Re: [PATCH] Revert "Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip"

Rodrigo Vivi
2017-11-30T00:07:23Z

On Wed, Nov 29, 2017 at 11:37:11PM +0000, Rodrigo Vivi wrote:
>
> What's the issue here?

nevermind... I found the info I was looking for here:

https://bugs.freedesktop.org/show_bug.cgi?id=103712

;)

>
> On Wed, Nov 29, 2017 at 08:05:43AM +0000, Maarten Lankhorst wrote:
> > ---
> > arch/x86/Kconfig | 2 -
> > arch/x86/include/asm/apic.h | 270 +++++---
> > arch/x86/include/asm/desc.h | 2 +-
> > arch/x86/include/asm/hw_irq.h | 6 +-
> > arch/x86/include/asm/io_apic.h | 2 +
> > arch/x86/include/asm/irq.h | 4 +
> > arch/x86/include/asm/irq_vectors.h | 8 +-
> > arch/x86/include/asm/irqdomain.h | 1 -
> > arch/x86/include/asm/kvm_host.h | 2 +-
> > arch/x86/include/asm/trace/irq_vectors.h | 248 -------
> > arch/x86/include/asm/x2apic.h | 50 ++
> > arch/x86/include/asm/x86_init.h | 2 -
> > arch/x86/kernel/apic/Makefile | 2 +-
> > arch/x86/kernel/apic/apic.c | 239 ++++---
> > arch/x86/kernel/apic/apic_common.c | 46 --
> > arch/x86/kernel/apic/apic_flat_64.c | 10 +-
> > arch/x86/kernel/apic/apic_noop.c | 25 +-
> > arch/x86/kernel/apic/apic_numachip.c | 12 +-
> > arch/x86/kernel/apic/bigsmp_32.c | 8 +-
> > arch/x86/kernel/apic/io_apic.c | 130 ++--
> > arch/x86/kernel/apic/probe_32.c | 29 +-
> > arch/x86/kernel/apic/vector.c | 1099 ++++++++++++------------------
> > arch/x86/kernel/apic/x2apic.h | 9 -
> > arch/x86/kernel/apic/x2apic_cluster.c | 196 ++++--
> > arch/x86/kernel/apic/x2apic_phys.c | 44 +-
> > arch/x86/kernel/apic/x2apic_uv_x.c | 17 +-
> > arch/x86/kernel/i8259.c | 1 -
> > arch/x86/kernel/idt.c | 12 +-
> > arch/x86/kernel/irq.c | 101 ++-
> > arch/x86/kernel/irqinit.c | 4 +-
> > arch/x86/kernel/setup.c | 12 +
> > arch/x86/kernel/smpboot.c | 99 ++-
> > arch/x86/kernel/time.c | 5 -
> > arch/x86/kernel/traps.c | 2 +-
> > arch/x86/kernel/vsmp_64.c | 19 +
> > arch/x86/kernel/x86_init.c | 1 -
> > arch/x86/xen/apic.c | 6 +-
> > arch/x86/xen/enlighten_pv.c | 1 -
> > drivers/iommu/amd_iommu.c | 39 +-
> > drivers/iommu/intel_irq_remapping.c | 38 +-
> > drivers/pci/msi.c | 2 -
> > init/main.c | 2 +-
> > kernel/irq/Kconfig | 3 -
> > 43 files changed, 1317 insertions(+), 1493 deletions(-)
> > create mode 100644 arch/x86/include/asm/x2apic.h
> > delete mode 100644 arch/x86/kernel/apic/apic_common.c
> > delete mode 100644 arch/x86/kernel/apic/x2apic.h
> >
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index 8eed3f94bfc7..1a060afd9913 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -93,10 +93,8 @@ config X86
> > select GENERIC_FIND_FIRST_BIT
> > select GENERIC_IOMAP
> > select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP
> > - select GENERIC_IRQ_MATRIX_ALLOCATOR if X86_LOCAL_APIC
> > select GENERIC_IRQ_MIGRATION if SMP
> > select GENERIC_IRQ_PROBE
> > - select GENERIC_IRQ_RESERVATION_MODE
> > select GENERIC_IRQ_SHOW
> > select GENERIC_PENDING_IRQ if SMP
> > select GENERIC_SMP_IDLE_THREAD
> > diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
> > index a9e57f08bfa6..5f01671c68f2 100644
> > --- a/arch/x86/include/asm/apic.h
> > +++ b/arch/x86/include/asm/apic.h
> > @@ -53,15 +53,6 @@ extern int local_apic_timer_c2_ok;
> > extern int disable_apic;
> > extern unsigned int lapic_timer_frequency;
> >
> > -extern enum apic_intr_mode_id apic_intr_mode;
> > -enum apic_intr_mode_id {
> > - APIC_PIC,
> > - APIC_VIRTUAL_WIRE,
> > - APIC_VIRTUAL_WIRE_NO_CONFIG,
> > - APIC_SYMMETRIC_IO,
> > - APIC_SYMMETRIC_IO_NO_ROUTING
> > -};
> > -
> > #ifdef CONFIG_SMP
> > extern void __inquire_remote_apic(int apicid);
> > #else /* CONFIG_SMP */
> > @@ -136,13 +127,14 @@ extern void disconnect_bsp_APIC(int virt_wire_setup);
> > extern void disable_local_APIC(void);
> > extern void lapic_shutdown(void);
> > extern void sync_Arb_IDs(void);
> > -extern void apic_intr_mode_init(void);
> > +extern void init_bsp_APIC(void);
> > extern void setup_local_APIC(void);
> > extern void init_apic_mappings(void);
> > void register_lapic_address(unsigned long address);
> > extern void setup_boot_APIC_clock(void);
> > extern void setup_secondary_APIC_clock(void);
> > extern void lapic_update_tsc_freq(void);
> > +extern int APIC_init_uniprocessor(void);
> >
> > #ifdef CONFIG_X86_64
> > static inline int apic_force_enable(unsigned long addr)
> > @@ -153,7 +145,7 @@ static inline int apic_force_enable(unsigned long addr)
> > extern int apic_force_enable(unsigned long addr);
> > #endif
> >
> > -extern void apic_bsp_setup(bool upmode);
> > +extern int apic_bsp_setup(bool upmode);
> > extern void apic_ap_setup(void);
> >
> > /*
> > @@ -169,10 +161,6 @@ static inline int apic_is_clustered_box(void)
> > #endif
> >
> > extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
> > -extern void lapic_assign_system_vectors(void);
> > -extern void lapic_assign_legacy_vector(unsigned int isairq, bool replace);
> > -extern void lapic_online(void);
> > -extern void lapic_offline(void);
> >
> > #else /* !CONFIG_X86_LOCAL_APIC */
> > static inline void lapic_shutdown(void) { }
> > @@ -182,9 +170,6 @@ static inline void disable_local_APIC(void) { }
> > # define setup_boot_APIC_clock x86_init_noop
> > # define setup_secondary_APIC_clock x86_init_noop
> > static inline void lapic_update_tsc_freq(void) { }
> > -static inline void apic_intr_mode_init(void) { }
> > -static inline void lapic_assign_system_vectors(void) { }
> > -static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
> > #endif /* !CONFIG_X86_LOCAL_APIC */
> >
> > #ifdef CONFIG_X86_X2APIC
> > @@ -280,63 +265,73 @@ struct irq_data;
> > * James Cleverdon.
> > */
> > struct apic {
> > - /* Hotpath functions first */
> > - void (*eoi_write)(u32 reg, u32 v);
> > - void (*native_eoi_write)(u32 reg, u32 v);
> > - void (*write)(u32 reg, u32 v);
> > - u32 (*read)(u32 reg);
> > -
> > - /* IPI related functions */
> > - void (*wait_icr_idle)(void);
> > - u32 (*safe_wait_icr_idle)(void);
> > -
> > - void (*send_IPI)(int cpu, int vector);
> > - void (*send_IPI_mask)(const struct cpumask *mask, int vector);
> > - void (*send_IPI_mask_allbutself)(const struct cpumask *msk, int vec);
> > - void (*send_IPI_allbutself)(int vector);
> > - void (*send_IPI_all)(int vector);
> > - void (*send_IPI_self)(int vector);
> > -
> > - /* dest_logical is used by the IPI functions */
> > - u32 dest_logical;
> > - u32 disable_esr;
> > - u32 irq_delivery_mode;
> > - u32 irq_dest_mode;
> > -
> > - /* Functions and data related to vector allocation */
> > - void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
> > - const struct cpumask *mask);
> > - int (*cpu_mask_to_apicid)(const struct cpumask *cpumask,
> > - struct irq_data *irqdata,
> > - unsigned int *apicid);
> > - u32 (*calc_dest_apicid)(unsigned int cpu);
> > -
> > - /* ICR related functions */
> > - u64 (*icr_read)(void);
> > - void (*icr_write)(u32 low, u32 high);
> > -
> > - /* Probe, setup and smpboot functions */
> > - int (*probe)(void);
> > - int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
> > - int (*apic_id_valid)(int apicid);
> > - int (*apic_id_registered)(void);
> > -
> > - bool (*check_apicid_used)(physid_mask_t *map, int apicid);
> > - void (*init_apic_ldr)(void);
> > - void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
> > - void (*setup_apic_routing)(void);
> > - int (*cpu_present_to_apicid)(int mps_cpu);
> > - void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
> > - int (*check_phys_apicid_present)(int phys_apicid);
> > - int (*phys_pkg_id)(int cpuid_apic, int index_msb);
> > -
> > - u32 (*get_apic_id)(unsigned long x);
> > - u32 (*set_apic_id)(unsigned int id);
> > + char *name;
> > +
> > + int (*probe)(void);
> > + int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
> > + int (*apic_id_valid)(int apicid);
> > + int (*apic_id_registered)(void);
> > +
> > + u32 irq_delivery_mode;
> > + u32 irq_dest_mode;
> > +
> > + const struct cpumask *(*target_cpus)(void);
> > +
> > + int disable_esr;
> > +
> > + int dest_logical;
> > + unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
> > +
> > + void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
> > + const struct cpumask *mask);
> > + void (*init_apic_ldr)(void);
> > +
> > + void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
> > +
> > + void (*setup_apic_routing)(void);
> > + int (*cpu_present_to_apicid)(int mps_cpu);
> > + void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
> > + int (*check_phys_apicid_present)(int phys_apicid);
> > + int (*phys_pkg_id)(int cpuid_apic, int index_msb);
> > +
> > + unsigned int (*get_apic_id)(unsigned long x);
> > + /* Can't be NULL on 64-bit */
> > + unsigned long (*set_apic_id)(unsigned int id);
> > +
> > + int (*cpu_mask_to_apicid)(const struct cpumask *cpumask,
> > + struct irq_data *irqdata,
> > + unsigned int *apicid);
> > +
> > + /* ipi */
> > + void (*send_IPI)(int cpu, int vector);
> > + void (*send_IPI_mask)(const struct cpumask *mask, int vector);
> > + void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
> > + int vector);
> > + void (*send_IPI_allbutself)(int vector);
> > + void (*send_IPI_all)(int vector);
> > + void (*send_IPI_self)(int vector);
> >
> > /* wakeup_secondary_cpu */
> > - int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
> > + int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
> >
> > - void (*inquire_remote_apic)(int apicid);
> > + void (*inquire_remote_apic)(int apicid);
> > +
> > + /* apic ops */
> > + u32 (*read)(u32 reg);
> > + void (*write)(u32 reg, u32 v);
> > + /*
> > + * ->eoi_write() has the same signature as ->write().
> > + *
> > + * Drivers can support both ->eoi_write() and ->write() by passing the same
> > + * callback value. Kernel can override ->eoi_write() and fall back
> > + * on write for EOI.
> > + */
> > + void (*eoi_write)(u32 reg, u32 v);
> > + void (*native_eoi_write)(u32 reg, u32 v);
> > + u64 (*icr_read)(void);
> > + void (*icr_write)(u32 low, u32 high);
> > + void (*wait_icr_idle)(void);
> > + u32 (*safe_wait_icr_idle)(void);
> >
> > #ifdef CONFIG_X86_32
> > /*
> > @@ -351,7 +346,6 @@ struct apic {
> > */
> > int (*x86_32_early_logical_apicid)(int cpu);
> > #endif
> > - char *name;
> > };
> >
> > /*
> > @@ -386,7 +380,6 @@ extern struct apic *__apicdrivers[], *__apicdrivers_end[];
> > */
> > #ifdef CONFIG_SMP
> > extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
> > -extern int lapic_can_unplug_cpu(void);
> > #endif
> >
> > #ifdef CONFIG_X86_LOCAL_APIC
> > @@ -470,33 +463,84 @@ static inline unsigned default_get_apic_id(unsigned long x)
> > extern void apic_send_IPI_self(int vector);
> >
> > DECLARE_PER_CPU(int, x2apic_extra_bits);
> > +
> > +extern int default_cpu_present_to_apicid(int mps_cpu);
> > +extern int default_check_phys_apicid_present(int phys_apicid);
> > #endif
> >
> > extern void generic_bigsmp_probe(void);
> >
> > +
> > #ifdef CONFIG_X86_LOCAL_APIC
> >
> > #include <asm/smp.h>
> >
> > #define APIC_DFR_VALUE (APIC_DFR_FLAT)
> >
> > +static inline const struct cpumask *default_target_cpus(void)
> > +{
> > +#ifdef CONFIG_SMP
> > + return cpu_online_mask;
> > +#else
> > + return cpumask_of(0);
> > +#endif
> > +}
> > +
> > +static inline const struct cpumask *online_target_cpus(void)
> > +{
> > + return cpu_online_mask;
> > +}
> > +
> > DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
> >
> > -extern struct apic apic_noop;
> >
> > static inline unsigned int read_apic_id(void)
> > {
> > - unsigned int reg = apic_read(APIC_ID);
> > + unsigned int reg;
> > +
> > + reg = apic_read(APIC_ID);
> >
> > return apic->get_apic_id(reg);
> > }
> >
> > -extern int default_apic_id_valid(int apicid);
> > +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 u32 apic_default_calc_apicid(unsigned int cpu);
> > -extern u32 apic_flat_calc_apicid(unsigned int cpu);
> > +extern struct apic apic_noop;
> > +
> > +#ifdef CONFIG_X86_32
> > +
> > +static inline int noop_x86_32_early_logical_apicid(int cpu)
> > +{
> > + return BAD_APICID;
> > +}
> > +
> > +/*
> > + * Set up the logical destination ID.
> > + *
> > + * Intel recommends to set DFR, LDR and TPR before enabling
> > + * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
> > + * document number 292116). So here it goes...
> > + */
> > +extern void default_init_apic_ldr(void);
> > +
> > +static inline int default_apic_id_registered(void)
> > +{
> > + return physid_isset(read_apic_id(), phys_cpu_present_map);
> > +}
> > +
> > +static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
> > +{
> > + return cpuid_apic >> index_msb;
> > +}
> > +
> > +#endif
> >
> > extern int flat_cpu_mask_to_apicid(const struct cpumask *cpumask,
> > struct irq_data *irqdata,
> > @@ -504,17 +548,71 @@ extern int flat_cpu_mask_to_apicid(const struct cpumask *cpumask,
> > extern int default_cpu_mask_to_apicid(const struct cpumask *cpumask,
> > struct irq_data *irqdata,
> > unsigned int *apicid);
> > -extern bool default_check_apicid_used(physid_mask_t *map, int apicid);
> > -extern void flat_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > - const struct cpumask *mask);
> > -extern void default_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > - const struct cpumask *mask);
> > -extern void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap);
> > +
> > +static inline void
> > +flat_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > + const struct cpumask *mask)
> > +{
> > + /* Careful. Some cpus do not strictly honor the set of cpus
> > + * specified in the interrupt destination when using lowest
> > + * priority interrupt delivery mode.
> > + *
> > + * In particular there was a hyperthreading cpu observed to
> > + * deliver interrupts to the wrong hyperthread when only one
> > + * hyperthread was specified in the interrupt desitination.
> > + */
> > + cpumask_clear(retmask);
> > + cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
> > +}
> > +
> > +static inline void
> > +default_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > + const struct cpumask *mask)
> > +{
> > + cpumask_copy(retmask, cpumask_of(cpu));
> > +}
> > +
> > +static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid)
> > +{
> > + return physid_isset(apicid, *map);
> > +}
> > +
> > +static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
> > +{
> > + *retmap = *phys_map;
> > +}
> > +
> > +static inline int __default_cpu_present_to_apicid(int mps_cpu)
> > +{
> > + if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
> > + return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
> > + else
> > + return BAD_APICID;
> > +}
> > +
> > +static inline int
> > +__default_check_phys_apicid_present(int phys_apicid)
> > +{
> > + return physid_isset(phys_apicid, phys_cpu_present_map);
> > +}
> > +
> > +#ifdef CONFIG_X86_32
> > +static inline int default_cpu_present_to_apicid(int mps_cpu)
> > +{
> > + return __default_cpu_present_to_apicid(mps_cpu);
> > +}
> > +
> > +static inline int
> > +default_check_phys_apicid_present(int phys_apicid)
> > +{
> > + return __default_check_phys_apicid_present(phys_apicid);
> > +}
> > +#else
> > extern int default_cpu_present_to_apicid(int mps_cpu);
> > extern int default_check_phys_apicid_present(int phys_apicid);
> > +#endif
> >
> > #endif /* CONFIG_X86_LOCAL_APIC */
> > -
> > extern void irq_enter(void);
> > extern void irq_exit(void);
> >
> > diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
> > index 4011cb03ef08..0a3e808b9123 100644
> > --- a/arch/x86/include/asm/desc.h
> > +++ b/arch/x86/include/asm/desc.h
> > @@ -393,7 +393,7 @@ static inline void set_desc_limit(struct desc_struct *desc, unsigned long limit)
> > void update_intr_gate(unsigned int n, const void *addr);
> > void alloc_intr_gate(unsigned int n, const void *addr);
> >
> > -extern unsigned long system_vectors[];
> > +extern unsigned long used_vectors[];
> >
> > #ifdef CONFIG_X86_64
> > DECLARE_PER_CPU(u32, debug_idt_ctr);
> > diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
> > index 2851077b6051..16d48a18c069 100644
> > --- a/arch/x86/include/asm/hw_irq.h
> > +++ b/arch/x86/include/asm/hw_irq.h
> > @@ -16,8 +16,6 @@
> >
> > #include <asm/irq_vectors.h>
> >
> > -#define IRQ_MATRIX_BITS NR_VECTORS
> > -
> > #ifndef __ASSEMBLY__
> >
> > #include <linux/percpu.h>
> > @@ -117,13 +115,15 @@ struct irq_alloc_info {
> >
> > struct irq_cfg {
> > unsigned int dest_apicid;
> > - unsigned int vector;
> > + u8 vector;
> > + u8 old_vector;
> > };
> >
> > extern struct irq_cfg *irq_cfg(unsigned int irq);
> > extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
> > extern void lock_vector_lock(void);
> > extern void unlock_vector_lock(void);
> > +extern void setup_vector_irq(int cpu);
> > #ifdef CONFIG_SMP
> > extern void send_cleanup_vector(struct irq_cfg *);
> > extern void irq_complete_move(struct irq_cfg *cfg);
> > diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
> > index a8834dd546cd..5c27e146a166 100644
> > --- a/arch/x86/include/asm/io_apic.h
> > +++ b/arch/x86/include/asm/io_apic.h
> > @@ -193,6 +193,7 @@ static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
> > extern void setup_IO_APIC(void);
> > extern void enable_IO_APIC(void);
> > extern void disable_IO_APIC(void);
> > +extern void setup_ioapic_dest(void);
> > extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin);
> > extern void print_IO_APICs(void);
> > #else /* !CONFIG_X86_IO_APIC */
> > @@ -232,6 +233,7 @@ static inline void io_apic_init_mappings(void) { }
> >
> > static inline void setup_IO_APIC(void) { }
> > static inline void enable_IO_APIC(void) { }
> > +static inline void setup_ioapic_dest(void) { }
> >
> > #endif
> >
> > diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
> > index 2395bb794c7b..d8632f8fa17d 100644
> > --- a/arch/x86/include/asm/irq.h
> > +++ b/arch/x86/include/asm/irq.h
> > @@ -26,7 +26,11 @@ extern void irq_ctx_init(int cpu);
> >
> > struct irq_desc;
> >
> > +#ifdef CONFIG_HOTPLUG_CPU
> > +#include <linux/cpumask.h>
> > +extern int check_irq_vectors_for_cpu_disable(void);
> > extern void fixup_irqs(void);
> > +#endif
> >
> > #ifdef CONFIG_HAVE_KVM
> > extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void));
> > diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
> > index 67421f649cfa..c20ffca8fef1 100644
> > --- a/arch/x86/include/asm/irq_vectors.h
> > +++ b/arch/x86/include/asm/irq_vectors.h
> > @@ -102,8 +102,12 @@
> > #define POSTED_INTR_NESTED_VECTOR 0xf0
> > #endif
> >
> > -#define MANAGED_IRQ_SHUTDOWN_VECTOR 0xef
> > -#define LOCAL_TIMER_VECTOR 0xee
> > +/*
> > + * Local APIC timer IRQ vector is on a different priority level,
> > + * to work around the 'lost local interrupt if more than 2 IRQ
> > + * sources per level' errata.
