Commit a9850de3 authored by Lijun Fang's avatar Lijun Fang Committed by Zheng Zengkai
Browse files

mm: Add DDR and HBM to nodes by cmdline 

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4JMLR


CVE: NA
---------------------

When the kernel boot, we need to determine DDR or HBM,
and add them to nodes by parse cmdline, instead of memory hotplug.

Signed-off-by: default avatarLijun Fang <fanglijun3@huawei.com>
Reviewed-by: default avatarWeilong Chen <chenweilong@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent c80f1cb2

Documentation/admin-guide/kernel-parameters.txt

+6 −0
Original line number Diff line number Diff line
@@ -493,6 +493,12 @@ 
	ccw_timeout_log	[S390]

			See Documentation/s390/common_io.rst for details.



	cdm-nodes=      [KNL]

			Format: hexadecimal expression

			One bit express one node, if the node is HBM, set the

			bit to 1. Then transform Binary to hexadecimal.

			Example: node1, node2 is HBM, cdm-nodes=0x06.



	cgroup_disable=	[KNL] Disable a particular controller

			Format: {name of the controller(s) to disable}

			The effects of cgroup_disable=foo are:

arch/arm64/include/asm/numa.h

+3 −0
Original line number Diff line number Diff line
@@ -19,6 +19,9 @@ extern bool numa_off; 
extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];

void numa_clear_node(unsigned int cpu);



#ifdef CONFIG_COHERENT_DEVICE

extern nodemask_t cdmmask;

#endif

#ifdef CONFIG_DEBUG_PER_CPU_MAPS

const struct cpumask *cpumask_of_node(int node);

#else

arch/arm64/mm/numa.c

+20 −0
Original line number Diff line number Diff line
@@ -26,10 +26,30 @@ static u8 *numa_distance; 
bool numa_off;



#ifdef CONFIG_COHERENT_DEVICE

nodemask_t cdmmask;



inline int arch_check_node_cdm(int nid)

{

	return node_isset(nid, cdmmask);

}



static int __init cdm_nodes_setup(char *s)

{

	int nid;

	unsigned long tmpmask;

	int err;



	err = kstrtoul(s, 0, &tmpmask);

	if (err)

		return err;



	for (nid = 0; nid < MAX_NUMNODES; nid++) {

		if ((tmpmask >> nid) & 1)

			node_set(nid, cdmmask);

	}

	return 0;

}

early_param("cdm-nodes", cdm_nodes_setup);

#endif



static __init int numa_parse_early_param(char *opt)