo_info, return 0; } -static uint32_t cpuid1f_topo_type(enum CPUTopoLevel topo_level) +static uint32_t cpuid1f_topo_type(enum CpuTopologyLevel topo_level) { switch (topo_level) { - case CPU_TOPO_LEVEL_INVALID: + case CPU_TOPOLOGY_LEVEL_INVALID: return CPUID_1F_ECX_TOPO_LEVEL_INVALID; - case CPU_TOPO_LEVEL_SMT: + case CPU_TOPOLOGY_LEVEL_THREAD: return CPUID_1F_ECX_TOPO_LEVEL_SMT; - case CPU_TOPO_LEVEL_CORE: + case CPU_TOPOLOGY_LEVEL_CORE: return CPUID_1F_ECX_TOPO_LEVEL_CORE; - case CPU_TOPO_LEVEL_MODULE: + case CPU_TOPOLOGY_LEVEL_MODULE: return CPUID_1F_ECX_TOPO_LEVEL_MODULE; - case CPU_TOPO_LEVEL_DIE: + case CPU_TOPOLOGY_LEVEL_DIE: return CPUID_1F_ECX_TOPO_LEVEL_DIE; default: /* Other types are not supported in QEMU. */ @@ -371,16 +371,16 @@ static void encode_topo_cpuid1f(CPUX86State *env, uint32_t count, unsigned long level, next_level; uint32_t num_threads_next_level, offset_next_level; - assert(count + 1 < CPU_TOPO_LEVEL_MAX); + assert(count + 1 < CPU_TOPOLOGY_LEVEL__MAX); /* * Find the No.(count + 1) topology level in avail_cpu_topo bitmap. - * The search starts from bit 1 (CPU_TOPO_LEVEL_INVALID + 1). + * The search starts from bit 1 (CPU_TOPOLOGY_LEVEL_INVALID + 1). */ - level = CPU_TOPO_LEVEL_INVALID; + level = CPU_TOPOLOGY_LEVEL_INVALID; for (int i = 0; i <= count; i++) { level = find_next_bit(env->avail_cpu_topo, - CPU_TOPO_LEVEL_PACKAGE, + CPU_TOPOLOGY_LEVEL_SOCKET, level + 1); /* @@ -388,18 +388,18 @@ static void encode_topo_cpuid1f(CPUX86State *env, uint32_t count, * and it just encodes the invalid level (all fields are 0) * into the last subleaf of 0x1f. */ - if (level == CPU_TOPO_LEVEL_PACKAGE) { - level = CPU_TOPO_LEVEL_INVALID; + if (level == CPU_TOPOLOGY_LEVEL_SOCKET) { + level = CPU_TOPOLOGY_LEVEL_INVALID; break; } } - if (level == CPU_TOPO_LEVEL_INVALID) { + if (level == CPU_TOPOLOGY_LEVEL_INVALID) { num_threads_next_level = 0; offset_next_level = 0; } else { next_level = find_next_bit(env->avail_cpu_topo, - CPU_TOPO_LEVEL_PACKAGE, + CPU_TOPOLOGY_LEVEL_SOCKET, level + 1); num_threads_next_level = num_threads_by_topo_level(topo_info, next_level); @@ -575,7 +575,7 @@ static CPUCacheInfo legacy_l1d_cache = { .sets = 64, .partitions = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /*FIXME: CPUID leaf 0x80000005 is inconsistent with leaves 2 & 4 */ @@ -590,7 +590,7 @@ static CPUCacheInfo legacy_l1d_cache_amd = { .partitions = 1, .lines_per_tag = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /* L1 instruction cache: */ @@ -604,7 +604,7 @@ static CPUCacheInfo legacy_l1i_cache = { .sets = 64, .partitions = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /*FIXME: CPUID leaf 0x80000005 is inconsistent with leaves 2 & 4 */ @@ -619,7 +619,7 @@ static CPUCacheInfo legacy_l1i_cache_amd = { .partitions = 1, .lines_per_tag = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /* Level 2 unified cache: */ @@ -633,7 +633,7 @@ static CPUCacheInfo legacy_l2_cache = { .sets = 4096, .partitions = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /*FIXME: CPUID leaf 2 descriptor is inconsistent with CPUID leaf 4 */ @@ -643,7 +643,7 @@ static CPUCacheInfo legacy_l2_cache_cpuid2 = { .size = 2 * MiB, .line_size = 64, .associativity = 8, - .share_level = CPU_TOPO_LEVEL_INVALID, + .share_level = CPU_TOPOLOGY_LEVEL_INVALID, }; @@ -657,7 +657,7 @@ static CPUCacheInfo legacy_l2_cache_amd = { .associativity = 16, .sets = 512, .partitions = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }; /* Level 3 unified cache: */ @@ -673,7 +673,7 @@ static CPUCacheInfo legacy_l3_cache = { .self_init = true, .inclusive = true, .complex_indexing = true, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }; /* TLB definitions: */ @@ -2017,7 +2017,7 @@ static const CPUCaches epyc_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2030,7 +2030,7 @@ static const CPUCaches epyc_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2041,7 +2041,7 @@ static const CPUCaches epyc_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2055,7 +2055,7 @@ static const CPUCaches epyc_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = true, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2071,7 +2071,7 @@ static CPUCaches epyc_v4_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2084,7 +2084,7 @@ static CPUCaches epyc_v4_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2095,7 +2095,7 @@ static CPUCaches epyc_v4_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2109,7 +2109,7 @@ static CPUCaches epyc_v4_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = false, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2125,7 +2125,7 @@ static const CPUCaches epyc_rome_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2138,7 +2138,7 @@ static const CPUCaches epyc_rome_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2149,7 +2149,7 @@ static const CPUCaches epyc_rome_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2163,7 +2163,7 @@ static const CPUCaches epyc_rome_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = true, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2179,7 +2179,7 @@ static const CPUCaches epyc_rome_v3_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2192,7 +2192,7 @@ static const CPUCaches epyc_rome_v3_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2203,7 +2203,7 @@ static const CPUCaches epyc_rome_v3_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2217,7 +2217,7 @@ static const CPUCaches epyc_rome_v3_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = false, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2233,7 +2233,7 @@ static const CPUCaches epyc_milan_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2246,7 +2246,7 @@ static const CPUCaches epyc_milan_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2257,7 +2257,7 @@ static const CPUCaches epyc_milan_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2271,7 +2271,7 @@ static const CPUCaches epyc_milan_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = true, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2287,7 +2287,7 @@ static const CPUCaches epyc_milan_v2_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2300,7 +2300,7 @@ static const CPUCaches epyc_milan_v2_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2311,7 +2311,7 @@ static const CPUCaches epyc_milan_v2_cache_info = { .partitions = 1, .sets = 1024, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2325,7 +2325,7 @@ static const CPUCaches epyc_milan_v2_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = false, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -2341,7 +2341,7 @@ static const CPUCaches epyc_genoa_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l1i_cache = &(CPUCacheInfo) { .type = INSTRUCTION_CACHE, @@ -2354,7 +2354,7 @@ static const CPUCaches epyc_genoa_cache_info = { .lines_per_tag = 1, .self_init = 1, .no_invd_sharing = true, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l2_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2365,7 +2365,7 @@ static const CPUCaches epyc_genoa_cache_info = { .partitions = 1, .sets = 2048, .lines_per_tag = 1, - .share_level = CPU_TOPO_LEVEL_CORE, + .share_level = CPU_TOPOLOGY_LEVEL_CORE, }, .l3_cache = &(CPUCacheInfo) { .type = UNIFIED_CACHE, @@ -2379,7 +2379,7 @@ static const CPUCaches epyc_genoa_cache_info = { .self_init = true, .inclusive = true, .complex_indexing = false, - .share_level = CPU_TOPO_LEVEL_DIE, + .share_level = CPU_TOPOLOGY_LEVEL_DIE, }, }; @@ -6507,7 +6507,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, /* Share the cache at package level. */ *eax |= max_thread_ids_for_cache(&topo_info, - CPU_TOPO_LEVEL_PACKAGE) << 14; + CPU_TOPOLOGY_LEVEL_SOCKET) << 14; } } } else if (cpu->vendor_cpuid_only && IS_AMD_CPU(env)) { @@ -7992,10 +7992,10 @@ static void x86_cpu_init_default_topo(X86CPU *cpu) env->nr_modules = 1; env->nr_dies = 1; - /* SMT, core and package levels are set by default. */ - set_bit(CPU_TOPO_LEVEL_SMT, env->avail_cpu_topo); - set_bit(CPU_TOPO_LEVEL_CORE, env->avail_cpu_topo); - set_bit(CPU_TOPO_LEVEL_PACKAGE, env->avail_cpu_topo); + /* thread, core and socket levels are set by default. */ + set_bit(CPU_TOPOLOGY_LEVEL_THREAD, env->avail_cpu_topo); + set_bit(CPU_TOPOLOGY_LEVEL_CORE, env->avail_cpu_topo); + set_bit(CPU_TOPOLOGY_LEVEL_SOCKET, env->avail_cpu_topo); } static void x86_cpu_initfn(Object *obj) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 9c39384ac0aa..34289994082d 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1660,7 +1660,7 @@ typedef struct CPUCacheInfo { * Used to encode CPUID[4].EAX[bits 25:14] or * CPUID[0x8000001D].EAX[bits 25:14]. */ - enum CPUTopoLevel share_level; + CpuTopologyLevel share_level; } CPUCacheInfo; @@ -1990,7 +1990,7 @@ typedef struct CPUArchState { unsigned nr_modules; /* Bitmap of available CPU topology levels for this CPU. */ - DECLARE_BITMAP(avail_cpu_topo, CPU_TOPO_LEVEL_MAX); + DECLARE_BITMAP(avail_cpu_topo, CPU_TOPOLOGY_LEVEL__MAX); } CPUX86State; struct kvm_msrs; From patchwork Sat Oct 12 10:44:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833606 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 5ED8FCF2560 for ; Sat, 12 Oct 2024 10:30:08 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZMe-0003or-P2; 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X-CSE-ConnectionGUID: +rePxvAERA+TOz5MOKt57w== X-CSE-MsgGUID: o+7qJdf6TH6wcY9EWcccuQ== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634868" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634868" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:28:43 -0700 X-CSE-ConnectionGUID: D+s2MWIpRSSy0y7cNiepRg== X-CSE-MsgGUID: 8vw5maFpTGW+YxivpAyN6A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050832" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:28:37 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 2/7] qapi/qom: Define cache enumeration and properties for machine Date: Sat, 12 Oct 2024 18:44:24 +0800 Message-Id: <20241012104429.1048908-3-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The x86 and ARM need to allow user to configure cache properties (current only topology): * For x86, the default cache topology model (of max/host CPU) does not always match the Host's real physical cache topology. Performance can increase when the configured virtual topology is closer to the physical topology than a default topology would be. * For ARM, QEMU can't get the cache topology information from the CPU registers, then user configuration is necessary. Additionally, the cache information is also needed for MPAM emulation (for TCG) to build the right PPTT. Define smp-cache related enumeration and properties in QAPI, so that user could configure cache properties for SMP system through -machine in the subsequent patch. Cache enumeration (CacheLevelAndType) is implemented as the combination of cache level (level 1/2/3) and cache type (data/instruction/unified). Currently, separated L1 cache (L1 data cache and L1 instruction cache) with unified higher-level cache (e.g., unified L2 and L3 caches), is the most common cache architectures. Therefore, enumerate the L1 D-cache, L1 I-cache, L2 cache and L3 cache with smp-cache object to add the basic cache topology support. Other kinds of caches (e.g., L1 unified or L2/L3 separated caches) can be added directly into CacheLevelAndType if necessary. Cache properties (SmpCacheProperties) currently only contains cache topology information, and other cache properties can be added in it if necessary. Note, define cache topology based on CPU topology level with two reasons: 1. In practice, a cache will always be bound to the CPU container (either private in the CPU container or shared among multiple containers), and CPU container is often expressed in terms of CPU topology level. 2. The x86's cache-related CPUIDs encode cache topology based on APIC ID's CPU topology layout. And the ACPI PPTT table that ARM/RISCV relies on also requires CPU containers to help indicate the private shared hierarchy of the cache. Therefore, for SMP systems, it is natural to use the CPU topology hierarchy directly in QEMU to define the cache topology. With smp-cache QAPI support, add smp cache topology for machine by parsing the smp-cache object list. Also add a helper to access cache topology level of machine. Suggested-by: Daniel P. Berrange Signed-off-by: Zhao Liu Tested-by: Yongwei Ma Reviewed-by: Jonathan Cameron --- Suggested by credit: * Referred to Daniel's suggestion to introduce cache object list. --- Changes since Patch v2: * Updated version of new QAPI structures to v9.2. (Jonathan) * Merged the folloup commit ("hw/core: Add smp cache topology for machine") into this patch as the use case of smp-cache QAPI. (Jonathan) * Optimized the error_message line breaks to be more grep-friendly. (Jonathan) * Reduced unnecessary "else" in machine_parse_smp_cache. (Jonathan) Changes since Patch v1: * Renamed SMPCacheProperty/SMPCacheProperties (QAPI structures) to SmpCacheProperties/SmpCachePropertiesWrapper. (Markus) * Renamed SMPCacheName (QAPI structure) to SmpCacheLevelAndType and dropped prefix. (Markus) * Renamed 'name' field in SmpCacheProperties to 'cache', since the type and level of the cache in SMP system could be able to specify all of these kinds of cache explicitly enough. * Renamed 'topo' field in SmpCacheProperties to 'topology'. (Markus) * Returned error information when user repeats setting cache properties. (Markus) * Renamed SmpCacheLevelAndType to CacheLevelAndType, since this representation is general across SMP or hybrid system. * Dropped handwriten smp-cache object and integrated cache pproperties list into MachineState (in next patch). (Markus) * Added the reason why x86 and ARM need to configure cache information. (Markus and Jonathan) Changes since RFC v2: * New commit to implement cache list with JSON format instead of multiple sub-options in -smp. --- hw/core/machine-smp.c | 40 ++++++++++++++++++++++++++++++++ hw/core/machine.c | 44 +++++++++++++++++++++++++++++++++++ include/hw/boards.h | 10 ++++++++ qapi/machine-common.json | 50 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 144 insertions(+) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index 5d8d7edcbd3f..1ce7be902e6e 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -261,6 +261,40 @@ void machine_parse_smp_config(MachineState *ms, } } +bool machine_parse_smp_cache(MachineState *ms, + const SmpCachePropertiesList *caches, + Error **errp) +{ + const SmpCachePropertiesList *node; + DECLARE_BITMAP(caches_bitmap, CACHE_LEVEL_AND_TYPE__MAX); + + for (node = caches; node; node = node->next) { + /* Prohibit users from setting the cache topology level to invalid. */ + if (node->value->topology == CPU_TOPOLOGY_LEVEL_INVALID) { + error_setg(errp, + "Invalid cache topology level: %s. " + "The topology should match valid CPU topology level", + CpuTopologyLevel_str(node->value->topology)); + return false; + } + + /* Prohibit users from repeating settings. */ + if (test_bit(node->value->cache, caches_bitmap)) { + error_setg(errp, + "Invalid cache properties: %s. " + "The cache properties are duplicated", + CacheLevelAndType_str(node->value->cache)); + return false; + } + + ms->smp_cache.props[node->value->cache].topology = + node->value->topology; + set_bit(node->value->cache, caches_bitmap); + } + + return true; +} + unsigned int machine_topo_get_cores_per_socket(const MachineState *ms) { return ms->smp.cores * ms->smp.modules * ms->smp.clusters * ms->smp.dies; @@ -270,3 +304,9 @@ unsigned int machine_topo_get_threads_per_socket(const MachineState *ms) { return ms->smp.threads * machine_topo_get_cores_per_socket(ms); } + +CpuTopologyLevel machine_get_cache_topo_level(const MachineState *ms, + CacheLevelAndType cache) +{ + return ms->smp_cache.props[cache].topology; +} diff --git a/hw/core/machine.c b/hw/core/machine.c index adaba17ebac1..518beb9f883a 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -932,6 +932,40 @@ static void machine_set_smp(Object *obj, Visitor *v, const char *name, machine_parse_smp_config(ms, config, errp); } +static void machine_get_smp_cache(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MachineState *ms = MACHINE(obj); + SmpCache *cache = &ms->smp_cache; + SmpCachePropertiesList *head = NULL; + SmpCachePropertiesList **tail = &head; + + for (int i = 0; i < CACHE_LEVEL_AND_TYPE__MAX; i++) { + SmpCacheProperties *node = g_new(SmpCacheProperties, 1); + + node->cache = cache->props[i].cache; + node->topology = cache->props[i].topology; + QAPI_LIST_APPEND(tail, node); + } + + visit_type_SmpCachePropertiesList(v, name, &head, errp); + qapi_free_SmpCachePropertiesList(head); +} + +static void machine_set_smp_cache(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MachineState *ms = MACHINE(obj); + SmpCachePropertiesList *caches; + + if (!visit_type_SmpCachePropertiesList(v, name, &caches, errp)) { + return; + } + + machine_parse_smp_cache(ms, caches, errp); + qapi_free_SmpCachePropertiesList(caches); +} + static void machine_get_boot(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { @@ -1057,6 +1091,11 @@ static void machine_class_init(ObjectClass *oc, void *data) object_class_property_set_description(oc, "smp", "CPU topology"); + object_class_property_add(oc, "smp-cache", "SmpCachePropertiesWrapper", + machine_get_smp_cache, machine_set_smp_cache, NULL, NULL); + object_class_property_set_description(oc, "smp-cache", + "Cache properties list for SMP machine"); + object_class_property_add(oc, "phandle-start", "int", machine_get_phandle_start, machine_set_phandle_start, NULL, NULL); @@ -1195,6 +1234,11 @@ static void machine_initfn(Object *obj) ms->smp.cores = 1; ms->smp.threads = 1; + for (int i = 0; i < CACHE_LEVEL_AND_TYPE__MAX; i++) { + ms->smp_cache.props[i].cache = (CacheLevelAndType)i; + ms->smp_cache.props[i].topology = CPU_TOPOLOGY_LEVEL_DEFAULT; + } + machine_copy_boot_config(ms, &(BootConfiguration){ 0 }); } diff --git a/include/hw/boards.h b/include/hw/boards.h index 5966069baab3..0729066e353a 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -44,8 +44,13 @@ void machine_set_cpu_numa_node(MachineState *machine, Error **errp); void machine_parse_smp_config(MachineState *ms, const SMPConfiguration *config, Error **errp); +bool machine_parse_smp_cache(MachineState *ms, + const SmpCachePropertiesList *caches, + Error **errp); unsigned int machine_topo_get_cores_per_socket(const MachineState *ms); unsigned int machine_topo_get_threads_per_socket(const MachineState *ms); +CpuTopologyLevel machine_get_cache_topo_level(const MachineState *ms, + CacheLevelAndType cache); void machine_memory_devices_init(MachineState *ms, hwaddr base, uint64_t size); /** @@ -369,6 +374,10 @@ typedef struct CpuTopology { unsigned int max_cpus; } CpuTopology; +typedef struct SmpCache { + SmpCacheProperties props[CACHE_LEVEL_AND_TYPE__MAX]; +} SmpCache; + /** * MachineState: */ @@ -419,6 +428,7 @@ struct MachineState { AccelState *accelerator; CPUArchIdList *possible_cpus; CpuTopology smp; + SmpCache smp_cache; struct NVDIMMState *nvdimms_state; struct NumaState *numa_state; }; diff --git a/qapi/machine-common.json b/qapi/machine-common.json index db3e499fb382..b780440c7ec6 100644 --- a/qapi/machine-common.json +++ b/qapi/machine-common.json @@ -62,3 +62,53 @@ { 'enum': 'CpuTopologyLevel', 'data': [ 'invalid', 'thread', 'core', 'module', 'cluster', 'die', 'socket', 'book', 'drawer', 'default' ] } + +## +# @CacheLevelAndType: +# +# Caches a system may have. The enumeration value here is the +# combination of cache level and cache type. +# +# @l1d: L1 data cache. +# +# @l1i: L1 instruction cache. +# +# @l2: L2 (unified) cache. +# +# @l3: L3 (unified) cache +# +# Since: 9.2 +## +{ 'enum': 'CacheLevelAndType', + 'data': [ 'l1d', 'l1i', 'l2', 'l3' ] } + +## +# @SmpCacheProperties: +# +# Cache information for SMP system. +# +# @cache: Cache name, which is the combination of cache level +# and cache type. +# +# @topology: Cache topology level. It accepts the CPU topology +# enumeration as the parameter, i.e., CPUs in the same +# topology container share the same cache. +# +# Since: 9.2 +## +{ 'struct': 'SmpCacheProperties', + 'data': { + 'cache': 'CacheLevelAndType', + 'topology': 'CpuTopologyLevel' } } + +## +# @SmpCachePropertiesWrapper: +# +# List wrapper of SmpCacheProperties. +# +# @caches: the list of SmpCacheProperties. +# +# Since 9.2 +## +{ 'struct': 'SmpCachePropertiesWrapper', + 'data': { 'caches': ['SmpCacheProperties'] } } From patchwork Sat Oct 12 10:44:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833607 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 B15F5CF2565 for ; Sat, 12 Oct 2024 10:30:10 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZMj-0003qF-FU; Sat, 12 Oct 2024 06:28:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMh-0003pi-In; Sat, 12 Oct 2024 06:28:51 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMf-0007EI-Qq; Sat, 12 Oct 2024 06:28:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728930; x=1760264930; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=J9p7Tdz/CDqM2wDqm/4H38Zb2VvdiGGpmWwRSF8KKYc=; b=TJCg3mzyIFTA4jWOwvoHeh/ToeW3OAJ6edCeWc94IDadbQRu3wH+DL1g XvNq/XSOubbNSUouTQGvEt14PznecV4YrV53t1Jp8YAiwj02AtxqWj1Vr 0QycBvAC4j5hyCD+lqhcSlXLRIQ0vithM0dOiqr0FyRjD3GrXPhbYVkP6 6Cy/eZGI+ZBi+zReKs7Wj3YtNhcKWu7VdSb8u9Ehqr9/cCsy1PEJDQlV5 etljNtOsYKjxdu0CvU0StJF7XRUAzDScy7Bs2qqqn8g/WT0dkJWCrBp1s Bu/6Jo2wQcxTn6TgNf6W2kPdM4SEZXX/kQ9s7ATQyFuMQwqsCDFVCRAgp g==; X-CSE-ConnectionGUID: UvxqGWOYSXKFUbFwkvWufQ== X-CSE-MsgGUID: 