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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC PATCH v2 10/25] x86: NUMA: Move numa code and make it generic
From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx>
Move code from xen/arch/x86/numa.c to xen/common/numa.c
so that it can be used by other archs.
Few generic static functions in x86/numa.c is made
non-static common/numa.c
The generic contents of header file asm-x86/numa.h
are moved to xen/numa.h.
Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx>
---
xen/arch/x86/numa.c | 456 ------------------------------------------
xen/arch/x86/srat.c | 7 +
xen/common/Makefile | 1 +
xen/common/numa.c | 488 +++++++++++++++++++++++++++++++++++++++++++++
xen/include/asm-x86/numa.h | 15 --
xen/include/xen/numa.h | 18 ++
6 files changed, 514 insertions(+), 471 deletions(-)
diff --git a/xen/arch/x86/numa.c b/xen/arch/x86/numa.c
index 3bdab9a..33c6806 100644
--- a/xen/arch/x86/numa.c
+++ b/xen/arch/x86/numa.c
@@ -10,286 +10,13 @@
#include <xen/ctype.h>
#include <xen/nodemask.h>
#include <xen/numa.h>
-#include <xen/keyhandler.h>
#include <xen/time.h>
#include <xen/smp.h>
#include <xen/pfn.h>
#include <asm/acpi.h>
-#include <xen/sched.h>
-#include <xen/softirq.h>
-
-static int numa_setup(char *s);
-custom_param("numa", numa_setup);
-
-struct node_data node_data[MAX_NUMNODES];
-
-/* Mapping from pdx to node id */
-unsigned int memnode_shift;
-static typeof(*memnodemap) _memnodemap[64];
-unsigned long memnodemapsize;
-uint8_t *memnodemap;
-
-nodeid_t __read_mostly cpu_to_node[NR_CPUS] = {
- [0 ... NR_CPUS-1] = NUMA_NO_NODE
-};
-/*
- * Keep BIOS's CPU2node information, should not be used for memory allocaion
- */
-nodeid_t apicid_to_node[MAX_LOCAL_APIC] = {
- [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
-};
-cpumask_t __read_mostly node_to_cpumask[MAX_NUMNODES];
nodemask_t __read_mostly node_online_map = { { [0] = 1UL } };
-static bool numa_off = 0;
-static bool acpi_numa = 1;
-
-bool is_numa_off(void)
-{
- return numa_off;
-}
-
-bool get_acpi_numa(void)
-{
- return acpi_numa;
-}
-
-void set_acpi_numa(bool_t val)
-{
- acpi_numa = val;
-}
-
-bool srat_disabled(void)
-{
- return numa_off || acpi_numa == 0;
-}
-
-/*
- * Given a shift value, try to populate memnodemap[]
- * Returns :
- * 0 if OK
- * -EINVAL if memnodmap[] too small (of shift too small)
- * OR if node overlap or lost ram (shift too big)
- */
-static int __init populate_memnodemap(const struct node *nodes, int numnodes,
- unsigned int shift, nodeid_t *nodeids)
-{
- unsigned long spdx, epdx;
- int i, res = -EINVAL;
-
- memset(memnodemap, NUMA_NO_NODE, memnodemapsize * sizeof(*memnodemap));
- for ( i = 0; i < numnodes; i++ )
- {
- spdx = paddr_to_pdx(nodes[i].start);
- epdx = paddr_to_pdx(nodes[i].end - 1) + 1;
- if ( spdx >= epdx )
- continue;
- if ( (epdx >> shift) >= memnodemapsize )
- return 0;
- do {
- if ( memnodemap[spdx >> shift] != NUMA_NO_NODE )
- return -EINVAL;
-
- if ( !nodeids )
- memnodemap[spdx >> shift] = i;
- else
- memnodemap[spdx >> shift] = nodeids[i];
-
- spdx += (1UL << shift);
- } while ( spdx < epdx );
- res = 0;
- }
-
- return res;
-}
-
-static int __init allocate_cachealigned_memnodemap(void)
-{
- unsigned long size = PFN_UP(memnodemapsize * sizeof(*memnodemap));
- unsigned long mfn = alloc_boot_pages(size, 1);
-
- if ( !mfn )
- {
- printk(KERN_ERR
- "NUMA: Unable to allocate Memory to Node hash map\n");
- memnodemapsize = 0;
- return -ENOMEM;
- }
-
- memnodemap = mfn_to_virt(mfn);
- mfn <<= PAGE_SHIFT;
- size <<= PAGE_SHIFT;
- printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n",
- mfn, mfn + size);
- memnodemapsize = size / sizeof(*memnodemap);
-
- return 0;
-}
-
-/*
- * The LSB of all start and end addresses in the node map is the value of the
- * maximum possible shift.