> > + */
> > +#define LOCAL_TIMER_VECTOR 0xef
> >
> > #define NR_VECTORS 256
> >
> > diff --git a/arch/x86/include/asm/irqdomain.h b/arch/x86/include/asm/irqdomain.h
> > index 139feef467f7..4e5638539846 100644
> > --- a/arch/x86/include/asm/irqdomain.h
> > +++ b/arch/x86/include/asm/irqdomain.h
> > @@ -9,7 +9,6 @@
> > enum {
> > /* Allocate contiguous CPU vectors */
> > X86_IRQ_ALLOC_CONTIGUOUS_VECTORS = 0x1,
> > - X86_IRQ_ALLOC_LEGACY = 0x2,
> > };
> >
> > extern struct irq_domain *x86_vector_domain;
> > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> > index 1bfb99770c34..7233445a20bd 100644
> > --- a/arch/x86/include/asm/kvm_host.h
> > +++ b/arch/x86/include/asm/kvm_host.h
> > @@ -1424,7 +1424,7 @@ static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
> > static inline int kvm_cpu_get_apicid(int mps_cpu)
> > {
> > #ifdef CONFIG_X86_LOCAL_APIC
> > - return default_cpu_present_to_apicid(mps_cpu);
> > + return __default_cpu_present_to_apicid(mps_cpu);
> > #else
> > WARN_ON_ONCE(1);
> > return BAD_APICID;
> > diff --git a/arch/x86/include/asm/trace/irq_vectors.h b/arch/x86/include/asm/trace/irq_vectors.h
> > index 84b9ec0c1bc0..8eb139ed1a03 100644
> > --- a/arch/x86/include/asm/trace/irq_vectors.h
> > +++ b/arch/x86/include/asm/trace/irq_vectors.h
> > @@ -138,254 +138,6 @@ DEFINE_IRQ_VECTOR_EVENT(deferred_error_apic);
> > DEFINE_IRQ_VECTOR_EVENT(thermal_apic);
> > #endif
> >
> > -TRACE_EVENT(vector_config,
> > -
> > - TP_PROTO(unsigned int irq, unsigned int vector,
> > - unsigned int cpu, unsigned int apicdest),
> > -
> > - TP_ARGS(irq, vector, cpu, apicdest),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( unsigned int, vector )
> > - __field( unsigned int, cpu )
> > - __field( unsigned int, apicdest )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->vector = vector;
> > - __entry->cpu = cpu;
> > - __entry->apicdest = apicdest;
> > - ),
> > -
> > - TP_printk("irq=%u vector=%u cpu=%u apicdest=0x%08x",
> > - __entry->irq, __entry->vector, __entry->cpu,
> > - __entry->apicdest)
> > -);
> > -
> > -DECLARE_EVENT_CLASS(vector_mod,
> > -
> > - TP_PROTO(unsigned int irq, unsigned int vector,
> > - unsigned int cpu, unsigned int prev_vector,
> > - unsigned int prev_cpu),
> > -
> > - TP_ARGS(irq, vector, cpu, prev_vector, prev_cpu),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( unsigned int, vector )
> > - __field( unsigned int, cpu )
> > - __field( unsigned int, prev_vector )
> > - __field( unsigned int, prev_cpu )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->vector = vector;
> > - __entry->cpu = cpu;
> > - __entry->prev_vector = prev_vector;
> > - __entry->prev_cpu = prev_cpu;
> > -
> > - ),
> > -
> > - TP_printk("irq=%u vector=%u cpu=%u prev_vector=%u prev_cpu=%u",
> > - __entry->irq, __entry->vector, __entry->cpu,
> > - __entry->prev_vector, __entry->prev_cpu)
> > -);
> > -
> > -#define DEFINE_IRQ_VECTOR_MOD_EVENT(name) \
> > -DEFINE_EVENT_FN(vector_mod, name, \
> > - TP_PROTO(unsigned int irq, unsigned int vector, \
> > - unsigned int cpu, unsigned int prev_vector, \
> > - unsigned int prev_cpu), \
> > - TP_ARGS(irq, vector, cpu, prev_vector, prev_cpu), NULL, NULL); \
> > -
> > -DEFINE_IRQ_VECTOR_MOD_EVENT(vector_update);
> > -DEFINE_IRQ_VECTOR_MOD_EVENT(vector_clear);
> > -
> > -DECLARE_EVENT_CLASS(vector_reserve,
> > -
> > - TP_PROTO(unsigned int irq, int ret),
> > -
> > - TP_ARGS(irq, ret),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( int, ret )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->ret = ret;
> > - ),
> > -
> > - TP_printk("irq=%u ret=%d", __entry->irq, __entry->ret)
> > -);
> > -
> > -#define DEFINE_IRQ_VECTOR_RESERVE_EVENT(name) \
> > -DEFINE_EVENT_FN(vector_reserve, name, \
> > - TP_PROTO(unsigned int irq, int ret), \
> > - TP_ARGS(irq, ret), NULL, NULL); \
> > -
> > -DEFINE_IRQ_VECTOR_RESERVE_EVENT(vector_reserve_managed);
> > -DEFINE_IRQ_VECTOR_RESERVE_EVENT(vector_reserve);
> > -
> > -TRACE_EVENT(vector_alloc,
> > -
> > - TP_PROTO(unsigned int irq, unsigned int vector, bool reserved,
> > - int ret),
> > -
> > - TP_ARGS(irq, vector, ret, reserved),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( unsigned int, vector )
> > - __field( bool, reserved )
> > - __field( int, ret )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->vector = ret < 0 ? 0 : vector;
> > - __entry->reserved = reserved;
> > - __entry->ret = ret > 0 ? 0 : ret;
> > - ),
> > -
> > - TP_printk("irq=%u vector=%u reserved=%d ret=%d",
> > - __entry->irq, __entry->vector,
> > - __entry->reserved, __entry->ret)
> > -);
> > -
> > -TRACE_EVENT(vector_alloc_managed,
> > -
> > - TP_PROTO(unsigned int irq, unsigned int vector,
> > - int ret),
> > -
> > - TP_ARGS(irq, vector, ret),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( unsigned int, vector )
> > - __field( int, ret )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->vector = ret < 0 ? 0 : vector;
> > - __entry->ret = ret > 0 ? 0 : ret;
> > - ),
> > -
> > - TP_printk("irq=%u vector=%u ret=%d",
> > - __entry->irq, __entry->vector, __entry->ret)
> > -);
> > -
> > -DECLARE_EVENT_CLASS(vector_activate,
> > -
> > - TP_PROTO(unsigned int irq, bool is_managed, bool can_reserve,
> > - bool early),
> > -
> > - TP_ARGS(irq, is_managed, can_reserve, early),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( bool, is_managed )
> > - __field( bool, can_reserve )
> > - __field( bool, early )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->is_managed = is_managed;
> > - __entry->can_reserve = can_reserve;
> > - __entry->early = early;
> > - ),
> > -
> > - TP_printk("irq=%u is_managed=%d can_reserve=%d early=%d",
> > - __entry->irq, __entry->is_managed, __entry->can_reserve,
> > - __entry->early)
> > -);
> > -
> > -#define DEFINE_IRQ_VECTOR_ACTIVATE_EVENT(name) \
> > -DEFINE_EVENT_FN(vector_activate, name, \
> > - TP_PROTO(unsigned int irq, bool is_managed, \
> > - bool can_reserve, bool early), \
> > - TP_ARGS(irq, is_managed, can_reserve, early), NULL, NULL); \
> > -
> > -DEFINE_IRQ_VECTOR_ACTIVATE_EVENT(vector_activate);
> > -DEFINE_IRQ_VECTOR_ACTIVATE_EVENT(vector_deactivate);
> > -
> > -TRACE_EVENT(vector_teardown,
> > -
> > - TP_PROTO(unsigned int irq, bool is_managed, bool has_reserved),
> > -
> > - TP_ARGS(irq, is_managed, has_reserved),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( bool, is_managed )
> > - __field( bool, has_reserved )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->is_managed = is_managed;
> > - __entry->has_reserved = has_reserved;
> > - ),
> > -
> > - TP_printk("irq=%u is_managed=%d has_reserved=%d",
> > - __entry->irq, __entry->is_managed, __entry->has_reserved)
> > -);
> > -
> > -TRACE_EVENT(vector_setup,
> > -
> > - TP_PROTO(unsigned int irq, bool is_legacy, int ret),
> > -
> > - TP_ARGS(irq, is_legacy, ret),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( bool, is_legacy )
> > - __field( int, ret )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->is_legacy = is_legacy;
> > - __entry->ret = ret;
> > - ),
> > -
> > - TP_printk("irq=%u is_legacy=%d ret=%d",
> > - __entry->irq, __entry->is_legacy, __entry->ret)
> > -);
> > -
> > -TRACE_EVENT(vector_free_moved,
> > -
> > - TP_PROTO(unsigned int irq, unsigned int cpu, unsigned int vector,
> > - bool is_managed),
> > -
> > - TP_ARGS(irq, cpu, vector, is_managed),
> > -
> > - TP_STRUCT__entry(
> > - __field( unsigned int, irq )
> > - __field( unsigned int, cpu )
> > - __field( unsigned int, vector )
> > - __field( bool, is_managed )
> > - ),
> > -
> > - TP_fast_assign(
> > - __entry->irq = irq;
> > - __entry->cpu = cpu;
> > - __entry->vector = vector;
> > - __entry->is_managed = is_managed;
> > - ),
> > -
> > - TP_printk("irq=%u cpu=%u vector=%u is_managed=%d",
> > - __entry->irq, __entry->cpu, __entry->vector,
> > - __entry->is_managed)
> > -);
> > -
> > -
> > #endif /* CONFIG_X86_LOCAL_APIC */
> >
> > #undef TRACE_INCLUDE_PATH
> > diff --git a/arch/x86/include/asm/x2apic.h b/arch/x86/include/asm/x2apic.h
> > new file mode 100644
> > index 000000000000..78ccf28d17db
> > --- /dev/null
> > +++ b/arch/x86/include/asm/x2apic.h
> > @@ -0,0 +1,50 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Common bits for X2APIC cluster/physical modes.
> > + */
> > +
> > +#ifndef _ASM_X86_X2APIC_H
> > +#define _ASM_X86_X2APIC_H
> > +
> > +#include <asm/apic.h>
> > +#include <asm/ipi.h>
> > +#include <linux/cpumask.h>
> > +
> > +static int x2apic_apic_id_valid(int apicid)
> > +{
> > + return 1;
> > +}
> > +
> > +static int x2apic_apic_id_registered(void)
> > +{
> > + return 1;
> > +}
> > +
> > +static void
> > +__x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
> > +{
> > + unsigned long cfg = __prepare_ICR(0, vector, dest);
> > + native_x2apic_icr_write(cfg, apicid);
> > +}
> > +
> > +static unsigned int x2apic_get_apic_id(unsigned long id)
> > +{
> > + return id;
> > +}
> > +
> > +static unsigned long x2apic_set_apic_id(unsigned int id)
> > +{
> > + return id;
> > +}
> > +
> > +static int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
> > +{
> > + return initial_apicid >> index_msb;
> > +}
> > +
> > +static void x2apic_send_IPI_self(int vector)
> > +{
> > + apic_write(APIC_SELF_IPI, vector);
> > +}
> > +
> > +#endif /* _ASM_X86_X2APIC_H */
> > diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
> > index aa4747569e23..5dd011a8b560 100644
> > --- a/arch/x86/include/asm/x86_init.h
> > +++ b/arch/x86/include/asm/x86_init.h
> > @@ -51,13 +51,11 @@ struct x86_init_resources {
> > * are set up.
> > * @intr_init: interrupt init code
> > * @trap_init: platform specific trap setup
> > - * @intr_mode_init: interrupt delivery mode setup
> > */
> > struct x86_init_irqs {
> > void (*pre_vector_init)(void);
> > void (*intr_init)(void);
> > void (*trap_init)(void);
> > - void (*intr_mode_init)(void);
> > };
> >
> > /**
> > diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
> > index a6fcaf16cdbf..e59e341f9921 100644
> > --- a/arch/x86/kernel/apic/Makefile
> > +++ b/arch/x86/kernel/apic/Makefile
> > @@ -7,7 +7,7 @@
> > # In particualr, smp_apic_timer_interrupt() is called in random places.
> > KCOV_INSTRUMENT := n
> >
> > -obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_common.o apic_noop.o ipi.o vector.o
> > +obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o vector.o
> > obj-y += hw_nmi.o
> >
> > obj-$(CONFIG_X86_IO_APIC) += io_apic.o
> > diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
> > index 6e272f3ea984..f72ecd5c39a7 100644
> > --- a/arch/x86/kernel/apic/apic.c
> > +++ b/arch/x86/kernel/apic/apic.c
> > @@ -211,7 +211,11 @@ static inline int lapic_get_version(void)
> > */
> > static inline int lapic_is_integrated(void)
> > {
> > +#ifdef CONFIG_X86_64
> > + return 1;
> > +#else
> > return APIC_INTEGRATED(lapic_get_version());
> > +#endif
> > }
> >
> > /*
> > @@ -294,11 +298,14 @@ int get_physical_broadcast(void)
> > */
> > int lapic_get_maxlvt(void)
> > {
> > + unsigned int v;
> > +
> > + v = apic_read(APIC_LVR);
> > /*
> > * - we always have APIC integrated on 64bit mode
> > * - 82489DXs do not report # of LVT entries
> > */
> > - return lapic_is_integrated() ? GET_APIC_MAXLVT(apic_read(APIC_LVR)) : 2;
> > + return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
> > }
> >
> > /*
> > @@ -1222,100 +1229,53 @@ void __init sync_Arb_IDs(void)
> > APIC_INT_LEVELTRIG | APIC_DM_INIT);
> > }
> >
> > -enum apic_intr_mode_id apic_intr_mode;
> > -
> > -static int __init apic_intr_mode_select(void)
> > +/*
> > + * An initial setup of the virtual wire mode.
> > + */
> > +void __init init_bsp_APIC(void)
> > {
> > - /* Check kernel option */
> > - if (disable_apic) {
> > - pr_info("APIC disabled via kernel command line\n");
> > - return APIC_PIC;
> > - }
> > -
> > - /* Check BIOS */
> > -#ifdef CONFIG_X86_64
> > - /* On 64-bit, the APIC must be integrated, Check local APIC only */
> > - if (!boot_cpu_has(X86_FEATURE_APIC)) {
> > - disable_apic = 1;
> > - pr_info("APIC disabled by BIOS\n");
> > - return APIC_PIC;
> > - }
> > -#else
> > - /* On 32-bit, the APIC may be integrated APIC or 82489DX */
> > -
> > - /* Neither 82489DX nor integrated APIC ? */
> > - if (!boot_cpu_has(X86_FEATURE_APIC) && !smp_found_config) {
> > - disable_apic = 1;
> > - return APIC_PIC;
> > - }
> > + unsigned int value;
> >
> > - /* If the BIOS pretends there is an integrated APIC ? */
> > - if (!boot_cpu_has(X86_FEATURE_APIC) &&
> > - APIC_INTEGRATED(boot_cpu_apic_version)) {
> > - disable_apic = 1;
> > - pr_err(FW_BUG "Local APIC %d not detected, force emulation\n",
> > - boot_cpu_physical_apicid);
> > - return APIC_PIC;
> > - }
> > -#endif
> > + /*
> > + * Don't do the setup now if we have a SMP BIOS as the
> > + * through-I/O-APIC virtual wire mode might be active.
> > + */
> > + if (smp_found_config || !boot_cpu_has(X86_FEATURE_APIC))
> > + return;
> >
> > - /* Check MP table or ACPI MADT configuration */
> > - if (!smp_found_config) {
> > - disable_ioapic_support();
> > - if (!acpi_lapic) {
> > - pr_info("APIC: ACPI MADT or MP tables are not detected\n");
> > - return APIC_VIRTUAL_WIRE_NO_CONFIG;
> > - }
> > - return APIC_VIRTUAL_WIRE;
> > - }
> > + /*
> > + * Do not trust the local APIC being empty at bootup.
> > + */
> > + clear_local_APIC();
> >
> > -#ifdef CONFIG_SMP
> > - /* If SMP should be disabled, then really disable it! */
> > - if (!setup_max_cpus) {
> > - pr_info("APIC: SMP mode deactivated\n");
> > - return APIC_SYMMETRIC_IO_NO_ROUTING;
> > - }
> > + /*
> > + * Enable APIC.
> > + */
> > + value = apic_read(APIC_SPIV);
> > + value &= ~APIC_VECTOR_MASK;
> > + value |= APIC_SPIV_APIC_ENABLED;
> >
> > - if (read_apic_id() != boot_cpu_physical_apicid) {
> > - panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
> > - read_apic_id(), boot_cpu_physical_apicid);
> > - /* Or can we switch back to PIC here? */
> > - }
> > +#ifdef CONFIG_X86_32
> > + /* This bit is reserved on P4/Xeon and should be cleared */
> > + if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
> > + (boot_cpu_data.x86 == 15))
> > + value &= ~APIC_SPIV_FOCUS_DISABLED;
> > + else
> > #endif
> > + value |= APIC_SPIV_FOCUS_DISABLED;
> > + value |= SPURIOUS_APIC_VECTOR;
> > + apic_write(APIC_SPIV, value);
> >
> > - return APIC_SYMMETRIC_IO;
> > -}
> > -
> > -/* Init the interrupt delivery mode for the BSP */
> > -void __init apic_intr_mode_init(void)
> > -{
> > - bool upmode = IS_ENABLED(CONFIG_UP_LATE_INIT);
> > -
> > - apic_intr_mode = apic_intr_mode_select();
> > -
> > - switch (apic_intr_mode) {
> > - case APIC_PIC:
> > - pr_info("APIC: Keep in PIC mode(8259)\n");
> > - return;
> > - case APIC_VIRTUAL_WIRE:
> > - pr_info("APIC: Switch to virtual wire mode setup\n");
> > - default_setup_apic_routing();
> > - break;
> > - case APIC_VIRTUAL_WIRE_NO_CONFIG:
> > - pr_info("APIC: Switch to virtual wire mode setup with no configuration\n");
> > - upmode = true;
> > - default_setup_apic_routing();
> > - break;
> > - case APIC_SYMMETRIC_IO:
> > - pr_info("APIC: Switch to symmetric I/O mode setup\n");
> > - default_setup_apic_routing();
> > - break;
> > - case APIC_SYMMETRIC_IO_NO_ROUTING:
> > - pr_info("APIC: Switch to symmetric I/O mode setup in no SMP routine\n");
> > - break;
> > - }
> > -
> > - apic_bsp_setup(upmode);
> > + /*
> > + * Set up the virtual wire mode.
