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irqchip/gic-v3-its: Allow GIC ITS number more than MAX_NUMNODES

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When enabling ITS NUMA support on D05, I got the boot log:

[    0.000000] SRAT: PXM 0 -> ITS 0 -> Node 0
[    0.000000] SRAT: PXM 0 -> ITS 1 -> Node 0
[    0.000000] SRAT: PXM 0 -> ITS 2 -> Node 0
[    0.000000] SRAT: PXM 1 -> ITS 3 -> Node 1
[    0.000000] SRAT: ITS affinity exceeding max count[4]

This is wrong on D05 as we have 8 ITSs with 4 NUMA nodes.

So dynamically alloc the memory needed instead of using
its_srat_maps[MAX_NUMNODES], which count the number of
ITS entry(ies) in SRAT and alloc its_srat_maps as needed,
then build the mapping of numa node to ITS ID. Of course,
its_srat_maps will be freed after ITS probing because
we don't need that after boot.

After doing this, I got what I wanted:

[    0.000000] SRAT: PXM 0 -> ITS 0 -> Node 0
[    0.000000] SRAT: PXM 0 -> ITS 1 -> Node 0
[    0.000000] SRAT: PXM 0 -> ITS 2 -> Node 0
[    0.000000] SRAT: PXM 1 -> ITS 3 -> Node 1
[    0.000000] SRAT: PXM 2 -> ITS 4 -> Node 2
[    0.000000] SRAT: PXM 2 -> ITS 5 -> Node 2
[    0.000000] SRAT: PXM 2 -> ITS 6 -> Node 2
[    0.000000] SRAT: PXM 3 -> ITS 7 -> Node 3

Fixes: dbd2b82672 ("irqchip/gic-v3-its: Add ACPI NUMA node mapping")
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Cc: John Garry <john.garry@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Hanjun Guo 2017-07-26 18:15:49 +08:00 committed by Marc Zyngier
parent c017d21147
commit fdf6e7a8c9
1 changed files with 31 additions and 7 deletions
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38
drivers/irqchip/irq-gic-v3-its.c
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@ -1843,7 +1843,7 @@ struct its_srat_map {
u32 its_id;
};
static struct its_srat_map its_srat_maps[MAX_NUMNODES] __initdata;
static struct its_srat_map *its_srat_maps __initdata;
static int its_in_srat __initdata;
static int __init acpi_get_its_numa_node(u32 its_id)
@ -1857,6 +1857,12 @@ static int __init acpi_get_its_numa_node(u32 its_id)
return NUMA_NO_NODE;
}
static int __init gic_acpi_match_srat_its(struct acpi_subtable_header *header,
const unsigned long end)
{
return 0;
}
static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header,
const unsigned long end)
{
@ -1873,12 +1879,6 @@ static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header,
return -EINVAL;
}
if (its_in_srat >= MAX_NUMNODES) {
pr_err("SRAT: ITS affinity exceeding max count[%d]\n",
MAX_NUMNODES);
return -EINVAL;
}
node = acpi_map_pxm_to_node(its_affinity->proximity_domain);
if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
@ -1897,14 +1897,37 @@ static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header,
static void __init acpi_table_parse_srat_its(void)
{
int count;
count = acpi_table_parse_entries(ACPI_SIG_SRAT,
sizeof(struct acpi_table_srat),
ACPI_SRAT_TYPE_GIC_ITS_AFFINITY,
gic_acpi_match_srat_its, 0);
if (count <= 0)
return;
its_srat_maps = kmalloc(count * sizeof(struct its_srat_map),
GFP_KERNEL);
if (!its_srat_maps) {
pr_warn("SRAT: Failed to allocate memory for its_srat_maps!\n");
return;
}
acpi_table_parse_entries(ACPI_SIG_SRAT,
sizeof(struct acpi_table_srat),
ACPI_SRAT_TYPE_GIC_ITS_AFFINITY,
gic_acpi_parse_srat_its, 0);
}
/* free the its_srat_maps after ITS probing */
static void __init acpi_its_srat_maps_free(void)
{
kfree(its_srat_maps);
}
#else
static void __init acpi_table_parse_srat_its(void) { }
static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; }
static void __init acpi_its_srat_maps_free(void) { }
#endif
static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header,
@ -1951,6 +1974,7 @@ static void __init its_acpi_probe(void)
acpi_table_parse_srat_its();
acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR,
gic_acpi_parse_madt_its, 0);
acpi_its_srat_maps_free();
}
#else
static void __init its_acpi_probe(void) { }