- */
-static unsigned int __init extract_lsb_from_nodes(const struct node *nodes,
- int numnodes)
-{
- unsigned int i, nodes_used = 0;
- unsigned long spdx, epdx;
- unsigned long bitfield = 0, memtop = 0;
-
- for ( i = 0; i < numnodes; i++ )
- {
- spdx = paddr_to_pdx(nodes[i].start);
- epdx = paddr_to_pdx(nodes[i].end - 1) + 1;
- if ( spdx >= epdx )
- continue;
- bitfield |= spdx;
- nodes_used++;
- if ( epdx > memtop )
- memtop = epdx;
- }
- if ( nodes_used <= 1 )
- i = BITS_PER_LONG - 1;
- else
- i = find_first_bit(&bitfield, sizeof(unsigned long) * 8);
- memnodemapsize = (memtop >> i) + 1;
-
- return i;
-}
-
-int __init compute_memnode_shift(struct node *nodes, int numnodes,
- nodeid_t *nodeids, unsigned int *shift)
-{
- *shift = extract_lsb_from_nodes(nodes, numnodes);
-
- if ( memnodemapsize <= ARRAY_SIZE(_memnodemap) )
- memnodemap = _memnodemap;
- else if ( allocate_cachealigned_memnodemap() )
- return -ENOMEM;
-
- printk(KERN_DEBUG "NUMA: Using %u for the hash shift.\n", *shift);
-
- if ( populate_memnodemap(nodes, numnodes, *shift, nodeids) )
- {
- printk(KERN_INFO "Your memory is not aligned you need to "
- "rebuild your hypervisor with a bigger NODEMAPSIZE "
- "shift=%u\n", *shift);
- return -EINVAL;
- }
-
- return 0;
-}
-/* initialize NODE_DATA given nodeid and start/end */
-void __init setup_node_bootmem(nodeid_t nodeid, paddr_t start, paddr_t end)
-{
- unsigned long start_pfn, end_pfn;
-
- start_pfn = start >> PAGE_SHIFT;
- end_pfn = end >> PAGE_SHIFT;
-
- NODE_DATA(nodeid)->node_start_pfn = start_pfn;
- NODE_DATA(nodeid)->node_spanned_pages = end_pfn - start_pfn;
-
- node_set_online(nodeid);
-}
-
-void __init numa_init_array(void)
-{
- int rr, i;
-
- /* There are unfortunately some poorly designed mainboards around
- that only connect memory to a single CPU. This breaks the 1:1 cpu->node
- mapping. To avoid this fill in the mapping for all possible
- CPUs, as the number of CPUs is not known yet.
- We round robin the existing nodes. */
- rr = first_node(node_online_map);
- for ( i = 0; i < nr_cpu_ids; i++ )
- {
- if ( cpu_to_node[i] != NUMA_NO_NODE )
- continue;
- numa_set_node(i, rr);
- rr = next_node(rr, node_online_map);
- if ( rr == MAX_NUMNODES )
- rr = first_node(node_online_map);
- }
-}
-
-#ifdef CONFIG_NUMA_EMU
-static int __initdata numa_fake = 0;
-static int get_numa_fake(void)
-{
- return numa_fake;
-}
-
-/* Numa emulation */
-static int __init numa_emulation(uint64_t start_pfn, uint64_t end_pfn)
-{
- int i;
- struct node nodes[MAX_NUMNODES];
- uint64_t sz = ((end_pfn - start_pfn) << PAGE_SHIFT) / get_numa_fake();
-
- /* Kludge needed for the hash function */
- if ( hweight64(sz) > 1 )
- {
- uint64_t x = 1;
- while ( (x << 1) < sz )
- x <<= 1;
- if ( x < sz / 2 )
- printk(KERN_ERR
- "Numa emulation unbalanced. Complain to maintainer\n");
- sz = x;
- }
-
- memset(&nodes,0,sizeof(nodes));
- for ( i = 0; i < get_numa_fake(); i++ )
- {
- nodes[i].start = (start_pfn << PAGE_SHIFT) + i * sz;
- if ( i == get_numa_fake() - 1 )
- sz = (end_pfn << PAGE_SHIFT) - nodes[i].start;
- nodes[i].end = nodes[i].start + sz;
- printk(KERN_INFO
- "Faking node %d at %"PRIx64"-%"PRIx64" (%"PRIu64"MB)\n",
- i, nodes[i].start, nodes[i].end,
- (nodes[i].end - nodes[i].start) >> 20);