9cSbaW7kRKagSVyr0rE//Q== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634880" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634880" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:28:48 -0700 X-CSE-ConnectionGUID: 8jua+y5vSJuF4yaj4EUEng== X-CSE-MsgGUID: 7F/JJOcZQjWrB5yLRjPEeQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050845" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:28:43 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 3/7] hw/core: Check smp cache topology support for machine Date: Sat, 12 Oct 2024 18:44:25 +0800 Message-Id: <20241012104429.1048908-4-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add cache_supported flags in SMPCompatProps to allow machines to configure various caches support. And check the compatibility of the cache properties with the machine support in machine_parse_smp_cache(). Signed-off-by: Zhao Liu Tested-by: Yongwei Ma Reviewed-by: Jonathan Cameron --- Changes since Patch v2: * Polished the comment of "default" level check. (Jonathan) * Reduced short line wrap. (Jonathan) Changes since Patch v1: * Dropped machine_check_smp_cache_support() and did the check when -machine parses smp-cache in machine_parse_smp_cache(). Changes since RFC v2: * Split as a separate commit to just include compatibility checking and topology checking. * Allow setting "default" topology level even though the cache isn't supported by machine. (Daniel) --- hw/core/machine-smp.c | 75 +++++++++++++++++++++++++++++++++++++++++++ include/hw/boards.h | 3 ++ 2 files changed, 78 insertions(+) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index 1ce7be902e6e..f3edbded2e7b 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -261,10 +261,47 @@ void machine_parse_smp_config(MachineState *ms, } } +static bool machine_check_topo_support(MachineState *ms, + CpuTopologyLevel topo, + Error **errp) +{ + MachineClass *mc = MACHINE_GET_CLASS(ms); + + if ((topo == CPU_TOPOLOGY_LEVEL_MODULE && !mc->smp_props.modules_supported) || + (topo == CPU_TOPOLOGY_LEVEL_CLUSTER && !mc->smp_props.clusters_supported) || + (topo == CPU_TOPOLOGY_LEVEL_DIE && !mc->smp_props.dies_supported) || + (topo == CPU_TOPOLOGY_LEVEL_BOOK && !mc->smp_props.books_supported) || + (topo == CPU_TOPOLOGY_LEVEL_DRAWER && !mc->smp_props.drawers_supported)) { + error_setg(errp, + "Invalid topology level: %s. " + "The topology level is not supported by this machine", + CpuTopologyLevel_str(topo)); + return false; + } + + return true; +} + +/* + * When both cache1 and cache2 are configured with specific topology levels + * (not default level), is cache1's topology level higher than cache2? + */ +static bool smp_cache_topo_cmp(const SmpCache *smp_cache, + CacheLevelAndType cache1, + CacheLevelAndType cache2) +{ + if (smp_cache->props[cache1].topology != CPU_TOPOLOGY_LEVEL_DEFAULT && + smp_cache->props[cache1].topology > smp_cache->props[cache2].topology) { + return true; + } + return false; +} + bool machine_parse_smp_cache(MachineState *ms, const SmpCachePropertiesList *caches, Error **errp) { + MachineClass *mc = MACHINE_GET_CLASS(ms); const SmpCachePropertiesList *node; DECLARE_BITMAP(caches_bitmap, CACHE_LEVEL_AND_TYPE__MAX); @@ -292,6 +329,44 @@ bool machine_parse_smp_cache(MachineState *ms, set_bit(node->value->cache, caches_bitmap); } + for (int i = 0; i < CACHE_LEVEL_AND_TYPE__MAX; i++) { + const SmpCacheProperties *props = &ms->smp_cache.props[i]; + + /* + * Reject non "default" topology level if the cache isn't + * supported by the machine. + */ + if (props->topology != CPU_TOPOLOGY_LEVEL_DEFAULT && + !mc->smp_props.cache_supported[props->cache]) { + error_setg(errp, + "%s cache topology not supported by this machine", + CacheLevelAndType_str(node->value->cache)); + return false; + } + + if (!machine_check_topo_support(ms, props->topology, errp)) { + return false; + } + } + + if (smp_cache_topo_cmp(&ms->smp_cache, CACHE_LEVEL_AND_TYPE_L1D, + CACHE_LEVEL_AND_TYPE_L2) || + smp_cache_topo_cmp(&ms->smp_cache, CACHE_LEVEL_AND_TYPE_L1I, + CACHE_LEVEL_AND_TYPE_L2)) { + error_setg(errp, + "Invalid smp cache topology. " + "L2 cache topology level shouldn't be lower than L1 cache"); + return false; + } + + if (smp_cache_topo_cmp(&ms->smp_cache, CACHE_LEVEL_AND_TYPE_L2, + CACHE_LEVEL_AND_TYPE_L3)) { + error_setg(errp, + "Invalid smp cache topology. " + "L3 cache topology level shouldn't be lower than L2 cache"); + return false; + } + return true; } diff --git a/include/hw/boards.h b/include/hw/boards.h index 0729066e353a..e4a1035e3fa1 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -151,6 +151,8 @@ typedef struct { * @books_supported - whether books are supported by the machine * @drawers_supported - whether drawers are supported by the machine * @modules_supported - whether modules are supported by the machine + * @cache_supported - whether cache (l1d, l1i, l2 and l3) configuration are + * supported by the machine */ typedef struct { bool prefer_sockets; @@ -160,6 +162,7 @@ typedef struct { bool books_supported; bool drawers_supported; bool modules_supported; + bool cache_supported[CACHE_LEVEL_AND_TYPE__MAX]; } SMPCompatProps; /** From patchwork Sat Oct 12 10:44:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833608 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 23621CF2564 for ; Sat, 12 Oct 2024 10:30:17 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZMo-0003sX-6m; Sat, 