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[23.128.96.18]) by mx.google.com with ESMTP id i2si14023455edu.358.2021.10.13.00.21.53; Wed, 13 Oct 2021 00:22:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230440AbhJMHUg (ORCPT + 99 others); Wed, 13 Oct 2021 03:20:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:37700 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230354AbhJMHTw (ORCPT ); Wed, 13 Oct 2021 03:19:52 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8B6A060EDF; Wed, 13 Oct 2021 07:17:42 +0000 (UTC) From: Huacai Chen To: Arnd Bergmann , Andy Lutomirski , Thomas Gleixner , Peter Zijlstra , Andrew Morton , David Airlie , Jonathan Corbet , Linus Torvalds Cc: linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Xuefeng Li , Yanteng Si , Huacai Chen , Jiaxun Yang , Huacai Chen Subject: [PATCH V5 21/22] LoongArch: Add Non-Uniform Memory Access (NUMA) support Date: Wed, 13 Oct 2021 15:11:16 +0800 Message-Id: <20211013071117.3097969-8-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211013071117.3097969-1-chenhuacai@loongson.cn> References: <20211013063656.3084555-1-chenhuacai@loongson.cn> <20211013071117.3097969-1-chenhuacai@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds Non-Uniform Memory Access (NUMA) support for LoongArch. LoongArch has 48-bit physical address, but the HT I/O bus only support 40-bit address, so we need a custom phys_to_dma() and dma_to_phys() to extract the 4-bit node id (bit 44~47) from Loongson-3's 48-bit physical address space and embed it into 40-bit. In the 40-bit dma address, node id offset can be read from the LS7A_DMA_CFG register. Signed-off-by: Huacai Chen --- arch/loongarch/Kconfig | 38 ++ arch/loongarch/include/asm/bootinfo.h | 1 + arch/loongarch/include/asm/dma-direct.h | 11 + arch/loongarch/include/asm/mmzone.h | 18 + arch/loongarch/include/asm/numa.h | 69 ++++ arch/loongarch/include/asm/pgtable.h | 12 + arch/loongarch/include/asm/topology.h | 21 ++ arch/loongarch/kernel/Makefile | 2 + arch/loongarch/kernel/acpi.c | 96 +++++ arch/loongarch/kernel/dma.c | 40 ++ arch/loongarch/kernel/module.c | 1 + arch/loongarch/kernel/numa.c | 482 ++++++++++++++++++++++++ arch/loongarch/kernel/setup.c | 8 +- arch/loongarch/kernel/smp.c | 35 +- arch/loongarch/kernel/topology.c | 5 + arch/loongarch/mm/init.c | 30 ++ arch/loongarch/pci/acpi.c | 3 + arch/loongarch/pci/pci.c | 8 +- 18 files changed, 873 insertions(+), 7 deletions(-) create mode 100644 arch/loongarch/include/asm/dma-direct.h create mode 100644 arch/loongarch/include/asm/mmzone.h create mode 100644 arch/loongarch/include/asm/numa.h create mode 100644 arch/loongarch/kernel/dma.c create mode 100644 arch/loongarch/kernel/numa.c diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 45df6223ee9e..15b922569a16 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -6,6 +6,7 @@ config LOONGARCH select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI select ARCH_BINFMT_ELF_STATE select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_INLINE_READ_LOCK if !PREEMPTION @@ -40,6 +41,7 @@ config LOONGARCH select ARCH_SUPPORTS_ACPI select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_HUGETLBFS + select ARCH_SUPPORTS_NUMA_BALANCING select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF select ARCH_USE_QUEUED_RWLOCKS @@ -303,6 +305,37 @@ config NR_CPUS This allows you to specify the maximum number of CPUs which this kernel will support. +config NUMA + bool "NUMA Support" + select ACPI_NUMA if ACPI + help + Say Y to compile the kernel to support NUMA (Non-Uniform Memory + Access). This option improves performance on systems with more + than two nodes; on two node systems it is generally better to + leave it disabled; on single node systems disable this option + disabled. + +config NODES_SHIFT + int + default "6" + depends on NUMA + +config USE_PERCPU_NUMA_NODE_ID + def_bool y + depends on NUMA + +config HAVE_SETUP_PER_CPU_AREA + def_bool y + depends on NUMA + +config NEED_PER_CPU_EMBED_FIRST_CHUNK + def_bool y + depends on NUMA + +config NEED_PER_CPU_PAGE_FIRST_CHUNK + def_bool y + depends on NUMA + config FORCE_MAX_ZONEORDER int "Maximum zone order" range 14 64 if PAGE_SIZE_64KB @@ -349,6 +382,7 @@ config ARCH_SELECT_MEMORY_MODEL config ARCH_FLATMEM_ENABLE def_bool y + depends on !NUMA config ARCH_SPARSEMEM_ENABLE def_bool y @@ -369,6 +403,10 @@ config ARCH_MEMORY_PROBE def_bool y depends on MEMORY_HOTPLUG +config HAVE_ARCH_NODEDATA_EXTENSION + def_bool y + depends on NUMA && ARCH_ENABLE_MEMORY_HOTPLUG + config MMU bool default y diff --git a/arch/loongarch/include/asm/bootinfo.h b/arch/loongarch/include/asm/bootinfo.h index 41838633d1aa..e358ea0e823c 100644 --- a/arch/loongarch/include/asm/bootinfo.h +++ b/arch/loongarch/include/asm/bootinfo.h @@ -15,6 +15,7 @@ extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_ad extern void early_init(void); extern void platform_init(void); +extern void plat_swiotlb_setup(void); extern void free_init_pages(const char *what, unsigned long begin, unsigned long end); diff --git a/arch/loongarch/include/asm/dma-direct.h b/arch/loongarch/include/asm/dma-direct.h new file mode 100644 index 000000000000..5fdc1988c34b --- /dev/null +++ b/arch/loongarch/include/asm/dma-direct.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited + */ +#ifndef _LOONGARCH_DMA_DIRECT_H +#define _LOONGARCH_DMA_DIRECT_H + +dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); +phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); + +#endif /* _LOONGARCH_DMA_DIRECT_H */ diff --git a/arch/loongarch/include/asm/mmzone.h b/arch/loongarch/include/asm/mmzone.h new file mode 100644 index 000000000000..772c3baa5bb9 --- /dev/null +++ b/arch/loongarch/include/asm/mmzone.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Author: Huacai Chen (chenhuacai@loongson.cn) + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited + */ +#ifndef _ASM_MMZONE_H_ +#define _ASM_MMZONE_H_ + +#include +#include + +extern struct pglist_data *node_data[]; + +#define NODE_DATA(nid) (node_data[(nid)]) + +extern void setup_zero_pages(void); + +#endif /* _ASM_MMZONE_H_ */ diff --git a/arch/loongarch/include/asm/numa.h b/arch/loongarch/include/asm/numa.h new file mode 100644 index 000000000000..79a7ed4bdaba --- /dev/null +++ b/arch/loongarch/include/asm/numa.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * LoongArch specific ACPICA environments and implementation + * + * Author: Jianmin Lv + * Huacai Chen + * + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited + */ + +#ifndef _ASM_LOONGARCH_NUMA_H +#define _ASM_LOONGARCH_NUMA_H + +#include + +#define NODE_ADDRSPACE_SHIFT 44 + +#define pa_to_nid(addr) (((addr) & 0xf00000000000) >> NODE_ADDRSPACE_SHIFT) +#define nid_to_addrbase(nid) (_ULCAST_(nid) << NODE_ADDRSPACE_SHIFT) + +#ifdef CONFIG_NUMA + +extern int numa_off; +extern s16 __cpuid_to_node[CONFIG_NR_CPUS]; +extern nodemask_t numa_nodes_parsed __initdata; + +struct numa_memblk { + u64 start; + u64 end; + int nid; +}; + +#define NR_NODE_MEMBLKS (MAX_NUMNODES*2) +struct numa_meminfo { + int nr_blks; + struct numa_memblk blk[NR_NODE_MEMBLKS]; +}; + +extern int __init numa_add_memblk(int nodeid, u64 start, u64 end); + +extern void __init early_numa_add_cpu(int cpuid, s16 node); +extern void numa_add_cpu(unsigned int cpu); +extern void numa_remove_cpu(unsigned int cpu); + +static inline void numa_clear_node(int cpu) +{ +} + +static inline void set_cpuid_to_node(int cpuid, s16 node) +{ + __cpuid_to_node[cpuid] = node; +} + +extern int early_cpu_to_node(int cpu); + +#else + +static inline void early_numa_add_cpu(int cpuid, s16 node) { } +static inline void numa_add_cpu(unsigned int cpu) { } +static inline void numa_remove_cpu(unsigned int cpu) { } + +static inline int early_cpu_to_node(int cpu) +{ + return 0; +} + +#endif /* CONFIG_NUMA */ + +#endif /* _ASM_LOONGARCH_NUMA_H */ diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 