> > + */
> > + apic_write(APIC_LVT0, APIC_DM_EXTINT);
> > + value = APIC_DM_NMI;
> > + if (!lapic_is_integrated()) /* 82489DX */
> > + value |= APIC_LVT_LEVEL_TRIGGER;
> > + if (apic_extnmi == APIC_EXTNMI_NONE)
> > + value |= APIC_LVT_MASKED;
> > + apic_write(APIC_LVT1, value);
> > }
> >
> > static void lapic_setup_esr(void)
> > @@ -1539,9 +1499,7 @@ void setup_local_APIC(void)
> > value = APIC_DM_NMI;
> > else
> > value = APIC_DM_NMI | APIC_LVT_MASKED;
> > -
> > - /* Is 82489DX ? */
> > - if (!lapic_is_integrated())
> > + if (!lapic_is_integrated()) /* 82489DX */
> > value |= APIC_LVT_LEVEL_TRIGGER;
> > apic_write(APIC_LVT1, value);
> >
> > @@ -1927,8 +1885,8 @@ void __init init_apic_mappings(void)
> > * yeah -- we lie about apic_version
> > * in case if apic was disabled via boot option
> > * but it's not a problem for SMP compiled kernel
> > - * since apic_intr_mode_select is prepared for such
> > - * a case and disable smp mode
> > + * since smp_sanity_check is prepared for such a case
> > + * and disable smp mode
> > */
> > boot_cpu_apic_version = GET_APIC_VERSION(apic_read(APIC_LVR));
> > }
> > @@ -2284,6 +2242,44 @@ int hard_smp_processor_id(void)
> > return read_apic_id();
> > }
> >
> > +void default_init_apic_ldr(void)
> > +{
> > + unsigned long val;
> > +
> > + apic_write(APIC_DFR, APIC_DFR_VALUE);
> > + val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
> > + val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
> > + apic_write(APIC_LDR, val);
> > +}
> > +
> > +int default_cpu_mask_to_apicid(const struct cpumask *mask,
> > + struct irq_data *irqdata,
> > + unsigned int *apicid)
> > +{
> > + unsigned int cpu = cpumask_first(mask);
> > +
> > + if (cpu >= nr_cpu_ids)
> > + return -EINVAL;
> > + *apicid = per_cpu(x86_cpu_to_apicid, cpu);
> > + irq_data_update_effective_affinity(irqdata, cpumask_of(cpu));
> > + return 0;
> > +}
> > +
> > +int flat_cpu_mask_to_apicid(const struct cpumask *mask,
> > + struct irq_data *irqdata,
> > + unsigned int *apicid)
> > +
> > +{
> > + struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqdata);
> > + unsigned long cpu_mask = cpumask_bits(mask)[0] & APIC_ALL_CPUS;
> > +
> > + if (!cpu_mask)
> > + return -EINVAL;
> > + *apicid = (unsigned int)cpu_mask;
> > + cpumask_bits(effmsk)[0] = cpu_mask;
> > + return 0;
> > +}
> > +
> > /*
> > * Override the generic EOI implementation with an optimized version.
> > * Only called during early boot when only one CPU is active and with
> > @@ -2326,27 +2322,72 @@ static void __init apic_bsp_up_setup(void)
> > * Returns:
> > * apic_id of BSP APIC
> > */
> > -void __init apic_bsp_setup(bool upmode)
> > +int __init apic_bsp_setup(bool upmode)
> > {
> > + int id;
> > +
> > connect_bsp_APIC();
> > if (upmode)
> > apic_bsp_up_setup();
> > setup_local_APIC();
> >
> > + if (x2apic_mode)
> > + id = apic_read(APIC_LDR);
> > + else
> > + id = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
> > +
> > enable_IO_APIC();
> > end_local_APIC_setup();
> > irq_remap_enable_fault_handling();
> > setup_IO_APIC();
> > + /* Setup local timer */
> > + x86_init.timers.setup_percpu_clockev();
> > + return id;
> > +}
> > +
> > +/*
> > + * This initializes the IO-APIC and APIC hardware if this is
> > + * a UP kernel.
> > + */
> > +int __init APIC_init_uniprocessor(void)
> > +{
> > + if (disable_apic) {
> > + pr_info("Apic disabled\n");
> > + return -1;
> > + }
> > +#ifdef CONFIG_X86_64
> > + if (!boot_cpu_has(X86_FEATURE_APIC)) {
> > + disable_apic = 1;
> > + pr_info("Apic disabled by BIOS\n");
> > + return -1;
> > + }
> > +#else
> > + if (!smp_found_config && !boot_cpu_has(X86_FEATURE_APIC))
> > + return -1;
> > +
> > + /*
> > + * Complain if the BIOS pretends there is one.
> > + */
> > + if (!boot_cpu_has(X86_FEATURE_APIC) &&
> > + APIC_INTEGRATED(boot_cpu_apic_version)) {
> > + pr_err("BIOS bug, local APIC 0x%x not detected!...\n",
> > + boot_cpu_physical_apicid);
> > + return -1;
> > + }
> > +#endif
> > +
> > + if (!smp_found_config)
> > + disable_ioapic_support();
> > +
> > + default_setup_apic_routing();
> > + apic_bsp_setup(true);
> > + return 0;
> > }
> >
> > #ifdef CONFIG_UP_LATE_INIT
> > void __init up_late_init(void)
> > {
> > - if (apic_intr_mode == APIC_PIC)
> > - return;
> > -
> > - /* Setup local timer */
> > - x86_init.timers.setup_percpu_clockev();
> > + APIC_init_uniprocessor();
> > }
> > #endif
> >
> > diff --git a/arch/x86/kernel/apic/apic_common.c b/arch/x86/kernel/apic/apic_common.c
> > deleted file mode 100644
> > index a360801779ae..000000000000
> > --- a/arch/x86/kernel/apic/apic_common.c
> > +++ /dev/null
> > @@ -1,46 +0,0 @@
> > -/*
> > - * Common functions shared between the various APIC flavours
> > - *
> > - * SPDX-License-Identifier: GPL-2.0
> > - */
> > -#include <linux/irq.h>
> > -#include <asm/apic.h>
> > -
> > -u32 apic_default_calc_apicid(unsigned int cpu)
> > -{
> > - return per_cpu(x86_cpu_to_apicid, cpu);
> > -}
> > -
> > -u32 apic_flat_calc_apicid(unsigned int cpu)
> > -{
> > - return 1U << cpu;
> > -}
> > -
> > -bool default_check_apicid_used(physid_mask_t *map, int apicid)
> > -{
> > - return physid_isset(apicid, *map);
> > -}
> > -
> > -void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
> > -{
> > - *retmap = *phys_map;
> > -}
> > -
> > -int default_cpu_present_to_apicid(int mps_cpu)
> > -{
> > - if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
> > - return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
> > - else
> > - return BAD_APICID;
> > -}
> > -EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
> > -
> > -int default_check_phys_apicid_present(int phys_apicid)
> > -{
> > - return physid_isset(phys_apicid, phys_cpu_present_map);
> > -}
> > -
> > -int default_apic_id_valid(int apicid)
> > -{
> > - return (apicid < 255);
> > -}
> > diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
> > index aa85690e9b64..dedd5a41ba48 100644
> > --- a/arch/x86/kernel/apic/apic_flat_64.c
> > +++ b/arch/x86/kernel/apic/apic_flat_64.c
> > @@ -119,7 +119,7 @@ static unsigned int flat_get_apic_id(unsigned long x)
> > return (x >> 24) & 0xFF;
> > }
> >
> > -static u32 set_apic_id(unsigned int id)
> > +static unsigned long set_apic_id(unsigned int id)
> > {
> > return (id & 0xFF) << 24;
> > }
> > @@ -154,10 +154,12 @@ static struct apic apic_flat __ro_after_init = {
> > .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,
> >
> > + .vector_allocation_domain = flat_vector_allocation_domain,
> > .init_apic_ldr = flat_init_apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -170,7 +172,7 @@ static struct apic apic_flat __ro_after_init = {
> > .get_apic_id = flat_get_apic_id,
> > .set_apic_id = set_apic_id,
> >
> > - .calc_dest_apicid = apic_flat_calc_apicid,
> > + .cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
> >
> > .send_IPI = default_send_IPI_single,
> > .send_IPI_mask = flat_send_IPI_mask,
> > @@ -247,10 +249,12 @@ static struct apic apic_physflat __ro_after_init = {
> > .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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > /* not needed, but shouldn't hurt: */
> > .init_apic_ldr = flat_init_apic_ldr,
> >
> > @@ -264,7 +268,7 @@ static struct apic apic_physflat __ro_after_init = {
> > .get_apic_id = flat_get_apic_id,
> > .set_apic_id = set_apic_id,
> >
> > - .calc_dest_apicid = apic_default_calc_apicid,
> > + .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
> >
> > .send_IPI = default_send_IPI_single_phys,
> > .send_IPI_mask = default_send_IPI_mask_sequence_phys,
> > diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
> > index 7b659c4480c9..c8d211277315 100644
> > --- a/arch/x86/kernel/apic/apic_noop.c
> > +++ b/arch/x86/kernel/apic/apic_noop.c
> > @@ -84,6 +84,20 @@ 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)
> > +{
> > + if (cpu != 0)
> > + pr_warning("APIC: Vector allocated for non-BSP cpu\n");
> > + cpumask_copy(retmask, cpumask_of(cpu));
> > +}
> > +
> > static u32 noop_apic_read(u32 reg)
> > {
> > WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
> > @@ -95,13 +109,6 @@ static void noop_apic_write(u32 reg, u32 v)
> > WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
> > }
> >
> > -#ifdef CONFIG_X86_32
> > -static int noop_x86_32_early_logical_apicid(int cpu)
> > -{
> > - return BAD_APICID;
> > -}
> > -#endif
> > -
> > struct apic apic_noop __ro_after_init = {
> > .name = "noop",
> > .probe = noop_probe,
> > @@ -114,10 +121,12 @@ 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,
> >
> > + .vector_allocation_domain = noop_vector_allocation_domain,
> > .init_apic_ldr = noop_init_apic_ldr,
> >
> > .ioapic_phys_id_map = default_ioapic_phys_id_map,
> > @@ -133,7 +142,7 @@ struct apic apic_noop __ro_after_init = {
> > .get_apic_id = noop_get_apic_id,
> > .set_apic_id = NULL,
> >
> > - .calc_dest_apicid = apic_flat_calc_apicid,
> > + .cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
> >
> > .send_IPI = noop_send_IPI,
> > .send_IPI_mask = noop_send_IPI_mask,
> > diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
> > index 134e04506ab4..2fda912219a6 100644
> > --- a/arch/x86/kernel/apic/apic_numachip.c
> > +++ b/arch/x86/kernel/apic/apic_numachip.c
> > @@ -38,7 +38,7 @@ static unsigned int numachip1_get_apic_id(unsigned long x)
> > return id;
> > }
> >
> > -static u32 numachip1_set_apic_id(unsigned int id)
> > +static unsigned long numachip1_set_apic_id(unsigned int id)
> > {
> > return (id & 0xff) << 24;
> > }
> > @@ -51,7 +51,7 @@ static unsigned int numachip2_get_apic_id(unsigned long x)
> > return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
> > }
> >
> > -static u32 numachip2_set_apic_id(unsigned int id)
> > +static unsigned long numachip2_set_apic_id(unsigned int id)
> > {
> > return id << 24;
> > }
> > @@ -249,10 +249,12 @@ static const struct apic apic_numachip1 __refconst = {
> > .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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > .init_apic_ldr = flat_init_apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -265,7 +267,7 @@ static const struct apic apic_numachip1 __refconst = {
> > .get_apic_id = numachip1_get_apic_id,
> > .set_apic_id = numachip1_set_apic_id,
> >
> > - .calc_dest_apicid = apic_default_calc_apicid,
> > + .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
> >
> > .send_IPI = numachip_send_IPI_one,
> > .send_IPI_mask = numachip_send_IPI_mask,
> > @@ -298,10 +300,12 @@ static const struct apic apic_numachip2 __refconst = {
> > .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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > .init_apic_ldr = flat_init_apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -314,7 +318,7 @@ static const struct apic apic_numachip2 __refconst = {
> > .get_apic_id = numachip2_get_apic_id,
> > .set_apic_id = numachip2_set_apic_id,
> >
> > - .calc_dest_apicid = apic_default_calc_apicid,
> > + .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
> >
> > .send_IPI = numachip_send_IPI_one,
> > .send_IPI_mask = numachip_send_IPI_mask,
> > diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
> > index afee386ff711..e12fbcfc9571 100644
> > --- a/arch/x86/kernel/apic/bigsmp_32.c
> > +++ b/arch/x86/kernel/apic/bigsmp_32.c
> > @@ -27,9 +27,9 @@ static int bigsmp_apic_id_registered(void)
> > return 1;
> > }
> >
> > -static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
> > +static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
> > {
> > - return false;
> > + return 0;
> > }
> >
> > static int bigsmp_early_logical_apicid(int cpu)
> > @@ -155,10 +155,12 @@ static struct apic apic_bigsmp __ro_after_init = {
> > /* 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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > .init_apic_ldr = bigsmp_init_apic_ldr,
> >
> > .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
> > @@ -171,7 +173,7 @@ static struct apic apic_bigsmp __ro_after_init = {
> > .get_apic_id = bigsmp_get_apic_id,
> > .set_apic_id = NULL,
> >
> > - .calc_dest_apicid = apic_default_calc_apicid,
> > + .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
> >
> > .send_IPI = default_send_IPI_single_phys,
> > .send_IPI_mask = default_send_IPI_mask_sequence_phys,
> > diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
> > index 201579dc5242..18c8aca5bae7 100644
> > --- a/arch/x86/kernel/apic/io_apic.c
> > +++ b/arch/x86/kernel/apic/io_apic.c
> > @@ -1014,7 +1014,6 @@ static int alloc_isa_irq_from_domain(struct irq_domain *domain,
> > info->ioapic_pin))
> > return -ENOMEM;
> > } else {
> > - info->flags |= X86_IRQ_ALLOC_LEGACY;
> > irq = __irq_domain_alloc_irqs(domain, irq, 1, node, info, true,
> > NULL);
> > if (irq >= 0) {
> > @@ -1587,43 +1586,6 @@ static int __init notimercheck(char *s)
> > }
> > __setup("no_timer_check", notimercheck);
> >
> > -static void __init delay_with_tsc(void)
> > -{
> > - unsigned long long start, now;
> > - unsigned long end = jiffies + 4;
> > -
> > - start = rdtsc();
> > -
> > - /*
> > - * We don't know the TSC frequency yet, but waiting for
> > - * 40000000000/HZ TSC cycles is safe:
> > - * 4 GHz == 10 jiffies
> > - * 1 GHz == 40 jiffies
> > - */
> > - do {
> > - rep_nop();
> > - now = rdtsc();
> > - } while ((now - start) < 40000000000UL / HZ &&
> > - time_before_eq(jiffies, end));
> > -}
> > -
> > -static void __init delay_without_tsc(void)
> > -{
> > - unsigned long end = jiffies + 4;
> > - int band = 1;
> > -
> > - /*
> > - * We don't know any frequency yet, but waiting for
> > - * 40940000000/HZ cycles is safe:
> > - * 4 GHz == 10 jiffies
> > - * 1 GHz == 40 jiffies
> > - * 1 << 1 + 1 << 2 +...+ 1 << 11 = 4094
> > - */
> > - do {
> > - __delay(((1U << band++) * 10000000UL) / HZ);
> > - } while (band < 12 && time_before_eq(jiffies, end));
> > -}
> > -
> > /*
> > * There is a nasty bug in some older SMP boards, their mptable lies
> > * about the timer IRQ. We do the following to work around the situation:
> > @@ -1642,12 +1604,8 @@ static int __init timer_irq_works(void)
> >
> > local_save_flags(flags);
> > local_irq_enable();
> > -
> > - if (boot_cpu_has(X86_FEATURE_TSC))
> > - delay_with_tsc();
> > - else
> > - delay_without_tsc();
> > -
> > + /* Let ten ticks pass... */
> > + mdelay((10 * 1000) / HZ);
> > local_irq_restore(flags);
> >
> > /*
> > @@ -1863,36 +1821,26 @@ static void ioapic_ir_ack_level(struct irq_data *irq_data)
> > eoi_ioapic_pin(data->entry.vector, data);
> > }
> >
> > -static void ioapic_configure_entry(struct irq_data *irqd)
> > -{
> > - struct mp_chip_data *mpd = irqd->chip_data;
> > - struct irq_cfg *cfg = irqd_cfg(irqd);
> > - struct irq_pin_list *entry;
> > -
> > - /*
> > - * Only update when the parent is the vector domain, don't touch it
> > - * if the parent is the remapping domain. Check the installed
> > - * ioapic chip to verify that.
> > - */
> > - if (irqd->chip == &ioapic_chip) {
> > - mpd->entry.dest = cfg->dest_apicid;
> > - mpd->entry.vector = cfg->vector;
> > - }
> > - for_each_irq_pin(entry, mpd->irq_2_pin)
> > - __ioapic_write_entry(entry->apic, entry->pin, mpd->entry);
> > -}
> > -
> > static int ioapic_set_affinity(struct irq_data *irq_data,
> > const struct cpumask *mask, bool force)
> > {
> > struct irq_data *parent = irq_data->parent_data;
> > + struct mp_chip_data *data = irq_data->chip_data;
> > + struct irq_pin_list *entry;
> > + struct irq_cfg *cfg;
> > unsigned long flags;
> > int ret;
> >
> > ret = parent->chip->irq_set_affinity(parent, mask, force);
> > raw_spin_lock_irqsave(&ioapic_lock, flags);
> > - if (ret >= 0 && ret != IRQ_SET_MASK_OK_DONE)
> > - ioapic_configure_entry(irq_data);
> > + if (ret >= 0 && ret != IRQ_SET_MASK_OK_DONE) {
> > + cfg = irqd_cfg(irq_data);
> > + data->entry.dest = cfg->dest_apicid;
> > + data->entry.vector = cfg->vector;
> > + for_each_irq_pin(entry, data->irq_2_pin)
> > + __ioapic_write_entry(entry->apic, entry->pin,
> > + data->entry);
> > + }
> > raw_spin_unlock_irqrestore(&ioapic_lock, flags);
> >
> > return ret;
> > @@ -2565,9 +2513,52 @@ int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity)
> > }
> >
> > /*
> > - * This function updates target affinity of IOAPIC interrupts to include
> > - * the CPUs which came online during SMP bringup.
> > + * 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()
> > */
> > +#ifdef CONFIG_SMP
> > +void __init setup_ioapic_dest(void)
> > +{
> > + int pin, ioapic, irq, irq_entry;
> > + const struct cpumask *mask;
> > + struct irq_desc *desc;
> > + struct irq_data *idata;
> > + struct irq_chip *chip;
> > +
> > + if (skip_ioapic_setup == 1)
> > + return;
> > +
> > + for_each_ioapic_pin(ioapic, pin) {
> > + irq_entry = find_irq_entry(ioapic, pin, mp_INT);
> > + if (irq_entry == -1)
> > + continue;
> > +
> > + irq = pin_2_irq(irq_entry, ioapic, pin, 0);
> > + if (irq < 0 || !mp_init_irq_at_boot(ioapic, irq))
> > + continue;
> > +
> > + desc = irq_to_desc(irq);
> > + raw_spin_lock_irq(&desc->lock);
> > + idata = irq_desc_get_irq_data(desc);
> > +
> > + /*
> > + * Honour affinities which have been set in early boot
> > + */
> > + if (!irqd_can_balance(idata) || irqd_affinity_was_set(idata))
> > + mask = irq_data_get_affinity_mask(idata);
> > + else
> > + mask = apic->target_cpus();
> > +
> > + chip = irq_data_get_irq_chip(idata);
> > + /* Might be lapic_chip for irq 0 */
> > + if (chip->irq_set_affinity)
> > + chip->irq_set_affinity(idata, mask, false);
> > + raw_spin_unlock_irq(&desc->lock);
> > + }
> > +}
> > +#endif
> > +
> > #define IOAPIC_RESOURCE_NAME_SIZE 11
> >
> > static struct resource *ioapic_resources;
> > @@ -2991,9 +2982,12 @@ int mp_irqdomain_activate(struct irq_domain *domain,
> > struct irq_data *irq_data, bool early)
> > {
> > unsigned long flags;
> > + struct irq_pin_list *entry;
> > + struct mp_chip_data *data = irq_data->chip_data;
> >
> > raw_spin_lock_irqsave(&ioapic_lock, flags);
> > - ioapic_configure_entry(irq_data);
> > + for_each_irq_pin(entry, data->irq_2_pin)
> > + __ioapic_write_entry(entry->apic, entry->pin, data->entry);
> > raw_spin_unlock_irqrestore(&ioapic_lock, flags);
> > return 0;
> > }
> > diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
> > index fa22017de806..63287659adb6 100644
> > --- a/arch/x86/kernel/apic/probe_32.c
> > +++ b/arch/x86/kernel/apic/probe_32.c
> > @@ -66,31 +66,6 @@ static void setup_apic_flat_routing(void)
> > #endif
> > }
> >
> > -static int default_apic_id_registered(void)
> > -{
> > - return physid_isset(read_apic_id(), phys_cpu_present_map);
> > -}
> > -
> > -/*
> > - * Set up the logical destination ID. Intel recommends to set DFR, LDR and
> > - * TPR before enabling an APIC. See e.g. "AP-388 82489DX User's Manual"
> > - * (Intel document number 292116).
