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Message-ID: <51108E25.6070300@jp.fujitsu.com>
Date: Tue, 5 Feb 2013 13:44:21 +0900
From: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To: liguang <lig.fnst@...fujitsu.com>
CC: <linux-kernel@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
<x86@...nel.org>, <rientjes@...gle.com>
Subject: Re: [PATCH v2 1/4] acpi: move x86/mm/srat.c to x86/kernel/acpi/srat.c
Hi Liguang,
2013/02/05 11:37, liguang wrote:
> srat table should present only on acpi domain,
> seems mm/ is not the right place for it.
>
> Reviewed-by: David Rientjes <rientjes@...gle.com>
> Signed-off-by: liguang <lig.fnst@...fujitsu.com>
> ---
>
> arch/x86/kernel/acpi/srat.c | 197 +++++++++++++++++++++++++++++++++++++++++++
> arch/x86/mm/srat.c | 197 -------------------------------------------
> 2 files changed, 197 insertions(+), 197 deletions(-)
> create mode 100644 arch/x86/kernel/acpi/srat.c
> delete mode 100644 arch/x86/mm/srat.c
Changes of Makefile disappeared.
Thanks,
Yasuaki Ishimatsu
>
> diff --git a/arch/x86/kernel/acpi/srat.c b/arch/x86/kernel/acpi/srat.c
> new file mode 100644
> index 0000000..4ddf497
> --- /dev/null
> +++ b/arch/x86/kernel/acpi/srat.c
> @@ -0,0 +1,197 @@
> +/*
> + * ACPI 3.0 based NUMA setup
> + * Copyright 2004 Andi Kleen, SuSE Labs.
> + *
> + * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
> + *
> + * Called from acpi_numa_init while reading the SRAT and SLIT tables.
> + * Assumes all memory regions belonging to a single proximity domain
> + * are in one chunk. Holes between them will be included in the node.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/acpi.h>
> +#include <linux/mmzone.h>
> +#include <linux/bitmap.h>
> +#include <linux/module.h>
> +#include <linux/topology.h>
> +#include <linux/bootmem.h>
> +#include <linux/memblock.h>
> +#include <linux/mm.h>
> +#include <asm/proto.h>
> +#include <asm/numa.h>
> +#include <asm/e820.h>
> +#include <asm/apic.h>
> +#include <asm/uv/uv.h>
> +
> +int acpi_numa __initdata;
> +
> +static __init int setup_node(int pxm)
> +{
> + return acpi_map_pxm_to_node(pxm);
> +}
> +
> +static __init void bad_srat(void)
> +{
> + printk(KERN_ERR "SRAT: SRAT not used.\n");
> + acpi_numa = -1;
> +}
> +
> +static __init inline int srat_disabled(void)
> +{
> + return acpi_numa < 0;
> +}
> +
> +/* Callback for SLIT parsing */
> +void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
> +{
> + int i, j;
> +
> + for (i = 0; i < slit->locality_count; i++)
> + for (j = 0; j < slit->locality_count; j++)
> + numa_set_distance(pxm_to_node(i), pxm_to_node(j),
> + slit->entry[slit->locality_count * i + j]);
> +}
> +
> +/* Callback for Proximity Domain -> x2APIC mapping */
> +void __init
> +acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
> +{
> + int pxm, node;
> + int apic_id;
> +
> + if (srat_disabled())
> + return;
> + if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
> + bad_srat();
> + return;
> + }
> + if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
> + return;
> + pxm = pa->proximity_domain;
> + apic_id = pa->apic_id;
> + if (!apic->apic_id_valid(apic_id)) {
> + printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
> + pxm, apic_id);
> + return;
> + }
> + node = setup_node(pxm);
> + if (node < 0) {
> + printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
> + bad_srat();
> + return;
> + }
> +
> + if (apic_id >= MAX_LOCAL_APIC) {
> + printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
> + return;
> + }
> + set_apicid_to_node(apic_id, node);
> + node_set(node, numa_nodes_parsed);
> + acpi_numa = 1;
> + printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
> + pxm, apic_id, node);
> +}
> +
> +/* Callback for Proximity Domain -> LAPIC mapping */
> +void __init
> +acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
> +{
> + int pxm, node;
> + int apic_id;
> +
> + 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 |= *((unsigned int*)pa->proximity_domain_hi) << 8;
> + node = setup_node(pxm);
> + if (node < 0) {
> + printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
> + bad_srat();
> + return;
> + }
> +
> + if (get_uv_system_type() >= UV_X2APIC)
> + apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
> + else
> + apic_id = pa->apic_id;
> +
> + if (apic_id >= MAX_LOCAL_APIC) {
> + printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
> + return;
> + }
> +
> + set_apicid_to_node(apic_id, node);
> + node_set(node, numa_nodes_parsed);
> + acpi_numa = 1;
> + printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
> + pxm, apic_id, node);
> +}
> +
> +#ifdef CONFIG_MEMORY_HOTPLUG
> +static inline int save_add_info(void) {return 1;}
> +#else
> +static inline int save_add_info(void) {return 0;}
> +#endif
> +
> +/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
> +int __init
> +acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
> +{
> + u64 start, end;
> + int node, pxm;
> +
> + if (srat_disabled())
> + return -1;
> + if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {
> + bad_srat();
> + return -1;
> + }
> + if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
> + return -1;
> +
> + if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())
> + return -1;
> + start = ma->base_address;
> + end = start + ma->length;
> + pxm = ma->proximity_domain;
> + if (acpi_srat_revision <= 1)
> + pxm &= 0xff;
> + node = setup_node(pxm);
> + if (node < 0) {
> + printk(KERN_ERR "SRAT: Too many proximity domains.\n");
> + bad_srat();
> + return -1;
> + }
> +
> + if (numa_add_memblk(node, start, end) < 0) {
> + bad_srat();
> + return -1;
> + }
> +
> + node_set(node, numa_nodes_parsed);
> +
> + printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]\n",
> + node, pxm,
> + (unsigned long long) start, (unsigned long long) end - 1);
> + return 0;
> +}
> +
> +void __init acpi_numa_arch_fixup(void) {}
> +
> +int __init x86_acpi_numa_init(void)
> +{
> + int ret;
> +
> + ret = acpi_numa_init();
> + if (ret < 0)
> + return ret;
> + return srat_disabled() ? -EINVAL : 0;
> +}
> diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
> deleted file mode 100644
> index 4ddf497..0000000
> --- a/arch/x86/mm/srat.c
> +++ /dev/null
> @@ -1,197 +0,0 @@
> -/*
> - * ACPI 3.0 based NUMA setup
> - * Copyright 2004 Andi Kleen, SuSE Labs.
