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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2f4dfe206a
With the advent of kdump, the assumption that the boot CPU when booting an UP
kernel is always the CPU with a particular hardware ID (often 0) (usually
referred to as BSP on some architectures) is not valid anymore. The reason
being that the dump capture kernel boots on the crashed CPU (the CPU that
invoked crash_kexec), which may be or may not be that particular CPU.
Move definition of hard_smp_processor_id for the UP case to
architecture-specific code ("asm/smp.h") where it belongs, so that each
architecture can provide its own implementation.
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Acked-by: Andi Kleen <ak@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
#ifndef _ASM_M32R_SMP_H
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#define _ASM_M32R_SMP_H
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#ifdef CONFIG_SMP
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/spinlock.h>
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#include <linux/threads.h>
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#include <asm/m32r.h>
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#define PHYSID_ARRAY_SIZE 1
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struct physid_mask
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{
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unsigned long mask[PHYSID_ARRAY_SIZE];
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};
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typedef struct physid_mask physid_mask_t;
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#define physid_set(physid, map) set_bit(physid, (map).mask)
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#define physid_clear(physid, map) clear_bit(physid, (map).mask)
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#define physid_isset(physid, map) test_bit(physid, (map).mask)
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#define physid_test_and_set(physid, map) test_and_set_bit(physid, (map).mask)
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#define physids_and(dst, src1, src2) bitmap_and((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
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#define physids_or(dst, src1, src2) bitmap_or((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
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#define physids_clear(map) bitmap_zero((map).mask, MAX_APICS)
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#define physids_complement(dst, src) bitmap_complement((dst).mask,(src).mask, MAX_APICS)
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#define physids_empty(map) bitmap_empty((map).mask, MAX_APICS)
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#define physids_equal(map1, map2) bitmap_equal((map1).mask, (map2).mask, MAX_APICS)
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#define physids_weight(map) bitmap_weight((map).mask, MAX_APICS)
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#define physids_shift_right(d, s, n) bitmap_shift_right((d).mask, (s).mask, n, MAX_APICS)
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#define physids_shift_left(d, s, n) bitmap_shift_left((d).mask, (s).mask, n, MAX_APICS)
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#define physids_coerce(map) ((map).mask[0])
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#define physids_promote(physids) \
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({ \
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physid_mask_t __physid_mask = PHYSID_MASK_NONE; \
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__physid_mask.mask[0] = physids; \
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__physid_mask; \
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})
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#define physid_mask_of_physid(physid) \
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({ \
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physid_mask_t __physid_mask = PHYSID_MASK_NONE; \
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physid_set(physid, __physid_mask); \
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__physid_mask; \
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})
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#define PHYSID_MASK_ALL { {[0 ... PHYSID_ARRAY_SIZE-1] = ~0UL} }
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#define PHYSID_MASK_NONE { {[0 ... PHYSID_ARRAY_SIZE-1] = 0UL} }
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extern physid_mask_t phys_cpu_present_map;
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/*
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* Some lowlevel functions might want to know about
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* the real CPU ID <-> CPU # mapping.
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*/
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extern volatile int cpu_2_physid[NR_CPUS];
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#define cpu_to_physid(cpu_id) cpu_2_physid[cpu_id]
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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extern cpumask_t cpu_callout_map;
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extern cpumask_t cpu_possible_map;
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extern cpumask_t cpu_present_map;
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static __inline__ int hard_smp_processor_id(void)
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{
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return (int)*(volatile long *)M32R_CPUID_PORTL;
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}
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static __inline__ int cpu_logical_map(int cpu)
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{
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return cpu;
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}
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static __inline__ int cpu_number_map(int cpu)
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{
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return cpu;
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}
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static __inline__ unsigned int num_booting_cpus(void)
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{
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return cpus_weight(cpu_callout_map);
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}
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extern void smp_send_timer(void);
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extern unsigned long send_IPI_mask_phys(cpumask_t, int, int);
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#endif /* not __ASSEMBLY__ */
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#define NO_PROC_ID (0xff) /* No processor magic marker */
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#define PROC_CHANGE_PENALTY (15) /* Schedule penalty */
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/*
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* M32R-mp IPI
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*/
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#define RESCHEDULE_IPI (M32R_IRQ_IPI0-M32R_IRQ_IPI0)
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#define INVALIDATE_TLB_IPI (M32R_IRQ_IPI1-M32R_IRQ_IPI0)
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#define CALL_FUNCTION_IPI (M32R_IRQ_IPI2-M32R_IRQ_IPI0)
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#define LOCAL_TIMER_IPI (M32R_IRQ_IPI3-M32R_IRQ_IPI0)
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#define INVALIDATE_CACHE_IPI (M32R_IRQ_IPI4-M32R_IRQ_IPI0)
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#define CPU_BOOT_IPI (M32R_IRQ_IPI5-M32R_IRQ_IPI0)
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#define IPI_SHIFT (0)
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#define NR_IPIS (8)
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#else /* CONFIG_SMP */
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#define hard_smp_processor_id() 0
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#endif /* CONFIG_SMP */
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#endif /* _ASM_M32R_SMP_H */
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