12 Oct 2024 06:28:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMm-0003rT-Qw; Sat, 12 Oct 2024 06:28:56 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMl-0007EI-B8; Sat, 12 Oct 2024 06:28:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728935; x=1760264935; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eGq2BnytsrQRn74+62hETUgMwOQV0zS4jkHL1KP2Mqs=; b=hCPhtqdPvtERumnDY64Nbws1ZKlDWMVZejEfSHqSKpGqC1eHlBmeQXEg U8vtHnTNykn+5HsmTLAWbH6Vx/MMPZ0OL4EX/C0IIxD2sJKIszQJhc3zB CH5g9Nfw5RT2hlUj1+DlrrbKeLAoXI4NI7kxnG7LJkV6fE7aAIolwi93g H9ARAoUBGidGyezK+xpn0idfhPtEHwPA73iGxhdxi7uFYjyB4EZhI5rpW nOsLdqKfv7+kxv9kUGGBlX2nmzHjc9RX6udyMUnGKmY9pcwcyAk4cQzTU Cc5pN4jJe+brwkEx2RoGWMGrbUxU8BNRtu/ZHPlO9492pHvHCrdaQueOA g==; X-CSE-ConnectionGUID: iGR3DCIvSD+HgiDOQFwoLg== X-CSE-MsgGUID: alhyEBJDQI+kqKEqiEM59w== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634899" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634899" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:28:54 -0700 X-CSE-ConnectionGUID: rjQu1VD/RciFLAyVibtHAw== X-CSE-MsgGUID: 5zW56g5hQ6mxOXFo7Uwd5w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050851" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:28:49 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 4/7] i386/cpu: Support thread and module level cache topology Date: Sat, 12 Oct 2024 18:44:26 +0800 Message-Id: <20241012104429.1048908-5-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Allow cache to be defined at the thread and module level. This increases flexibility for x86 users to customize their cache topology. Signed-off-by: Zhao Liu Tested-by: Yongwei Ma Reviewed-by: Jonathan Cameron --- target/i386/cpu.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c84e32c9c303..202bfe5086be 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -241,9 +241,15 @@ static uint32_t max_thread_ids_for_cache(X86CPUTopoInfo *topo_info, uint32_t num_ids = 0; switch (share_level) { + case CPU_TOPOLOGY_LEVEL_THREAD: + num_ids = 1; + break; case CPU_TOPOLOGY_LEVEL_CORE: num_ids = 1 << apicid_core_offset(topo_info); break; + case CPU_TOPOLOGY_LEVEL_MODULE: + num_ids = 1 << apicid_module_offset(topo_info); + break; case CPU_TOPOLOGY_LEVEL_DIE: num_ids = 1 << apicid_die_offset(topo_info); break; @@ -251,10 +257,6 @@ static uint32_t max_thread_ids_for_cache(X86CPUTopoInfo *topo_info, num_ids = 1 << apicid_pkg_offset(topo_info); break; default: - /* - * Currently there is no use case for THREAD and MODULE, so use - * assert directly to facilitate debugging. - */ g_assert_not_reached(); } From patchwork Sat Oct 12 10:44:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833605 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 1E811CF2565 for ; Sat, 12 Oct 2024 10:29:45 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZMt-0003uL-T7; Sat, 12 Oct 2024 06:29:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMs-0003tl-MP; Sat, 12 Oct 2024 06:29:02 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMr-0007EI-0E; Sat, 12 Oct 2024 06:29:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728941; x=1760264941; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hTwITS9Ep9g3JTsw1ONqb/mB140UzyU2nuvpNS9Faz0=; b=GdsSuvVozVQA+20jBkhEiYjsx1rmAepVLyxlzODW9ig7Pm/RquhfcxuE DtCqE2tByNawbnJ6SK7TGFFFRyTaU7K6YJykC/GTcAieNCDJ8DikFOoUA Mbjgm3mI5L9uTOjS/EsFuP1IXHrtT9ybx9EgecduVHPrEi+J1nShKpW5Z COYWE1xsOefgJstNFs8Wn11EAtTyY1SGC31hz4nzyJ7yuSrSOeSIQTwsx DiDpFismKbqkQX2zC8w/Kpdry/XPjDwXczGPxZsYQBsVzDSveLZkriiwl +oen/wEwjwwVTHRYHPxbKda4rd9YQoeIEg2beel2ck+TvqH8UVLAQtkK+ Q==; X-CSE-ConnectionGUID: +wDbS6gnRvW9knmixU4DMw== X-CSE-MsgGUID: pyCZ3X4zTxGcXzn4gblKOg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634921" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634921" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:29:00 -0700 X-CSE-ConnectionGUID: tTkP4fn+TRq8J33ibN7BkQ== X-CSE-MsgGUID: bzdAmRy2SkWle//aCvYwJw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050857" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:28:54 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 5/7] i386/cpu: Update cache topology with machine's configuration Date: Sat, 12 Oct 2024 18:44:27 +0800 Message-Id: <20241012104429.1048908-6-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org User will configure smp cache topology via -machine smp-cache. For this case, update the x86 CPUs' cache topology with user's configuration in MachineState. Signed-off-by: Zhao Liu Tested-by: Yongwei Ma Reviewed-by: Jonathan Cameron --- Changes since RFC v2: * Used smp_cache array to override cache topology. * Wrapped the updating into a function. --- target/i386/cpu.