path: root/arch/x86/include/asm/apic.h
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-13 18:23:32 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-13 18:23:32 -0600
commit81c02a21b293faecab725f691d709111831e1944 (patch)
tree146d41d8ff3ad03dca611b8fa8ab03c46c5d8978 /arch/x86/include/asm/apic.h
parentd27c0d90184a13e9e9f28c38e84f889a259f6b5f (diff)
parent3eec595235c17a74094daa1e02d1b0af2e9a7125 (diff)
Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/apic updates from Thomas Gleixner: "This is a major overhaul to the x86 apic subsystem consisting of the following parts: - Remove obsolete APIC driver abstractions (David Rientjes) - Use the irqdomain facilities to dynamically allocate IRQs for IOAPICs. This is a prerequisite to enable IOAPIC hotplug support, and it also frees up wasted vectors (Jiang Liu) - Misc fixlets. Despite the hickup in Ingos previous pull request - caused by the missing fixup for the suspend/resume issue reported by Borislav - I strongly recommend that this update finds its way into 3.17. Some history for you: This is preparatory work for physical IOAPIC hotplug. The first attempt to support this was done by Yinghai and I shot it down because it just added another layer of obscurity and complexity to the already existing mess without tackling the underlying shortcomings of the current implementation. After quite some on- and offlist discussions, I requested that the design of this functionality must use generic infrastructure, i.e. irq domains, which provide all the mechanisms to dynamically map linux interrupt numbers to physical interrupts. Jiang picked up the idea and did a great job of consolidating the existing interfaces to manage the x86 (IOAPIC) interrupt system by utilizing irq domains. The testing in tip, Linux-next and inside of Intel on various machines did not unearth any oddities until Borislav exposed it to one of his oddball machines. The issue was resolved quickly, but unfortunately the fix fell through the cracks and did not hit the tip tree before Ingo sent the pull request. Not entirely Ingos fault, I also assumed that the fix was already merged when Ingo asked me whether he could send it. Nevertheless this work has a proper design, has undergone several rounds of review and the final fallout after applying it to tip and integrating it into Linux-next has been more than moderate. It's the ground work not only for IOAPIC hotplug, it will also allow us to move the lowlevel vector allocation into the irqdomain hierarchy, which will benefit other architectures as well. Patches are posted already, but they are on hold for two weeks, see below. I really appreciate the competence and responsiveness Jiang has shown in course of this endavour. So I'm sure that any fallout of this will be addressed in a timely manner. FYI, I'm vanishing for 2 weeks into my annual kids summer camp kitchen duty^Wvacation, while you folks are drooling at KS/LinuxCon :) But HPA will have a look at the hopefully zero fallout until I'm back" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits) x86, irq, PCI: Keep IRQ assignment for PCI devices during suspend/hibernation x86/apic/vsmp: Make is_vsmp_box() static x86, apic: Remove enable_apic_mode callback x86, apic: Remove setup_portio_remap callback x86, apic: Remove multi_timer_check callback x86, apic: Replace noop_check_apicid_used x86, apic: Remove check_apicid_present callback x86, apic: Remove mps_oem_check callback x86, apic: Remove smp_callin_clear_local_apic callback x86, apic: Replace trampoline physical addresses with defaults x86, apic: Remove x86_32_numa_cpu_node callback x86: intel-mid: Use the new io_apic interfaces x86, vsmp: Remove is_vsmp_box() from apic_is_clustered_box() x86, irq: Clean up irqdomain transition code x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled x86, irq, SFI: Release IOAPIC pin when PCI device is disabled x86, irq, mpparse: Release IOAPIC pin when PCI device is disabled x86, irq, ACPI: Release IOAPIC pin when PCI device is disabled x86, irq: Introduce helper functions to release IOAPIC pin x86, irq: Simplify the way to handle ISA IRQ ...
Diffstat (limited to 'arch/x86/include/asm/apic.h')
1 files changed, 5 insertions, 41 deletions
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 79752f2bdec..465b309af25 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -85,14 +85,6 @@ static inline bool apic_from_smp_config(void)
#include <asm/paravirt.h>
-#ifdef CONFIG_X86_64
-extern int is_vsmp_box(void);
-static inline int is_vsmp_box(void)
- return 0;
extern int setup_profiling_timer(unsigned int);
static inline void native_apic_mem_write(u32 reg, u32 v)
@@ -300,7 +292,6 @@ struct apic {
int dest_logical;
unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
- unsigned long (*check_apicid_present)(int apicid);
void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
const struct cpumask *mask);
@@ -309,21 +300,11 @@ struct apic {
void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
void (*setup_apic_routing)(void);
- int (*multi_timer_check)(int apic, int irq);
int (*cpu_present_to_apicid)(int mps_cpu);
void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
- void (*setup_portio_remap)(void);
int (*check_phys_apicid_present)(int phys_apicid);
- void (*enable_apic_mode)(void);
int (*phys_pkg_id)(int cpuid_apic, int index_msb);
- /*
- * When one of the next two hooks returns 1 the apic
- * is switched to this. Essentially they are additional
- * probe functions:
- */
- int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
unsigned int (*get_apic_id)(unsigned long x);
unsigned long (*set_apic_id)(unsigned int id);
unsigned long apic_id_mask;
@@ -343,11 +324,7 @@ struct apic {
/* wakeup_secondary_cpu */
int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
- int trampoline_phys_low;
- int trampoline_phys_high;
bool wait_for_init_deassert;
- void (*smp_callin_clear_local_apic)(void);
void (*inquire_remote_apic)(int apicid);
/* apic ops */
@@ -378,14 +355,6 @@ struct apic {
* won't be applied properly during early boot in this case.
int (*x86_32_early_logical_apicid)(int cpu);
- /*
- * Optional method called from setup_local_APIC() after logical
- * apicid is guaranteed to be known to initialize apicid -> node
- * mapping if NUMA initialization hasn't done so already. Don't
- * add new users.
- */
- int (*x86_32_numa_cpu_node)(int cpu);
@@ -496,14 +465,12 @@ static inline unsigned default_get_apic_id(unsigned long x)
- * Warm reset vector default position:
+ * Warm reset vector position:
+#define TRAMPOLINE_PHYS_LOW 0x467
#ifdef CONFIG_X86_64
-extern int default_acpi_madt_oem_check(char *, char *);
extern void apic_send_IPI_self(int vector);
DECLARE_PER_CPU(int, x2apic_extra_bits);
@@ -552,6 +519,8 @@ static inline int default_apic_id_valid(int apicid)
return (apicid < 255);
+extern int default_acpi_madt_oem_check(char *, char *);
extern void default_setup_apic_routing(void);
extern struct apic apic_noop;
@@ -635,11 +604,6 @@ static inline unsigned long default_check_apicid_used(physid_mask_t *map, int ap
return physid_isset(apicid, *map);
-static inline unsigned long default_check_apicid_present(int bit)
- return physid_isset(bit, phys_cpu_present_map);
static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
*retmap = *phys_map;