- node_set_online(i);
- }
- if ( compute_memnode_shift(nodes, get_numa_fake(), NULL, &memnode_shift) )
- {
- memnode_shift = 0;
- printk(KERN_ERR "No NUMA hash function found. Emulation disabled.\n");
- return -1;
- }
- for_each_online_node ( i )
- setup_node_bootmem(i, nodes[i].start, nodes[i].end);
- numa_init_array();
-
- return 0;
-}
-#endif
-
-static void __init numa_dummy_init(unsigned long start_pfn, unsigned long
end_pfn)
-{
- int i;
-
- printk(KERN_INFO "%s\n",
- is_numa_off() ? "NUMA turned off" : "No NUMA configuration found");
-
- printk(KERN_INFO "Faking a node at %016"PRIx64"-%016"PRIx64"\n",
- (uint64_t)start_pfn << PAGE_SHIFT,
- (uint64_t)end_pfn << PAGE_SHIFT);
- /* setup dummy node covering all memory */
- memnode_shift = BITS_PER_LONG - 1;
- memnodemap = _memnodemap;
- nodes_clear(node_online_map);
- node_set_online(0);
- for ( i = 0; i < nr_cpu_ids; i++ )
- numa_set_node(i, 0);
- cpumask_copy(&node_to_cpumask[0], cpumask_of(0));
- setup_node_bootmem(0, (paddr_t)start_pfn << PAGE_SHIFT,
- (paddr_t)end_pfn << PAGE_SHIFT);
-}
-
void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
#ifdef CONFIG_NUMA_EMU
@@ -306,43 +33,6 @@ void __init numa_initmem_init(unsigned long start_pfn,
unsigned long end_pfn)
numa_dummy_init(start_pfn, end_pfn);
}
-void numa_add_cpu(int cpu)
-{
- cpumask_set_cpu(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
-}
-
-void numa_set_node(int cpu, nodeid_t node)
-{
- cpu_to_node[cpu] = node;
-}
-
-/* [numa=off] */
-static int __init numa_setup(char *opt)
-{
- if ( !strncmp(opt,"off",3) )
- numa_off = 1;
- if ( !strncmp(opt,"on",2) )
- numa_off = 0;
-#ifdef CONFIG_NUMA_EMU
- if ( !strncmp(opt, "fake=", 5) )
- {
- numa_off = 0;
- numa_fake = simple_strtoul(opt+5,NULL,0);
- if ( numa_fake >= MAX_NUMNODES )
- numa_fake = MAX_NUMNODES;
- }
-#endif
-#ifdef CONFIG_ACPI_NUMA
- if ( !strncmp(opt,"noacpi",6) )
- {
- numa_off = 0;
- acpi_numa = 0;
- }
-#endif
-
- return 1;
-}
-
/*
* Setup early cpu_to_node.
*
@@ -391,149 +81,3 @@ unsigned int __init arch_get_dma_bitsize(void)
flsl(node_start_pfn(node) + node_spanned_pages(node) / 4 - 1)
+ PAGE_SHIFT, 32);
}
-
-static void dump_numa(unsigned char key)
-{
- s_time_t now = NOW();
- unsigned int i, j, n;
- int err;
- struct domain *d;
- struct page_info *page;
- unsigned int page_num_node[MAX_NUMNODES];
- const struct vnuma_info *vnuma;
-
- printk("'%c' pressed -> dumping numa info (now-0x%X:%08X)\n", key,
- (uint32_t)(now >> 32), (uint32_t)now);
-
- for_each_online_node ( i )
- {
- paddr_t pa = pfn_to_paddr(node_start_pfn(i) + 1);
-
- printk("NODE%u start->%lu size->%lu free->%lu\n",
- i, node_start_pfn(i), node_spanned_pages(i),
- avail_node_heap_pages(i));
- /* sanity check phys_to_nid() */
- if ( phys_to_nid(pa) != i )
- printk("phys_to_nid(%"PRIpaddr") -> %d should be %u\n",
- pa, phys_to_nid(pa), i);
- }
-
- j = cpumask_first(&cpu_online_map);
- n = 0;
- for_each_online_cpu ( i )
- {
- if ( i != j + n || cpu_to_node[j] != cpu_to_node[i] )
- {
- if ( n > 1 )
- printk("CPU%u...%u -> NODE%d\n", j, j + n - 1, cpu_to_node[j]);
- else
- printk("CPU%u -> NODE%d\n", j, cpu_to_node[j]);
- j = i;
- n = 1;
- }
- else
- ++n;
- }
- if ( n > 1 )
- printk("CPU%u...%u -> NODE%d\n", j, j + n - 1, cpu_to_node[j]);
- else
