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Date: Tue, 05 Feb 2013 12:49:10 +0800
From: li guang <lig.fnst@...fujitsu.com>
To: Yasuaki Ishimatsu <isimatu.yasuaki@...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
在 2013-02-05二的 13:44 +0900，Yasuaki Ishimatsu写道：
> 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
Oh, fogot it,
Thank you so much for reminding me!
>
> >
> > 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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