From patchwork Mon Jul 20 05:41:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 11672871 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E61AC13A4 for ; Mon, 20 Jul 2020 05:43:42 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id BCDB520758 for ; Mon, 20 Jul 2020 05:43:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="NeOIZ56h" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BCDB520758 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:57442 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jxOaU-0008Ra-2m for patchwork-qemu-devel@patchwork.kernel.org; Mon, 20 Jul 2020 01:43:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48844) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jxOYY-0005hl-3b; Mon, 20 Jul 2020 01:41:42 -0400 Received: from bilbo.ozlabs.org ([203.11.71.1]:45213 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jxOYU-0005w6-5x; Mon, 20 Jul 2020 01:41:41 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 4B99Zf1jslz9sR4; Mon, 20 Jul 2020 15:41:29 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1595223690; bh=SoFDtUKbMTTP5vpI4nUoVVrIWAOlECjWo0U19O0woHM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NeOIZ56hiUSRK6cDTuV5/YJjbP3cAzIhjTDub5V25+AexeqWK4yAZ0liwjyoO6bER ZdLUO/pOiTAymEImz14KmnJj6Gljc8nJIqphc5xfmR6yjkkeP1KBczPjZBXh9nh1cy cCnGt6YtwF/D+Q+6t8xQGng968Pp6ElbhmhlBobo= From: David Gibson To: peter.maydell@linaro.org Subject: [PULL 3/4] spapr: Add a new level of NUMA for GPUs Date: Mon, 20 Jul 2020 15:41:25 +1000 Message-Id: <20200720054126.258032-4-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200720054126.258032-1-david@gibson.dropbear.id.au> References: <20200720054126.258032-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Received-SPF: pass client-ip=203.11.71.1; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/20 01:41:30 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Reza Arbab , David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, groug@kaod.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Reza Arbab NUMA nodes corresponding to GPU memory currently have the same affinity/distance as normal memory nodes. Add a third NUMA associativity reference point enabling us to give GPU nodes more distance. This is guest visible information, which shouldn't change under a running guest across migration between different qemu versions, so make the change effective only in new (pseries > 5.0) machine types. Before, `numactl -H` output in a guest with 4 GPUs (nodes 2-5): node distances: node 0 1 2 3 4 5 0: 10 40 40 40 40 40 1: 40 10 40 40 40 40 2: 40 40 10 40 40 40 3: 40 40 40 10 40 40 4: 40 40 40 40 10 40 5: 40 40 40 40 40 10 After: node distances: node 0 1 2 3 4 5 0: 10 40 80 80 80 80 1: 40 10 80 80 80 80 2: 80 80 10 80 80 80 3: 80 80 80 10 80 80 4: 80 80 80 80 10 80 5: 80 80 80 80 80 10 These are the same distances as on the host, mirroring the change made to host firmware in skiboot commit f845a648b8cb ("numa/associativity: Add a new level of NUMA for GPU's"). Signed-off-by: Reza Arbab Message-Id: <20200716225655.24289-1-arbab@linux.ibm.com> Signed-off-by: David Gibson --- hw/ppc/spapr.c | 21 +++++++++++++++++++-- hw/ppc/spapr_pci.c | 2 ++ hw/ppc/spapr_pci_nvlink2.c | 13 ++++++++++--- include/hw/pci-host/spapr.h | 1 + include/hw/ppc/spapr.h | 1 + 5 files changed, 33 insertions(+), 5 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 299908cc73..0ae293ec94 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -890,10 +890,16 @@ static int spapr_dt_rng(void *fdt) static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) { MachineState *ms = MACHINE(spapr); + SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms); int