[patch 23/52] x86/apic: Get rid of apic->target_cpus

Thomas Gleixner
2017-09-13T21:42:56Z

[-- Attachment #1: x86-apic--Get-rid-of-apic->target_cpus.patch --]
[-- Type: text/plain, Size: 8418 bytes --]

The target_cpus() callback of the apic struct is not really useful. Some
APICs return cpu_online_mask and others cpus_all_mask. The latter is bogus
as it does not take holes in the cpus_possible_mask into account.

Replace it with cpus_online_mask which makes the most sense and remove the
callback.

The usage sites will be removed in a later step anyway, so get rid of it
now to have incremental changes.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/apic.h | 3 ---
arch/x86/kernel/apic/apic_common.c | 14 --------------
arch/x86/kernel/apic/apic_flat_64.c | 2 --
arch/x86/kernel/apic/apic_noop.c | 7 -------
arch/x86/kernel/apic/apic_numachip.c | 2 --
arch/x86/kernel/apic/bigsmp_32.c | 1 -
arch/x86/kernel/apic/io_apic.c | 7 +++----
arch/x86/kernel/apic/probe_32.c | 1 -
arch/x86/kernel/apic/vector.c | 2 +-
arch/x86/kernel/apic/x2apic_cluster.c | 8 +-------
arch/x86/kernel/apic/x2apic_phys.c | 1 -
arch/x86/kernel/apic/x2apic_uv_x.c | 1 -
arch/x86/xen/apic.c | 1 -
13 files changed, 5 insertions(+), 45 deletions(-)

--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -289,7 +289,6 @@ struct apic {
u32 irq_dest_mode;

/* Functions and data related to vector allocation */
- const struct cpumask *(*target_cpus)(void);
void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
const struct cpumask *mask);
int (*cpu_mask_to_apicid)(const struct cpumask *cpumask,
@@ -475,8 +474,6 @@ static inline unsigned int read_apic_id(
return apic->get_apic_id(reg);
}

-extern const struct cpumask *default_target_cpus(void);
-extern const struct cpumask *online_target_cpus(void);
extern int default_apic_id_valid(int apicid);
extern int default_acpi_madt_oem_check(char *, char *);
extern void default_setup_apic_routing(void);
--- a/arch/x86/kernel/apic/apic_common.c
+++ b/arch/x86/kernel/apic/apic_common.c
@@ -78,20 +78,6 @@ int default_check_phys_apicid_present(in
return physid_isset(phys_apicid, phys_cpu_present_map);
}

-const struct cpumask *default_target_cpus(void)
-{
-#ifdef CONFIG_SMP
- return cpu_online_mask;
-#else
- return cpumask_of(0);
-#endif
-}
-
-const struct cpumask *online_target_cpus(void)
-{
- return cpu_online_mask;
-}
-
int default_apic_id_valid(int apicid)
{
return (apicid < 255);
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -154,7 +154,6 @@ static struct apic apic_flat __ro_after_
.irq_delivery_mode = dest_LowestPrio,
.irq_dest_mode = 1, /* logical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = NULL,
@@ -249,7 +248,6 @@ static struct apic apic_physflat __ro_af
.irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 0, /* physical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = 0,
.check_apicid_used = NULL,
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -83,12 +83,6 @@ static int noop_apic_id_registered(void)
return physid_isset(0, phys_cpu_present_map);
}

-static const struct cpumask *noop_target_cpus(void)
-{
- /* only BSP here */
- return cpumask_of(0);
-}
-
static void noop_vector_allocation_domain(int cpu, struct cpumask *retmask,
const struct cpumask *mask)
{
@@ -127,7 +121,6 @@ struct apic apic_noop __ro_after_init =
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,

- .target_cpus = noop_target_cpus,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = default_check_apicid_used,
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -249,7 +249,6 @@ static const struct apic apic_numachip1
.irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 0, /* physical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = 0,
.check_apicid_used = NULL,
@@ -300,7 +299,6 @@ static const struct apic apic_numachip2
.irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 0, /* physical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = 0,
.check_apicid_used = NULL,
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -154,7 +154,6 @@ static struct apic apic_bigsmp __ro_afte
/* phys delivery to target CPU: */
.irq_dest_mode = 0,

- .target_cpus = default_target_cpus,
.disable_esr = 1,
.dest_logical = 0,
.check_apicid_used = bigsmp_check_apicid_used,
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2512,9 +2512,8 @@ int acpi_get_override_irq(u32 gsi, int *
}

/*
- * This function currently is only a helper for the i386 smp boot process where
- * we need to reprogram the ioredtbls to cater for the cpus which have come online
- * so mask in all cases should simply be apic->target_cpus()
+ * This function updates target affinity of IOAPIC interrupts to include
+ * the CPUs which came online during SMP bringup.
*/
#ifdef CONFIG_SMP
void __init setup_ioapic_dest(void)
@@ -2547,7 +2546,7 @@ void __init setup_ioapic_dest(void)
if (!irqd_can_balance(idata) || irqd_affinity_was_set(idata))
mask = irq_data_get_affinity_mask(idata);
else
- mask = apic->target_cpus();
+ mask = irq_default_affinity;

chip = irq_data_get_irq_chip(idata);
/* Might be lapic_chip for irq 0 */
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -109,7 +109,6 @@ static struct apic apic_default __ro_aft
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,

- .target_cpus = default_target_cpus,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = default_check_apicid_used,
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -255,7 +255,7 @@ static int assign_irq_vector_policy(int
if (node != NUMA_NO_NODE &&
assign_irq_vector(irq, data, cpumask_of_node(node), irqdata) == 0)
return 0;
- return assign_irq_vector(irq, data, apic->target_cpus(), irqdata);
+ return assign_irq_vector(irq, data, cpu_online_mask, irqdata);
}

static void clear_irq_vector(int irq, struct apic_chip_data *data)
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -193,11 +193,6 @@ static int x2apic_cluster_probe(void)
return 1;
}

-static const struct cpumask *x2apic_cluster_target_cpus(void)
-{
- return cpu_all_mask;
-}
-
/*
* Each x2apic cluster is an allocation domain.
*/
@@ -215,7 +210,7 @@ static void cluster_vector_allocation_do
* derived from the first cpu in the mask) members specified
* in the mask.
*/
- if (mask == x2apic_cluster_target_cpus())
+ if (cpumask_equal(mask, cpu_online_mask))
cpumask_copy(retmask, cpumask_of(cpu));
else
cpumask_and(retmask, mask, &cmsk->mask);
@@ -232,7 +227,6 @@ static struct apic apic_x2apic_cluster _
.irq_delivery_mode = dest_LowestPrio,
.irq_dest_mode = 1, /* logical */

- .target_cpus = x2apic_cluster_target_cpus,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = NULL,
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -147,7 +147,6 @@ static struct apic apic_x2apic_phys __ro
.irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 0, /* physical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = 0,
.check_apicid_used = NULL,
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -584,7 +584,6 @@ static struct apic apic_x2apic_uv_x __ro
.irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 0, /* Physical */

- .target_cpus = online_target_cpus,
.disable_esr = 0,
.dest_logical = APIC_DEST_LOGICAL,
.check_apicid_used = NULL,
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -160,7 +160,6 @@ static struct apic xen_pv_apic = {
/* .irq_delivery_mode - used in native_compose_msi_msg only */
/* .irq_dest_mode - used in native_compose_msi_msg only */

- .target_cpus = default_target_cpus,
.disable_esr = 0,
/* .dest_logical - default_send_IPI_ use it but we use our own. */
.check_apicid_used = default_check_apicid_used, /* Used on 32-bit */