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 202bfe5086be..c8a04faf3764 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -7597,6 +7597,38 @@ static void x86_cpu_hyperv_realize(X86CPU *cpu) cpu->hyperv_limits[2] = 0; } +#ifndef CONFIG_USER_ONLY +static void x86_cpu_update_smp_cache_topo(MachineState *ms, X86CPU *cpu) +{ + CPUX86State *env = &cpu->env; + CpuTopologyLevel level; + + level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1D); + if (level != CPU_TOPOLOGY_LEVEL_DEFAULT) { + env->cache_info_cpuid4.l1d_cache->share_level = level; + env->cache_info_amd.l1d_cache->share_level = level; + } + + level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1I); + if (level != CPU_TOPOLOGY_LEVEL_DEFAULT) { + env->cache_info_cpuid4.l1i_cache->share_level = level; + env->cache_info_amd.l1i_cache->share_level = level; + } + + level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L2); + if (level != CPU_TOPOLOGY_LEVEL_DEFAULT) { + env->cache_info_cpuid4.l2_cache->share_level = level; + env->cache_info_amd.l2_cache->share_level = level; + } + + level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L3); + if (level != CPU_TOPOLOGY_LEVEL_DEFAULT) { + env->cache_info_cpuid4.l3_cache->share_level = level; + env->cache_info_amd.l3_cache->share_level = level; + } +} +#endif + static void x86_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); @@ -7821,6 +7853,13 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) #ifndef CONFIG_USER_ONLY MachineState *ms = MACHINE(qdev_get_machine()); + + /* + * TODO: Add a SMPCompatProps.has_caches flag to avoid useless Updates + * if user didn't set smp_cache. + */ + x86_cpu_update_smp_cache_topo(ms, cpu); + qemu_register_reset(x86_cpu_machine_reset_cb, cpu); if (cpu->env.features[FEAT_1_EDX] & CPUID_APIC || ms->smp.cpus > 1) { From patchwork Sat Oct 12 10:44:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833612 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 76E37CF2560 for ; Sat, 12 Oct 2024 10:31:57 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZN1-0003zJ-62; Sat, 12 Oct 2024 06:29:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMy-0003w4-GV; Sat, 12 Oct 2024 06:29:08 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZMw-0007EI-R0; Sat, 12 Oct 2024 06:29:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728947; x=1760264947; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=uqz0CxeEMFYodgXeRDwdMplzhXLtp/KziGXuIPivbUo=; b=fpiW9fxtgqK6xP1u1spfgqu9Nlh474HFs4ouLEiNmUec5E6TrbxLFN3D B62CFYHDOaM3jz9/jmy4wz/IVeXN4DYceOssZ/GRZy57Ex0GcZJnIHrpO ViKjRj9rHf4a0ykft/xOtEgaEsTCZCTbqlDYVw7BVE+aIbX/sAbzNGMkq dEQfUMrluBYLBPFQ/rATtr1XCTyzSgXs+kAdDgxn1jdoFvMKxWB3aic4l 39ABxyBbaI8UpNnB49UjvNmlXjbo6FYpdXz2660nCa4mkS0FBkGeAEjJs 3QCJf9SVkwgbDaIJuRthRjGsrZqD7OEFNucdNGMu/SXiNvZw96Hs15QFX g==; X-CSE-ConnectionGUID: sS7snSsdRoWjhfZlAFpvog== X-CSE-MsgGUID: OmEJkGhRSbmzB4nCBguA2w== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634943" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634943" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:29:05 -0700 X-CSE-ConnectionGUID: zpEiaCQ/TIq2/9zNkRBHqQ== X-CSE-MsgGUID: 3VXD5jpMQOiVZMGySxNoPw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050867" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:29:00 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu , Yongwei Ma Subject: [PATCH v3 6/7] i386/pc: Support cache topology in -machine for PC machine Date: Sat, 12 Oct 2024 18:44:28 +0800 Message-Id: <20241012104429.1048908-7-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Allow user to configure l1d, l1i, l2 and l3 cache topologies for PC machine. Additionally, add the document of "-machine smp-cache" in qemu-options.hx. Signed-off-by: Zhao Liu Tested-by: Yongwei Ma Reviewed-by: Jonathan Cameron --- Changes since Patch v2: * Polished the document. (Jonathan) Changes since Patch v1: * Merged document into this patch. (Markus) Changes since RFC v2: * Used cache_supported array. --- hw/i386/pc.c | 4 ++++ qemu-options.hx | 26 +++++++++++++++++++++++++- 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 2047633e4cf7..8aea2308dcb9 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1791,6 +1791,10 @@ static void pc_machine_class_init(ObjectClass *oc, void *data) mc->nvdimm_supported = true; mc->smp_props.dies_supported = true; mc->smp_props.modules_supported = true; + mc->smp_props.cache_supported[CACHE_LEVEL_AND_TYPE_L1D] = true; + mc->smp_props.cache_supported[CACHE_LEVEL_AND_TYPE_L1I] = true; + mc->smp_props.cache_supported[CACHE_LEVEL_AND_TYPE_L2] = true; + mc->smp_props.cache_supported[CACHE_LEVEL_AND_TYPE_L3] = true; mc->default_ram_id = "pc.ram"; pcmc->default_smbios_ep_type = SMBIOS_ENTRY_POINT_TYPE_AUTO; diff --git a/qemu-options.hx b/qemu-options.hx index d5afefe5b63c..8a0cd7393f34 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -39,7 +39,8 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ " memory-encryption=@var{} memory encryption object to use (default=none)\n" " hmat=on|off controls ACPI HMAT support (default=off)\n" " memory-backend='backend-id' specifies explicitly provided backend for main RAM (default=none)\n" - " cxl-fmw.0.targets.0=firsttarget,cxl-fmw.0.targets.1=secondtarget,cxl-fmw.0.size=size[,cxl-fmw.0.interleave-granularity=granularity]\n", + " cxl-fmw.0.targets.0=firsttarget,cxl-fmw.0.targets.1=secondtarget,cxl-fmw.0.size=size[,cxl-fmw.0.interleave-granularity=granularity]\n" + " smp-cache.0.cache=cachename,smp-cache.0.topology=topologylevel\n", QEMU_ARCH_ALL) SRST ``-machine [type=]name[,prop=value[,...]]