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x86/platform/UV: Create per cpu info structs to replace per hub info structs

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The major portion of the hub info is common to all cpus on that hub.
This is step one of moving the per cpu hub info to a per node hub info
struct.  This patch creates the small per cpu info struct that will
contain only information specific to each CPU.

Tested-by: John Estabrook <estabrook@sgi.com>
Tested-by: Gary Kroening <gfk@sgi.com>
Tested-by: Nathan Zimmer <nzimmer@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <rja@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160429215404.282265563@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Mike Travis 2016-04-29 16:54:12 -05:00 committed by Ingo Molnar
parent a2f28e6950
commit 0045ddd23f
2 changed files with 25 additions and 9 deletions
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19
arch/x86/include/asm/uv/uv_hub.h
View File

@ -139,8 +139,9 @@ struct uv_scir_s {
/*
* The following defines attributes of the HUB chip. These attributes are
* frequently referenced and are kept in the per-cpu data areas of each cpu.
* They are kept together in a struct to minimize cache misses.
* frequently referenced and are kept in a common per hub struct.
* After setup, the struct is read only, so it should be readily
* available in the L3 cache on the cpu socket for the node.
*/
struct uv_hub_info_s {
unsigned long global_mmr_base;
@ -167,9 +168,19 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
#define uv_hub_info this_cpu_ptr(&__uv_hub_info)
#define uv_cpu_hub_info(cpu) (&per_cpu(__uv_hub_info, cpu))
/* CPU specific info with a pointer to the hub common info struct */
struct uv_cpu_info_s {
void *p_uv_hub_info;
unsigned char blade_cpu_id;
struct uv_scir_s scir;
};
DECLARE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
#define uv_cpu_info this_cpu_ptr(&__uv_cpu_info)
#define uv_cpu_info_per(cpu) (&per_cpu(__uv_cpu_info, cpu))
/*
* Hub revisions less than UV2_HUB_REVISION_BASE are UV1 hubs. All UV2
* hubs have revision numbers greater than or equal to UV2_HUB_REVISION_BASE.
* HUB revision ranges for each UV HUB architecture.
* This is a software convention - NOT the hardware revision numbers in
* the hub chip.
*/

15
arch/x86/kernel/apic/x2apic_uv_x.c
View File

@ -231,6 +231,9 @@ EXPORT_SYMBOL_GPL(is_uv_system);
DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
struct uv_blade_info *uv_blade_info;
EXPORT_SYMBOL_GPL(uv_blade_info);
@ -990,11 +993,10 @@ void __init uv_system_init(void)
hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
/* uv_num_possible_blades() is really the hub count */
pr_info("UV: Found %d blades, %d hubs\n",
is_uv1_hub() ?
uv_num_possible_blades() :
(uv_num_possible_blades() + 1) / 2,
uv_num_possible_blades());
pr_info("UV: Found %d hubs, %d nodes, %d cpus\n",
uv_num_possible_blades(),
num_possible_nodes(),
num_possible_cpus());
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
uv_blade_info = kzalloc(bytes, GFP_KERNEL);
@ -1057,6 +1059,9 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
uv_node_to_blade[nodeid] = blade;
uv_cpu_to_blade[cpu] = blade;
/* Initialize per cpu info list */
uv_cpu_info_per(cpu)->p_uv_hub_info = uv_cpu_hub_info(cpu);
}
/* Add blade/pnode info for nodes without cpus */