9497adf974
- Add hw.clflush_disable loader tunable to avoid panic (trap 9) at
map_invalidate_cache_range() even if CPU is not Intel.
- This tunable can be set to -1 (default), 0 and 1. -1 is same as
current behavior, which automatically disable CLFLUSH on Intel CPUs
without CPUID_SS (should be occured on Xen only). You can specify 1
when this panic happened on non-Intel CPUs (such as AMD's). Because
disabling CLFLUSH may reduce performance, you can try with setting 0
on Intel CPUs without SS to use CLFLUSH feature.
- Amd64 init_secondary() calls initializecpu() while curthread is
still not properly set up. r199067 added the call to
TUNABLE_INT_FETCH() to initializecpu() that results in hang because
AP are started when kernel environment is already dynamic and thus
needs to acquire mutex, that is too early in AP start sequence to
work.
Extract the code that should be executed only once, because it sets
up global variables, from initializecpu() to initializecpucache(),
and call the later only from hammer_time() executed on BSP. Now,
TUNABLE_INT_FETCH() is done only once at BSP at the early boot
stage.
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*-
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* Copyright (c) 1995 Bruce D. Evans.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_MD_VAR_H_
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#define _MACHINE_MD_VAR_H_
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/*
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* Miscellaneous machine-dependent declarations.
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*/
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extern long Maxmem;
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extern u_int basemem;
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extern int busdma_swi_pending;
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extern u_int cpu_exthigh;
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extern u_int cpu_feature;
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extern u_int cpu_feature2;
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extern u_int amd_feature;
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extern u_int amd_feature2;
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extern u_int amd_pminfo;
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extern u_int via_feature_rng;
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extern u_int via_feature_xcrypt;
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extern u_int cpu_clflush_line_size;
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extern u_int cpu_fxsr;
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extern u_int cpu_high;
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extern u_int cpu_id;
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extern u_int cpu_mxcsr_mask;
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extern u_int cpu_procinfo;
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extern u_int cpu_procinfo2;
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extern char cpu_vendor[];
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extern u_int cpu_vendor_id;
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extern char kstack[];
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extern char sigcode[];
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extern int szsigcode;
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extern uint64_t *vm_page_dump;
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extern int vm_page_dump_size;
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extern int _udatasel;
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extern int _ucodesel;
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extern int _ucode32sel;
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extern int _ufssel;
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extern int _ugssel;
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typedef void alias_for_inthand_t(u_int cs, u_int ef, u_int esp, u_int ss);
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struct thread;
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struct reg;
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struct fpreg;
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struct dbreg;
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struct dumperinfo;
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void busdma_swi(void);
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void cpu_setregs(void);
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void doreti_iret(void) __asm(__STRING(doreti_iret));
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void doreti_iret_fault(void) __asm(__STRING(doreti_iret_fault));
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void ld_ds(void) __asm(__STRING(ld_ds));
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void ld_es(void) __asm(__STRING(ld_es));
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void ld_fs(void) __asm(__STRING(ld_fs));
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void ld_gs(void) __asm(__STRING(ld_gs));
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void ds_load_fault(void) __asm(__STRING(ds_load_fault));
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void es_load_fault(void) __asm(__STRING(es_load_fault));
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void fs_load_fault(void) __asm(__STRING(fs_load_fault));
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void gs_load_fault(void) __asm(__STRING(gs_load_fault));
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void dump_add_page(vm_paddr_t);
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void dump_drop_page(vm_paddr_t);
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void initializecpu(void);
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void initializecpucache(void);
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void fillw(int /*u_short*/ pat, void *base, size_t cnt);
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void fpstate_drop(struct thread *td);
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int is_physical_memory(vm_paddr_t addr);
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int isa_nmi(int cd);
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void pagecopy(void *from, void *to);
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void pagezero(void *addr);
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void setidt(int idx, alias_for_inthand_t *func, int typ, int dpl, int ist);
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int user_dbreg_trap(void);
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void minidumpsys(struct dumperinfo *);
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#endif /* !_MACHINE_MD_VAR_H_ */
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