> > - */
> > -static void default_init_apic_ldr(void)
> > -{
> > - unsigned long val;
> > -
> > - apic_write(APIC_DFR, APIC_DFR_VALUE);
> > - val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
> > - val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
> > - apic_write(APIC_LDR, val);
> > -}
> > -
> > -static int default_phys_pkg_id(int cpuid_apic, int index_msb)
> > -{
> > - return cpuid_apic >> index_msb;
> > -}
> > -
> > /* should be called last. */
> > static int probe_default(void)
> > {
> > @@ -109,10 +84,12 @@ static struct apic apic_default __ro_after_init = {
> > /* 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,
> >
> > + .vector_allocation_domain = flat_vector_allocation_domain,
> > .init_apic_ldr = default_init_apic_ldr,
> >
> > .ioapic_phys_id_map = default_ioapic_phys_id_map,
> > @@ -125,7 +102,7 @@ static struct apic apic_default __ro_after_init = {
> > .get_apic_id = default_get_apic_id,
> > .set_apic_id = NULL,
> >
> > - .calc_dest_apicid = apic_flat_calc_apicid,
> > + .cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
> >
> > .send_IPI = default_send_IPI_single,
> > .send_IPI_mask = default_send_IPI_mask_logical,
> > diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
> > index 6a823a25eaff..e42fdd44972f 100644
> > --- a/arch/x86/kernel/apic/vector.c
> > +++ b/arch/x86/kernel/apic/vector.c
> > @@ -11,7 +11,6 @@
> > * published by the Free Software Foundation.
> > */
> > #include <linux/interrupt.h>
> > -#include <linux/seq_file.h>
> > #include <linux/init.h>
> > #include <linux/compiler.h>
> > #include <linux/slab.h>
> > @@ -22,30 +21,20 @@
> > #include <asm/desc.h>
> > #include <asm/irq_remapping.h>
> >
> > -#include <asm/trace/irq_vectors.h>
> > -
> > struct apic_chip_data {
> > - struct irq_cfg hw_irq_cfg;
> > - unsigned int vector;
> > - unsigned int prev_vector;
> > - unsigned int cpu;
> > - unsigned int prev_cpu;
> > - unsigned int irq;
> > - struct hlist_node clist;
> > - unsigned int move_in_progress : 1,
> > - is_managed : 1,
> > - can_reserve : 1,
> > - has_reserved : 1;
> > + struct irq_cfg cfg;
> > + cpumask_var_t domain;
> > + cpumask_var_t old_domain;
> > + u8 move_in_progress : 1;
> > };
> >
> > struct irq_domain *x86_vector_domain;
> > EXPORT_SYMBOL_GPL(x86_vector_domain);
> > static DEFINE_RAW_SPINLOCK(vector_lock);
> > -static cpumask_var_t vector_searchmask;
> > +static cpumask_var_t vector_cpumask, vector_searchmask, searched_cpumask;
> > static struct irq_chip lapic_controller;
> > -static struct irq_matrix *vector_matrix;
> > -#ifdef CONFIG_SMP
> > -static DEFINE_PER_CPU(struct hlist_head, cleanup_list);
> > +#ifdef CONFIG_X86_IO_APIC
> > +static struct apic_chip_data *legacy_irq_data[NR_IRQS_LEGACY];
> > #endif
> >
> > void lock_vector_lock(void)
> > @@ -61,37 +50,22 @@ void unlock_vector_lock(void)
> > raw_spin_unlock(&vector_lock);
> > }
> >
> > -void init_irq_alloc_info(struct irq_alloc_info *info,
> > - const struct cpumask *mask)
> > -{
> > - memset(info, 0, sizeof(*info));
> > - info->mask = mask;
> > -}
> > -
> > -void copy_irq_alloc_info(struct irq_alloc_info *dst, struct irq_alloc_info *src)
> > +static struct apic_chip_data *apic_chip_data(struct irq_data *irq_data)
> > {
> > - if (src)
> > - *dst = *src;
> > - else
> > - memset(dst, 0, sizeof(*dst));
> > -}
> > -
> > -static struct apic_chip_data *apic_chip_data(struct irq_data *irqd)
> > -{
> > - if (!irqd)
> > + if (!irq_data)
> > return NULL;
> >
> > - while (irqd->parent_data)
> > - irqd = irqd->parent_data;
> > + while (irq_data->parent_data)
> > + irq_data = irq_data->parent_data;
> >
> > - return irqd->chip_data;
> > + return irq_data->chip_data;
> > }
> >
> > -struct irq_cfg *irqd_cfg(struct irq_data *irqd)
> > +struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
> > {
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > + struct apic_chip_data *data = apic_chip_data(irq_data);
> >
> > - return apicd ? &apicd->hw_irq_cfg : NULL;
> > + return data ? &data->cfg : NULL;
> > }
> > EXPORT_SYMBOL_GPL(irqd_cfg);
> >
> > @@ -102,395 +76,270 @@ struct irq_cfg *irq_cfg(unsigned int irq)
> >
> > static struct apic_chip_data *alloc_apic_chip_data(int node)
> > {
> > - struct apic_chip_data *apicd;
> > -
> > - apicd = kzalloc_node(sizeof(*apicd), GFP_KERNEL, node);
> > - if (apicd)
> > - INIT_HLIST_NODE(&apicd->clist);
> > - return apicd;
> > -}
> > -
> > -static void free_apic_chip_data(struct apic_chip_data *apicd)
> > -{
> > - kfree(apicd);
> > -}
> > -
> > -static void apic_update_irq_cfg(struct irq_data *irqd, unsigned int vector,
> > - unsigned int cpu)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > + struct apic_chip_data *data;
> >
> > - lockdep_assert_held(&vector_lock);
> > -
> > - apicd->hw_irq_cfg.vector = vector;
> > - apicd->hw_irq_cfg.dest_apicid = apic->calc_dest_apicid(cpu);
> > - irq_data_update_effective_affinity(irqd, cpumask_of(cpu));
> > - trace_vector_config(irqd->irq, vector, cpu,
> > - apicd->hw_irq_cfg.dest_apicid);
> > -}
> > -
> > -static void apic_update_vector(struct irq_data *irqd, unsigned int newvec,
> > - unsigned int newcpu)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - struct irq_desc *desc = irq_data_to_desc(irqd);
> > -
> > - lockdep_assert_held(&vector_lock);
> > -
> > - trace_vector_update(irqd->irq, newvec, newcpu, apicd->vector,
> > - apicd->cpu);
> > -
> > - /* Setup the vector move, if required */
> > - if (apicd->vector && cpu_online(apicd->cpu)) {
> > - apicd->move_in_progress = true;
> > - apicd->prev_vector = apicd->vector;
> > - apicd->prev_cpu = apicd->cpu;
> > - } else {
> > - apicd->prev_vector = 0;
> > + data = kzalloc_node(sizeof(*data), GFP_KERNEL, node);
> > + if (!data)
> > + return NULL;
> > + if (!zalloc_cpumask_var_node(&data->domain, GFP_KERNEL, node))
> > + goto out_data;
> > + if (!zalloc_cpumask_var_node(&data->old_domain, GFP_KERNEL, node))
> > + goto out_domain;
> > + return data;
> > +out_domain:
> > + free_cpumask_var(data->domain);
> > +out_data:
> > + kfree(data);
> > + return NULL;
> > +}
> > +
> > +static void free_apic_chip_data(struct apic_chip_data *data)
> > +{
> > + if (data) {
> > + free_cpumask_var(data->domain);
> > + free_cpumask_var(data->old_domain);
> > + kfree(data);
> > }
> > -
> > - apicd->vector = newvec;
> > - apicd->cpu = newcpu;
> > - BUG_ON(!IS_ERR_OR_NULL(per_cpu(vector_irq, newcpu)[newvec]));
> > - per_cpu(vector_irq, newcpu)[newvec] = desc;
> > }
> >
> > -static void vector_assign_managed_shutdown(struct irq_data *irqd)
> > +static int __assign_irq_vector(int irq, struct apic_chip_data *d,
> > + const struct cpumask *mask,
> > + struct irq_data *irqdata)
> > {
> > - unsigned int cpu = cpumask_first(cpu_online_mask);
> > -
> > - apic_update_irq_cfg(irqd, MANAGED_IRQ_SHUTDOWN_VECTOR, cpu);
> > -}
> > + /*
> > + * NOTE! The local APIC isn't very good at handling
> > + * multiple interrupts at the same interrupt level.
> > + * As the interrupt level is determined by taking the
> > + * vector number and shifting that right by 4, we
> > + * want to spread these out a bit so that they don't
> > + * all fall in the same interrupt level.
> > + *
> > + * Also, we've got to be careful not to trash gate
> > + * 0x80, because int 0x80 is hm, kind of importantish. ;)
> > + */
> > + static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START;
> > + static int current_offset = VECTOR_OFFSET_START % 16;
> > + int cpu, vector;
> >
> > -static int reserve_managed_vector(struct irq_data *irqd)
> > -{
> > - const struct cpumask *affmsk = irq_data_get_affinity_mask(irqd);
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - unsigned long flags;
> > - int ret;
> > + /*
> > + * If there is still a move in progress or the previous move has not
> > + * been cleaned up completely, tell the caller to come back later.
> > + */
> > + if (d->move_in_progress ||
> > + cpumask_intersects(d->old_domain, cpu_online_mask))
> > + return -EBUSY;
> >
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - apicd->is_managed = true;
> > - ret = irq_matrix_reserve_managed(vector_matrix, affmsk);
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - trace_vector_reserve_managed(irqd->irq, ret);
> > - return ret;
> > -}
> > + /* Only try and allocate irqs on cpus that are present */
> > + cpumask_clear(d->old_domain);
> > + cpumask_clear(searched_cpumask);
> > + cpu = cpumask_first_and(mask, cpu_online_mask);
> > + while (cpu < nr_cpu_ids) {
> > + int new_cpu, offset;
> >
> > -static void reserve_irq_vector_locked(struct irq_data *irqd)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > + /* Get the possible target cpus for @mask/@cpu from the apic */
> > + apic->vector_allocation_domain(cpu, vector_cpumask, mask);
> >
> > - irq_matrix_reserve(vector_matrix);
> > - apicd->can_reserve = true;
> > - apicd->has_reserved = true;
> > - trace_vector_reserve(irqd->irq, 0);
> > - vector_assign_managed_shutdown(irqd);
> > -}
> > + /*
> > + * Clear the offline cpus from @vector_cpumask for searching
> > + * and verify whether the result overlaps with @mask. If true,
> > + * then the call to apic->cpu_mask_to_apicid() will
> > + * succeed as well. If not, no point in trying to find a
> > + * vector in this mask.
> > + */
> > + cpumask_and(vector_searchmask, vector_cpumask, cpu_online_mask);
> > + if (!cpumask_intersects(vector_searchmask, mask))
> > + goto next_cpu;
> > +
> > + if (cpumask_subset(vector_cpumask, d->domain)) {
> > + if (cpumask_equal(vector_cpumask, d->domain))
> > + goto success;
> > + /*
> > + * Mark the cpus which are not longer in the mask for
> > + * cleanup.
> > + */
> > + cpumask_andnot(d->old_domain, d->domain, vector_cpumask);
> > + vector = d->cfg.vector;
> > + goto update;
> > + }
> >
> > -static int reserve_irq_vector(struct irq_data *irqd)
> > -{
> > - unsigned long flags;
> > + vector = current_vector;
> > + offset = current_offset;
> > +next:
> > + vector += 16;
> > + if (vector >= FIRST_SYSTEM_VECTOR) {
> > + offset = (offset + 1) % 16;
> > + vector = FIRST_EXTERNAL_VECTOR + offset;
> > + }
> >
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - reserve_irq_vector_locked(irqd);
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - return 0;
> > -}
> > + /* If the search wrapped around, try the next cpu */
> > + if (unlikely(current_vector == vector))
> > + goto next_cpu;
> >
> > -static int allocate_vector(struct irq_data *irqd, const struct cpumask *dest)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - bool resvd = apicd->has_reserved;
> > - unsigned int cpu = apicd->cpu;
> > - int vector = apicd->vector;
> > + if (test_bit(vector, used_vectors))
> > + goto next;
> >
> > - lockdep_assert_held(&vector_lock);
> > + for_each_cpu(new_cpu, vector_searchmask) {
> > + if (!IS_ERR_OR_NULL(per_cpu(vector_irq, new_cpu)[vector]))
> > + goto next;
> > + }
> > + /* Found one! */
> > + current_vector = vector;
> > + current_offset = offset;
> > + /* Schedule the old vector for cleanup on all cpus */
> > + if (d->cfg.vector)
> > + cpumask_copy(d->old_domain, d->domain);
> > + for_each_cpu(new_cpu, vector_searchmask)
> > + per_cpu(vector_irq, new_cpu)[vector] = irq_to_desc(irq);
> > + goto update;
> > +
> > +next_cpu:
> > + /*
> > + * We exclude the current @vector_cpumask from the requested
> > + * @mask and try again with the next online cpu in the
> > + * result. We cannot modify @mask, so we use @vector_cpumask
> > + * as a temporary buffer here as it will be reassigned when
> > + * calling apic->vector_allocation_domain() above.
> > + */
> > + cpumask_or(searched_cpumask, searched_cpumask, vector_cpumask);
> > + cpumask_andnot(vector_cpumask, mask, searched_cpumask);
> > + cpu = cpumask_first_and(vector_cpumask, cpu_online_mask);
> > + continue;
> > + }
> > + return -ENOSPC;
> >
> > +update:
> > /*
> > - * If the current target CPU is online and in the new requested
> > - * affinity mask, there is no point in moving the interrupt from
> > - * one CPU to another.
> > + * Exclude offline cpus from the cleanup mask and set the
> > + * move_in_progress flag when the result is not empty.
> > */
> > - if (vector && cpu_online(cpu) && cpumask_test_cpu(cpu, dest))
> > - return 0;
> > -
> > - vector = irq_matrix_alloc(vector_matrix, dest, resvd, &cpu);
> > - if (vector > 0)
> > - apic_update_vector(irqd, vector, cpu);
> > - trace_vector_alloc(irqd->irq, vector, resvd, vector);
> > - return vector;
> > -}
> > -
> > -static int assign_vector_locked(struct irq_data *irqd,
> > - const struct cpumask *dest)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - int vector = allocate_vector(irqd, dest);
> > -
> > - if (vector < 0)
> > - return vector;
> > -
> > - apic_update_irq_cfg(irqd, apicd->vector, apicd->cpu);
> > + cpumask_and(d->old_domain, d->old_domain, cpu_online_mask);
> > + d->move_in_progress = !cpumask_empty(d->old_domain);
> > + d->cfg.old_vector = d->move_in_progress ? d->cfg.vector : 0;
> > + d->cfg.vector = vector;
> > + cpumask_copy(d->domain, vector_cpumask);
> > +success:
> > + /*
> > + * Cache destination APIC IDs into cfg->dest_apicid. This cannot fail
> > + * as we already established, that mask & d->domain & cpu_online_mask
> > + * is not empty.
> > + *
> > + * vector_searchmask is a subset of d->domain and has the offline
> > + * cpus masked out.
> > + */
> > + cpumask_and(vector_searchmask, vector_searchmask, mask);
> > + BUG_ON(apic->cpu_mask_to_apicid(vector_searchmask, irqdata,
> > + &d->cfg.dest_apicid));
> > return 0;
> > }
> >
> > -static int assign_irq_vector(struct irq_data *irqd, const struct cpumask *dest)
> > +static int assign_irq_vector(int irq, struct apic_chip_data *data,
> > + const struct cpumask *mask,
> > + struct irq_data *irqdata)
> > {
> > + int err;
> > unsigned long flags;
> > - int ret;
> >
> > raw_spin_lock_irqsave(&vector_lock, flags);
> > - cpumask_and(vector_searchmask, dest, cpu_online_mask);
> > - ret = assign_vector_locked(irqd, vector_searchmask);
> > + err = __assign_irq_vector(irq, data, mask, irqdata);
> > raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - return ret;
> > -}
> > -
> > -static int assign_irq_vector_any_locked(struct irq_data *irqd)
> > -{
> > - /* Get the affinity mask - either irq_default_affinity or (user) set */
> > - const struct cpumask *affmsk = irq_data_get_affinity_mask(irqd);
> > - int node = irq_data_get_node(irqd);
> > -
> > - if (node == NUMA_NO_NODE)
> > - goto all;
> > - /* Try the intersection of @affmsk and node mask */
> > - cpumask_and(vector_searchmask, cpumask_of_node(node), affmsk);
> > - if (!assign_vector_locked(irqd, vector_searchmask))
> > - return 0;
> > - /* Try the node mask */
> > - if (!assign_vector_locked(irqd, cpumask_of_node(node)))
> > - return 0;
> > -all:
> > - /* Try the full affinity mask */
> > - cpumask_and(vector_searchmask, affmsk, cpu_online_mask);
> > - if (!assign_vector_locked(irqd, vector_searchmask))
> > - return 0;
> > - /* Try the full online mask */
> > - return assign_vector_locked(irqd, cpu_online_mask);
> > -}
> > -
> > -static int
> > -assign_irq_vector_policy(struct irq_data *irqd, struct irq_alloc_info *info)
> > -{
> > - if (irqd_affinity_is_managed(irqd))
> > - return reserve_managed_vector(irqd);
> > - if (info->mask)
> > - return assign_irq_vector(irqd, info->mask);
> > - /*
> > - * Make only a global reservation with no guarantee. A real vector
> > - * is associated at activation time.