rtas; GString *hypertas = g_string_sized_new(256); GString *qemu_hypertas = g_string_sized_new(256); - uint32_t refpoints[] = { cpu_to_be32(0x4), cpu_to_be32(0x4) }; + uint32_t refpoints[] = { + cpu_to_be32(0x4), + cpu_to_be32(0x4), + cpu_to_be32(0x2), + }; + uint32_t nr_refpoints = ARRAY_SIZE(refpoints); uint64_t max_device_addr = MACHINE(spapr)->device_memory->base + memory_region_size(&MACHINE(spapr)->device_memory->mr); uint32_t lrdr_capacity[] = { @@ -945,8 +951,12 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) qemu_hypertas->str, qemu_hypertas->len)); g_string_free(qemu_hypertas, TRUE); + if (smc->pre_5_1_assoc_refpoints) { + nr_refpoints = 2; + } + _FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points", - refpoints, sizeof(refpoints))); + refpoints, nr_refpoints * sizeof(refpoints[0]))); _FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains", maxdomains, sizeof(maxdomains))); @@ -4584,9 +4594,16 @@ DEFINE_SPAPR_MACHINE(5_1, "5.1", true); */ static void spapr_machine_5_0_class_options(MachineClass *mc) { + SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc); + static GlobalProperty compat[] = { + { TYPE_SPAPR_PCI_HOST_BRIDGE, "pre-5.1-associativity", "on" }, + }; + spapr_machine_5_1_class_options(mc); compat_props_add(mc->compat_props, hw_compat_5_0, hw_compat_5_0_len); + compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat)); mc->numa_mem_supported = true; + smc->pre_5_1_assoc_refpoints = true; } DEFINE_SPAPR_MACHINE(5_0, "5.0", false); diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 21681215d4..363cdb3f7b 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -2089,6 +2089,8 @@ static Property spapr_phb_properties[] = { pcie_ecs, true), DEFINE_PROP_UINT64("gpa", SpaprPhbState, nv2_gpa_win_addr, 0), DEFINE_PROP_UINT64("atsd", SpaprPhbState, nv2_atsd_win_addr, 0), + DEFINE_PROP_BOOL("pre-5.1-associativity", SpaprPhbState, + pre_5_1_assoc, false), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c index dd8cd6db96..76ae77ebc8 100644 --- a/hw/ppc/spapr_pci_nvlink2.c +++ b/hw/ppc/spapr_pci_nvlink2.c @@ -362,9 +362,9 @@ void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt) &error_abort); uint32_t associativity[] = { cpu_to_be32(0x4), - SPAPR_GPU_NUMA_ID, - SPAPR_GPU_NUMA_ID, - SPAPR_GPU_NUMA_ID, + cpu_to_be32(nvslot->numa_id), + cpu_to_be32(nvslot->numa_id), + cpu_to_be32(nvslot->numa_id), cpu_to_be32(nvslot->numa_id) }; uint64_t size = object_property_get_uint(nv_mrobj, "size", NULL); @@ -375,6 +375,13 @@ void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt) _FDT(off); _FDT((fdt_setprop_string(fdt, off, "device_type", "memory"))); _FDT((fdt_setprop(fdt, off, "reg", mem_reg, sizeof(mem_reg)))); + + if (sphb->pre_5_1_assoc) { + associativity[1] = SPAPR_GPU_NUMA_ID; + associativity[2] = SPAPR_GPU_NUMA_ID; + associativity[3] = SPAPR_GPU_NUMA_ID; + } + _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity, sizeof(associativity)))); diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h index 8877ff51fb..600eb55c34 100644 --- a/include/hw/pci-host/spapr.h +++ b/include/hw/pci-host/spapr.h @@ -94,6 +94,7 @@ struct SpaprPhbState { hwaddr nv2_gpa_win_addr; hwaddr nv2_atsd_win_addr; SpaprPhbPciNvGpuConfig *nvgpus; + bool pre_5_1_assoc; }; #define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index c421410e3f..3134d339e8 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -129,6 +129,7 @@ struct SpaprMachineClass { bool linux_pci_probe; bool smp_threads_vsmt; /* set VSMT to smp_threads by default */ hwaddr rma_limit; /* clamp the RMA to this size */ + bool pre_5_1_assoc_refpoints; void (*phb_placement)(SpaprMachineState *spapr, uint32_t index, uint64_t *buid, hwaddr *pio,