[tip:x86/urgent] x86/apic: Add separate apic_id_valid() functions for selected apic drivers

From: tip-bot for Steffen Persvold
Date: Fri Mar 23 2012 - 15:46:09 EST

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Commit-ID: b7157acf429e6aef690646ba964b9ebd25049ec2
Gitweb: http://git.kernel.org/tip/b7157acf429e6aef690646ba964b9ebd25049ec2
Author: Steffen Persvold <sp@xxxxxxxxxxxxx>
AuthorDate: Fri, 16 Mar 2012 20:25:35 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 23 Mar 2012 13:28:43 +0100

x86/apic: Add separate apic_id_valid() functions for selected apic drivers

As suggested by Suresh Siddha and Yinghai Lu:

For x2apic pre-enabled systems, apic driver is set already early
through early_acpi_boot_init()/early_acpi_process_madt()/
acpi_parse_madt()/default_acpi_madt_oem_check() path so that
apic_id_valid() checking will be sufficient during MADT and SRAT
parsing.

For non-x2apic pre-enabled systems, all apic ids should be less
than 255.

This allows us to substitute the checks in
arch/x86/kernel/acpi/boot.c::acpi_parse_x2apic() and
arch/x86/mm/srat.c::acpi_numa_x2apic_affinity_init() with
apic->apic_id_valid().

In addition we can avoid feigning the x2apic cpu feature in the
NumaChip apic code.

The following apic drivers have separate apic_id_valid()
functions which will accept x2apic type IDs :

x2apic_phys
x2apic_cluster
x2apic_uv_x
apic_numachip

Signed-off-by: Steffen Persvold <sp@xxxxxxxxxxxxx>
Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Cc: Daniel J Blueman <daniel@xxxxxxxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Jack Steiner <steiner@xxxxxxx>
Link: http://lkml.kernel.org/r/1331925935-13372-1-git-send-email-sp@xxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/include/asm/apic.h | 2 +-
arch/x86/include/asm/x2apic.h | 5 +++++
arch/x86/kernel/acpi/boot.c | 2 +-
arch/x86/kernel/apic/apic_numachip.c | 3 +--
arch/x86/kernel/apic/x2apic_cluster.c | 2 +-
arch/x86/kernel/apic/x2apic_phys.c | 2 +-
arch/x86/kernel/apic/x2apic_uv_x.c | 7 ++++++-
arch/x86/mm/srat.c | 2 +-
8 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index a9371c9..d3eaac4 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -535,7 +535,7 @@ static inline unsigned int read_apic_id(void)

static inline int default_apic_id_valid(int apicid)
{
- return x2apic_mode || (apicid < 255);
+ return (apicid < 255);
}

extern void default_setup_apic_routing(void);
diff --git a/arch/x86/include/asm/x2apic.h b/arch/x86/include/asm/x2apic.h
index 6bf5b8e..92e54ab 100644
--- a/arch/x86/include/asm/x2apic.h
+++ b/arch/x86/include/asm/x2apic.h
@@ -18,6 +18,11 @@ static const struct cpumask *x2apic_target_cpus(void)
return cpu_online_mask;
}

+static int x2apic_apic_id_valid(int apicid)
+{
+ return 1;
+}
+
static int x2apic_apic_id_registered(void)
{
return 1;
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 406ed77..0f42c2f 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -239,7 +239,7 @@ acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
- if (!cpu_has_x2apic && (apic_id >= 0xff) && enabled)
+ if (!apic->apic_id_valid(apic_id) && enabled)
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
else
acpi_register_lapic(apic_id, enabled);
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index d9ea5f3..899803e 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -229,11 +229,10 @@ static int __init numachip_system_init(void)
}
early_initcall(numachip_system_init);

-static int __cpuinit numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
if (!strncmp(oem_id, "NUMASC", 6)) {
numachip_system = 1;
- setup_force_cpu_cap(X86_FEATURE_X2APIC);
return 1;
}

diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 9193713..48f3103 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -213,7 +213,7 @@ static struct apic apic_x2apic_cluster = {
.name = "cluster x2apic",
.probe = x2apic_cluster_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,

.irq_delivery_mode = dest_LowestPrio,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index bcd1db6..8a778db 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -119,7 +119,7 @@ static struct apic apic_x2apic_phys = {
.name = "physical x2apic",
.probe = x2apic_phys_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,

.irq_delivery_mode = dest_Fixed,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index fc47714..87bfa69 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -266,6 +266,11 @@ static void uv_send_IPI_all(int vector)
uv_send_IPI_mask(cpu_online_mask, vector);
}

+static int uv_apic_id_valid(int apicid)
+{
+ return 1;
+}
+
static int uv_apic_id_registered(void)
{
return 1;
@@ -351,7 +356,7 @@ static struct apic __refdata apic_x2apic_uv_x = {
.name = "UV large system",
.probe = uv_probe,
.acpi_madt_oem_check = uv_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = uv_apic_id_valid,
.apic_id_registered = uv_apic_id_registered,

.irq_delivery_mode = dest_Fixed,
diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index 1c1c4f4..efb5b4b 100644
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -70,7 +70,7 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
return;
pxm = pa->proximity_domain;
apic_id = pa->apic_id;
- if (!cpu_has_x2apic && (apic_id >= 0xff)) {
+ if (!apic->apic_id_valid(apic_id)) {
printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
pxm, apic_id);
return;
--
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Next message: David Miller: "Re: GFS2: Pre-pull patch posting (merge window)"
Previous message: tip-bot for Raghavendra K T: "[tip:x86/urgent] locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage"
In reply to: Ingo Molnar: "Re: [PATCH REPOST] Added separate apic_id_valid() functions forselected apic drivers."
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