forked from Minki/linux
df1be4372e
I tested tip/master and found an issue (patch attached) for x2apic support. This is not because of the recent merges we had, but because of something(where we still access memory based interface after enabling x2apic mode) that slipped through my earlier tests. Probably it is a good idea to unmap the memory mapped interface, once we switch to x2apic mode. That will catch the issues much earlier. I will post another patch for this. ack_APIC_irq() is used at too many generic places (and not just during irq_chip handling!) to use the native_apic_mem_write(). For ex, this will break x2apic based systems. Fix ack_APIC_irq() to use the generic apic_write() even for 64-bit. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: suresh.b.siddha@intel.com Cc: yong.y.wang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
185 lines
4.3 KiB
C
185 lines
4.3 KiB
C
#ifndef _ASM_X86_APIC_H
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#define _ASM_X86_APIC_H
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#include <linux/pm.h>
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#include <linux/delay.h>
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#include <asm/alternative.h>
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#include <asm/fixmap.h>
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#include <asm/apicdef.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/cpufeature.h>
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#include <asm/msr.h>
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#define ARCH_APICTIMER_STOPS_ON_C3 1
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/*
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* Debugging macros
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*/
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#define APIC_QUIET 0
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#define APIC_VERBOSE 1
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#define APIC_DEBUG 2
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/*
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* Define the default level of output to be very little
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* This can be turned up by using apic=verbose for more
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* information and apic=debug for _lots_ of information.
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* apic_verbosity is defined in apic.c
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*/
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#define apic_printk(v, s, a...) do { \
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if ((v) <= apic_verbosity) \
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printk(s, ##a); \
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} while (0)
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extern void generic_apic_probe(void);
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#ifdef CONFIG_X86_LOCAL_APIC
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extern unsigned int apic_verbosity;
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extern int local_apic_timer_c2_ok;
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extern int ioapic_force;
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extern int disable_apic;
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/*
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* Basic functions accessing APICs.
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*/
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else
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#define setup_boot_clock setup_boot_APIC_clock
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#define setup_secondary_clock setup_secondary_APIC_clock
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#endif
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extern int is_vsmp_box(void);
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static inline void native_apic_mem_write(u32 reg, u32 v)
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{
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volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
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alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
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ASM_OUTPUT2("=r" (v), "=m" (*addr)),
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ASM_OUTPUT2("0" (v), "m" (*addr)));
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}
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static inline u32 native_apic_mem_read(u32 reg)
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{
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return *((volatile u32 *)(APIC_BASE + reg));
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}
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static inline void native_apic_msr_write(u32 reg, u32 v)
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{
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if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
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reg == APIC_LVR)
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return;
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wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
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}
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static inline u32 native_apic_msr_read(u32 reg)
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{
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u32 low, high;
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if (reg == APIC_DFR)
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return -1;
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rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
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return low;
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}
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#ifndef CONFIG_X86_32
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extern int x2apic, x2apic_preenabled;
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extern void check_x2apic(void);
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extern void enable_x2apic(void);
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extern void enable_IR_x2apic(void);
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extern void x2apic_icr_write(u32 low, u32 id);
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#endif
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struct apic_ops {
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u32 (*read)(u32 reg);
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void (*write)(u32 reg, u32 v);
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u64 (*icr_read)(void);
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void (*icr_write)(u32 low, u32 high);
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void (*wait_icr_idle)(void);
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u32 (*safe_wait_icr_idle)(void);
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};
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extern struct apic_ops *apic_ops;
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#define apic_read (apic_ops->read)
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#define apic_write (apic_ops->write)
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#define apic_icr_read (apic_ops->icr_read)
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#define apic_icr_write (apic_ops->icr_write)
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#define apic_wait_icr_idle (apic_ops->wait_icr_idle)
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#define safe_apic_wait_icr_idle (apic_ops->safe_wait_icr_idle)
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extern int get_physical_broadcast(void);
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#ifdef CONFIG_X86_64
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static inline void ack_x2APIC_irq(void)
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{
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/* Docs say use 0 for future compatibility */
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native_apic_msr_write(APIC_EOI, 0);
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}
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#endif
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static inline void ack_APIC_irq(void)
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{
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/*
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* ack_APIC_irq() actually gets compiled as a single instruction:
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* - a single rmw on Pentium/82489DX
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* - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
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* ... yummie.
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*/
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/* Docs say use 0 for future compatibility */
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apic_write(APIC_EOI, 0);
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}
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extern int lapic_get_maxlvt(void);
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extern void clear_local_APIC(void);
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extern void connect_bsp_APIC(void);
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extern void disconnect_bsp_APIC(int virt_wire_setup);
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extern void disable_local_APIC(void);
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extern void lapic_shutdown(void);
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extern int verify_local_APIC(void);
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extern void cache_APIC_registers(void);
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extern void sync_Arb_IDs(void);
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extern void init_bsp_APIC(void);
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extern void setup_local_APIC(void);
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extern void end_local_APIC_setup(void);
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extern void init_apic_mappings(void);
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extern void setup_boot_APIC_clock(void);
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extern void setup_secondary_APIC_clock(void);
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extern int APIC_init_uniprocessor(void);
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extern void enable_NMI_through_LVT0(void);
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/*
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* On 32bit this is mach-xxx local
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*/
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#ifdef CONFIG_X86_64
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extern void early_init_lapic_mapping(void);
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extern int apic_is_clustered_box(void);
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#else
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static inline int apic_is_clustered_box(void)
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{
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return 0;
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}
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#endif
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extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
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extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
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#else /* !CONFIG_X86_LOCAL_APIC */
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static inline void lapic_shutdown(void) { }
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#define local_apic_timer_c2_ok 1
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static inline void init_apic_mappings(void) { }
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#endif /* !CONFIG_X86_LOCAL_APIC */
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#endif /* __ASM_APIC_H */
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