- printk("CPU%u -> NODE%d\n", j, cpu_to_node[j]);
-
- rcu_read_lock(&domlist_read_lock);
-
- printk("Memory location of each domain:\n");
- for_each_domain ( d )
- {
- process_pending_softirqs();
-
- printk("Domain %u (total: %u):\n", d->domain_id, d->tot_pages);
-
- for_each_online_node ( i )
- page_num_node[i] = 0;
-
- spin_lock(&d->page_alloc_lock);
- page_list_for_each(page, &d->page_list)
- {
- i = phys_to_nid((paddr_t)page_to_mfn(page) << PAGE_SHIFT);
- page_num_node[i]++;
- }
- spin_unlock(&d->page_alloc_lock);
-
- for_each_online_node ( i )
- printk(" Node %u: %u\n", i, page_num_node[i]);
-
- if ( !read_trylock(&d->vnuma_rwlock) )
- continue;
-
- if ( !d->vnuma )
- {
- read_unlock(&d->vnuma_rwlock);
- continue;
- }
-
- vnuma = d->vnuma;
- printk(" %u vnodes, %u vcpus, guest physical layout:\n",
- vnuma->nr_vnodes, d->max_vcpus);
- for ( i = 0; i < vnuma->nr_vnodes; i++ )
- {
- unsigned int start_cpu = ~0U;
-
- err = snprintf(keyhandler_scratch, 12, "%3u",
- vnuma->vnode_to_pnode[i]);
- if ( err < 0 || vnuma->vnode_to_pnode[i] == NUMA_NO_NODE )
- strlcpy(keyhandler_scratch, "???", sizeof(keyhandler_scratch));
-
- printk(" %3u: pnode %s,", i, keyhandler_scratch);
-
- printk(" vcpus ");
-
- for ( j = 0; j < d->max_vcpus; j++ )
- {
- if ( !(j & 0x3f) )
- process_pending_softirqs();
-
- if ( vnuma->vcpu_to_vnode[j] == i )
- {
- if ( start_cpu == ~0U )
- {
- printk("%d", j);
- start_cpu = j;
- }
- }
- else if ( start_cpu != ~0U )
- {
- if ( j - 1 != start_cpu )
- printk("-%d ", j - 1);
- else
- printk(" ");
- start_cpu = ~0U;
- }
- }
-
- if ( start_cpu != ~0U && start_cpu != j - 1 )
- printk("-%d", j - 1);
-
- printk("\n");
-
- for ( j = 0; j < vnuma->nr_vmemranges; j++ )
- {
- if ( vnuma->vmemrange[j].nid == i )
- printk(" %016"PRIx64" - %016"PRIx64"\n",
- vnuma->vmemrange[j].start,
- vnuma->vmemrange[j].end);
- }
- }
-
- read_unlock(&d->vnuma_rwlock);
- }
-
- rcu_read_unlock(&domlist_read_lock);
-}
-
-static int __init register_numa_trigger(void)
-{
- register_keyhandler('u', dump_numa, "dump NUMA info", 1);
- return 0;
-}
-__initcall(register_numa_trigger);
-
diff --git a/xen/arch/x86/srat.c b/xen/arch/x86/srat.c
index 7cf4771..2cc87a3 100644
--- a/xen/arch/x86/srat.c
+++ b/xen/arch/x86/srat.c
@@ -27,6 +27,13 @@ static nodemask_t __initdata memory_nodes_parsed;
static nodemask_t __initdata processor_nodes_parsed;
static struct node __initdata nodes[MAX_NUMNODES];
+/*
+ * Keep BIOS's CPU2node information, should not be used for memory allocaion
+ */
+nodeid_t apicid_to_node[MAX_LOCAL_APIC] = {
+ [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
+};
+
struct pxm2node {
unsigned int pxm;
nodeid_t node;
diff --git a/xen/common/Makefile b/xen/common/Makefile
index 0fed30b..4b17344 100644
--- a/xen/common/Makefile
+++ b/xen/common/Makefile
@@ -63,6 +63,7 @@ obj-y += wait.o
obj-bin-y += warning.init.o
obj-$(CONFIG_XENOPROF) += xenoprof.o
obj-y += xmalloc_tlsf.o
+obj-$(CONFIG_NUMA) += numa.o
obj-bin-$(CONFIG_X86) += $(foreach n,decompress bunzip2 unxz unlzma unlzo
unlz4 earlycpio,$(n).init.o)
diff --git a/xen/common/numa.c b/xen/common/numa.c
new file mode 100644
index 0000000..207ebd8
--- /dev/null
+++ b/xen/common/numa.c
@@ -0,0 +1,488 @@
+/*
+ * Common NUMA handling functions for x86 and arm.
