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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 1/7] x86/numa: Make use of NUMA_NO_NODE consistent
Various pieces of code test whether node value is NUMA_NO_NODE even
though pxm_to_node() may return (int)-1 for an invalid node.
Make pxm_to_node() and setup_node() return u8 and have them return
NUMA_NO_NODE when necessary.
Adjust code that tests for (node == -1).
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
xen/arch/x86/smpboot.c | 2 +-
xen/arch/x86/srat.c | 39 ++++++++++++++++++++++------------
xen/arch/x86/x86_64/mm.c | 2 +-
xen/drivers/passthrough/vtd/iommu.c | 4 +-
xen/include/asm-x86/numa.h | 4 +-
5 files changed, 31 insertions(+), 20 deletions(-)
diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index c54be7e..97956be 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -877,7 +877,7 @@ int cpu_add(uint32_t apic_id, uint32_t acpi_id, uint32_t
pxm)
if ( !srat_disabled() )
{
- if ( (node = setup_node(pxm)) < 0 )
+ if ( (node = setup_node(pxm)) == NUMA_NO_NODE )
{
dprintk(XENLOG_WARNING,
"Setup node failed for pxm %x\n", pxm);
diff --git a/xen/arch/x86/srat.c b/xen/arch/x86/srat.c
index 29fc724..4dfa1c3 100644
--- a/xen/arch/x86/srat.c
+++ b/xen/arch/x86/srat.c
@@ -21,13 +21,16 @@
#include <asm/e820.h>
#include <asm/page.h>
+#define MAX_PXM 255
+
static struct acpi_table_slit *__read_mostly acpi_slit;
static nodemask_t memory_nodes_parsed __initdata;
static nodemask_t processor_nodes_parsed __initdata;
static nodemask_t nodes_found __initdata;
static struct node nodes[MAX_NUMNODES] __initdata;
-static u8 __read_mostly pxm2node[256] = { [0 ... 255] = NUMA_NO_NODE };
+static u8 __read_mostly pxm2node[MAX_PXM + 1] =
+ { [0 ... MAX_PXM] = NUMA_NO_NODE };
static int num_node_memblks;
@@ -37,21 +40,29 @@ static int memblk_nodeid[NR_NODE_MEMBLKS];
static int node_to_pxm(int n);
-int pxm_to_node(int pxm)
+u8 pxm_to_node(int pxm)
{
- if ((unsigned)pxm >= 256)
- return -1;
- /* Extend 0xff to (int)-1 */
- return (signed char)pxm2node[pxm];
+ if ((unsigned)pxm > MAX_PXM)
+ return NUMA_NO_NODE;
+
+ return pxm2node[pxm];
}
-__devinit int setup_node(int pxm)
+__devinit u8 setup_node(int pxm)
{
- unsigned node = pxm2node[pxm];
- if (node == 0xff) {
+ u8 node;
+
+ /* NUMA_NO_NODE is 255 */
+ BUILD_BUG_ON(MAX_NUMNODES > 254);
+
+ if ((unsigned)pxm > MAX_PXM)
+ return NUMA_NO_NODE;
+
+ node = pxm2node[pxm];
+ if (node == NUMA_NO_NODE) {
if (nodes_weight(nodes_found) >= MAX_NUMNODES)
- return -1;
- node = first_unset_node(nodes_found);
+ return NUMA_NO_NODE;
+ node = first_unset_node(nodes_found);
node_set(node, nodes_found);
pxm2node[pxm] = node;
}
@@ -175,7 +186,7 @@ acpi_numa_x2apic_affinity_init(struct
acpi_srat_x2apic_cpu_affinity *pa)
return;
pxm = pa->proximity_domain;
node = setup_node(pxm);
- if (node < 0) {
+ if (node == NUMA_NO_NODE) {
printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
bad_srat();
return;
@@ -208,7 +219,7 @@ acpi_numa_processor_affinity_init(struct
acpi_srat_cpu_affinity *pa)
pxm |= pa->proximity_domain_hi[2] << 24;
}
node = setup_node(pxm);
- if (node < 0) {
+ if (node == NUMA_NO_NODE) {
printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
bad_srat();
return;
@@ -252,7 +263,7 @@ acpi_numa_memory_affinity_init(struct
acpi_srat_mem_affinity *ma)
if (srat_rev < 2)
pxm &= 0xff;
node = setup_node(pxm);
- if (node < 0) {
+ if (node == NUMA_NO_NODE) {
printk(KERN_ERR "SRAT: Too many proximity domains.\n");
bad_srat();
return;
diff --git a/xen/arch/x86/x86_64/mm.c b/xen/arch/x86/x86_64/mm.c
index d631aee..4817dad 100644
--- a/xen/arch/x86/x86_64/mm.c
+++ b/xen/arch/x86/x86_64/mm.c
@@ -1353,7 +1353,7 @@ int memory_add(unsigned long spfn, unsigned long epfn,
unsigned int pxm)
if ( !mem_hotadd_check(spfn, epfn) )
return -EINVAL;
- if ( (node = setup_node(pxm)) == -1 )
+ if ( (node = setup_node(pxm)) == NUMA_NO_NODE )
return -EINVAL;
if ( !valid_numa_range(spfn << PAGE_SHIFT, epfn << PAGE_SHIFT, node) )
diff --git a/xen/drivers/passthrough/vtd/iommu.c
b/xen/drivers/passthrough/vtd/iommu.c
index 19d8165..fd48f7b 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -190,14 +190,14 @@ u64 alloc_pgtable_maddr(struct acpi_drhd_unit *drhd,
unsigned long npages)
struct acpi_rhsa_unit *rhsa;
struct page_info *pg, *cur_pg;
u64 *vaddr;
- int node = -1, i;
+ int node = NUMA_NO_NODE, i;
rhsa = drhd_to_rhsa(drhd);
if ( rhsa )
node = pxm_to_node(rhsa->proximity_domain);
pg = alloc_domheap_pages(NULL, get_order_from_pages(npages),
- (node == -1 ) ? 0 : MEMF_node(node));
+ (node == NUMA_NO_NODE ) ? 0 : MEMF_node(node));
if ( !pg )
return 0;
diff --git a/xen/include/asm-x86/numa.h b/xen/include/asm-x86/numa.h
index 5959860..2a43827 100644
--- a/xen/include/asm-x86/numa.h
+++ b/xen/include/asm-x86/numa.h
@@ -21,7 +21,7 @@ struct node {
extern int compute_hash_shift(struct node *nodes, int numnodes,
int *nodeids);
-extern int pxm_to_node(int nid);
+extern u8 pxm_to_node(int nid);
#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
#define VIRTUAL_BUG_ON(x)
@@ -33,7 +33,7 @@ extern int numa_off;
extern int srat_disabled(void);
extern void numa_set_node(int cpu, int node);
-extern int setup_node(int pxm);
+extern u8 setup_node(int pxm);
extern void srat_detect_node(int cpu);
extern void setup_node_bootmem(int nodeid, u64 start, u64 end);
--
1.7.1
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