Index: head/sys/sys/pcpu.h =================================================================== --- head/sys/sys/pcpu.h (revision 336348) +++ head/sys/sys/pcpu.h (revision 336349) @@ -1,251 +1,269 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001 Wind River Systems, Inc. * All rights reserved. * Written by: John Baldwin * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _SYS_PCPU_H_ #define _SYS_PCPU_H_ #ifdef LOCORE #error "no assembler-serviceable parts inside" #endif #include #include #include #include #include #include #include #include #define DPCPU_SETNAME "set_pcpu" #define DPCPU_SYMPREFIX "pcpu_entry_" #ifdef _KERNEL /* * Define a set for pcpu data. */ extern uintptr_t *__start_set_pcpu; __GLOBL(__start_set_pcpu); extern uintptr_t *__stop_set_pcpu; __GLOBL(__stop_set_pcpu); /* * Array of dynamic pcpu base offsets. Indexed by id. */ extern uintptr_t dpcpu_off[]; /* * Convenience defines. */ #define DPCPU_START ((uintptr_t)&__start_set_pcpu) #define DPCPU_STOP ((uintptr_t)&__stop_set_pcpu) #define DPCPU_BYTES (DPCPU_STOP - DPCPU_START) #define DPCPU_MODMIN 2048 #define DPCPU_SIZE roundup2(DPCPU_BYTES, PAGE_SIZE) #define DPCPU_MODSIZE (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN)) /* * Declaration and definition. */ #define DPCPU_NAME(n) pcpu_entry_##n #define DPCPU_DECLARE(t, n) extern t DPCPU_NAME(n) /* struct _hack is to stop this from being used with the static keyword. */ #define DPCPU_DEFINE(t, n) \ struct _hack; t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used +#if defined(KLD_MODULE) && defined(__aarch64__) +/* + * On some architectures the compiler will use PC-relative load to + * find the address of DPCPU data with the static keyword. We then + * use this to find the offset of the data in a per-CPU region. + * This works for in the kernel as we can allocate the space ahead + * of time, however modules need to allocate a sepatate space and + * then use relocations to fix the address of the data. As + * PC-relative data doesn't have a relocation there is nothing for + * the kernel module linker to fix so data is accessed from the + * wrong location. + * + * This is a workaround until a better solution can be found. +*/ #define DPCPU_DEFINE_STATIC(t, n) \ + t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used +#else +#define DPCPU_DEFINE_STATIC(t, n) \ static t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used +#endif /* * Accessors with a given base. */ #define _DPCPU_PTR(b, n) \ (__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n)) #define _DPCPU_GET(b, n) (*_DPCPU_PTR(b, n)) #define _DPCPU_SET(b, n, v) (*_DPCPU_PTR(b, n) = v) /* * Accessors for the current cpu. */ #define DPCPU_PTR(n) _DPCPU_PTR(PCPU_GET(dynamic), n) #define DPCPU_GET(n) (*DPCPU_PTR(n)) #define DPCPU_SET(n, v) (*DPCPU_PTR(n) = v) /* * Accessors for remote cpus. */ #define DPCPU_ID_PTR(i, n) _DPCPU_PTR(dpcpu_off[(i)], n) #define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n)) #define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v) /* * Utility macros. */ #define DPCPU_SUM(n) __extension__ \ ({ \ u_int _i; \ __typeof(*DPCPU_PTR(n)) sum; \ \ sum = 0; \ CPU_FOREACH(_i) { \ sum += *DPCPU_ID_PTR(_i, n); \ } \ sum; \ }) #define DPCPU_VARSUM(n, var) __extension__ \ ({ \ u_int _i; \ __typeof((DPCPU_PTR(n))->var) sum; \ \ sum = 0; \ CPU_FOREACH(_i) { \ sum += (DPCPU_ID_PTR(_i, n))->var; \ } \ sum; \ }) #define