3e86538d79cb..5127327e49af 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -593,6 +593,18 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#ifdef CONFIG_NUMA_BALANCING +static inline long pte_protnone(pte_t pte) +{ + return (pte_val(pte) & _PAGE_PROTNONE); +} + +static inline long pmd_protnone(pmd_t pmd) +{ + return (pmd_val(pmd) & _PAGE_PROTNONE); +} +#endif /* CONFIG_NUMA_BALANCING */ + /* * We provide our own get_unmapped area to cope with the virtual aliasing * constraints placed on us by the cache architecture. diff --git a/arch/loongarch/include/asm/topology.h b/arch/loongarch/include/asm/topology.h index bc541a723f8a..f855de0f30b2 100644 --- a/arch/loongarch/include/asm/topology.h +++ b/arch/loongarch/include/asm/topology.h @@ -7,6 +7,27 @@ #include +#ifdef CONFIG_NUMA + +extern cpumask_t cpus_on_node[]; + +#define cpumask_of_node(node) (&cpus_on_node[node]) + +struct pci_bus; +extern int pcibus_to_node(struct pci_bus *); + +#define cpumask_of_pcibus(bus) (cpu_online_mask) + +extern unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; + +void numa_set_distance(int from, int to, int distance); + +#define node_distance(from, to) (__node_distances[(from)][(to)]) + +#else +#define pcibus_to_node(bus) 0 +#endif + #ifdef CONFIG_SMP #define topology_physical_package_id(cpu) (cpu_data[cpu].package) #define topology_core_id(cpu) (cpu_core(&cpu_data[cpu])) diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile index 9d5cb652bfc0..66f5cd49fb03 100644 --- a/arch/loongarch/kernel/Makefile +++ b/arch/loongarch/kernel/Makefile @@ -21,4 +21,6 @@ obj-$(CONFIG_PROC_FS) += proc.o obj-$(CONFIG_SMP) += smp.o +obj-$(CONFIG_NUMA) += numa.o + CPPFLAGS_vmlinux.lds := $(KBUILD_CFLAGS) diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 3cf517488fdb..8980bcf8e229 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -14,6 +14,7 @@ #include #include #include +#include #include int acpi_disabled; @@ -348,6 +349,80 @@ int __init acpi_boot_init(void) return 0; } +#ifdef CONFIG_ACPI_NUMA + +static __init int setup_node(int pxm) +{ + return acpi_map_pxm_to_node(pxm); +} + +/* + * Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for + * I/O localities since SRAT does not list them. I/O localities are + * not supported at this point. + */ +extern unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; +unsigned int numa_distance_cnt; + +static inline unsigned int get_numa_distances_cnt(struct acpi_table_slit *slit) +{ + return slit->locality_count; +} + +void __init numa_set_distance(int from, int to, int distance) +{ + if ((u8)distance != distance || (from == to && distance != LOCAL_DISTANCE)) { + pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n", + from, to, distance); + return; + } + + __node_distances[from][to] = distance; +} + +/* Callback for Proximity Domain -> CPUID mapping */ +void __init +acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) +{ + int pxm, node; + + if (srat_disabled()) + return; + if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) { + bad_srat(); + return; + } + if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) + return; + pxm = pa->proximity_domain_lo; + if (acpi_srat_revision >= 2) { + pxm |= (pa->proximity_domain_hi[0] << 8); + pxm |= (pa->proximity_domain_hi[1] << 16); + pxm |= (pa->proximity_domain_hi[2] << 24); + } + node = setup_node(pxm); + if (node < 0) { + pr_err("SRAT: Too many proximity domains %x\n", pxm); + bad_srat(); + return; + } + + if (pa->apic_id >= CONFIG_NR_CPUS) { + pr_info("SRAT: PXM %u -> CPU 0x%02x -> Node %u skipped apicid that is too big\n", + pxm, pa->apic_id, node); + return; + } + + early_numa_add_cpu(pa->apic_id, node); + + set_cpuid_to_node(pa->apic_id, node); + node_set(node, numa_nodes_parsed); + pr_info("SRAT: PXM %u -> CPU 0x%02x -> Node %u\n", pxm, pa->apic_id, node); +} + +void __init acpi_numa_arch_fixup(void) {} +#endif + void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) { memblock_mark_nomap(addr, size); @@ -357,6 +432,22 @@ void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) #include +static int __ref acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) +{ +#ifdef CONFIG_ACPI_NUMA + int nid; + + nid = acpi_get_node(handle); + if (nid != NUMA_NO_NODE) { + set_cpuid_to_node(physid, nid); + node_set(nid, numa_nodes_parsed); + set_cpu_numa_node(cpu, nid); + cpumask_set_cpu(cpu, cpumask_of_node(nid)); + } +#endif + return 0; +} + int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu) { int cpu; @@ -367,6 +458,8 @@ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu return cpu; } + acpi_map_cpu2node(handle, cpu, physid); + *pcpu = cpu; return 0; @@ -375,6 +468,9 @@ EXPORT_SYMBOL(acpi_map_cpu); int acpi_unmap_cpu(int cpu) { +#ifdef CONFIG_ACPI_NUMA + set_cpuid_to_node(cpu_logical_map(cpu), NUMA_NO_NODE); +#endif set_cpu_present(cpu, false); num_processors--; diff --git a/arch/loongarch/kernel/dma.c b/arch/loongarch/kernel/dma.c new file mode 100644 index 000000000000..d31ad0b2e5d4 --- /dev/null +++ b/arch/loongarch/kernel/dma.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited + */ +#include +#include +#include +#include +#include + +#include +#include +#include + +/* + * We extract 4bit node id (bit 44~47) from Loongson-3's + * 48bit physical address space and embed it into 40bit. + */ + +static int node_id_offset; + +dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + long nid = (paddr >> 44) & 0xf; + + return ((nid << 44) ^ paddr) | (nid << node_id_offset); +} + +phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) +{ + long nid = (daddr >> node_id_offset) & 0xf; + + return ((nid << node_id_offset) ^ daddr) | (nid << 44); +} + +void __init plat_swiotlb_setup(void) +{ + swiotlb_init(1); + node_id_offset = ((readl(LS7A_DMA_CFG) & LS7A_DMA_NODE_MASK) >> LS7A_DMA_NODE_SHF) + 36; +} diff --git a/arch/loongarch/kernel/module.c b/arch/loongarch/kernel/module.c index af7c403b032b..cb87486cacb6 100644 --- a/arch/loongarch/kernel/module.c +++ b/arch/loongarch/kernel/module.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c new file mode 100644 index 000000000000..6566d7793f81 --- /dev/null +++ b/arch/loongarch/kernel/numa.c @@ -0,0 +1,482 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Author: Xiang Gao + * Huacai Chen + * + * Copyright (C) 2020-2021 Loongson Technology Corporation Limited + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +int numa_off; +struct pglist_data *node_data[MAX_NUMNODES]; +unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES]; + +EXPORT_SYMBOL(node_data); +EXPORT_SYMBOL(__node_distances); + +static struct numa_meminfo numa_meminfo; +cpumask_t cpus_on_node[MAX_NUMNODES]; +cpumask_t phys_cpus_on_node[MAX_NUMNODES]; +EXPORT_SYMBOL(cpus_on_node); + +/* + * apicid, cpu, node mappings + */ +s16 __cpuid_to_node[CONFIG_NR_CPUS] = { + [0 ... CONFIG_NR_CPUS - 1] = NUMA_NO_NODE +}; +EXPORT_SYMBOL(__cpuid_to_node); + +nodemask_t numa_nodes_parsed __initdata; + +#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA +unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; +EXPORT_SYMBOL(__per_cpu_offset); + +static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) +{ + if (early_cpu_to_node(from) == early_cpu_to_node(to)) + return LOCAL_DISTANCE; + else + return REMOTE_DISTANCE; +} + +static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, + size_t align) +{ + return memblock_alloc_try_nid(size, align, __pa(MAX_DMA_ADDRESS), + MEMBLOCK_ALLOC_ACCESSIBLE, early_cpu_to_node(cpu)); +} + +static void __init pcpu_fc_free(void *ptr, size_t size) +{ + memblock_free_early(__pa(ptr), size); +} + +static void __init pcpu_populate_pte(unsigned long addr) +{ + pgd_t *pgd = pgd_offset_k(addr); + p4d_t *p4d = p4d_offset(pgd, addr); + pud_t *pud; + pmd_t *pmd; + + if (pgd_none(*pgd)) { + pud_t *new; + + new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); + pgd_populate(&init_mm, pgd, new); +#ifndef __PAGETABLE_PUD_FOLDED + pud_init((unsigned long)new, (unsigned long)invalid_pmd_table); +#endif + } + + pud = pud_offset(p4d, addr); + if (pud_none(*pud)) { + pmd_t *new; + + new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); + pud_populate(&init_mm, pud, new); +#ifndef __PAGETABLE_PMD_FOLDED + pmd_init((unsigned long)new, (unsigned long)invalid_pte_table); +#endif + } + + pmd = pmd_offset(pud, addr); + if (!pmd_present(*pmd)) { + pte_t *new; + + new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); + pmd_populate_kernel(&init_mm, pmd, new); + } +} + +void __init setup_per_cpu_areas(void) +{ + unsigned long delta; + unsigned int cpu; + int rc = -EINVAL; + + if (pcpu_chosen_fc == PCPU_FC_AUTO) { + if (nr_node_ids >= 8) + pcpu_chosen_fc = PCPU_FC_PAGE; + else + pcpu_chosen_fc = PCPU_FC_EMBED; + } + + /* + * Always reserve area for module percpu variables. That's + * what the legacy allocator did. + */ + if (pcpu_chosen_fc != PCPU_FC_PAGE) { + rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, + PERCPU_DYNAMIC_RESERVE, PMD_SIZE, + pcpu_cpu_distance, + pcpu_fc_alloc, pcpu_fc_free); + if (rc < 0) + pr_warn("%s allocator failed (%d), falling back to page size\n", + pcpu_fc_names[pcpu_chosen_fc], rc); + } + if (rc < 0) + rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, + pcpu_fc_alloc, pcpu_fc_free, + pcpu_populate_pte); + if (rc < 0) + panic("cannot initialize percpu area (err=%d)", rc); + + delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; + for_each_possible_cpu(cpu) + __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; +} +#endif + +/* + * Get nodeid by logical cpu number. + * __cpuid_to_node maps phyical cpu id to node, so we + * should use cpu_logical_map(cpu) to index it. + * + * This routine is only used in early phase during + * booting, after setup_per_cpu_areas calling and numa_node + * initialization, cpu_to_node will be used instead. + */ +int early_cpu_to_node(int cpu) +{ + int physid = cpu_logical_map(cpu); + + if (physid < 0) + return NUMA_NO_NODE; + + return __cpuid_to_node[physid]; +} + +void __init early_numa_add_cpu(int cpuid, s16 node) +{ + int cpu = __cpu_number_map[cpuid]; + + if (cpu < 0) + return; + + cpumask_set_cpu(cpu, &cpus_on_node[node]); + cpumask_set_cpu(cpuid, &phys_cpus_on_node[node]); +} + +void numa_add_cpu(unsigned int cpu) +{ + int nid = cpu_to_node(cpu); + cpumask_set_cpu(cpu, &cpus_on_node[nid]); +} + +void numa_remove_cpu(unsigned int cpu) +{ + int nid = cpu_to_node(cpu); + cpumask_clear_cpu(cpu, &cpus_on_node[nid]); +} + +static int __init numa_add_memblk_to(int nid, u64 start, u64 end, + struct numa_meminfo *mi) +{ + /* ignore zero length blks */ + if (start == end) + return 0; + + /* whine about and ignore invalid blks */ + if (start > end || nid < 0 || nid >= MAX_NUMNODES) { + pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", + nid, start, end - 1); + return 0; + } + + if (mi->nr_blks >= NR_NODE_MEMBLKS) { + pr_err("NUMA: too many memblk ranges\n"); + return -EINVAL; + } + + mi->blk[mi->nr_blks].start = PFN_ALIGN(start); + mi->blk[mi->nr_blks].end = PFN_ALIGN(end - PAGE_SIZE + 1); + mi->blk[mi->nr_blks].nid = nid; + mi->nr_blks++; + return 0; +} + +/** + * numa_add_memblk - Add one numa_memblk to numa_meminfo + * @nid: NUMA node ID of the new memblk + * @start: Start address of the new memblk + * @end: End address of the new memblk + * + * Add a new memblk to the default numa_meminfo. + * + * RETURNS: + * 0 on success, -errno on failure. + */ +int __init numa_add_memblk(int nid, u64 start, u64 end) +{ + return numa_add_memblk_to(nid, start, end, &numa_meminfo); +} + +static void __init alloc_node_data(int nid) +{ + void *nd; + unsigned long nd_pa; + size_t nd_sz = roundup(sizeof(pg_data_t), PAGE_SIZE); + + nd_pa = memblock_phys_alloc_try_nid(nd_sz, SMP_CACHE_BYTES, nid); + if (!nd_pa) { + pr_err("Cannot find %zu Byte for node_data (initial node: %d)\n", nd_sz, nid); + return; + } + + nd = __va(nd_pa); + + node_data[nid] = nd; + memset(nd, 