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x86: Add x86_init platform override to fix up NUMA core numbering 

Add an x86_init vector for handling inconsistent core numbering.
This is useful for multi-fabric platforms, such as Numascale
NumaConnect.

v2:
 - use struct x86_cpuinit_ops
 - provide default fall-back function to warn

Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com>
Cc: Steffen Persvold <sp@numascale.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Link: http://lkml.kernel.org/r/1323073238-32686-2-git-send-email-daniel@numascale-asia.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Daniel J Blueman 2011-12-05 16:20:37 +08:00 committed by Ingo Molnar
parent 9a0ebfbe3f
commit 64be4c1c24
4 changed files with 20 additions and 0 deletions
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3
arch/x86/include/asm/x86_init.h
View File

@ -7,6 +7,7 @@
struct mpc_bus;
struct mpc_cpu;
struct mpc_table;
struct cpuinfo_x86;
/**
* struct x86_init_mpparse - platform specific mpparse ops
@ -147,6 +148,7 @@ struct x86_init_ops {
*/
struct x86_cpuinit_ops {
void (*setup_percpu_clockev)(void);
void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
};
/**
@ -186,5 +188,6 @@ extern struct x86_msi_ops x86_msi;
extern void x86_init_noop(void);
extern void x86_init_uint_noop(unsigned int unused);
extern void x86_default_fixup_cpu_id(struct cpuinfo_x86 *c, int node);
#endif

7
arch/x86/kernel/cpu/amd.c
View File

@ -353,6 +353,13 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
if (node == NUMA_NO_NODE)
node = per_cpu(cpu_llc_id, cpu);
/*
* If core numbers are inconsistent, it's likely a multi-fabric platform,
* so invoke platform-specific handler
*/
if (c->phys_proc_id != node)
x86_cpuinit.fixup_cpu_id(c, node);
if (!node_online(node)) {
/*
* Two possibilities here:

9
arch/x86/kernel/cpu/common.c
View File

@ -1140,6 +1140,15 @@ static void dbg_restore_debug_regs(void)
#define dbg_restore_debug_regs()
#endif /* ! CONFIG_KGDB */
/*
* Prints an error where the NUMA and configured core-number mismatch and the
* platform didn't override this to fix it up
*/
void __cpuinit x86_default_fixup_cpu_id(struct cpuinfo_x86 *c, int node)
{
pr_err("NUMA core number %d differs from configured core number %d\n", node, c->phys_proc_id);
}
/*
* cpu_init() initializes state that is per-CPU. Some data is already
* initialized (naturally) in the bootstrap process, such as the GDT

1
arch/x86/kernel/x86_init.c
View File

@ -92,6 +92,7 @@ struct x86_init_ops x86_init __initdata = {
struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
.setup_percpu_clockev = setup_secondary_APIC_clock,
.fixup_cpu_id = x86_default_fixup_cpu_id,
};
static void default_nmi_init(void) { };