[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 06/17] xen/arm: Add boot and secondary CPU to NUMA system
From: Wei Chen <wei.chen@xxxxxxx> In this patch, we make NUMA node online and add cpu to its NUMA node. This will make NUMA-aware components have NUMA affinity data to support their work. To keep the mostly the same behavior of x86, we use numa_detect_cpu_node to online node. The difference is that, we have prepared cpu_to_node in dt_smp_init_cpus, so we don't need to setup cpu_to_node in numa_detect_cpu_node. Signed-off-by: Wei Chen <wei.chen@xxxxxxx> Signed-off-by: Henry Wang <Henry.Wang@xxxxxxx> --- v3 -> v4: 1. No change. v2 -> v3: 1. No change. v1 -> v2: 1. Use unsigned int instead of int for cpu id. 2. Use static inline for stub to do type check. --- xen/arch/arm/include/asm/numa.h | 9 +++++++++ xen/arch/arm/numa.c | 10 ++++++++++ xen/arch/arm/setup.c | 5 +++++ 3 files changed, 24 insertions(+) diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h index 97d4a67dea..b04ace26db 100644 --- a/xen/arch/arm/include/asm/numa.h +++ b/xen/arch/arm/include/asm/numa.h @@ -35,6 +35,7 @@ typedef u8 nodeid_t; extern bool numa_disabled(void); extern void numa_set_distance(nodeid_t from, nodeid_t to, unsigned int distance); +extern void numa_detect_cpu_node(unsigned int cpu); #else @@ -72,6 +73,14 @@ static inline void numa_set_node(unsigned int cpu, nodeid_t node) { } +static inline void numa_add_cpu(unsigned int cpu) +{ +} + +static inline void numa_detect_cpu_node(unsigned int cpu) +{ +} + #endif #define arch_want_default_dmazone() (false) diff --git a/xen/arch/arm/numa.c b/xen/arch/arm/numa.c index 3fee3789c7..7ae9ace15d 100644 --- a/xen/arch/arm/numa.c +++ b/xen/arch/arm/numa.c @@ -80,6 +80,16 @@ void __init numa_set_distance(nodeid_t from, nodeid_t to, node_distance_map[from][to] = distance; } +void numa_detect_cpu_node(unsigned int cpu) +{ + nodeid_t node = cpu_to_node[cpu]; + + if ( node == NUMA_NO_NODE ) + node = 0; + + node_set_online(node); +} + unsigned char __node_distance(nodeid_t from, nodeid_t to) { if ( from == to ) diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 6f9f4d8c8a..09e18d32df 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -1205,6 +1205,11 @@ void __init start_xen(unsigned long boot_phys_offset, for_each_present_cpu ( i ) { + /* Detect and online node based on cpu_to_node[]. */ + numa_detect_cpu_node(i); + /* Set up node_to_cpumask based on cpu_to_node[]. */ + numa_add_cpu(i); + if ( (num_online_cpus() < nr_cpu_ids) && !cpu_online(i) ) { int ret = cpu_up(i); -- 2.25.1
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