+ * Original code extracted from arch/x86/numa.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms and conditions of the GNU General Public
+ * License, version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/mm.h>
+#include <xen/string.h>
+#include <xen/init.h>
+#include <xen/ctype.h>
+#include <xen/nodemask.h>
+#include <xen/numa.h>
+#include <xen/keyhandler.h>
+#include <xen/time.h>
+#include <xen/smp.h>
+#include <xen/pfn.h>
+#include <asm/acpi.h>
+#include <xen/sched.h>
+#include <xen/softirq.h>
+
+static int numa_setup(char *s);
+custom_param("numa", numa_setup);
+
+struct node_data node_data[MAX_NUMNODES];
+
+/* Mapping from pdx to node id */
+unsigned int memnode_shift;
+static typeof(*memnodemap) _memnodemap[64];
+unsigned long memnodemapsize;
+uint8_t *memnodemap;
+
+nodeid_t __read_mostly cpu_to_node[NR_CPUS] = {
+ [0 ... NR_CPUS-1] = NUMA_NO_NODE
+};
+cpumask_t __read_mostly node_to_cpumask[MAX_NUMNODES];
+
+static bool numa_off = 0;
+static bool acpi_numa = 1;
+
+bool is_numa_off(void)
+{
+ return numa_off;
+}
+
+bool get_acpi_numa(void)
+{
+ return acpi_numa;
+}
+
+void set_acpi_numa(bool_t val)
+{
+ acpi_numa = val;
+}
+
+bool srat_disabled(void)
+{
+ return numa_off || acpi_numa == 0;
+}
+
+/*
+ * Given a shift value, try to populate memnodemap[]
+ * Returns :
+ * 0 if OK
+ * -EINVAL if memnodmap[] too small (of shift too small)
+ * OR if node overlap or lost ram (shift too big)
+ */
+static int __init populate_memnodemap(const struct node *nodes, int numnodes,
+ unsigned int shift, nodeid_t *nodeids)
+{
+ unsigned long spdx, epdx;
+ int i, res = -EINVAL;
+
+ memset(memnodemap, NUMA_NO_NODE, memnodemapsize * sizeof(*memnodemap));
+ for ( i = 0; i < numnodes; i++ )
+ {
+ spdx = paddr_to_pdx(nodes[i].start);
+ epdx = paddr_to_pdx(nodes[i].end - 1) + 1;
+ if ( spdx >= epdx )
+ continue;
+ if ( (epdx >> shift) >= memnodemapsize )
+ return 0;
+ do {
+ if ( memnodemap[spdx >> shift] != NUMA_NO_NODE )
+ return -EINVAL;
+
+ if ( !nodeids )
+ memnodemap[spdx >> shift] = i;
+ else
+ memnodemap[spdx >> shift] = nodeids[i];
+
+ spdx += (1UL << shift);
+ } while ( spdx < epdx );
+ res = 0;
+ }
+
+ return res;
+}
+
+static int __init allocate_cachealigned_memnodemap(void)
+{
+ unsigned long size = PFN_UP(memnodemapsize * sizeof(*memnodemap));
+ unsigned long mfn = alloc_boot_pages(size, 1);
+
+ if ( !mfn )
+ {
+ printk(KERN_ERR
+ "NUMA: Unable to allocate Memory to Node hash map\n");
+ memnodemapsize = 0;
+ return -ENOMEM;
+ }
+
+ memnodemap = mfn_to_virt(mfn);
+ mfn <<= PAGE_SHIFT;
+ size <<= PAGE_SHIFT;
+ printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n",
+ mfn, mfn + size);
+ memnodemapsize = size / sizeof(*memnodemap);
+
+ return 0;
+}
+
+/*
+ * The LSB of all start and end addresses in the node map is the value of the
+ * maximum possible shift.
