Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/lin…

…ux/kernel/git/tip/tip

Pull x86 apic updates from Thomas Gleixner:

 - Cleanup the apic IPI implementation by removing duplicated code and
   consolidating the functions into the APIC core.

 - Implement a safe variant of the IPI broadcast mode. Contrary to
   earlier attempts this uses the core tracking of which CPUs have been
   brought online at least once so that a broadcast does not end up in
   some dead end in BIOS/SMM code when the CPU is still waiting for
   init. Once all CPUs have been brought up once, IPI broadcasting is
   enabled. Before that regular one by one IPIs are issued.

 - Drop the paravirt CR8 related functions as they have no user anymore

 - Initialize the APIC TPR to block interrupt 16-31 as they are reserved
   for CPU exceptions and should never be raised by any well behaving
   device.

 - Emit a warning when vector space exhaustion breaks the admin set
   affinity of an interrupt.

 - Make sure to use the NMI fallback when shutdown via reboot vector IPI
   fails. The original code had conditions which prevent the code path
   to be reached.

 - Annotate various APIC config variables as RO after init.

[ The ipi broadcase change came in earlier through the cpu hotplug
  branch, but I left the explanation in the commit message since it was
  shared between the two different branches    - Linus ]

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits)
  x86/apic/vector: Warn when vector space exhaustion breaks affinity
  x86/apic: Annotate global config variables as "read-only after init"
  x86/apic/x2apic: Implement IPI shorthands support
  x86/apic/flat64: Remove the IPI shorthand decision logic
  x86/apic: Share common IPI helpers
  x86/apic: Remove the shorthand decision logic
  x86/smp: Enhance native_send_call_func_ipi()
  x86/smp: Move smp_function_call implementations into IPI code
  x86/apic: Provide and use helper for send_IPI_allbutself()
  x86/apic: Add static key to Control IPI shorthands
  x86/apic: Move no_ipi_broadcast() out of 32bit
  x86/apic: Add NMI_VECTOR wait to IPI shorthand
  x86/apic: Remove dest argument from __default_send_IPI_shortcut()
  x86/hotplug: Silence APIC and NMI when CPU is dead
  x86/cpu: Move arch_smt_update() to a neutral place
  x86/apic/uv: Make x2apic_extra_bits static
  x86/apic: Consolidate the apic local headers
  x86/apic: Move apic_flat_64 header into apic directory
  x86/apic: Move ipi header into apic directory
  x86/apic: Cleanup the include maze
  ...

arch/x86/include/asm/apic.h

@@ -136,6 +136,7 @@ extern int lapic_get_maxlvt(void);
 extern void clear_local_APIC(void);
 extern void disconnect_bsp_APIC(int virt_wire_setup);
 extern void disable_local_APIC(void);
+extern void apic_soft_disable(void);
 extern void lapic_shutdown(void);
 extern void sync_Arb_IDs(void);
 extern void init_bsp_APIC(void);
@@ -176,6 +177,8 @@ extern void lapic_online(void);
 extern void lapic_offline(void);
 extern bool apic_needs_pit(void);
 
+extern void apic_send_IPI_allbutself(unsigned int vector);
+
 #else /* !CONFIG_X86_LOCAL_APIC */
 static inline void lapic_shutdown(void) { }
 #define local_apic_timer_c2_ok		1
@@ -465,12 +468,6 @@ static inline unsigned default_get_apic_id(unsigned long x)
 #define TRAMPOLINE_PHYS_LOW		0x467
 #define TRAMPOLINE_PHYS_HIGH		0x469
 
-#ifdef CONFIG_X86_64
-extern void apic_send_IPI_self(int vector);
-
-DECLARE_PER_CPU(int, x2apic_extra_bits);
-#endif
-
 extern void generic_bigsmp_probe(void);
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -506,8 +503,10 @@ extern int default_check_phys_apicid_present(int phys_apicid);
 
 #ifdef CONFIG_SMP
 bool apic_id_is_primary_thread(unsigned int id);
+void apic_smt_update(void);
 #else
 static inline bool apic_id_is_primary_thread(unsigned int id) { return false; }
+static inline void apic_smt_update(void) { }
 #endif
 
 extern void irq_enter(void);

arch/x86/include/asm/bugs.h

@@ -18,4 +18,6 @@ int ppro_with_ram_bug(void);
 static inline int ppro_with_ram_bug(void) { return 0; }
 #endif
 
+extern void cpu_bugs_smt_update(void);
+
 #endif /* _ASM_X86_BUGS_H */

arch/x86/include/asm/paravirt.h

@@ -139,18 +139,6 @@ static inline void __write_cr4(unsigned long x)
 	PVOP_VCALL1(cpu.write_cr4, x);
 }
 
-#ifdef CONFIG_X86_64
-static inline unsigned long read_cr8(void)
-{
-	return PVOP_CALL0(unsigned long, cpu.read_cr8);
-}
-
-static inline void write_cr8(unsigned long x)
-{
-	PVOP_VCALL1(cpu.write_cr8, x);
-}
-#endif
-
 static inline void arch_safe_halt(void)
 {
 	PVOP_VCALL0(irq.safe_halt);

arch/x86/include/asm/paravirt_types.h

@@ -119,11 +119,6 @@ struct pv_cpu_ops {
 
 	void (*write_cr4)(unsigned long);
 
-#ifdef CONFIG_X86_64
-	unsigned long (*read_cr8)(void);
-	void (*write_cr8)(unsigned long);
-#endif
-
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
 	void (*load_gdt)(const struct desc_ptr *);

arch/x86/include/asm/smp.h

@@ -143,6 +143,7 @@ void play_dead_common(void);
 void wbinvd_on_cpu(int cpu);
 int wbinvd_on_all_cpus(void);
 
+void native_smp_send_reschedule(int cpu);
 void native_send_call_func_ipi(const struct cpumask *mask);
 void native_send_call_func_single_ipi(int cpu);
 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);

arch/x86/include/asm/special_insns.h

@@ -73,20 +73,6 @@ static inline unsigned long native_read_cr4(void)
 
 void native_write_cr4(unsigned long val);
 
-#ifdef CONFIG_X86_64
-static inline unsigned long native_read_cr8(void)
-{
-	unsigned long cr8;
-	asm volatile("movq %%cr8,%0" : "=r" (cr8));
-	return cr8;
-}
-
-static inline void native_write_cr8(unsigned long val)
-{
-	asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
-}
-#endif
-
 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
 static inline u32 rdpkru(void)
 {
@@ -200,16 +186,6 @@ static inline void wbinvd(void)
 
 #ifdef CONFIG_X86_64
 
-static inline unsigned long read_cr8(void)
-{
-	return native_read_cr8();
-}
-
-static inline void write_cr8(unsigned long x)
-{
-	native_write_cr8(x);
-}
-
 static inline void load_gs_index(unsigned selector)
 {
 	native_load_gs_index(selector);

arch/x86/include/asm/suspend_64.h

@@ -34,7 +34,7 @@ struct saved_context {
 	 */
 	unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
 
-	unsigned long cr0, cr2, cr3, cr4, cr8;
+	unsigned long cr0, cr2, cr3, cr4;
 	u64 misc_enable;
 	bool misc_enable_saved;
 	struct saved_msrs saved_msrs;