`` @@ -159,6 +160,29 @@ SRST :: -machine cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.targets.1=cxl.1,cxl-fmw.0.size=128G,cxl-fmw.0.interleave-granularity=512 + + ``smp-cache.0.cache=cachename,smp-cache.0.topology=topologylevel`` + Define cache properties for SMP system. + + ``cache=cachename`` specifies the cache that the properties will be + applied on. This field is the combination of cache level and cache + type. It supports ``l1d`` (L1 data cache), ``l1i`` (L1 instruction + cache), ``l2`` (L2 unified cache) and ``l3`` (L3 unified cache). + + ``topology=topologylevel`` sets the cache topology level. It accepts + CPU topology levels including ``thread``, ``core``, ``module``, + ``cluster``, ``die``, ``socket``, ``book``, ``drawer`` and a special + value ``default``. If ``default`` is set, then the cache topology will + follow the architecture's default cache topology model. If another + topology level is set, the cache will be shared at corresponding CPU + topology level. For example, ``topology=core`` makes the cache shared + by all threads within a core. + + Example: + + :: + + -machine smp-cache.0.cache=l1d,smp-cache.0.topology=core,smp-cache.1.cache=l1i,smp-cache.1.topology=core ERST DEF("M", HAS_ARG, QEMU_OPTION_M, From patchwork Sat Oct 12 10:44:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhao Liu X-Patchwork-Id: 13833609 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 424C7CF2564 for ; Sat, 12 Oct 2024 10:30:53 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1szZN6-00048i-DE; Sat, 12 Oct 2024 06:29:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZN4-000462-1w; Sat, 12 Oct 2024 06:29:14 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1szZN2-0007EI-BH; Sat, 12 Oct 2024 06:29:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728728952; x=1760264952; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=i+35KcqWfRxigU2EIhaJxKdHSfXUSTicv5fw/oXO2lw=; b=Hg1adh+D2ZnAE62s5ucZGEZyNf3b1vMPZHKV7xpdzASKdpj9P4lxTJjN Y0q0ZzgxFMqMXQDA/fm7n7ZmingAL80eeSKRoOtdohZe3OLVSW/WAeGYL 9mBvSps2z7rZ9FxXeS1v8zh5ejfwYM3uiEk34bXmEdx9ibyuloK+HrUHD 8FFOkvc9Az01PJDcbqC3MVJetdMzSthP2W6OzFoNKOpXu1rdVcEOuGftM YLks3K9L/uD0DtQo+eZ4uBC5W+Bq0xBxXTR3sir0OsVOUUTOPiqILA3Xj ddyRb+vPg7+klDTyYbOjGJKHIC3qmsR5h51l0igE6GugwsKRSjPvRMVYz A==; X-CSE-ConnectionGUID: kTJweIsASxiXljiWZ6y6Zg== X-CSE-MsgGUID: ZcAUiWd8QO+rMf8ZasCQ7Q== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="45634956" X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="45634956" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2024 03:29:11 -0700 X-CSE-ConnectionGUID: iSUSYFKcSyyEaLI1013xMA== X-CSE-MsgGUID: WLmQSF1tQ+WlPwsdfAOydQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,198,1725346800"; d="scan'208";a="77050877" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.36]) by orviesa010.jf.intel.com with ESMTP; 12 Oct 2024 03:29:05 -0700 From: Zhao Liu To: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Igor Mammedov , Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-D?= =?utf-8?q?aud=C3=A9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Markus Armbruster , Marcelo Tosatti , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , Alireza Sanaee Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Zhao Liu Subject: [PATCH v3 7/7] i386/cpu: add has_caches flag to check smp_cache configuration Date: Sat, 12 Oct 2024 18:44:29 +0800 Message-Id: <20241012104429.1048908-8-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241012104429.1048908-1-zhao1.liu@intel.com> References: <20241012104429.1048908-1-zhao1.liu@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.15, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alireza Sanaee Add has_caches flag to SMPCompatProps, which helps in avoiding extra checks for every single layer of caches in x86 (and ARM in future). Signed-off-by: Alireza Sanaee Signed-off-by: Zhao Liu Reviewed-by: Jonathan Cameron --- Note: Picked from Alireza's series with the changes: * Moved the flag to SMPCompatProps with a new name "has_caches". This way, it remains consistent with the function and style of "has_clusters" in SMPCompatProps. * Dropped my previous TODO with the new flag. --- Changes since Patch v2: * Picked a new patch frome Alireza's ARM smp-cache series. --- hw/core/machine-smp.c | 2 ++ include/hw/boards.h | 3 +++ target/i386/cpu.c | 9 ++++----- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index f3edbded2e7b..16e456678cb6 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -367,6 +367,8 @@ bool machine_parse_smp_cache(MachineState *ms, return false; } + mc->smp_props.has_caches = true; + return true; } diff --git a/include/hw/boards.h b/include/hw/boards.h index e4a1035e3fa1..af62b09c89d1 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -153,6 +153,8 @@ typedef struct { * @modules_supported - whether modules are supported by the machine * @cache_supported - whether cache (l1d, l1i, l2 and l3) configuration are * supported by the machine + * @has_caches - whether cache properties are explicitly specified in the + * user provided smp-cache configuration */ typedef struct { bool prefer_sockets; @@ -163,6 +165,7 @@ typedef struct { bool drawers_supported; bool modules_supported; bool cache_supported[CACHE_LEVEL_AND_TYPE__MAX]; + bool has_caches; } SMPCompatProps; /** diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c8a04faf3764..6f711e98b527 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -7853,12 +7853,11 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) #ifndef CONFIG_USER_ONLY MachineState *ms = MACHINE(qdev_get_machine()); + MachineClass *mc = MACHINE_GET_CLASS(ms); - /* - * TODO: Add a SMPCompatProps.has_caches flag to avoid useless Updates - * if user didn't set smp_cache. - */ - x86_cpu_update_smp_cache_topo(ms, cpu); + if (mc->smp_props.has_caches) { + x86_cpu_update_smp_cache_topo(ms, cpu); + } qemu_register_reset(x86_cpu_machine_reset_cb, cpu);