+ */
+static unsigned int __init extract_lsb_from_nodes(const struct node *nodes,
+ int numnodes)
+{
+ unsigned int i, nodes_used = 0;
+ unsigned long spdx, epdx;
+ unsigned long bitfield = 0, memtop = 0;
+
+ for ( i = 0; i < numnodes; i++ )
+ {
+ spdx = paddr_to_pdx(nodes[i].start);
+ epdx = paddr_to_pdx(nodes[i].end - 1) + 1;
+ if ( spdx >= epdx )
+ continue;
+ bitfield |= spdx;
+ nodes_used++;
+ if ( epdx > memtop )
+ memtop = epdx;
+ }
+ if ( nodes_used <= 1 )
+ i = BITS_PER_LONG - 1;
+ else
+ i = find_first_bit(&bitfield, sizeof(unsigned long) * 8);
+
+ memnodemapsize = (memtop >> i) + 1;
+
+ return i;
+}
+
+int __init compute_memnode_shift(struct node *nodes, int numnodes,
+ nodeid_t *nodeids, unsigned int *shift)
+{
+ *shift = extract_lsb_from_nodes(nodes, numnodes);
+
+ if ( memnodemapsize <= ARRAY_SIZE(_memnodemap) )
+ memnodemap = _memnodemap;
+ else if ( allocate_cachealigned_memnodemap() )
+ return -ENOMEM;
+
+ printk(KERN_DEBUG "NUMA: Using %u for the hash shift.\n", *shift);
+
+ if ( populate_memnodemap(nodes, numnodes, *shift, nodeids) )
+ {
+ printk(KERN_INFO "Your memory is not aligned you need to "
+ "rebuild your hypervisor with a bigger NODEMAPSIZE "
+ "shift=%u\n", *shift);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+/* initialize NODE_DATA given nodeid and start/end */
+void __init setup_node_bootmem(nodeid_t nodeid, paddr_t start, paddr_t end)
+{
+ unsigned long start_pfn, end_pfn;
+
+ start_pfn = start >> PAGE_SHIFT;
+ end_pfn = end >> PAGE_SHIFT;
+
+ NODE_DATA(nodeid)->node_start_pfn = start_pfn;
+ NODE_DATA(nodeid)->node_spanned_pages = end_pfn - start_pfn;
+
+ node_set_online(nodeid);
+}
+
+void __init numa_init_array(void)
+{
+ int rr, i;
+
+ /* There are unfortunately some poorly designed mainboards around
+ that only connect memory to a single CPU. This breaks the 1:1 cpu->node
+ mapping. To avoid this fill in the mapping for all possible
+ CPUs, as the number of CPUs is not known yet.
+ We round robin the existing nodes. */
+ rr = first_node(node_online_map);
+ for ( i = 0; i < nr_cpu_ids; i++ )
+ {
+ if ( cpu_to_node[i] != NUMA_NO_NODE )
+ continue;
+ numa_set_node(i, rr);
+ rr = next_node(rr, node_online_map);
+ if ( rr == MAX_NUMNODES )
+ rr = first_node(node_online_map);
+ }
+}
+
+#ifdef CONFIG_NUMA_EMU
+static int __initdata numa_fake = 0;
+
+int get_numa_fake(void)
+{
+ return numa_fake;
+}
+
+/* Numa emulation */
+int __init numa_emulation(uint64_t start_pfn, uint64_t end_pfn)
+{
+ int i;
+ struct node nodes[MAX_NUMNODES];
+ uint64_t sz = ((end_pfn - start_pfn) << PAGE_SHIFT) / get_numa_fake();
+
+ /* Kludge needed for the hash function */
+ if ( hweight64(sz) > 1 )
+ {
+ uint64_t x = 1;
+ while ( (x << 1) < sz )
+ x <<= 1;
+ if ( x < sz / 2 )
+ printk(KERN_ERR
+ "Numa emulation unbalanced. Complain to maintainer\n");
+ sz = x;
+ }
+
+ memset(&nodes,0,sizeof(nodes));
+ for ( i = 0; i < get_numa_fake(); i++ )
+ {
+ nodes[i].start = (start_pfn << PAGE_SHIFT) + i * sz;
+ if ( i == get_numa_fake() - 1 )
+ sz = (end_pfn << PAGE_SHIFT) - nodes[i].start;
+ nodes[i].end = nodes[i].start + sz;
+ printk(KERN_INFO
+ "Faking node %d at %"PRIx64"-%"PRIx64" (%"PRIu64"MB)\n",
+ i, nodes[i].start, nodes[i].end,
+ (nodes[i].end - nodes[i].start) >> 20);
+ node_set_online(i);
+ }
+
+ if ( compute_memnode_shift(nodes, get_numa_fake(), NULL, &memnode_shift) )
+ {
+ memnode_shift = 0;
+ printk(KERN_ERR "No NUMA hash function found. Emulation disabled.\n");
+ return -1;
+ }
+ for_each_online_node ( i )
