ACPI, irqchip and the architecture code all inspect the MADT
enabled bit for a GICC entry in the MADT.
The addition of an 'online capable' bit means all these sites need updating.
Move the current checks behind a helper to make future updates easier.
Signed-off-by: James Morse <james.morse@xxxxxxx>
---
arch/arm64/kernel/smp.c | 2 +-
drivers/acpi/processor_core.c | 2 +-
drivers/irqchip/irq-gic-v3.c | 10 ++++------
include/linux/acpi.h | 5 +++++
4 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index ffc5d76cf695..5669b013c2b7 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -525,7 +525,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
{
u64 hwid = processor->arm_mpidr;
- if (!(processor->flags & ACPI_MADT_ENABLED)) {
+ if (!acpi_gicc_is_usable(processor)) {
pr_debug("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid);
return;
}
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 2ac48cda5b20..1ba273622faa 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -90,7 +90,7 @@ static int map_gicc_mpidr(struct acpi_subtable_header *entry,
struct acpi_madt_generic_interrupt *gicc =
container_of(entry, struct acpi_madt_generic_interrupt, header);
- if (!(gicc->flags & ACPI_MADT_ENABLED))
+ if (!acpi_gicc_is_usable(gicc))
return -ENODEV;
/* device_declaration means Device object in DSDT, in the
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 997104d4338e..d484cccfd612 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -2189,8 +2189,7 @@ gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header,
u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2;
void __iomem *redist_base;
- /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */
- if (!(gicc->flags & ACPI_MADT_ENABLED))
+ if (!acpi_gicc_is_usable(gicc))
return 0;
redist_base = ioremap(gicc->gicr_base_address, size);
@@ -2240,7 +2239,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header,
* If GICC is enabled and has valid gicr base address, then it means
* GICR base is presented via GICC
*/
- if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) {
+ if (acpi_gicc_is_usable(gicc) && gicc->gicr_base_address) {
acpi_data.enabled_rdists++;
return 0;
}
@@ -2249,7 +2248,7 @@ static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header,
* It's perfectly valid firmware can pass disabled GICC entry, driver
* should not treat as errors, skip the entry instead of probe fail.
*/
- if (!(gicc->flags & ACPI_MADT_ENABLED))
+ if (!acpi_gicc_is_usable(gicc))
return 0;
return -ENODEV;
@@ -2308,8 +2307,7 @@ static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *hea
int maint_irq_mode;
static int first_madt = true;
- /* Skip unusable CPUs */
- if (!(gicc->flags & ACPI_MADT_ENABLED))
+ if (!acpi_gicc_is_usable(gicc))
return 0;
maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ?
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index a59bca4dbcd5..d8e59953a27f 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -267,6 +267,11 @@ acpi_table_parse_cedt(enum acpi_cedt_type id,
int acpi_parse_mcfg (struct acpi_table_header *header);
void acpi_table_print_madt_entry (struct acpi_subtable_header *madt);
+static inline bool acpi_gicc_is_usable(struct acpi_madt_generic_interrupt *gicc)
+{
+ return (gicc->flags & ACPI_MADT_ENABLED);
+}
+
/* the following numa functions are architecture-dependent */
void acpi_numa_slit_init (struct acpi_table_slit *slit);
--
2.30.2
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