0, sizeof(pg_data_t)); +} + +static void __init node_mem_init(unsigned int node) +{ + unsigned long start_pfn, end_pfn; + unsigned long node_addrspace_offset; + + node_addrspace_offset = nid_to_addrbase(node); + pr_info("Node%d's addrspace_offset is 0x%lx\n", + node, node_addrspace_offset); + + get_pfn_range_for_nid(node, &start_pfn, &end_pfn); + pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n", + node, start_pfn, end_pfn); + + alloc_node_data(node); + + NODE_DATA(node)->node_start_pfn = start_pfn; + NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; + + if (node == 0) { + /* used by finalize_initrd() */ + max_low_pfn = end_pfn; + + /* Reserve the first 2MB */ + memblock_reserve(PHYS_OFFSET, 0x200000); + + /* Reserve the kernel text/data/bss */ + memblock_reserve(__pa_symbol(&_text), + __pa_symbol(&_end) - __pa_symbol(&_text)); + } +} + +#ifdef CONFIG_ACPI_NUMA + +/* + * Sanity check to catch more bad NUMA configurations (they are amazingly + * common). Make sure the nodes cover all memory. + */ +static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi) +{ + int i; + u64 numaram, biosram; + + numaram = 0; + for (i = 0; i < mi->nr_blks; i++) { + u64 s = mi->blk[i].start >> PAGE_SHIFT; + u64 e = mi->blk[i].end >> PAGE_SHIFT; + + numaram += e - s; + numaram -= __absent_pages_in_range(mi->blk[i].nid, s, e); + if ((s64)numaram < 0) + numaram = 0; + } + max_pfn = max_low_pfn; + biosram = max_pfn - absent_pages_in_range(0, max_pfn); + + BUG_ON((s64)(biosram - numaram) >= (1 << (20 - PAGE_SHIFT))); + return true; +} + +static void __init add_node_intersection(u32 node, u64 start, u64 size) +{ + static unsigned long num_physpages; + + num_physpages += (size >> PAGE_SHIFT); + pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", + node, ADDRESS_TYPE_SYSRAM, start, size); + pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", + start >> PAGE_SHIFT, (start + size) >> PAGE_SHIFT, num_physpages); + memblock_set_node(start, size, &memblock.memory, node); +} + +/* + * add_mem_region + * + * Add a uasable memory region described by BIOS. The + * routine gets each intersection between BIOS's region + * and node's region, and adds them into node's memblock + * pool. + * + */ +static void __init add_numamem_region(u64 start, u64 end) +{ + u32 i; + u64 ofs = start; + + if (start >= end) { + pr_debug("Invalid region: %016llx-%016llx\n", start, end); + return; + } + + for (i = 0; i < numa_meminfo.nr_blks; i++) { + struct numa_memblk *mb = &numa_meminfo.blk[i]; + + if (ofs > mb->end) + continue; + + if (end > mb->end) { + add_node_intersection(mb->nid, ofs, mb->end - ofs); + ofs = mb->end; + } else { + add_node_intersection(mb->nid, ofs, end - ofs); + break; + } + } +} + +static void __init init_node_memblock(void) +{ + u32 i, mem_type; + u64 mem_end, mem_start, mem_size; + + /* Parse memory information and activate */ + for (i = 0; i < loongson_mem_map->map_count; i++) { + mem_type = loongson_mem_map->map[i].mem_type; + mem_start = loongson_mem_map->map[i].mem_start; + mem_size = loongson_mem_map->map[i].mem_size; + mem_end = loongson_mem_map->map[i].mem_start + mem_size; + switch (mem_type) { + case ADDRESS_TYPE_SYSRAM: + mem_start = PFN_ALIGN(mem_start); + mem_end = PFN_ALIGN(mem_end - PAGE_SIZE + 1); + add_numamem_region(mem_start, mem_end); + break; + case ADDRESS_TYPE_ACPI: + case ADDRESS_TYPE_RESERVED: + pr_info("Resvd: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", + mem_type, mem_start, mem_size); + memblock_reserve(mem_start, mem_size); + break; + } + } +} + +static void __init numa_default_distance(void) +{ + int row, col; + + for (row = 0; row < MAX_NUMNODES; row++) + for (col = 0; col < MAX_NUMNODES; col++) { + + if (col == row) + __node_distances[row][col] = 0; + else + /* We assume that one node per package here! + * + * A SLIT should be used for multiple nodes per + * package to override default setting. + */ + __node_distances[row][col] = 