+ setup_node_bootmem(i, nodes[i].start, nodes[i].end);
+ numa_init_array();
+
+ return 0;
+}
+#endif
+
+void __init numa_dummy_init(unsigned long start_pfn, unsigned long end_pfn)
+{
+ int i;
+
+ printk(KERN_INFO "%s\n",
+ is_numa_off() ? "NUMA turned off" : "No NUMA configuration found");
+
+ printk(KERN_INFO "Faking a node at %016"PRIx64"-%016"PRIx64"\n",
+ (uint64_t)start_pfn << PAGE_SHIFT,
+ (uint64_t)end_pfn << PAGE_SHIFT);
+ /* setup dummy node covering all memory */
+ memnode_shift = BITS_PER_LONG - 1;
+ memnodemap = _memnodemap;
+ nodes_clear(node_online_map);
+ node_set_online(0);
+ for ( i = 0; i < nr_cpu_ids; i++ )
+ numa_set_node(i, 0);
+ cpumask_copy(&node_to_cpumask[0], cpumask_of(0));
+ setup_node_bootmem(0, (paddr_t)start_pfn << PAGE_SHIFT,
+ (paddr_t)end_pfn << PAGE_SHIFT);
+}
+
+void numa_add_cpu(int cpu)
+{
+ cpumask_set_cpu(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
+}
+
+void numa_set_node(int cpu, nodeid_t node)
+{
+ cpu_to_node[cpu] = node;
+}
+
+/* [numa=off] */
+static int __init numa_setup(char *opt)
+{
+ if ( !strncmp(opt,"off",3) )
+ numa_off = 1;
+ if ( !strncmp(opt,"on",2) )
+ numa_off = 0;
+#ifdef CONFIG_NUMA_EMU
+ if ( !strncmp(opt, "fake=", 5) )
+ {
+ numa_off = 0;
+ numa_fake = simple_strtoul(opt+5,NULL,0);
+ if ( numa_fake >= MAX_NUMNODES )
+ numa_fake = MAX_NUMNODES;
+ }
+#endif
+#ifdef CONFIG_ACPI_NUMA
+ if ( !strncmp(opt,"noacpi",6) )
+ {
+ numa_off = 0;
+ acpi_numa = 0;
+ }
+#endif
+
+ return 1;
+}
+
+static void dump_numa(unsigned char key)
+{
+ s_time_t now = NOW();
+ unsigned int i, j, n;
+ int err;
+ struct domain *d;
+ struct page_info *page;
+ unsigned int page_num_node[MAX_NUMNODES];
+ const struct vnuma_info *vnuma;
+
+ printk("'%c' pressed -> dumping numa info (now-0x%X:%08X)\n", key,
+ (uint32_t)(now >> 32), (uint32_t)now);
+
+ for_each_online_node ( i )
+ {
+ paddr_t pa = pfn_to_paddr(node_start_pfn(i) + 1);
+
+ printk("NODE%u start->%lu size->%lu free->%lu\n",
+ i, node_start_pfn(i), node_spanned_pages(i),
+ avail_node_heap_pages(i));
+ /* sanity check phys_to_nid() */
+ if ( phys_to_nid(pa) != i )
+ printk("phys_to_nid(%"PRIpaddr") -> %d should be %u\n",
+ pa, phys_to_nid(pa), i);
+ }
+
+ j = cpumask_first(&cpu_online_map);
+ n = 0;
+ for_each_online_cpu ( i )
+ {
+ if ( i != j + n || cpu_to_node[j] != cpu_to_node[i] )
+ {
+ if ( n > 1 )
+ printk("CPU%u...%u -> NODE%d\n", j, j + n - 1, cpu_to_node[j]);
+ else
+ printk("CPU%u -> NODE%d\n", j, cpu_to_node[j]);
+ j = i;
+ n = 1;
+ }
+ else
+ ++n;
+ }
+ if ( n > 1 )
+ printk("CPU%u...%u -> NODE%d\n", j, j + n - 1, cpu_to_node[j]);
+ else
+ printk("CPU%u -> NODE%d\n", j, cpu_to_node[j]);
+
+ rcu_read_lock(&domlist_read_lock);
+
+ printk("Memory location of each domain:\n");
+ for_each_domain ( d )
+ {
+ process_pending_softirqs();
+
+ printk("Domain %u (total: %u):\n", d->domain_id, d->tot_pages);
+
+ for_each_online_node ( i )
+ page_num_node[i] = 0;
+
+ spin_lock(&d->page_alloc_lock);
+ page_list_for_each(page, &d->page_list)
+ {
+ i = phys_to_nid((paddr_t)page_to_mfn(page) << PAGE_SHIFT);
+ page_num_node[i]++;
+ }
+ spin_unlock(&d->page_alloc_lock);
+
+ for_each_online_node ( i )
+ printk(" Node %u: %u\n", i, page_num_node[i]);
+
+ if ( !read_trylock(&d->vnuma_rwlock) )
+ continue;
+
+ if ( !d->vnuma )
+ {
+ read_unlock(&d->vnuma_rwlock);
+ continue;
+ }
+
+ vnuma = d->vnuma;
+ printk(" %u vnodes, %u vcpus, guest physical layout:\n",
+ vnuma->nr_vnodes, d->max_vcpus);
+ for ( i = 0; i < vnuma->nr_vnodes; i++ )