> > - */
> > - return reserve_irq_vector(irqd);
> > + return err;
> > }
> >
> > -static int
> > -assign_managed_vector(struct irq_data *irqd, const struct cpumask *dest)
> > +static int assign_irq_vector_policy(int irq, int node,
> > + struct apic_chip_data *data,
> > + struct irq_alloc_info *info,
> > + struct irq_data *irqdata)
> > {
> > - const struct cpumask *affmsk = irq_data_get_affinity_mask(irqd);
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - int vector, cpu;
> > -
> > - cpumask_and(vector_searchmask, vector_searchmask, affmsk);
> > - cpu = cpumask_first(vector_searchmask);
> > - if (cpu >= nr_cpu_ids)
> > - return -EINVAL;
> > - /* set_affinity might call here for nothing */
> > - if (apicd->vector && cpumask_test_cpu(apicd->cpu, vector_searchmask))
> > + if (info && info->mask)
> > + return assign_irq_vector(irq, data, info->mask, irqdata);
> > + if (node != NUMA_NO_NODE &&
> > + assign_irq_vector(irq, data, cpumask_of_node(node), irqdata) == 0)
> > return 0;
> > - vector = irq_matrix_alloc_managed(vector_matrix, cpu);
> > - trace_vector_alloc_managed(irqd->irq, vector, vector);
> > - if (vector < 0)
> > - return vector;
> > - apic_update_vector(irqd, vector, cpu);
> > - apic_update_irq_cfg(irqd, vector, cpu);
> > - return 0;
> > -}
> > -
> > -static void clear_irq_vector(struct irq_data *irqd)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - bool managed = irqd_affinity_is_managed(irqd);
> > - unsigned int vector = apicd->vector;
> > -
> > - lockdep_assert_held(&vector_lock);
> > -
> > - if (!vector)
> > - return;
> > -
> > - trace_vector_clear(irqd->irq, vector, apicd->cpu, apicd->prev_vector,
> > - apicd->prev_cpu);
> > -
> > - per_cpu(vector_irq, apicd->cpu)[vector] = VECTOR_UNUSED;
> > - irq_matrix_free(vector_matrix, apicd->cpu, vector, managed);
> > - apicd->vector = 0;
> > -
> > - /* Clean up move in progress */
> > - vector = apicd->prev_vector;
> > - if (!vector)
> > - return;
> > -
> > - per_cpu(vector_irq, apicd->prev_cpu)[vector] = VECTOR_UNUSED;
> > - irq_matrix_free(vector_matrix, apicd->prev_cpu, vector, managed);
> > - apicd->prev_vector = 0;
> > - apicd->move_in_progress = 0;
> > - hlist_del_init(&apicd->clist);
> > + return assign_irq_vector(irq, data, apic->target_cpus(), irqdata);
> > }
> >
> > -static void x86_vector_deactivate(struct irq_domain *dom, struct irq_data *irqd)
> > +static void clear_irq_vector(int irq, struct apic_chip_data *data)
> > {
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - unsigned long flags;
> > + struct irq_desc *desc;
> > + int cpu, vector;
> >
> > - trace_vector_deactivate(irqd->irq, apicd->is_managed,
> > - apicd->can_reserve, false);
> > -
> > - /* Regular fixed assigned interrupt */
> > - if (!apicd->is_managed && !apicd->can_reserve)
> > - return;
> > - /* If the interrupt has a global reservation, nothing to do */
> > - if (apicd->has_reserved)
> > + if (!data->cfg.vector)
> > return;
> >
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - clear_irq_vector(irqd);
> > - if (apicd->can_reserve)
> > - reserve_irq_vector_locked(irqd);
> > - else
> > - vector_assign_managed_shutdown(irqd);
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > -}
> > -
> > -static int activate_reserved(struct irq_data *irqd)
> > -{
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - int ret;
> > -
> > - ret = assign_irq_vector_any_locked(irqd);
> > - if (!ret)
> > - apicd->has_reserved = false;
> > - return ret;
> > -}
> > + vector = data->cfg.vector;
> > + for_each_cpu_and(cpu, data->domain, cpu_online_mask)
> > + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNUSED;
> >
> > -static int activate_managed(struct irq_data *irqd)
> > -{
> > - const struct cpumask *dest = irq_data_get_affinity_mask(irqd);
> > - int ret;
> > -
> > - cpumask_and(vector_searchmask, dest, cpu_online_mask);
> > - if (WARN_ON_ONCE(cpumask_empty(vector_searchmask))) {
> > - /* Something in the core code broke! Survive gracefully */
> > - pr_err("Managed startup for irq %u, but no CPU\n", irqd->irq);
> > - return EINVAL;
> > - }
> > + data->cfg.vector = 0;
> > + cpumask_clear(data->domain);
> >
> > - ret = assign_managed_vector(irqd, vector_searchmask);
> > /*
> > - * This should not happen. The vector reservation got buggered. Handle
> > - * it gracefully.
> > + * If move is in progress or the old_domain mask is not empty,
> > + * i.e. the cleanup IPI has not been processed yet, we need to remove
> > + * the old references to desc from all cpus vector tables.
> > */
> > - if (WARN_ON_ONCE(ret < 0)) {
> > - pr_err("Managed startup irq %u, no vector available\n",
> > - irqd->irq);
> > + if (!data->move_in_progress && cpumask_empty(data->old_domain))
> > + return;
> > +
> > + desc = irq_to_desc(irq);
> > + for_each_cpu_and(cpu, data->old_domain, cpu_online_mask) {
> > + for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS;
> > + vector++) {
> > + if (per_cpu(vector_irq, cpu)[vector] != desc)
> > + continue;
> > + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNUSED;
> > + break;
> > + }
> > }
> > - return ret;
> > + data->move_in_progress = 0;
> > }
> >
> > -static int x86_vector_activate(struct irq_domain *dom, struct irq_data *irqd,
> > - bool early)
> > +void init_irq_alloc_info(struct irq_alloc_info *info,
> > + const struct cpumask *mask)
> > {
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - unsigned long flags;
> > - int ret = 0;
> > -
> > - trace_vector_activate(irqd->irq, apicd->is_managed,
> > - apicd->can_reserve, early);
> > -
> > - /* Nothing to do for fixed assigned vectors */
> > - if (!apicd->can_reserve && !apicd->is_managed)
> > - return 0;
> > -
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - if (early || irqd_is_managed_and_shutdown(irqd))
> > - vector_assign_managed_shutdown(irqd);
> > - else if (apicd->is_managed)
> > - ret = activate_managed(irqd);
> > - else if (apicd->has_reserved)
> > - ret = activate_reserved(irqd);
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - return ret;
> > + memset(info, 0, sizeof(*info));
> > + info->mask = mask;
> > }
> >
> > -static void vector_free_reserved_and_managed(struct irq_data *irqd)
> > +void copy_irq_alloc_info(struct irq_alloc_info *dst, struct irq_alloc_info *src)
> > {
> > - const struct cpumask *dest = irq_data_get_affinity_mask(irqd);
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > -
> > - trace_vector_teardown(irqd->irq, apicd->is_managed,
> > - apicd->has_reserved);
> > -
> > - if (apicd->has_reserved)
> > - irq_matrix_remove_reserved(vector_matrix);
> > - if (apicd->is_managed)
> > - irq_matrix_remove_managed(vector_matrix, dest);
> > + if (src)
> > + *dst = *src;
> > + else
> > + memset(dst, 0, sizeof(*dst));
> > }
> >
> > static void x86_vector_free_irqs(struct irq_domain *domain,
> > unsigned int virq, unsigned int nr_irqs)
> > {
> > - struct apic_chip_data *apicd;
> > - struct irq_data *irqd;
> > + struct apic_chip_data *apic_data;
> > + struct irq_data *irq_data;
> > unsigned long flags;
> > int i;
> >
> > for (i = 0; i < nr_irqs; i++) {
> > - irqd = irq_domain_get_irq_data(x86_vector_domain, virq + i);
> > - if (irqd && irqd->chip_data) {
> > + irq_data = irq_domain_get_irq_data(x86_vector_domain, virq + i);
> > + if (irq_data && irq_data->chip_data) {
> > raw_spin_lock_irqsave(&vector_lock, flags);
> > - clear_irq_vector(irqd);
> > - vector_free_reserved_and_managed(irqd);
> > - apicd = irqd->chip_data;
> > - irq_domain_reset_irq_data(irqd);
> > + clear_irq_vector(virq + i, irq_data->chip_data);
> > + apic_data = irq_data->chip_data;
> > + irq_domain_reset_irq_data(irq_data);
> > raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - free_apic_chip_data(apicd);
> > + free_apic_chip_data(apic_data);
> > +#ifdef CONFIG_X86_IO_APIC
> > + if (virq + i < nr_legacy_irqs())
> > + legacy_irq_data[virq + i] = NULL;
> > +#endif
> > }
> > }
> > }
> >
> > -static bool vector_configure_legacy(unsigned int virq, struct irq_data *irqd,
> > - struct apic_chip_data *apicd)
> > -{
> > - unsigned long flags;
> > - bool realloc = false;
> > -
> > - apicd->vector = ISA_IRQ_VECTOR(virq);
> > - apicd->cpu = 0;
> > -
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - /*
> > - * If the interrupt is activated, then it must stay at this vector
> > - * position. That's usually the timer interrupt (0).
> > - */
> > - if (irqd_is_activated(irqd)) {
> > - trace_vector_setup(virq, true, 0);
> > - apic_update_irq_cfg(irqd, apicd->vector, apicd->cpu);
> > - } else {
> > - /* Release the vector */
> > - apicd->can_reserve = true;
> > - clear_irq_vector(irqd);
> > - realloc = true;
> > - }
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - return realloc;
> > -}
> > -
> > static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
> > unsigned int nr_irqs, void *arg)
> > {
> > struct irq_alloc_info *info = arg;
> > - struct apic_chip_data *apicd;
> > - struct irq_data *irqd;
> > + struct apic_chip_data *data;
> > + struct irq_data *irq_data;
> > int i, err, node;
> >
> > if (disable_apic)
> > @@ -501,37 +350,34 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
> > return -ENOSYS;
> >
> > for (i = 0; i < nr_irqs; i++) {
> > - irqd = irq_domain_get_irq_data(domain, virq + i);
> > - BUG_ON(!irqd);
> > - node = irq_data_get_node(irqd);
> > - WARN_ON_ONCE(irqd->chip_data);
> > - apicd = alloc_apic_chip_data(node);
> > - if (!apicd) {
> > + irq_data = irq_domain_get_irq_data(domain, virq + i);
> > + BUG_ON(!irq_data);
> > + node = irq_data_get_node(irq_data);
> > +#ifdef CONFIG_X86_IO_APIC
> > + if (virq + i < nr_legacy_irqs() && legacy_irq_data[virq + i])
> > + data = legacy_irq_data[virq + i];
> > + else
> > +#endif
> > + data = alloc_apic_chip_data(node);
> > + if (!data) {
> > err = -ENOMEM;
> > goto error;
> > }
> >
> > - apicd->irq = virq + i;
> > - irqd->chip = &lapic_controller;
> > - irqd->chip_data = apicd;
> > - irqd->hwirq = virq + i;
> > - irqd_set_single_target(irqd);
> > - /*
> > - * Legacy vectors are already assigned when the IOAPIC
> > - * takes them over. They stay on the same vector. This is
> > - * required for check_timer() to work correctly as it might
> > - * switch back to legacy mode. Only update the hardware
> > - * config.
> > - */
> > - if (info->flags & X86_IRQ_ALLOC_LEGACY) {
> > - if (!vector_configure_legacy(virq + i, irqd, apicd))
> > - continue;
> > - }
> > -
> > - err = assign_irq_vector_policy(irqd, info);
> > - trace_vector_setup(virq + i, false, err);
> > + irq_data->chip = &lapic_controller;
> > + irq_data->chip_data = data;
> > + irq_data->hwirq = virq + i;
> > + err = assign_irq_vector_policy(virq + i, node, data, info,
> > + irq_data);
> > if (err)
> > goto error;
> > + /*
> > + * If the apic destination mode is physical, then the
> > + * effective affinity is restricted to a single target
> > + * CPU. Mark the interrupt accordingly.
> > + */
> > + if (!apic->irq_dest_mode)
> > + irqd_set_single_target(irq_data);
> > }
> >
> > return 0;
> > @@ -541,56 +387,9 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
> > return err;
> > }
> >
> > -#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
> > -void x86_vector_debug_show(struct seq_file *m, struct irq_domain *d,
> > - struct irq_data *irqd, int ind)
> > -{
> > - unsigned int cpu, vector, prev_cpu, prev_vector;
> > - struct apic_chip_data *apicd;
> > - unsigned long flags;
> > - int irq;
> > -
> > - if (!irqd) {
> > - irq_matrix_debug_show(m, vector_matrix, ind);
> > - return;
> > - }
> > -
> > - irq = irqd->irq;
> > - if (irq < nr_legacy_irqs() && !test_bit(irq, &io_apic_irqs)) {
> > - seq_printf(m, "%*sVector: %5d\n", ind, "", ISA_IRQ_VECTOR(irq));
> > - seq_printf(m, "%*sTarget: Legacy PIC all CPUs\n", ind, "");
> > - return;
> > - }
> > -
> > - apicd = irqd->chip_data;
> > - if (!apicd) {
> > - seq_printf(m, "%*sVector: Not assigned\n", ind, "");
> > - return;
> > - }
> > -
> > - raw_spin_lock_irqsave(&vector_lock, flags);
> > - cpu = apicd->cpu;
> > - vector = apicd->vector;
> > - prev_cpu = apicd->prev_cpu;
> > - prev_vector = apicd->prev_vector;
> > - raw_spin_unlock_irqrestore(&vector_lock, flags);
> > - seq_printf(m, "%*sVector: %5u\n", ind, "", vector);
> > - seq_printf(m, "%*sTarget: %5u\n", ind, "", cpu);
> > - if (prev_vector) {
> > - seq_printf(m, "%*sPrevious vector: %5u\n", ind, "", prev_vector);
> > - seq_printf(m, "%*sPrevious target: %5u\n", ind, "", prev_cpu);
> > - }
> > -}
> > -#endif
> > -
> > static const struct irq_domain_ops x86_vector_domain_ops = {
> > - .alloc = x86_vector_alloc_irqs,
> > - .free = x86_vector_free_irqs,
> > - .activate = x86_vector_activate,
> > - .deactivate = x86_vector_deactivate,
> > -#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
> > - .debug_show = x86_vector_debug_show,
> > -#endif
> > + .alloc = x86_vector_alloc_irqs,
> > + .free = x86_vector_free_irqs,
> > };
> >
> > int __init arch_probe_nr_irqs(void)
> > @@ -620,40 +419,35 @@ int __init arch_probe_nr_irqs(void)
> > return legacy_pic->probe();
> > }
> >
> > -void lapic_assign_legacy_vector(unsigned int irq, bool replace)
> > +#ifdef CONFIG_X86_IO_APIC
> > +static void __init init_legacy_irqs(void)
> > {
> > + int i, node = cpu_to_node(0);
> > + struct apic_chip_data *data;
> > +
> > /*
> > - * Use assign system here so it wont get accounted as allocated
> > - * and moveable in the cpu hotplug check and it prevents managed
> > - * irq reservation from touching it.
> > + * For legacy IRQ's, start with assigning irq0 to irq15 to
> > + * ISA_IRQ_VECTOR(i) for all cpu's.
> > */
> > - irq_matrix_assign_system(vector_matrix, ISA_IRQ_VECTOR(irq), replace);
> > -}
> > -
> > -void __init lapic_assign_system_vectors(void)
> > -{
> > - unsigned int i, vector = 0;
> > -
> > - for_each_set_bit_from(vector, system_vectors, NR_VECTORS)
> > - irq_matrix_assign_system(vector_matrix, vector, false);
> > -
> > - if (nr_legacy_irqs() > 1)
> > - lapic_assign_legacy_vector(PIC_CASCADE_IR, false);
> > -
> > - /* System vectors are reserved, online it */
> > - irq_matrix_online(vector_matrix);
> > -
> > - /* Mark the preallocated legacy interrupts */
> > for (i = 0; i < nr_legacy_irqs(); i++) {
> > - if (i != PIC_CASCADE_IR)
> > - irq_matrix_assign(vector_matrix, ISA_IRQ_VECTOR(i));
> > + data = legacy_irq_data[i] = alloc_apic_chip_data(node);
> > + BUG_ON(!data);
> > +
> > + data->cfg.vector = ISA_IRQ_VECTOR(i);
> > + cpumask_setall(data->domain);
> > + irq_set_chip_data(i, data);
> > }
> > }
> > +#else
> > +static inline void init_legacy_irqs(void) { }
> > +#endif
> >
> > int __init arch_early_irq_init(void)
> > {
> > struct fwnode_handle *fn;
> >
> > + init_legacy_irqs();
> > +
> > fn = irq_domain_alloc_named_fwnode("VECTOR");
> > BUG_ON(!fn);
> > x86_vector_domain = irq_domain_create_tree(fn, &x86_vector_domain_ops,
> > @@ -664,115 +458,100 @@ int __init arch_early_irq_init(void)
> >
> > arch_init_msi_domain(x86_vector_domain);
> >
> > + BUG_ON(!alloc_cpumask_var(&vector_cpumask, GFP_KERNEL));
> > BUG_ON(!alloc_cpumask_var(&vector_searchmask, GFP_KERNEL));
> > -
> > - /*
> > - * Allocate the vector matrix allocator data structure and limit the
> > - * search area.
> > - */
> > - vector_matrix = irq_alloc_matrix(NR_VECTORS, FIRST_EXTERNAL_VECTOR,
> > - FIRST_SYSTEM_VECTOR);
> > - BUG_ON(!vector_matrix);
> > + BUG_ON(!alloc_cpumask_var(&searched_cpumask, GFP_KERNEL));
> >
> > return arch_early_ioapic_init();
> > }
> >
> > -#ifdef CONFIG_SMP
> > -
> > -static struct irq_desc *__setup_vector_irq(int vector)
> > +/* Initialize vector_irq on a new cpu */
> > +static void __setup_vector_irq(int cpu)
> > {
> > - int isairq = vector - ISA_IRQ_VECTOR(0);
> > -
> > - /* Check whether the irq is in the legacy space */
> > - if (isairq < 0 || isairq >= nr_legacy_irqs())
> > - return VECTOR_UNUSED;
> > - /* Check whether the irq is handled by the IOAPIC */
> > - if (test_bit(isairq, &io_apic_irqs))
> > - return VECTOR_UNUSED;
> > - return irq_to_desc(isairq);
> > -}
> > + struct apic_chip_data *data;
> > + struct irq_desc *desc;
> > + int irq, vector;
> >
> > -/* Online the local APIC infrastructure and initialize the vectors */
> > -void lapic_online(void)
> > -{
> > - unsigned int vector;
> > + /* Mark the inuse vectors */
> > + for_each_irq_desc(irq, desc) {
> > + struct irq_data *idata = irq_desc_get_irq_data(desc);
> >
> > - lockdep_assert_held(&vector_lock);
> > -
> > - /* Online the vector matrix array for this CPU */
> > - irq_matrix_online(vector_matrix);
> > -
> > - /*
> > - * The interrupt affinity logic never targets interrupts to offline
> > - * CPUs. The exception are the legacy PIC interrupts. In general
> > - * they are only targeted to CPU0, but depending on the platform
> > - * they can be distributed to any online CPU in hardware. The
> > - * kernel has no influence on that. So all active legacy vectors
> > - * must be installed on all CPUs. All non legacy interrupts can be
> > - * cleared.
> > - */
> > - for (vector = 0; vector < NR_VECTORS; vector++)
> > - this_cpu_write(vector_irq[vector], __setup_vector_irq(vector));
> > -}
> > + data = apic_chip_data(idata);
> > + if (!data || !cpumask_test_cpu(cpu, data->domain))
> > + continue;
> > + vector = data->cfg.vector;
> > + per_cpu(vector_irq, cpu)[vector] = desc;
> > + }
> > + /* Mark the free vectors */
> > + for (vector = 0; vector < NR_VECTORS; ++vector) {
> > + desc = per_cpu(vector_irq, cpu)[vector];
> > + if (IS_ERR_OR_NULL(desc))
> > + continue;
> >
> > -void lapic_offline(void)
> > -{
> > - lock_vector_lock();
> > - irq_matrix_offline(vector_matrix);
> > - unlock_vector_lock();
> > + data = apic_chip_data(irq_desc_get_irq_data(desc));
> > + if (!cpumask_test_cpu(cpu, data->domain))
> > + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNUSED;
> > + }
> > }
> >
> > -static int apic_set_affinity(struct irq_data *irqd,
> > - const struct cpumask *dest, bool force)
> > +/*
> > + * Setup the vector to irq mappings. Must be called with vector_lock held.
> > + */
> > +void setup_vector_irq(int cpu)
> > {
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > - int err;
> > + int irq;
> >
> > + lockdep_assert_held(&vector_lock);
> > /*
> > - * Core code can call here for inactive interrupts. For inactive
> > - * interrupts which use managed or reservation mode there is no
> > - * point in going through the vector assignment right now as the
> > - * activation will assign a vector which fits the destination
> > - * cpumask. Let the core code store the destination mask and be
> > - * done with it.