200; + } +} + +static int __init numa_mem_init(int (*init_func)(void)) +{ + int i; + int ret; + int node; + + for (i = 0; i < NR_CPUS; i++) + set_cpuid_to_node(i, NUMA_NO_NODE); + + nodes_clear(numa_nodes_parsed); + nodes_clear(node_possible_map); + nodes_clear(node_online_map); + memset(&numa_meminfo, 0, sizeof(numa_meminfo)); + numa_default_distance(); + + /* Parse SRAT and SLIT if provided by firmware. */ + ret = init_func(); + if (ret < 0) + return ret; + + node_possible_map = numa_nodes_parsed; + if (WARN_ON(nodes_empty(node_possible_map))) + return -EINVAL; + + init_node_memblock(); + if (numa_meminfo_cover_memory(&numa_meminfo) == false) + return -EINVAL; + + for_each_node_mask(node, node_possible_map) { + node_mem_init(node); + node_set_online(node); + } + max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); + + return 0; +} +#endif +void __init paging_init(void) +{ + unsigned int node; + unsigned long zones_size[MAX_NR_ZONES] = {0, }; + + for_each_online_node(node) { + unsigned long start_pfn, end_pfn; + + get_pfn_range_for_nid(node, &start_pfn, &end_pfn); + + if (end_pfn > max_low_pfn) + max_low_pfn = end_pfn; + } +#ifdef CONFIG_ZONE_DMA32 + zones_size[ZONE_DMA32] = MAX_DMA32_PFN; +#endif + zones_size[ZONE_NORMAL] = max_low_pfn; + free_area_init(zones_size); +} + +void __init mem_init(void) +{ + high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); + memblock_free_all(); + setup_zero_pages(); /* This comes from node 0 */ +} + +int pcibus_to_node(struct pci_bus *bus) +{ + return dev_to_node(&bus->dev); +} +EXPORT_SYMBOL(pcibus_to_node); + +void __init fw_init_numa_memory(void) +{ + numa_mem_init(acpi_numa_init); + setup_nr_node_ids(); + loongson_sysconf.nr_nodes = nr_node_ids; + loongson_sysconf.cores_per_node = cpumask_weight(&phys_cpus_on_node[0]); +} +EXPORT_SYMBOL(fw_init_numa_memory); diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c index 3ad6dc1dc565..4c484b927644 100644 --- a/arch/loongarch/kernel/setup.c +++ b/arch/loongarch/kernel/setup.c @@ -343,7 +343,9 @@ static void __init arch_mem_init(char **cmdline_p) check_kernel_sections_mem(); +#ifndef CONFIG_NUMA memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0); +#endif pagetable_init(); /* @@ -365,7 +367,7 @@ static void __init arch_mem_init(char **cmdline_p) sparse_init(); memblock_set_bottom_up(true); - swiotlb_init(1); + plat_swiotlb_setup(); dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); @@ -429,7 +431,11 @@ void __init platform_init(void) acpi_boot_init(); #endif +#ifndef CONFIG_NUMA fw_init_memory(); +#else + fw_init_numa_memory(); +#endif dmi_setup(); smbios_parse(); pr_info("The BIOS Version: %s\n", b_info.bios_version); diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c index 3ecdf7e9ba7c..7b9ae8b75690 100644 --- a/arch/loongarch/kernel/smp.c +++ b/arch/loongarch/kernel/smp.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -231,6 +232,9 @@ void loongson3_init_secondary(void) iocsr_writel(0xffffffff, LOONGARCH_IOCSR_IPI_EN); +#ifdef CONFIG_NUMA + numa_add_cpu(cpu); +#endif per_cpu(cpu_state, cpu) = CPU_ONLINE; cpu_set_core(&cpu_data[cpu], cpu_logical_map(cpu) % loongson_sysconf.cores_per_package); @@ -274,6 +278,9 @@ int loongson3_cpu_disable(void) if (io_master(cpu)) return -EBUSY; +#ifdef CONFIG_NUMA + numa_remove_cpu(cpu); +#endif set_cpu_online(cpu, false); calculate_cpu_foreign_map(); local_irq_save(flags); @@ -500,14 +507,36 @@ void calculate_cpu_foreign_map(void) /* Preload SMP state for boot cpu */ void smp_prepare_boot_cpu(void) { - unsigned int cpu; + unsigned int cpu, node, rr_node; set_cpu_possible(0, true); set_cpu_online(0, true); set_my_cpu_offset(per_cpu_offset(0)); - for_each_possible_cpu(cpu) - set_cpu_numa_node(cpu, 0); + rr_node = first_node(node_online_map); + for_each_possible_cpu(cpu) { + node = early_cpu_to_node(cpu); + + /* + * The mapping between present cpus and nodes has been + * built during MADT and SRAT parsing. + * + * If possible cpus = present cpus here, early_cpu_to_node + * will return valid node. + * + * If possible cpus > present cpus here (e.g. some possible + * cpus will be added by cpu-hotplug later), for possible but + * not present cpus, early_cpu_to_node will return NUMA_NO_NODE, + * and we just map them to online nodes in round-robin way. + * Once hotplugged, new correct mapping will be built for them. + */ + if (node != NUMA_NO_NODE) + set_cpu_numa_node(cpu, node); + else { + set_cpu_numa_node(cpu, rr_node); + rr_node = next_node_in(rr_node, node_online_map); + } + } } /* called from main before smp_init() */ diff --git a/arch/loongarch/kernel/topology.c b/arch/loongarch/kernel/topology.c index ab1a75c0b5a6..ae5f0e5414a3 100644 --- a/arch/loongarch/kernel/topology.c +++ b/arch/loongarch/kernel/topology.c @@ -37,6 +37,11 @@ static int __init topology_init(void) { int i, ret; +#ifdef CONFIG_NUMA + for_each_online_node(i) + register_one_node(i); +#endif /* CONFIG_NUMA */ + for_each_present_cpu(i) { struct cpu *c = &per_cpu(cpu_devices, i); diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c index 1e7ce2a2b427..35cffa97e273 100644 --- a/arch/loongarch/mm/init.c +++ b/arch/loongarch/mm/init.c @@ -93,6 +93,7 @@ void copy_from_user_page(struct vm_area_struct *vma, } EXPORT_SYMBOL_GPL(copy_from_user_page); +#ifndef CONFIG_NUMA void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; @@ -116,6 +117,7 @@ void __init mem_init(void) memblock_free_all(); setup_zero_pages(); /* Setup zeroed pages. */ } +#endif /* !CONFIG_NUMA */ void free_init_pages(const char *what, unsigned long begin, unsigned long end) { @@ -160,6 +162,34 @@ int arch_add_memory(int nid, u64 start, u64 size, struct mhp_params *params) return ret; } +#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION +pg_data_t *arch_alloc_nodedata(int nid) +{ + return kzalloc(sizeof(pg_data_t), GFP_KERNEL); +} + +void arch_free_nodedata(pg_data_t *pgdat) +{ + kfree(pgdat); +} + +void arch_refresh_nodedata(int nid, pg_data_t *pgdat) +{ + BUG(); +} +#endif + +#ifdef CONFIG_NUMA +int memory_add_physaddr_to_nid(u64 start) +{ + int nid; + + nid = pa_to_nid(start); + return nid; +} +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); +#endif + #ifdef CONFIG_MEMORY_HOTREMOVE void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap) { diff --git a/arch/loongarch/pci/acpi.c b/arch/loongarch/pci/acpi.c index cf6574712fc8..ec873d8c477e 100644 --- a/arch/loongarch/pci/acpi.c +++ b/arch/loongarch/pci/acpi.c @@ -11,6 +11,7 @@ #include #include +#include #include struct pci_root_info { @@ -27,8 +28,10 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) { struct pci_config_window *cfg = bridge->bus->sysdata; struct acpi_device *adev = to_acpi_device(cfg->parent); + struct device *bus_dev = &bridge->bus->dev; ACPI_COMPANION_SET(&bridge->dev, adev); + set_dev_node(bus_dev, pa_to_nid(cfg->res.start)); return 0; } diff --git a/arch/loongarch/pci/pci.c b/arch/loongarch/pci/pci.c index f2c33feea57d..23261029b7d4 100644 --- a/arch/loongarch/pci/pci.c +++ b/arch/loongarch/pci/pci.c @@ -10,6 +10,7 @@ #include #include #include +#include #define PCI_DEVICE_ID_LOONGSON_HOST 0x7a00 #define PCI_DEVICE_ID_LOONGSON_DC 0x7a06 @@ -82,6 +83,7 @@ int pcibios_alloc_irq(struct pci_dev *dev) static void pci_fixup_resbase(struct pci_dev *dev) { + int node = pcibus_to_node(dev->bus); struct resource *res; struct resource_entry *entry, *window, *tmp; struct pci_host_bridge *bridge = to_pci_host_bridge(dev->bus->bridge); @@ -97,9 +99,9 @@ static void pci_fixup_resbase(struct pci_dev *dev) resource_list_for_each_entry(window, &bridge->windows) { if (window->res->flags & IORESOURCE_MEM) { - window->offset = HT1LO_OFFSET; - window->res->start |= HT1LO_OFFSET; - window->res->end |= HT1LO_OFFSET; + window->offset = nid_to_addrbase(node) | HT1LO_OFFSET; + window->res->start |= nid_to_addrbase(node) | HT1LO_OFFSET; + window->res->end |= nid_to_addrbase(node) | HT1LO_OFFSET; } } } -- 2.27.0