+ {
+ unsigned int start_cpu = ~0U;
+
+ err = snprintf(keyhandler_scratch, 12, "%3u",
+ vnuma->vnode_to_pnode[i]);
+ if ( err < 0 || vnuma->vnode_to_pnode[i] == NUMA_NO_NODE )
+ strlcpy(keyhandler_scratch, "???", sizeof(keyhandler_scratch));
+
+ printk(" %3u: pnode %s,", i, keyhandler_scratch);
+
+ printk(" vcpus ");
+
+ for ( j = 0; j < d->max_vcpus; j++ )
+ {
+ if ( !(j & 0x3f) )
+ process_pending_softirqs();
+
+ if ( vnuma->vcpu_to_vnode[j] == i )
+ {
+ if ( start_cpu == ~0U )
+ {
+ printk("%d", j);
+ start_cpu = j;
+ }
+ }
+ else if ( start_cpu != ~0U )
+ {
+ if ( j - 1 != start_cpu )
+ printk("-%d ", j - 1);
+ else
+ printk(" ");
+ start_cpu = ~0U;
+ }
+ }
+
+ if ( start_cpu != ~0U && start_cpu != j - 1 )
+ printk("-%d", j - 1);
+
+ printk("\n");
+
+ for ( j = 0; j < vnuma->nr_vmemranges; j++ )
+ {
+ if ( vnuma->vmemrange[j].nid == i )
+ printk(" %016"PRIx64" - %016"PRIx64"\n",
+ vnuma->vmemrange[j].start,
+ vnuma->vmemrange[j].end);
+ }
+ }
+
+ read_unlock(&d->vnuma_rwlock);
+ }
+
+ rcu_read_unlock(&domlist_read_lock);
+}
+
+static int __init register_numa_trigger(void)
+{
+ register_keyhandler('u', dump_numa, "dump NUMA info", 1);
+ return 0;
+}
+__initcall(register_numa_trigger);
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-x86/numa.h b/xen/include/asm-x86/numa.h
index 7237ad1..421e8b7 100644
--- a/xen/include/asm-x86/numa.h
+++ b/xen/include/asm-x86/numa.h
@@ -17,27 +17,12 @@ extern cpumask_t node_to_cpumask[];
#define node_to_first_cpu(node) (__ffs(node_to_cpumask[node]))
#define node_to_cpumask(node) (node_to_cpumask[node])
-struct node {
- paddr_t start;
- paddr_t end;
-};
-
-extern int compute_memnode_shift(struct node *nodes, int numnodes,
- nodeid_t *nodeids, unsigned int *shift);
extern nodeid_t pxm_to_node(unsigned int pxm);
#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
extern void numa_add_cpu(int cpu);
-extern void numa_init_array(void);
-extern bool srat_disabled(void);
-extern void numa_set_node(int cpu, nodeid_t node);
-extern nodeid_t acpi_setup_node(unsigned int pxm);
-extern void srat_detect_node(int cpu);
-
-extern void setup_node_bootmem(nodeid_t nodeid, paddr_t start, paddr_t end);
extern nodeid_t apicid_to_node[];
-extern void init_cpu_to_node(void);
/* Simple perfect hash to map pdx to node numbers */
extern unsigned int memnode_shift;
diff --git a/xen/include/xen/numa.h b/xen/include/xen/numa.h
index 922fbd8..eed40af 100644
--- a/xen/include/xen/numa.h
+++ b/xen/include/xen/numa.h
@@ -14,6 +14,21 @@
#define MAX_NUMNODES (1 << NODES_SHIFT)
+struct node {
+ paddr_t start;
+ paddr_t end;
+};
+
+extern int compute_memnode_shift(struct node *nodes, int numnodes,
+ nodeid_t *nodeids, unsigned int *shift);
+extern void numa_init_array(void);
+extern bool_t srat_disabled(void);
+extern void numa_set_node(int cpu, nodeid_t node);
+extern nodeid_t acpi_setup_node(unsigned int pxm);
+extern void srat_detect_node(int cpu);
+extern void setup_node_bootmem(nodeid_t nodeid, paddr_t start, paddr_t end);
+extern void init_cpu_to_node(void);
+
#define vcpu_to_node(v) (cpu_to_node((v)->processor))
#define domain_to_node(d) \
@@ -23,4 +38,7 @@
bool is_numa_off(void);
bool get_acpi_numa(void);
void set_acpi_numa(bool val);
+int get_numa_fake(void);
+extern int numa_emulation(uint64_t start_pfn, uint64_t end_pfn);
+extern void numa_dummy_init(uint64_t start_pfn, uint64_t end_pfn);
#endif /* _XEN_NUMA_H */
--
2.7.4
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