> > + * On most of the platforms, legacy PIC delivers the interrupts on the
> > + * boot cpu. But there are certain platforms where PIC interrupts are
> > + * delivered to multiple cpu's. If the legacy IRQ is handled by the
> > + * legacy PIC, for the new cpu that is coming online, setup the static
> > + * legacy vector to irq mapping:
> > */
> > - if (!irqd_is_activated(irqd) &&
> > - (apicd->is_managed || apicd->can_reserve))
> > - return IRQ_SET_MASK_OK;
> > + for (irq = 0; irq < nr_legacy_irqs(); irq++)
> > + per_cpu(vector_irq, cpu)[ISA_IRQ_VECTOR(irq)] = irq_to_desc(irq);
> >
> > - raw_spin_lock(&vector_lock);
> > - cpumask_and(vector_searchmask, dest, cpu_online_mask);
> > - if (irqd_affinity_is_managed(irqd))
> > - err = assign_managed_vector(irqd, vector_searchmask);
> > - else
> > - err = assign_vector_locked(irqd, vector_searchmask);
> > - raw_spin_unlock(&vector_lock);
> > - return err ? err : IRQ_SET_MASK_OK;
> > + __setup_vector_irq(cpu);
> > }
> >
> > -#else
> > -# define apic_set_affinity NULL
> > -#endif
> > -
> > -static int apic_retrigger_irq(struct irq_data *irqd)
> > +static int apic_retrigger_irq(struct irq_data *irq_data)
> > {
> > - struct apic_chip_data *apicd = apic_chip_data(irqd);
> > + struct apic_chip_data *data = apic_chip_data(irq_data);
> > unsigned long flags;
> > + int cpu;
> >
> > raw_spin_lock_irqsave(&vector_lock, flags);
> > - apic->send_IPI(apicd->cpu, apicd->vector);
> > + cpu = cpumask_first_and(data->domain, cpu_online_mask);
> > + apic->send_IPI_mask(cpumask_of(cpu), data->cfg.vector);
> > raw_spin_unlock_irqrestore(&vector_lock, flags);
> >
> > return 1;
> > }
> >
> > -void apic_ack_edge(struct irq_data *irqd)
> > +void apic_ack_edge(struct irq_data *data)
> > {
> > - irq_complete_move(irqd_cfg(irqd));
> > - irq_move_irq(irqd);
> > + irq_complete_move(irqd_cfg(data));
> > + irq_move_irq(data);
> > ack_APIC_irq();
> > }
> >
> > +static int apic_set_affinity(struct irq_data *irq_data,
> > + const struct cpumask *dest, bool force)
> > +{
> > + struct apic_chip_data *data = irq_data->chip_data;
> > + int err, irq = irq_data->irq;
> > +
> > + if (!IS_ENABLED(CONFIG_SMP))
> > + return -EPERM;
> > +
> > + if (!cpumask_intersects(dest, cpu_online_mask))
> > + return -EINVAL;
> > +
> > + err = assign_irq_vector(irq, data, dest, irq_data);
> > + return err ? err : IRQ_SET_MASK_OK;
> > +}
> > +
> > static struct irq_chip lapic_controller = {
> > .name = "APIC",
> > .irq_ack = apic_ack_edge,
> > @@ -781,98 +560,115 @@ static struct irq_chip lapic_controller = {
> > };
> >
> > #ifdef CONFIG_SMP
> > +static void __send_cleanup_vector(struct apic_chip_data *data)
> > +{
> > + raw_spin_lock(&vector_lock);
> > + cpumask_and(data->old_domain, data->old_domain, cpu_online_mask);
> > + data->move_in_progress = 0;
> > + if (!cpumask_empty(data->old_domain))
> > + apic->send_IPI_mask(data->old_domain, IRQ_MOVE_CLEANUP_VECTOR);
> > + raw_spin_unlock(&vector_lock);
> > +}
> >
> > -static void free_moved_vector(struct apic_chip_data *apicd)
> > +void send_cleanup_vector(struct irq_cfg *cfg)
> > {
> > - unsigned int vector = apicd->prev_vector;
> > - unsigned int cpu = apicd->prev_cpu;
> > - bool managed = apicd->is_managed;
> > + struct apic_chip_data *data;
> >
> > - /*
> > - * This should never happen. Managed interrupts are not
> > - * migrated except on CPU down, which does not involve the
> > - * cleanup vector. But try to keep the accounting correct
> > - * nevertheless.
> > - */
> > - WARN_ON_ONCE(managed);
> > -
> > - trace_vector_free_moved(apicd->irq, cpu, vector, managed);
> > - irq_matrix_free(vector_matrix, cpu, vector, managed);
> > - per_cpu(vector_irq, cpu)[vector] = VECTOR_UNUSED;
> > - hlist_del_init(&apicd->clist);
> > - apicd->prev_vector = 0;
> > - apicd->move_in_progress = 0;
> > + data = container_of(cfg, struct apic_chip_data, cfg);
> > + if (data->move_in_progress)
> > + __send_cleanup_vector(data);
> > }
> >
> > asmlinkage __visible void __irq_entry smp_irq_move_cleanup_interrupt(void)
> > {
> > - struct hlist_head *clhead = this_cpu_ptr(&cleanup_list);
> > - struct apic_chip_data *apicd;
> > - struct hlist_node *tmp;
> > + unsigned vector, me;
> >
> > entering_ack_irq();
> > +
> > /* Prevent vectors vanishing under us */
> > raw_spin_lock(&vector_lock);
> >
> > - hlist_for_each_entry_safe(apicd, tmp, clhead, clist) {
> > - unsigned int irr, vector = apicd->prev_vector;
> > + me = smp_processor_id();
> > + for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
> > + struct apic_chip_data *data;
> > + struct irq_desc *desc;
> > + unsigned int irr;
> > +
> > + retry:
> > + desc = __this_cpu_read(vector_irq[vector]);
> > + if (IS_ERR_OR_NULL(desc))
> > + continue;
> > +
> > + if (!raw_spin_trylock(&desc->lock)) {
> > + raw_spin_unlock(&vector_lock);
> > + cpu_relax();
> > + raw_spin_lock(&vector_lock);
> > + goto retry;
> > + }
> > +
> > + data = apic_chip_data(irq_desc_get_irq_data(desc));
> > + if (!data)
> > + goto unlock;
> >
> > /*
> > - * Paranoia: Check if the vector that needs to be cleaned
> > - * up is registered at the APICs IRR. If so, then this is
> > - * not the best time to clean it up. Clean it up in the
> > - * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
> > - * to this CPU. IRQ_MOVE_CLEANUP_VECTOR is the lowest
> > - * priority external vector, so on return from this
> > - * interrupt the device interrupt will happen first.
> > + * Nothing to cleanup if irq migration is in progress
> > + * or this cpu is not set in the cleanup mask.
> > + */
> > + if (data->move_in_progress ||
> > + !cpumask_test_cpu(me, data->old_domain))
> > + goto unlock;
> > +
> > + /*
> > + * We have two cases to handle here:
> > + * 1) vector is unchanged but the target mask got reduced
> > + * 2) vector and the target mask has changed
> > + *
> > + * #1 is obvious, but in #2 we have two vectors with the same
> > + * irq descriptor: the old and the new vector. So we need to
> > + * make sure that we only cleanup the old vector. The new
> > + * vector has the current @vector number in the config and
> > + * this cpu is part of the target mask. We better leave that
> > + * one alone.
> > */
> > + if (vector == data->cfg.vector &&
> > + cpumask_test_cpu(me, data->domain))
> > + goto unlock;
> > +
> > irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
> > - if (irr & (1U << (vector % 32))) {
> > + /*
> > + * Check if the vector that needs to be cleanedup is
> > + * registered at the cpu's IRR. If so, then this is not
> > + * the best time to clean it up. Lets clean it up in the
> > + * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
> > + * to myself.
> > + */
> > + if (irr & (1 << (vector % 32))) {
> > apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
> > - continue;
> > + goto unlock;
> > }
> > - free_moved_vector(apicd);
> > + __this_cpu_write(vector_irq[vector], VECTOR_UNUSED);
> > + cpumask_clear_cpu(me, data->old_domain);
> > +unlock:
> > + raw_spin_unlock(&desc->lock);
> > }
> >
> > raw_spin_unlock(&vector_lock);
> > - exiting_irq();
> > -}
> >
> > -static void __send_cleanup_vector(struct apic_chip_data *apicd)
> > -{
> > - unsigned int cpu;
> > -
> > - raw_spin_lock(&vector_lock);
> > - apicd->move_in_progress = 0;
> > - cpu = apicd->prev_cpu;
> > - if (cpu_online(cpu)) {
> > - hlist_add_head(&apicd->clist, per_cpu_ptr(&cleanup_list, cpu));
> > - apic->send_IPI(cpu, IRQ_MOVE_CLEANUP_VECTOR);
> > - } else {
> > - apicd->prev_vector = 0;
> > - }
> > - raw_spin_unlock(&vector_lock);
> > -}
> > -
> > -void send_cleanup_vector(struct irq_cfg *cfg)
> > -{
> > - struct apic_chip_data *apicd;
> > -
> > - apicd = container_of(cfg, struct apic_chip_data, hw_irq_cfg);
> > - if (apicd->move_in_progress)
> > - __send_cleanup_vector(apicd);
> > + exiting_irq();
> > }
> >
> > static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
> > {
> > - struct apic_chip_data *apicd;
> > + unsigned me;
> > + struct apic_chip_data *data;
> >
> > - apicd = container_of(cfg, struct apic_chip_data, hw_irq_cfg);
> > - if (likely(!apicd->move_in_progress))
> > + data = container_of(cfg, struct apic_chip_data, cfg);
> > + if (likely(!data->move_in_progress))
> > return;
> >
> > - if (vector == apicd->vector && apicd->cpu == smp_processor_id())
> > - __send_cleanup_vector(apicd);
> > + me = smp_processor_id();
> > + if (vector == data->cfg.vector && cpumask_test_cpu(me, data->domain))
> > + __send_cleanup_vector(data);
> > }
> >
> > void irq_complete_move(struct irq_cfg *cfg)
> > @@ -885,9 +681,10 @@ void irq_complete_move(struct irq_cfg *cfg)
> > */
> > void irq_force_complete_move(struct irq_desc *desc)
> > {
> > - struct apic_chip_data *apicd;
> > - struct irq_data *irqd;
> > - unsigned int vector;
> > + struct irq_data *irqdata;
> > + struct apic_chip_data *data;
> > + struct irq_cfg *cfg;
> > + unsigned int cpu;
> >
> > /*
> > * The function is called for all descriptors regardless of which
> > @@ -898,31 +695,43 @@ void irq_force_complete_move(struct irq_desc *desc)
> > * Check first that the chip_data is what we expect
> > * (apic_chip_data) before touching it any further.
> > */
> > - irqd = irq_domain_get_irq_data(x86_vector_domain,
> > - irq_desc_get_irq(desc));
> > - if (!irqd)
> > + irqdata = irq_domain_get_irq_data(x86_vector_domain,
> > + irq_desc_get_irq(desc));
> > + if (!irqdata)
> > return;
> >
> > - raw_spin_lock(&vector_lock);
> > - apicd = apic_chip_data(irqd);
> > - if (!apicd)
> > - goto unlock;
> > + data = apic_chip_data(irqdata);
> > + cfg = data ? &data->cfg : NULL;
> >
> > - /*
> > - * If prev_vector is empty, no action required.
> > - */
> > - vector = apicd->prev_vector;
> > - if (!vector)
> > - goto unlock;
> > + if (!cfg)
> > + return;
> >
> > /*
> > - * This is tricky. If the cleanup of the old vector has not been
> > + * This is tricky. If the cleanup of @data->old_domain has not been
> > * done yet, then the following setaffinity call will fail with
> > * -EBUSY. This can leave the interrupt in a stale state.
> > *
> > * All CPUs are stuck in stop machine with interrupts disabled so
> > * calling __irq_complete_move() would be completely pointless.
> > - *
> > + */
> > + raw_spin_lock(&vector_lock);
> > + /*
> > + * Clean out all offline cpus (including the outgoing one) from the
> > + * old_domain mask.
> > + */
> > + cpumask_and(data->old_domain, data->old_domain, cpu_online_mask);
> > +
> > + /*
> > + * If move_in_progress is cleared and the old_domain mask is empty,
> > + * then there is nothing to cleanup. fixup_irqs() will take care of
> > + * the stale vectors on the outgoing cpu.
> > + */
> > + if (!data->move_in_progress && cpumask_empty(data->old_domain)) {
> > + raw_spin_unlock(&vector_lock);
> > + return;
> > + }
> > +
> > + /*
> > * 1) The interrupt is in move_in_progress state. That means that we
> > * have not seen an interrupt since the io_apic was reprogrammed to
> > * the new vector.
> > @@ -930,7 +739,7 @@ void irq_force_complete_move(struct irq_desc *desc)
> > * 2) The interrupt has fired on the new vector, but the cleanup IPIs
> > * have not been processed yet.
> > */
> > - if (apicd->move_in_progress) {
> > + if (data->move_in_progress) {
> > /*
> > * In theory there is a race:
> > *
> > @@ -964,43 +773,21 @@ void irq_force_complete_move(struct irq_desc *desc)
> > * area arises.
> > */
> > pr_warn("IRQ fixup: irq %d move in progress, old vector %d\n",
> > - irqd->irq, vector);
> > + irqdata->irq, cfg->old_vector);
> > }
> > - free_moved_vector(apicd);
> > -unlock:
> > - raw_spin_unlock(&vector_lock);
> > -}
> > -
> > -#ifdef CONFIG_HOTPLUG_CPU
> > -/*
> > - * Note, this is not accurate accounting, but at least good enough to
> > - * prevent that the actual interrupt move will run out of vectors.
> > - */
> > -int lapic_can_unplug_cpu(void)
> > -{
> > - unsigned int rsvd, avl, tomove, cpu = smp_processor_id();
> > - int ret = 0;
> > + /*
> > + * If old_domain is not empty, then other cpus still have the irq
> > + * descriptor set in their vector array. Clean it up.
> > + */
> > + for_each_cpu(cpu, data->old_domain)
> > + per_cpu(vector_irq, cpu)[cfg->old_vector] = VECTOR_UNUSED;
> >
> > - raw_spin_lock(&vector_lock);
> > - tomove = irq_matrix_allocated(vector_matrix);
> > - avl = irq_matrix_available(vector_matrix, true);
> > - if (avl < tomove) {
> > - pr_warn("CPU %u has %u vectors, %u available. Cannot disable CPU\n",
> > - cpu, tomove, avl);
> > - ret = -ENOSPC;
> > - goto out;
> > - }
> > - rsvd = irq_matrix_reserved(vector_matrix);
> > - if (avl < rsvd) {
> > - pr_warn("Reserved vectors %u > available %u. IRQ request may fail\n",
> > - rsvd, avl);
> > - }
> > -out:
> > + /* Cleanup the left overs of the (half finished) move */
> > + cpumask_clear(data->old_domain);
> > + data->move_in_progress = 0;
> > raw_spin_unlock(&vector_lock);
> > - return ret;
> > }
> > -#endif /* HOTPLUG_CPU */
> > -#endif /* SMP */
> > +#endif
> >
> > static void __init print_APIC_field(int base)
> > {
> > diff --git a/arch/x86/kernel/apic/x2apic.h b/arch/x86/kernel/apic/x2apic.h
> > deleted file mode 100644
> > index b107de381cb5..000000000000
> > --- a/arch/x86/kernel/apic/x2apic.h
> > +++ /dev/null
> > @@ -1,9 +0,0 @@
> > -/* Common bits for X2APIC cluster/physical modes. */
> > -
> > -int x2apic_apic_id_valid(int apicid);
> > -int x2apic_apic_id_registered(void);
> > -void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest);
> > -unsigned int x2apic_get_apic_id(unsigned long id);
> > -u32 x2apic_set_apic_id(unsigned int id);
> > -int x2apic_phys_pkg_id(int initial_apicid, int index_msb);
> > -void x2apic_send_IPI_self(int vector);
> > diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
> > index 622f13ca8a94..e216cf3d64d2 100644
> > --- a/arch/x86/kernel/apic/x2apic_cluster.c
> > +++ b/arch/x86/kernel/apic/x2apic_cluster.c
> > @@ -9,24 +9,22 @@
> > #include <linux/cpu.h>
> >
> > #include <asm/smp.h>
> > -#include "x2apic.h"
> > -
> > -struct cluster_mask {
> > - unsigned int clusterid;
> > - int node;
> > - struct cpumask mask;
> > -};
> > +#include <asm/x2apic.h>
> >
> > static DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
> > +static DEFINE_PER_CPU(cpumask_var_t, cpus_in_cluster);
> > static DEFINE_PER_CPU(cpumask_var_t, ipi_mask);
> > -static DEFINE_PER_CPU(struct cluster_mask *, cluster_masks);
> > -static struct cluster_mask *cluster_hotplug_mask;
> >
> > static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
> > {
> > return x2apic_enabled();
> > }
> >
> > +static inline u32 x2apic_cluster(int cpu)
> > +{
> > + return per_cpu(x86_cpu_to_logical_apicid, cpu) >> 16;
> > +}
> > +
> > static void x2apic_send_IPI(int cpu, int vector)
> > {
> > u32 dest = per_cpu(x86_cpu_to_logical_apicid, cpu);
> > @@ -38,34 +36,49 @@ static void x2apic_send_IPI(int cpu, int vector)
> > static void
> > __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
> > {
> > - unsigned int cpu, clustercpu;
> > - struct cpumask *tmpmsk;
> > + struct cpumask *cpus_in_cluster_ptr;
> > + struct cpumask *ipi_mask_ptr;
> > + unsigned int cpu, this_cpu;
> > unsigned long flags;
> > u32 dest;
> >
> > x2apic_wrmsr_fence();
> > +
> > local_irq_save(flags);
> >
> > - tmpmsk = this_cpu_cpumask_var_ptr(ipi_mask);
> > - cpumask_copy(tmpmsk, mask);
> > - /* If IPI should not be sent to self, clear current CPU */
> > - if (apic_dest != APIC_DEST_ALLINC)
> > - cpumask_clear_cpu(smp_processor_id(), tmpmsk);
> > + this_cpu = smp_processor_id();
> >
> > - /* Collapse cpus in a cluster so a single IPI per cluster is sent */
> > - for_each_cpu(cpu, tmpmsk) {
> > - struct cluster_mask *cmsk = per_cpu(cluster_masks, cpu);
> > + /*
> > + * We are to modify mask, so we need an own copy
> > + * and be sure it's manipulated with irq off.
> > + */
> > + ipi_mask_ptr = this_cpu_cpumask_var_ptr(ipi_mask);
> > + cpumask_copy(ipi_mask_ptr, mask);
> > +
> > + /*
> > + * The idea is to send one IPI per cluster.
> > + */
> > + for_each_cpu(cpu, ipi_mask_ptr) {
> > + unsigned long i;
> >
> > + cpus_in_cluster_ptr = per_cpu(cpus_in_cluster, cpu);
> > dest = 0;
> > - for_each_cpu_and(clustercpu, tmpmsk, &cmsk->mask)
> > - dest |= per_cpu(x86_cpu_to_logical_apicid, clustercpu);
> > +
> > + /* Collect cpus in cluster. */
> > + for_each_cpu_and(i, ipi_mask_ptr, cpus_in_cluster_ptr) {
> > + if (apic_dest == APIC_DEST_ALLINC || i != this_cpu)
> > + dest |= per_cpu(x86_cpu_to_logical_apicid, i);
> > + }
> >
> > if (!dest)
> > continue;
> >
> > __x2apic_send_IPI_dest(dest, vector, apic->dest_logical);
> > - /* Remove cluster CPUs from tmpmask */
> > - cpumask_andnot(tmpmsk, tmpmsk, &cmsk->mask);
> > + /*
> > + * Cluster sibling cpus should be discared now so
> > + * we would not send IPI them second time.