DPCPU_ZERO(n) do { \ u_int _i; \ \ CPU_FOREACH(_i) { \ bzero(DPCPU_ID_PTR(_i, n), sizeof(*DPCPU_PTR(n))); \ } \ } while(0) #endif /* _KERNEL */ /* * This structure maps out the global data that needs to be kept on a * per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR * macros defined in . Machine dependent fields are * defined in the PCPU_MD_FIELDS macro defined in . */ struct pcpu { struct thread *pc_curthread; /* Current thread */ struct thread *pc_idlethread; /* Idle thread */ struct thread *pc_fpcurthread; /* Fp state owner */ struct thread *pc_deadthread; /* Zombie thread or NULL */ struct pcb *pc_curpcb; /* Current pcb */ uint64_t pc_switchtime; /* cpu_ticks() at last csw */ int pc_switchticks; /* `ticks' at last csw */ u_int pc_cpuid; /* This cpu number */ STAILQ_ENTRY(pcpu) pc_allcpu; struct lock_list_entry *pc_spinlocks; long pc_cp_time[CPUSTATES]; /* statclock ticks */ struct device *pc_device; void *pc_netisr; /* netisr SWI cookie */ int pc_unused1; /* unused field */ int pc_domain; /* Memory domain. */ struct rm_queue pc_rm_queue; /* rmlock list of trackers */ uintptr_t pc_dynamic; /* Dynamic per-cpu data area */ uint64_t pc_early_dummy_counter; /* Startup time counter(9) */ /* * Keep MD fields last, so that CPU-specific variations on a * single architecture don't result in offset variations of * the machine-independent fields of the pcpu. Even though * the pcpu structure is private to the kernel, some ports * (e.g., lsof, part of gtop) define _KERNEL and include this * header. While strictly speaking this is wrong, there's no * reason not to keep the offsets of the MI fields constant * if only to make kernel debugging easier. */ PCPU_MD_FIELDS; } __aligned(CACHE_LINE_SIZE); #ifdef _KERNEL STAILQ_HEAD(cpuhead, pcpu); extern struct cpuhead cpuhead; extern struct pcpu *cpuid_to_pcpu[]; #define curcpu PCPU_GET(cpuid) #define curproc (curthread->td_proc) #ifndef curthread #define curthread PCPU_GET(curthread) #endif #define curvidata PCPU_GET(vidata) #define UMA_PCPU_ALLOC_SIZE PAGE_SIZE #ifdef CTASSERT #if defined(__i386__) || defined(__amd64__) /* Required for counters(9) to work on x86. */ CTASSERT(sizeof(struct pcpu) == UMA_PCPU_ALLOC_SIZE); #else /* * To minimize memory waste in per-cpu UMA zones, size of struct pcpu * should be denominator of PAGE_SIZE. */ CTASSERT((PAGE_SIZE / sizeof(struct pcpu)) * sizeof(struct pcpu) == PAGE_SIZE); #endif /* UMA_PCPU_ALLOC_SIZE && x86 */ #endif /* CTASSERT */ /* Accessor to elements allocated via UMA_ZONE_PCPU zone. */ static inline void * zpcpu_get(void *base) { return ((char *)(base) + UMA_PCPU_ALLOC_SIZE * curcpu); } static inline void * zpcpu_get_cpu(void *base, int cpu) { return ((char *)(base) + UMA_PCPU_ALLOC_SIZE * cpu); } /* * Machine dependent callouts. cpu_pcpu_init() is responsible for * initializing machine dependent fields of struct pcpu, and * db_show_mdpcpu() is responsible for handling machine dependent * fields for the DDB 'show pcpu' command. */ void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size); void db_show_mdpcpu(struct pcpu *pcpu); void *dpcpu_alloc(int size); void dpcpu_copy(void *s, int size); void dpcpu_free(void *s, int size); void dpcpu_init(void *dpcpu, int cpuid); void pcpu_destroy(struct pcpu *pcpu); struct pcpu *pcpu_find(u_int cpuid); void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size); #endif /* _KERNEL */ #endif /* !_SYS_PCPU_H_ */