> - *
> - * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
> - *
> - * Called from acpi_numa_init while reading the SRAT and SLIT tables.
> - * Assumes all memory regions belonging to a single proximity domain
> - * are in one chunk. Holes between them will be included in the node.
> - */
> -
> -#include <linux/kernel.h>
> -#include <linux/acpi.h>
> -#include <linux/mmzone.h>
> -#include <linux/bitmap.h>
> -#include <linux/module.h>
> -#include <linux/topology.h>
> -#include <linux/bootmem.h>
> -#include <linux/memblock.h>
> -#include <linux/mm.h>
> -#include <asm/proto.h>
> -#include <asm/numa.h>
> -#include <asm/e820.h>
> -#include <asm/apic.h>
> -#include <asm/uv/uv.h>
> -
> -int acpi_numa __initdata;
> -
> -static __init int setup_node(int pxm)
> -{
> - return acpi_map_pxm_to_node(pxm);
> -}
> -
> -static __init void bad_srat(void)
> -{
> - printk(KERN_ERR "SRAT: SRAT not used.\n");
> - acpi_numa = -1;
> -}
> -
> -static __init inline int srat_disabled(void)
> -{
> - return acpi_numa < 0;
> -}
> -
> -/* Callback for SLIT parsing */
> -void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
> -{
> - int i, j;
> -
> - for (i = 0; i < slit->locality_count; i++)
> - for (j = 0; j < slit->locality_count; j++)
> - numa_set_distance(pxm_to_node(i), pxm_to_node(j),
> - slit->entry[slit->locality_count * i + j]);
> -}
> -
> -/* Callback for Proximity Domain -> x2APIC mapping */
> -void __init
> -acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
> -{
> - int pxm, node;
> - int apic_id;
> -
> - if (srat_disabled())
> - return;
> - if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
> - bad_srat();
> - return;
> - }
> - if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
> - return;
> - pxm = pa->proximity_domain;
> - apic_id = pa->apic_id;
> - if (!apic->apic_id_valid(apic_id)) {
> - printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
> - pxm, apic_id);
> - return;
> - }
> - node = setup_node(pxm);
> - if (node < 0) {
> - printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
> - bad_srat();
> - return;
> - }
> -
> - if (apic_id >= MAX_LOCAL_APIC) {
> - printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
> - return;
> - }
> - set_apicid_to_node(apic_id, node);
> - node_set(node, numa_nodes_parsed);
> - acpi_numa = 1;
> - printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
> - pxm, apic_id, node);
> -}
> -
> -/* Callback for Proximity Domain -> LAPIC mapping */
> -void __init
> -acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
> -{
> - int pxm, node;
> - int apic_id;
> -
> - 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 |= *((unsigned int*)pa->proximity_domain_hi) << 8;
> - node = setup_node(pxm);
> - if (node < 0) {
> - printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
> - bad_srat();
> - return;
> - }
> -
> - if (get_uv_system_type() >= UV_X2APIC)
> - apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
> - else
> - apic_id = pa->apic_id;
> -
> - if (apic_id >= MAX_LOCAL_APIC) {
> - printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
> - return;
> - }
> -
> - set_apicid_to_node(apic_id, node);
> - node_set(node, numa_nodes_parsed);
> - acpi_numa = 1;
> - printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
> - pxm, apic_id, node);
> -}
> -
> -#ifdef CONFIG_MEMORY_HOTPLUG
> -static inline int save_add_info(void) {return 1;}
> -#else
> -static inline int save_add_info(void) {return 0;}
> -#endif
> -
> -/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
> -int __init
> -acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
> -{
> - u64 start, end;
> - int node, pxm;
> -
> - if (srat_disabled())
> - return -1;
> - if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {
> - bad_srat();
> - return -1;
> - }
> - if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
> - return -1;
> -
> - if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())
> - return -1;
> - start = ma->base_address;
> - end = start + ma->length;
> - pxm = ma->proximity_domain;
> - if (acpi_srat_revision <= 1)
> - pxm &= 0xff;
> - node = setup_node(pxm);
> - if (node < 0) {
> - printk(KERN_ERR "SRAT: Too many proximity domains.\n");
> - bad_srat();
> - return -1;
> - }
> -
> - if (numa_add_memblk(node, start, end) < 0) {
> - bad_srat();
> - return -1;
> - }
> -
> - node_set(node, numa_nodes_parsed);
> -
> - printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]\n",
> - node, pxm,
> - (unsigned long long) start, (unsigned long long) end - 1);
> - return 0;
> -}
> -
> -void __init acpi_numa_arch_fixup(void) {}
> -
> -int __init x86_acpi_numa_init(void)
> -{
> - int ret;
> -
> - ret = acpi_numa_init();
> - if (ret < 0)
> - return ret;
> - return srat_disabled() ? -EINVAL : 0;
> -}
>
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