> > + */
> > + cpumask_andnot(ipi_mask_ptr, ipi_mask_ptr, cpus_in_cluster_ptr);
> > }
> >
> > local_irq_restore(flags);
> > @@ -92,90 +105,125 @@ static void x2apic_send_IPI_all(int vector)
> > __x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
> > }
> >
> > -static u32 x2apic_calc_apicid(unsigned int cpu)
> > +static int
> > +x2apic_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqdata,
> > + unsigned int *apicid)
> > {
> > - return per_cpu(x86_cpu_to_logical_apicid, cpu);
> > -}
> > -
> > -static void init_x2apic_ldr(void)
> > -{
> > - struct cluster_mask *cmsk = this_cpu_read(cluster_masks);
> > - u32 cluster, apicid = apic_read(APIC_LDR);
> > + struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqdata);
> > unsigned int cpu;
> > + u32 dest = 0;
> > + u16 cluster;
> >
> > - this_cpu_write(x86_cpu_to_logical_apicid, apicid);
> > + cpu = cpumask_first(mask);
> > + if (cpu >= nr_cpu_ids)
> > + return -EINVAL;
> >
> > - if (cmsk)
> > - goto update;
> > + dest = per_cpu(x86_cpu_to_logical_apicid, cpu);
> > + cluster = x2apic_cluster(cpu);
> >
> > - cluster = apicid >> 16;
> > - for_each_online_cpu(cpu) {
> > - cmsk = per_cpu(cluster_masks, cpu);
> > - /* Matching cluster found. Link and update it. */
> > - if (cmsk && cmsk->clusterid == cluster)
> > - goto update;
> > + cpumask_clear(effmsk);
> > + for_each_cpu(cpu, mask) {
> > + if (cluster != x2apic_cluster(cpu))
> > + continue;
> > + dest |= per_cpu(x86_cpu_to_logical_apicid, cpu);
> > + cpumask_set_cpu(cpu, effmsk);
> > }
> > - cmsk = cluster_hotplug_mask;
> > - cluster_hotplug_mask = NULL;
> > -update:
> > - this_cpu_write(cluster_masks, cmsk);
> > - cpumask_set_cpu(smp_processor_id(), &cmsk->mask);
> > +
> > + *apicid = dest;
> > + return 0;
> > }
> >
> > -static int alloc_clustermask(unsigned int cpu, int node)
> > +static void init_x2apic_ldr(void)
> > {
> > - if (per_cpu(cluster_masks, cpu))
> > - return 0;
> > - /*
> > - * If a hotplug spare mask exists, check whether it's on the right
> > - * node. If not, free it and allocate a new one.
> > - */
> > - if (cluster_hotplug_mask) {
> > - if (cluster_hotplug_mask->node == node)
> > - return 0;
> > - kfree(cluster_hotplug_mask);
> > - }
> > + unsigned int this_cpu = smp_processor_id();
> > + unsigned int cpu;
> >
> > - cluster_hotplug_mask = kzalloc_node(sizeof(*cluster_hotplug_mask),
> > - GFP_KERNEL, node);
> > - if (!cluster_hotplug_mask)
> > - return -ENOMEM;
> > - cluster_hotplug_mask->node = node;
> > - return 0;
> > + per_cpu(x86_cpu_to_logical_apicid, this_cpu) = apic_read(APIC_LDR);
> > +
> > + cpumask_set_cpu(this_cpu, per_cpu(cpus_in_cluster, this_cpu));
> > + for_each_online_cpu(cpu) {
> > + if (x2apic_cluster(this_cpu) != x2apic_cluster(cpu))
> > + continue;
> > + cpumask_set_cpu(this_cpu, per_cpu(cpus_in_cluster, cpu));
> > + cpumask_set_cpu(cpu, per_cpu(cpus_in_cluster, this_cpu));
> > + }
> > }
> >
> > +/*
> > + * At CPU state changes, update the x2apic cluster sibling info.
> > + */
> > static int x2apic_prepare_cpu(unsigned int cpu)
> > {
> > - if (alloc_clustermask(cpu, cpu_to_node(cpu)) < 0)
> > + if (!zalloc_cpumask_var(&per_cpu(cpus_in_cluster, cpu), GFP_KERNEL))
> > return -ENOMEM;
> > - if (!zalloc_cpumask_var(&per_cpu(ipi_mask, cpu), GFP_KERNEL))
> > +
> > + if (!zalloc_cpumask_var(&per_cpu(ipi_mask, cpu), GFP_KERNEL)) {
> > + free_cpumask_var(per_cpu(cpus_in_cluster, cpu));
> > return -ENOMEM;
> > + }
> > +
> > return 0;
> > }
> >
> > -static int x2apic_dead_cpu(unsigned int dead_cpu)
> > +static int x2apic_dead_cpu(unsigned int this_cpu)
> > {
> > - struct cluster_mask *cmsk = per_cpu(cluster_masks, dead_cpu);
> > + int cpu;
> >
> > - cpumask_clear_cpu(dead_cpu, &cmsk->mask);
> > - free_cpumask_var(per_cpu(ipi_mask, dead_cpu));
> > + for_each_online_cpu(cpu) {
> > + if (x2apic_cluster(this_cpu) != x2apic_cluster(cpu))
> > + continue;
> > + cpumask_clear_cpu(this_cpu, per_cpu(cpus_in_cluster, cpu));
> > + cpumask_clear_cpu(cpu, per_cpu(cpus_in_cluster, this_cpu));
> > + }
> > + free_cpumask_var(per_cpu(cpus_in_cluster, this_cpu));
> > + free_cpumask_var(per_cpu(ipi_mask, this_cpu));
> > return 0;
> > }
> >
> > static int x2apic_cluster_probe(void)
> > {
> > + int cpu = smp_processor_id();
> > + int ret;
> > +
> > if (!x2apic_mode)
> > return 0;
> >
> > - if (cpuhp_setup_state(CPUHP_X2APIC_PREPARE, "x86/x2apic:prepare",
> > - x2apic_prepare_cpu, x2apic_dead_cpu) < 0) {
> > + ret = cpuhp_setup_state(CPUHP_X2APIC_PREPARE, "x86/x2apic:prepare",
> > + x2apic_prepare_cpu, x2apic_dead_cpu);
> > + if (ret < 0) {
> > pr_err("Failed to register X2APIC_PREPARE\n");
> > return 0;
> > }
> > - init_x2apic_ldr();
> > + cpumask_set_cpu(cpu, per_cpu(cpus_in_cluster, cpu));
> > return 1;
> > }
> >
> > +static const struct cpumask *x2apic_cluster_target_cpus(void)
> > +{
> > + return cpu_all_mask;
> > +}
> > +
> > +/*
> > + * Each x2apic cluster is an allocation domain.
> > + */
> > +static void cluster_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > + const struct cpumask *mask)
> > +{
> > + /*
> > + * To minimize vector pressure, default case of boot, device bringup
> > + * etc will use a single cpu for the interrupt destination.
> > + *
> > + * On explicit migration requests coming from irqbalance etc,
> > + * interrupts will be routed to the x2apic cluster (cluster-id
> > + * derived from the first cpu in the mask) members specified
> > + * in the mask.
> > + */
> > + if (mask == x2apic_cluster_target_cpus())
> > + cpumask_copy(retmask, cpumask_of(cpu));
> > + else
> > + cpumask_and(retmask, mask, per_cpu(cpus_in_cluster, cpu));
> > +}
> > +
> > static struct apic apic_x2apic_cluster __ro_after_init = {
> >
> > .name = "cluster x2apic",
> > @@ -187,10 +235,12 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
> > .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,
> >
> > + .vector_allocation_domain = cluster_vector_allocation_domain,
> > .init_apic_ldr = init_x2apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -203,7 +253,7 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
> > .get_apic_id = x2apic_get_apic_id,
> > .set_apic_id = x2apic_set_apic_id,
> >
> > - .calc_dest_apicid = x2apic_calc_apicid,
> > + .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid,
> >
> > .send_IPI = x2apic_send_IPI,
> > .send_IPI_mask = x2apic_send_IPI_mask,
> > diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
> > index f8d9d69994e6..b94d35320f85 100644
> > --- a/arch/x86/kernel/apic/x2apic_phys.c
> > +++ b/arch/x86/kernel/apic/x2apic_phys.c
> > @@ -7,8 +7,7 @@
> > #include <linux/dmar.h>
> >
> > #include <asm/smp.h>
> > -#include <asm/ipi.h>
> > -#include "x2apic.h"
> > +#include <asm/x2apic.h>
> >
> > int x2apic_phys;
> >
> > @@ -100,43 +99,6 @@ static int x2apic_phys_probe(void)
> > return apic == &apic_x2apic_phys;
> > }
> >
> > -/* Common x2apic functions, also used by x2apic_cluster */
> > -int x2apic_apic_id_valid(int apicid)
> > -{
> > - return 1;
> > -}
> > -
> > -int x2apic_apic_id_registered(void)
> > -{
> > - return 1;
> > -}
> > -
> > -void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
> > -{
> > - unsigned long cfg = __prepare_ICR(0, vector, dest);
> > - native_x2apic_icr_write(cfg, apicid);
> > -}
> > -
> > -unsigned int x2apic_get_apic_id(unsigned long id)
> > -{
> > - return id;
> > -}
> > -
> > -u32 x2apic_set_apic_id(unsigned int id)
> > -{
> > - return id;
> > -}
> > -
> > -int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
> > -{
> > - return initial_apicid >> index_msb;
> > -}
> > -
> > -void x2apic_send_IPI_self(int vector)
> > -{
> > - apic_write(APIC_SELF_IPI, vector);
> > -}
> > -
> > static struct apic apic_x2apic_phys __ro_after_init = {
> >
> > .name = "physical x2apic",
> > @@ -148,10 +110,12 @@ static struct apic apic_x2apic_phys __ro_after_init = {
> > .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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > .init_apic_ldr = init_x2apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -164,7 +128,7 @@ static struct apic apic_x2apic_phys __ro_after_init = {
> > .get_apic_id = x2apic_get_apic_id,
> > .set_apic_id = x2apic_set_apic_id,
> >
> > - .calc_dest_apicid = apic_default_calc_apicid,
> > + .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
> >
> > .send_IPI = x2apic_send_IPI,
> > .send_IPI_mask = x2apic_send_IPI_mask,
> > diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
> > index e1b8e8bf6b3c..2915c6d06821 100644
> > --- a/arch/x86/kernel/apic/x2apic_uv_x.c
> > +++ b/arch/x86/kernel/apic/x2apic_uv_x.c
> > @@ -568,9 +568,16 @@ static void uv_init_apic_ldr(void)
> > {
> > }
> >
> > -static u32 apic_uv_calc_apicid(unsigned int cpu)
> > +static int
> > +uv_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqdata,
> > + unsigned int *apicid)
> > {
> > - return apic_default_calc_apicid(cpu) | uv_apicid_hibits;
> > + int ret = default_cpu_mask_to_apicid(mask, irqdata, apicid);
> > +
> > + if (!ret)
> > + *apicid |= uv_apicid_hibits;
> > +
> > + return ret;
> > }
> >
> > static unsigned int x2apic_get_apic_id(unsigned long x)
> > @@ -583,7 +590,7 @@ static unsigned int x2apic_get_apic_id(unsigned long x)
> > return id;
> > }
> >
> > -static u32 set_apic_id(unsigned int id)
> > +static unsigned long set_apic_id(unsigned int id)
> > {
> > /* CHECKME: Do we need to mask out the xapic extra bits? */
> > return id;
> > @@ -620,10 +627,12 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
> > .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,
> >
> > + .vector_allocation_domain = default_vector_allocation_domain,
> > .init_apic_ldr = uv_init_apic_ldr,
> >
> > .ioapic_phys_id_map = NULL,
> > @@ -636,7 +645,7 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
> > .get_apic_id = x2apic_get_apic_id,
> > .set_apic_id = set_apic_id,
> >
> > - .calc_dest_apicid = apic_uv_calc_apicid,
> > + .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
> >
> > .send_IPI = uv_send_IPI_one,
> > .send_IPI_mask = uv_send_IPI_mask,
> > diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c
> > index 86c4439f9d74..8f5cb2c7060c 100644
> > --- a/arch/x86/kernel/i8259.c
> > +++ b/arch/x86/kernel/i8259.c
> > @@ -114,7 +114,6 @@ static void make_8259A_irq(unsigned int irq)
> > io_apic_irqs &= ~(1<<irq);
> > irq_set_chip_and_handler(irq, &i8259A_chip, handle_level_irq);
> > enable_irq(irq);
> > - lapic_assign_legacy_vector(irq, true);
> > }
> >
> > /*
> > diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
> > index d985cef3984f..014cb2fc47ff 100644
> > --- a/arch/x86/kernel/idt.c
> > +++ b/arch/x86/kernel/idt.c
> > @@ -223,7 +223,7 @@ idt_setup_from_table(gate_desc *idt, const struct idt_data *t, int size, bool sy
> > idt_init_desc(&desc, t);
> > write_idt_entry(idt, t->vector, &desc);
> > if (sys)
> > - set_bit(t->vector, system_vectors);
> > + set_bit(t->vector, used_vectors);
> > }
> > }
> >
> > @@ -311,14 +311,14 @@ void __init idt_setup_apic_and_irq_gates(void)
> >
> > idt_setup_from_table(idt_table, apic_idts, ARRAY_SIZE(apic_idts), true);
> >
> > - for_each_clear_bit_from(i, system_vectors, FIRST_SYSTEM_VECTOR) {
> > + for_each_clear_bit_from(i, used_vectors, FIRST_SYSTEM_VECTOR) {
> > entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR);
> > set_intr_gate(i, entry);
> > }
> >
> > - for_each_clear_bit_from(i, system_vectors, NR_VECTORS) {
> > + for_each_clear_bit_from(i, used_vectors, NR_VECTORS) {
> > #ifdef CONFIG_X86_LOCAL_APIC
> > - set_bit(i, system_vectors);
> > + set_bit(i, used_vectors);
> > set_intr_gate(i, spurious_interrupt);
> > #else
> > entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR);
> > @@ -356,7 +356,7 @@ void idt_invalidate(void *addr)
> >
> > void __init update_intr_gate(unsigned int n, const void *addr)
> > {
> > - if (WARN_ON_ONCE(!test_bit(n, system_vectors)))
> > + if (WARN_ON_ONCE(!test_bit(n, used_vectors)))
> > return;
> > set_intr_gate(n, addr);
> > }
> > @@ -364,6 +364,6 @@ void __init update_intr_gate(unsigned int n, const void *addr)
> > void alloc_intr_gate(unsigned int n, const void *addr)
> > {
> > BUG_ON(n < FIRST_SYSTEM_VECTOR);
> > - if (!test_and_set_bit(n, system_vectors))
> > + if (!test_and_set_bit(n, used_vectors))
> > set_intr_gate(n, addr);
> > }
> > diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
> > index 49cfd9fe7589..52089c043160 100644
> > --- a/arch/x86/kernel/irq.c
> > +++ b/arch/x86/kernel/irq.c
> > @@ -134,7 +134,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
> > seq_puts(p, " Machine check polls\n");
> > #endif
> > #if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
> > - if (test_bit(HYPERVISOR_CALLBACK_VECTOR, system_vectors)) {
> > + if (test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) {
> > seq_printf(p, "%*s: ", prec, "HYP");
> > for_each_online_cpu(j)
> > seq_printf(p, "%10u ",
> > @@ -333,6 +333,105 @@ __visible void smp_kvm_posted_intr_nested_ipi(struct pt_regs *regs)
> >
> >
> > #ifdef CONFIG_HOTPLUG_CPU
> > +
> > +/* These two declarations are only used in check_irq_vectors_for_cpu_disable()
> > + * below, which is protected by stop_machine(). Putting them on the stack
> > + * results in a stack frame overflow. Dynamically allocating could result in a
> > + * failure so declare these two cpumasks as global.
> > + */
> > +static struct cpumask affinity_new, online_new;
> > +
> > +/*
> > + * This cpu is going to be removed and its vectors migrated to the remaining
> > + * online cpus. Check to see if there are enough vectors in the remaining cpus.
> > + * This function is protected by stop_machine().
> > + */
> > +int check_irq_vectors_for_cpu_disable(void)
> > +{
> > + unsigned int this_cpu, vector, this_count, count;
> > + struct irq_desc *desc;
> > + struct irq_data *data;
> > + int cpu;
> > +
> > + this_cpu = smp_processor_id();
> > + cpumask_copy(&online_new, cpu_online_mask);
> > + cpumask_clear_cpu(this_cpu, &online_new);
> > +
> > + this_count = 0;
> > + for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
> > + desc = __this_cpu_read(vector_irq[vector]);
> > + if (IS_ERR_OR_NULL(desc))
> > + continue;
> > + /*
> > + * Protect against concurrent action removal, affinity
> > + * changes etc.
> > + */
> > + raw_spin_lock(&desc->lock);
> > + data = irq_desc_get_irq_data(desc);
> > + cpumask_copy(&affinity_new,
> > + irq_data_get_affinity_mask(data));
> > + cpumask_clear_cpu(this_cpu, &affinity_new);
> > +
> > + /* Do not count inactive or per-cpu irqs. */
> > + if (!irq_desc_has_action(desc) || irqd_is_per_cpu(data)) {
> > + raw_spin_unlock(&desc->lock);
> > + continue;
> > + }
> > +
> > + raw_spin_unlock(&desc->lock);
> > + /*
> > + * A single irq may be mapped to multiple cpu's
> > + * vector_irq[] (for example IOAPIC cluster mode). In
> > + * this case we have two possibilities:
> > + *
> > + * 1) the resulting affinity mask is empty; that is
> > + * this the down'd cpu is the last cpu in the irq's
> > + * affinity mask, or
> > + *
> > + * 2) the resulting affinity mask is no longer a
> > + * subset of the online cpus but the affinity mask is
> > + * not zero; that is the down'd cpu is the last online
> > + * cpu in a user set affinity mask.
> > + */
> > + if (cpumask_empty(&affinity_new) ||
> > + !cpumask_subset(&affinity_new, &online_new))
> > + this_count++;
> > + }
> > + /* No need to check any further. */
> > + if (!this_count)
> > + return 0;
> > +
> > + count = 0;
> > + for_each_online_cpu(cpu) {
> > + if (cpu == this_cpu)
> > + continue;
> > + /*
> > + * We scan from FIRST_EXTERNAL_VECTOR to first system
> > + * vector. If the vector is marked in the used vectors
> > + * bitmap or an irq is assigned to it, we don't count
> > + * it as available.
> > + *
> > + * As this is an inaccurate snapshot anyway, we can do
> > + * this w/o holding vector_lock.
> > + */
> > + for (vector = FIRST_EXTERNAL_VECTOR;
> > + vector < FIRST_SYSTEM_VECTOR; vector++) {
> > + if (!test_bit(vector, used_vectors) &&
> > + IS_ERR_OR_NULL(per_cpu(vector_irq, cpu)[vector])) {
> > + if (++count == this_count)
> > + return 0;
> > + }
> > + }
> > + }
> > +
> > + if (count < this_count) {
> > + pr_warn("CPU %d disable failed: CPU has %u vectors assigned and there are only %u available.\n",
> > + this_cpu, this_count, count);
> > + return -ERANGE;
> > + }
> > + return 0;
> > +}
> > +
> > /* A cpu has been removed from cpu_online_mask. Reset irq affinities. */
> > void fixup_irqs(void)
> > {
> > diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
> > index 8da3e909e967..1e4094eba15e 100644
> > --- a/arch/x86/kernel/irqinit.c
> > +++ b/arch/x86/kernel/irqinit.c
> > @@ -61,6 +61,9 @@ void __init init_ISA_irqs(void)
> > struct irq_chip *chip = legacy_pic->chip;
> > int i;
> >
> > +#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
> > + init_bsp_APIC();
> > +#endif
> > legacy_pic->init(0);
> >
> > for (i = 0; i < nr_legacy_irqs(); i++)
> > @@ -91,7 +94,6 @@ void __init native_init_IRQ(void)
> > x86_init.irqs.pre_vector_init();
> >
> > idt_setup_apic_and_irq_gates();
> > - lapic_assign_system_vectors();
> >
> > if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
> > setup_irq(2, &irq2);
> > diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> > index 8af2e8d0c0a1..be33a5c63d20 100644
> > --- a/arch/x86/kernel/setup.c
> > +++ b/arch/x86/kernel/setup.c
> > @@ -136,6 +136,18 @@ RESERVE_BRK(dmi_alloc, 65536);
> > static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
> > unsigned long _brk_end = (unsigned long)__brk_base;
> >
> > +#ifdef CONFIG_X86_64
> > +int default_cpu_present_to_apicid(int mps_cpu)
> > +{
> > + return __default_cpu_present_to_apicid(mps_cpu);
> > +}
> > +
> > +int default_check_phys_apicid_present(int phys_apicid)
> > +{
> > + return __default_check_phys_apicid_present(phys_apicid);
> > +}
> > +#endif
> > +
> > struct boot_params boot_params;
> >
> > /*
> > diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
> > index 3d01df7d7cf6..13bd986b7f90 100644
> > --- a/arch/x86/kernel/smpboot.c
> > +++ b/arch/x86/kernel/smpboot.c
> > @@ -253,14 +253,14 @@ static void notrace start_secondary(void *unused)
> > check_tsc_sync_target();
> >
> > /*
> > - * Lock vector_lock, set CPU online and bring the vector
> > - * allocator online. Online must be set with vector_lock held
> > - * to prevent a concurrent irq setup/teardown from seeing a
> > - * half valid vector space.
> > + * Lock vector_lock and initialize the vectors on this cpu
> > + * before setting the cpu online. We must set it online with
> > + * vector_lock held to prevent a concurrent setup/teardown
> > + * from seeing a half valid vector space.
> > */
> > lock_vector_lock();
> > + setup_vector_irq(smp_processor_id());
> > set_cpu_online(smp_processor_id(), true);
> > - lapic_online();
> > unlock_vector_lock();
> > cpu_set_state_online(smp_processor_id());
> > x86_platform.nmi_init();
> > @@ -1132,10 +1132,17 @@ static __init void disable_smp(void)
> > cpumask_set_cpu(0, topology_core_cpumask(0));
> > }
> >
> > +enum {
> > + SMP_OK,
> > + SMP_NO_CONFIG,
> > + SMP_NO_APIC,
> > + SMP_FORCE_UP,
> > +};
> > +
> > /*
> > * Various sanity checks.
> > */
> > -static void __init smp_sanity_check(void)
> > +static int __init smp_sanity_check(unsigned max_cpus)
> > {
> > preempt_disable();
> >
> > @@ -1172,6 +1179,16 @@ static void __init smp_sanity_check(void)
> > physid_set(hard_smp_processor_id(), phys_cpu_present_map);
> > }
> >
> > + /*
> > + * If we couldn't find an SMP configuration at boot time,
> > + * get out of here now!
> > + */
> > + if (!smp_found_config && !acpi_lapic) {
> > + preempt_enable();
> > + pr_notice("SMP motherboard not detected\n");
> > + return SMP_NO_CONFIG;
> > + }
> > +
> > /*
> > * Should not be necessary because the MP table should list the boot
> > * CPU too, but we do it for the sake of robustness anyway.
> > @@ -1182,6 +1199,29 @@ static void __init smp_sanity_check(void)
> > physid_set(hard_smp_processor_id(), phys_cpu_present_map);
> > }
> > preempt_enable();
> > +
> > + /*
> > + * If we couldn't find a local APIC, then get out of here now!
> > + */
> > + if (APIC_INTEGRATED(boot_cpu_apic_version) &&
> > + !boot_cpu_has(X86_FEATURE_APIC)) {
> > + if (!disable_apic) {
> > + pr_err("BIOS bug, local APIC #%d not detected!...\n",
> > + boot_cpu_physical_apicid);
> > + pr_err("... forcing use of dummy APIC emulation (tell your hw vendor)\n");
> > + }
> > + return SMP_NO_APIC;
> > + }
> > +
> > + /*
> > + * If SMP should be disabled, then really disable it!
> > + */
> > + if (!max_cpus) {
> > + pr_info("SMP mode deactivated\n");
> > + return SMP_FORCE_UP;
> > + }
> > +
> > + return SMP_OK;
> > }
> >
> > static void __init smp_cpu_index_default(void)
> > @@ -1196,18 +1236,9 @@ static void __init smp_cpu_index_default(void)
> > }
> > }
> >
> > -static void __init smp_get_logical_apicid(void)
> > -{
> > - if (x2apic_mode)
> > - cpu0_logical_apicid = apic_read(APIC_LDR);
> > - else
> > - cpu0_logical_apicid = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
> > -}
> > -
> > /*
> > - * Prepare for SMP bootup.
> > - * @max_cpus: configured maximum number of CPUs, It is a legacy parameter
> > - * for common interface support.
> > + * Prepare for SMP bootup. The MP table or ACPI has been read
> > + * earlier. Just do some sanity checking here and enable APIC mode.
> > */
> > void __init native_smp_prepare_cpus(unsigned int max_cpus)
> > {
> > @@ -1239,27 +1270,31 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
> >
> > set_cpu_sibling_map(0);
> >
> > - smp_sanity_check();
> > -
> > - switch (apic_intr_mode) {
> > - case APIC_PIC:
> > - case APIC_VIRTUAL_WIRE_NO_CONFIG:
> > + switch (smp_sanity_check(max_cpus)) {
> > + case SMP_NO_CONFIG:
> > disable_smp();
> > + if (APIC_init_uniprocessor())
> > + pr_notice("Local APIC not detected. Using dummy APIC emulation.\n");
> > return;
> > - case APIC_SYMMETRIC_IO_NO_ROUTING:
> > + case SMP_NO_APIC:
> > disable_smp();
> > - /* Setup local timer */
> > - x86_init.timers.setup_percpu_clockev();
> > return;
> > - case APIC_VIRTUAL_WIRE:
> > - case APIC_SYMMETRIC_IO:
> > + case SMP_FORCE_UP:
> > + disable_smp();
> > + apic_bsp_setup(false);
> > + return;
> > + case SMP_OK:
> > break;
> > }
> >
> > - /* Setup local timer */
> > - x86_init.timers.setup_percpu_clockev();
> > + if (read_apic_id() != boot_cpu_physical_apicid) {
> > + panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
> > + read_apic_id(), boot_cpu_physical_apicid);
> > + /* Or can we switch back to PIC here? */
> > + }
> >
> > - smp_get_logical_apicid();
> > + default_setup_apic_routing();
> > + cpu0_logical_apicid = apic_bsp_setup(false);
> >
> > pr_info("CPU0: ");
> > print_cpu_info(&cpu_data(0));
> > @@ -1313,6 +1348,7 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
> >
> > nmi_selftest();
> > impress_friends();
> > + setup_ioapic_dest();
> > mtrr_aps_init();
> > }
> >
> > @@ -1471,14 +1507,13 @@ void cpu_disable_common(void)
> > remove_cpu_from_maps(cpu);
> > unlock_vector_lock();
> > fixup_irqs();
> > - lapic_offline();
> > }
> >
> > int native_cpu_disable(void)
> > {
> > int ret;
> >
> > - ret = lapic_can_unplug_cpu();
> > + ret = check_irq_vectors_for_cpu_disable();
> > if (ret)
> > return ret;
> >
> > diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
> > index 749d189f8cd4..879af864d99a 100644
> > --- a/arch/x86/kernel/time.c
> > +++ b/arch/x86/kernel/time.c
> > @@ -85,11 +85,6 @@ void __init hpet_time_init(void)
> > static __init void x86_late_time_init(void)
> > {
> > x86_init.timers.timer_init();
> > - /*
> > - * After PIT/HPET timers init, select and setup
> > - * the final interrupt mode for delivering IRQs.
> > - */
> > - x86_init.irqs.intr_mode_init();
> > tsc_init();
> > }
> >
> > diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
> > index 989514c94a55..4e2eb01cb3bf 100644
> > --- a/arch/x86/kernel/traps.c
> > +++ b/arch/x86/kernel/traps.c
> > @@ -71,7 +71,7 @@
> > #include <asm/proto.h>
> > #endif
> >
> > -DECLARE_BITMAP(system_vectors, NR_VECTORS);
> > +DECLARE_BITMAP(used_vectors, NR_VECTORS);
> >
> > static inline void cond_local_irq_enable(struct pt_regs *regs)
> > {
> > diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
> > index 44685fb2a192..b034b1b14b9c 100644
> > --- a/arch/x86/kernel/vsmp_64.c
> > +++ b/arch/x86/kernel/vsmp_64.c
> > @@ -26,6 +26,9 @@
> >
> > #define TOPOLOGY_REGISTER_OFFSET 0x10
> >
> > +/* Flag below is initialized once during vSMP PCI initialization. */
> > +static int irq_routing_comply = 1;
> > +
> > #if defined CONFIG_PCI && defined CONFIG_PARAVIRT
> > /*
> > * Interrupt control on vSMPowered systems:
> > @@ -102,6 +105,9 @@ static void __init set_vsmp_pv_ops(void)
> > if (cap & ctl & BIT(8)) {
> > ctl &= ~BIT(8);
> >
> > + /* Interrupt routing set to ignore */
> > + irq_routing_comply = 0;
> > +
> > #ifdef CONFIG_PROC_FS
> > /* Don't let users change irq affinity via procfs */
> > no_irq_affinity = 1;
> > @@ -205,10 +211,23 @@ static int apicid_phys_pkg_id(int initial_apic_id, int index_msb)
> > return hard_smp_processor_id() >> index_msb;
> > }
> >
> > +/*
> > + * In vSMP, all cpus should be capable of handling interrupts, regardless of
> > + * the APIC used.
> > + */
> > +static void fill_vector_allocation_domain(int cpu, struct cpumask *retmask,
> > + const struct cpumask *mask)
> > +{
> > + cpumask_setall(retmask);
> > +}
> > +
> > static void vsmp_apic_post_init(void)
> > {
> > /* need to update phys_pkg_id */
> > apic->phys_pkg_id = apicid_phys_pkg_id;
> > +
> > + if (!irq_routing_comply)
> > + apic->vector_allocation_domain = fill_vector_allocation_domain;
> > }
> >
> > void __init vsmp_init(void)
> > diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
> > index 1151ccd72ce9..c8fa4cd31903 100644
> > --- a/arch/x86/kernel/x86_init.c
> > +++ b/arch/x86/kernel/x86_init.c
> > @@ -57,7 +57,6 @@ struct x86_init_ops x86_init __initdata = {
> > .pre_vector_init = init_ISA_irqs,
> > .intr_init = native_init_IRQ,
> > .trap_init = x86_init_noop,
> > - .intr_mode_init = apic_intr_mode_init
> > },
> >
> > .oem = {
> > diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
> > index 6b830d4cb4c8..30434b8708f2 100644
> > --- a/arch/x86/xen/apic.c
> > +++ b/arch/x86/xen/apic.c
> > @@ -31,7 +31,7 @@ static unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
> > return 0xfd;
> > }
> >
> > -static u32 xen_set_apic_id(unsigned int x)
> > +static unsigned long xen_set_apic_id(unsigned int x)
> > {
> > WARN_ON(1);
> > return x;
> > @@ -161,10 +161,12 @@ 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 */
> >
> > + .vector_allocation_domain = flat_vector_allocation_domain,
> > .init_apic_ldr = xen_noop, /* setup_local_APIC calls it */
> >
> > .ioapic_phys_id_map = default_ioapic_phys_id_map, /* Used on 32-bit */
> > @@ -177,7 +179,7 @@ static struct apic xen_pv_apic = {
> > .get_apic_id = xen_get_apic_id,
> > .set_apic_id = xen_set_apic_id, /* Can be NULL on 32-bit. */
> >
> > - .calc_dest_apicid = apic_flat_calc_apicid,
> > + .cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
> >
> > #ifdef CONFIG_SMP
> > .send_IPI_mask = xen_send_IPI_mask,
> > diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
> > index 5b2b3f3f6531..fbd054d6ac97 100644
> > --- a/arch/x86/xen/enlighten_pv.c
> > +++ b/arch/x86/xen/enlighten_pv.c
> > @@ -1230,7 +1230,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
> > x86_platform.get_nmi_reason = xen_get_nmi_reason;
> >
> > x86_init.resources.memory_setup = xen_memory_setup;
> > - x86_init.irqs.intr_mode_init = x86_init_noop;
> > x86_init.oem.arch_setup = xen_arch_setup;
> > x86_init.oem.banner = xen_banner;
> >
> > diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
> > index 7d5eb004091d..e2a739001c8a 100644
> > --- a/drivers/iommu/amd_iommu.c
> > +++ b/drivers/iommu/amd_iommu.c
> > @@ -4178,25 +4178,16 @@ static void irq_remapping_free(struct irq_domain *domain, unsigned int virq,
> > irq_domain_free_irqs_common(domain, virq, nr_irqs);
> > }
> >
> > -static void amd_ir_update_irte(struct irq_data *irqd, struct amd_iommu *iommu,
> > - struct amd_ir_data *ir_data,
> > - struct irq_2_irte *irte_info,
> > - struct irq_cfg *cfg);
> > -
> > static int irq_remapping_activate(struct irq_domain *domain,
> > struct irq_data *irq_data, bool early)
> > {
> > struct amd_ir_data *data = irq_data->chip_data;
> > struct irq_2_irte *irte_info = &data->irq_2_irte;
> > struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
> > - struct irq_cfg *cfg = irqd_cfg(irq_data);
> > -
> > - if (!iommu)
> > - return 0;
> >
> > - iommu->irte_ops->activate(data->entry, irte_info->devid,
> > - irte_info->index);
> > - amd_ir_update_irte(irq_data, iommu, data, irte_info, cfg);
> > + if (iommu)
> > + iommu->irte_ops->activate(data->entry, irte_info->devid,
> > + irte_info->index);
> > return 0;
> > }
> >
> > @@ -4284,22 +4275,6 @@ static int amd_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info)
> > return modify_irte_ga(irte_info->devid, irte_info->index, irte, ir_data);
> > }
> >
> > -
> > -static void amd_ir_update_irte(struct irq_data *irqd, struct amd_iommu *iommu,
> > - struct amd_ir_data *ir_data,
> > - struct irq_2_irte *irte_info,
> > - struct irq_cfg *cfg)
> > -{
> > -
> > - /*
> > - * Atomically updates the IRTE with the new destination, vector
> > - * and flushes the interrupt entry cache.
> > - */
> > - iommu->irte_ops->set_affinity(ir_data->entry, irte_info->devid,
> > - irte_info->index, cfg->vector,
> > - cfg->dest_apicid);
> > -}
> > -
> > static int amd_ir_set_affinity(struct irq_data *data,
> > const struct cpumask *mask, bool force)
> > {
> > @@ -4317,7 +4292,13 @@ static int amd_ir_set_affinity(struct irq_data *data,
> > if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE)
> > return ret;
> >
> > - amd_ir_update_irte(data, iommu, ir_data, irte_info, cfg);
> > + /*
> > + * Atomically updates the IRTE with the new destination, vector
> > + * and flushes the interrupt entry cache.
> > + */
> > + iommu->irte_ops->set_affinity(ir_data->entry, irte_info->devid,
> > + irte_info->index, cfg->vector, cfg->dest_apicid);
> > +
> > /*
> > * After this point, all the interrupts will start arriving
> > * at the new destination. So, time to cleanup the previous
> > diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> > index 76a193c7fcfc..324163330eaa 100644
> > --- a/drivers/iommu/intel_irq_remapping.c
> > +++ b/drivers/iommu/intel_irq_remapping.c
> > @@ -1122,24 +1122,6 @@ struct irq_remap_ops intel_irq_remap_ops = {
> > .get_irq_domain = intel_get_irq_domain,
> > };
> >
> > -static void intel_ir_reconfigure_irte(struct irq_data *irqd, bool force)
> > -{
> > - struct intel_ir_data *ir_data = irqd->chip_data;
> > - struct irte *irte = &ir_data->irte_entry;
> > - struct irq_cfg *cfg = irqd_cfg(irqd);
> > -
> > - /*
> > - * Atomically updates the IRTE with the new destination, vector
> > - * and flushes the interrupt entry cache.
> > - */
> > - irte->vector = cfg->vector;
> > - irte->dest_id = IRTE_DEST(cfg->dest_apicid);
> > -
> > - /* Update the hardware only if the interrupt is in remapped mode. */
> > - if (!force || ir_data->irq_2_iommu.mode == IRQ_REMAPPING)
> > - modify_irte(&ir_data->irq_2_iommu, irte);
> > -}
> > -
> > /*
> > * Migrate the IO-APIC irq in the presence of intr-remapping.
> > *
> > @@ -1158,15 +1140,27 @@ static int
> > intel_ir_set_affinity(struct irq_data *data, const struct cpumask *mask,
> > bool force)
> > {
> > - struct irq_data *parent = data->parent_data;
> > + struct intel_ir_data *ir_data = data->chip_data;
> > + struct irte *irte = &ir_data->irte_entry;
> > struct irq_cfg *cfg = irqd_cfg(data);
> > + struct irq_data *parent = data->parent_data;
> > int ret;
> >
> > ret = parent->chip->irq_set_affinity(parent, mask, force);
> > if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE)
> > return ret;
> >
> > - intel_ir_reconfigure_irte(data, false);
> > + /*
> > + * Atomically updates the IRTE with the new destination, vector
> > + * and flushes the interrupt entry cache.
> > + */
> > + irte->vector = cfg->vector;
> > + irte->dest_id = IRTE_DEST(cfg->dest_apicid);
> > +
> > + /* Update the hardware only if the interrupt is in remapped mode. */
> > + if (ir_data->irq_2_iommu.mode == IRQ_REMAPPING)
> > + modify_irte(&ir_data->irq_2_iommu, irte);
> > +
> > /*
> > * After this point, all the interrupts will start arriving
> > * at the new destination. So, time to cleanup the previous
> > @@ -1399,7 +1393,9 @@ static void intel_irq_remapping_free(struct irq_domain *domain,
> > static int intel_irq_remapping_activate(struct irq_domain *domain,
> > struct irq_data *irq_data, bool early)
> > {
> > - intel_ir_reconfigure_irte(irq_data, true);
> > + struct intel_ir_data *data = irq_data->chip_data;
> > +
> > + modify_irte(&data->irq_2_iommu, &data->irte_entry);
> > return 0;
> > }
> >
> > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> > index e06607167858..496ed9130600 100644
> > --- a/drivers/pci/msi.c
> > +++ b/drivers/pci/msi.c
> > @@ -1441,8 +1441,6 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
> > pci_msi_domain_update_chip_ops(info);
> >
> > info->flags |= MSI_FLAG_ACTIVATE_EARLY;
> > - if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
> > - info->flags |= MSI_FLAG_MUST_REACTIVATE;
> >
> > domain = msi_create_irq_domain(fwnode, info, parent);
> > if (!domain)
> > diff --git a/init/main.c b/init/main.c
> > index dfec3809e740..642b88bd3c9b 100644
> > --- a/init/main.c
> > +++ b/init/main.c
> > @@ -664,12 +664,12 @@ asmlinkage __visible void __init start_kernel(void)
> > debug_objects_mem_init();
> > setup_per_cpu_pageset();
> > numa_policy_init();
> > - acpi_early_init();
> > if (late_time_init)
> > late_time_init();
> > calibrate_delay();
> > pid_idr_init();
> > anon_vma_init();
> > + acpi_early_init();
> > #ifdef CONFIG_X86
> > if (efi_enabled(EFI_RUNTIME_SERVICES))
> > efi_enter_virtual_mode();
> > diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
> > index 89e355866450..ac1a3e29d3b9 100644
> > --- a/kernel/irq/Kconfig
> > +++ b/kernel/irq/Kconfig
> > @@ -100,9 +100,6 @@ config IRQ_TIMINGS
> > config GENERIC_IRQ_MATRIX_ALLOCATOR
> > bool
> >
> > -config GENERIC_IRQ_RESERVATION_MODE
> > - bool
> > -
> > config IRQ_DOMAIN_DEBUG
> > bool "Expose hardware/virtual IRQ mapping via debugfs"
> > depends on IRQ_DOMAIN && DEBUG_FS
> > --
> > 2.15.0
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx