machdep.c revision 292472
177218Sphk/*- 277218Sphk * Copyright (c) 2003 Peter Wemm. 377218Sphk * Copyright (c) 1992 Terrence R. Lambert. 477218Sphk * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. 577218Sphk * All rights reserved. 677218Sphk * 777218Sphk * This code is derived from software contributed to Berkeley by 877218Sphk * William Jolitz. 977218Sphk * 1077218Sphk * Redistribution and use in source and binary forms, with or without 1177218Sphk * modification, are permitted provided that the following conditions 1291454Sbrooks * are met: 1391454Sbrooks * 1. Redistributions of source code must retain the above copyright 1477218Sphk * notice, this list of conditions and the following disclaimer. 1577218Sphk * 2. Redistributions in binary form must reproduce the above copyright 1677218Sphk * notice, this list of conditions and the following disclaimer in the 1777218Sphk * documentation and/or other materials provided with the distribution. 1877218Sphk * 3. All advertising materials mentioning features or use of this software 1977218Sphk * must display the following acknowledgement: 2077218Sphk * This product includes software developed by the University of 2177218Sphk * California, Berkeley and its contributors. 2277218Sphk * 4. Neither the name of the University nor the names of its contributors 2377218Sphk * may be used to endorse or promote products derived from this software 2477218Sphk * without specific prior written permission. 2577218Sphk * 2677218Sphk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2777218Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2877218Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2977218Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3077218Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3177218Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3277218Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3377218Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3477218Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3577218Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3677218Sphk * SUCH DAMAGE. 3777218Sphk * 3877218Sphk * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91 3977218Sphk */ 4077218Sphk 4177218Sphk#include <sys/cdefs.h> 4277218Sphk__FBSDID("$FreeBSD: head/sys/amd64/amd64/machdep.c 292472 2015-12-19 19:01:43Z imp $"); 4377218Sphk 4477218Sphk#include "opt_atpic.h" 4577218Sphk#include "opt_compat.h" 4677218Sphk#include "opt_cpu.h" 4777218Sphk#include "opt_ddb.h" 4877218Sphk#include "opt_inet.h" 4977218Sphk#include "opt_isa.h" 5077218Sphk#include "opt_kstack_pages.h" 5177218Sphk#include "opt_maxmem.h" 5277218Sphk#include "opt_mp_watchdog.h" 5377218Sphk#include "opt_perfmon.h" 5477218Sphk#include "opt_platform.h" 5577218Sphk#include "opt_sched.h" 5677218Sphk 5777218Sphk#include <sys/param.h> 5877218Sphk#include <sys/proc.h> 5977218Sphk#include <sys/systm.h> 6077218Sphk#include <sys/bio.h> 6177218Sphk#include <sys/buf.h> 6277218Sphk#include <sys/bus.h> 6377218Sphk#include <sys/callout.h> 6477218Sphk#include <sys/cons.h> 6577218Sphk#include <sys/cpu.h> 6677218Sphk#include <sys/efi.h> 6777218Sphk#include <sys/eventhandler.h> 6877218Sphk#include <sys/exec.h> 6977218Sphk#include <sys/imgact.h> 7077218Sphk#include <sys/kdb.h> 7177218Sphk#include <sys/kernel.h> 7277218Sphk#include <sys/ktr.h> 7377218Sphk#include <sys/linker.h> 7477218Sphk#include <sys/lock.h> 7577218Sphk#include <sys/malloc.h> 7677218Sphk#include <sys/memrange.h> 7777218Sphk#include <sys/msgbuf.h> 78116957Ssam#include <sys/mutex.h> 79120178Ssam#include <sys/pcpu.h> 80116957Ssam#include <sys/ptrace.h> 8177218Sphk#include <sys/reboot.h> 8277218Sphk#include <sys/rwlock.h> 8377218Sphk#include <sys/sched.h> 8477218Sphk#include <sys/signalvar.h> 8577218Sphk#ifdef SMP 8677218Sphk#include <sys/smp.h> 8777218Sphk#endif 8877218Sphk#include <sys/syscallsubr.h> 8977218Sphk#include <sys/sysctl.h> 9077218Sphk#include <sys/sysent.h> 9177218Sphk#include <sys/sysproto.h> 9277218Sphk#include <sys/ucontext.h> 9377218Sphk#include <sys/vmmeter.h> 9477218Sphk 9577218Sphk#include <vm/vm.h> 9677218Sphk#include <vm/vm_extern.h> 9777218Sphk#include <vm/vm_kern.h> 9877218Sphk#include <vm/vm_page.h> 9977218Sphk#include <vm/vm_map.h> 10077218Sphk#include <vm/vm_object.h> 10177218Sphk#include <vm/vm_pager.h> 10277218Sphk#include <vm/vm_param.h> 10377218Sphk 10477218Sphk#ifdef DDB 10577218Sphk#ifndef KDB 106121827Sbrooks#error KDB must be enabled in order for DDB to work! 10788748Sambrisko#endif 10888748Sambrisko#include <ddb/ddb.h> 10988748Sambrisko#include <ddb/db_sym.h> 11088748Sambrisko#endif 11177218Sphk 11277218Sphk#include <net/netisr.h> 11377218Sphk 11477218Sphk#include <machine/clock.h> 11577218Sphk#include <machine/cpu.h> 11677218Sphk#include <machine/cputypes.h> 11777218Sphk#include <machine/intr_machdep.h> 11877218Sphk#include <x86/mca.h> 11977218Sphk#include <machine/md_var.h> 12077218Sphk#include <machine/metadata.h> 12177218Sphk#include <machine/mp_watchdog.h> 12277218Sphk#include <machine/pc/bios.h> 12377218Sphk#include <machine/pcb.h> 12477218Sphk#include <machine/proc.h> 12577218Sphk#include <machine/reg.h> 12677218Sphk#include <machine/sigframe.h> 12777218Sphk#include <machine/specialreg.h> 12877218Sphk#ifdef PERFMON 12977218Sphk#include <machine/perfmon.h> 13077218Sphk#endif 13177218Sphk#include <machine/tss.h> 13277218Sphk#ifdef SMP 13377218Sphk#include <machine/smp.h> 13477218Sphk#endif 135116957Ssam#ifdef FDT 136116957Ssam#include <x86/fdt.h> 137116957Ssam#endif 138116957Ssam 13977218Sphk#ifdef DEV_ATPIC 14077218Sphk#include <x86/isa/icu.h> 14177218Sphk#else 14277218Sphk#include <x86/apicvar.h> 14377218Sphk#endif 14477218Sphk 14577218Sphk#include <isa/isareg.h> 14691454Sbrooks#include <isa/rtc.h> 14777218Sphk#include <x86/init.h> 14891454Sbrooks 14977218Sphk/* Sanity check for __curthread() */ 15091454SbrooksCTASSERT(offsetof(struct pcpu, pc_curthread) == 0); 15177218Sphk 15277218Sphkextern u_int64_t hammer_time(u_int64_t, u_int64_t); 15377218Sphk 15477218Sphk#define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) 15577218Sphk#define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) 15677218Sphk 15777218Sphkstatic void cpu_startup(void *); 15877218Sphkstatic void get_fpcontext(struct thread *td, mcontext_t *mcp, 15977218Sphk char *xfpusave, size_t xfpusave_len); 16077218Sphkstatic int set_fpcontext(struct thread *td, mcontext_t *mcp, 16177218Sphk char *xfpustate, size_t xfpustate_len); 16277218SphkSYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 16377218Sphk 16491454Sbrooks/* Preload data parse function */ 16577218Sphkstatic caddr_t native_parse_preload_data(u_int64_t); 16691454Sbrooks 16777218Sphk/* Native function to fetch and parse the e820 map */ 16891454Sbrooksstatic void native_parse_memmap(caddr_t, vm_paddr_t *, int *); 16977218Sphk 17091454Sbrooks/* Default init_ops implementation. */ 17177218Sphkstruct init_ops init_ops = { 17291454Sbrooks .parse_preload_data = native_parse_preload_data, 17377218Sphk .early_clock_source_init = i8254_init, 17477218Sphk .early_delay = i8254_delay, 17577218Sphk .parse_memmap = native_parse_memmap, 17677218Sphk#ifdef SMP 17777218Sphk .mp_bootaddress = mp_bootaddress, 17877218Sphk .start_all_aps = native_start_all_aps, 17977218Sphk#endif 18077218Sphk .msi_init = msi_init, 18177218Sphk}; 18277218Sphk 18377218Sphk/* 18477218Sphk * The file "conf/ldscript.amd64" defines the symbol "kernphys". Its value is 18577218Sphk * the physical address at which the kernel is loaded. 18677218Sphk */ 18777218Sphkextern char kernphys[]; 18877218Sphk 18977218Sphkstruct msgbuf *msgbufp; 19077218Sphk 19177218Sphk/* 19277218Sphk * Physical address of the EFI System Table. Stashed from the metadata hints 19377218Sphk * passed into the kernel and used by the EFI code to call runtime services. 19477218Sphk */ 19577218Sphkvm_paddr_t efi_systbl; 19677218Sphk 19777218Sphk/* Intel ICH registers */ 19877218Sphk#define ICH_PMBASE 0x400 19977218Sphk#define ICH_SMI_EN ICH_PMBASE + 0x30 20077218Sphk 20177218Sphkint _udatasel, _ucodesel, _ucode32sel, _ufssel, _ugssel; 20277218Sphk 20391454Sbrooksint cold = 1; 20477218Sphk 20591454Sbrookslong Maxmem = 0; 20677218Sphklong realmem = 0; 20791454Sbrooks 20877218Sphk/* 20977218Sphk * The number of PHYSMAP entries must be one less than the number of 21077218Sphk * PHYSSEG entries because the PHYSMAP entry that spans the largest 21177218Sphk * physical address that is accessible by ISA DMA is split into two 21277218Sphk * PHYSSEG entries. 21377218Sphk */ 21477218Sphk#define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1)) 21577218Sphk 21677218Sphkvm_paddr_t phys_avail[PHYSMAP_SIZE + 2]; 21777218Sphkvm_paddr_t dump_avail[PHYSMAP_SIZE + 2]; 21877218Sphk 21977218Sphk/* must be 2 less so 0 0 can signal end of chunks */ 22077218Sphk#define PHYS_AVAIL_ARRAY_END ((sizeof(phys_avail) / sizeof(phys_avail[0])) - 2) 22177218Sphk#define DUMP_AVAIL_ARRAY_END ((sizeof(dump_avail) / sizeof(dump_avail[0])) - 2) 22277218Sphk 22377218Sphkstruct kva_md_info kmi; 22477218Sphk 22577218Sphkstatic struct trapframe proc0_tf; 22677218Sphkstruct region_descriptor r_gdt, r_idt; 22777218Sphk 22877218Sphkstruct pcpu __pcpu[MAXCPU]; 22977218Sphk 23077218Sphkstruct mtx icu_lock; 23177218Sphk 23277218Sphkstruct mem_range_softc mem_range_softc; 233120178Ssam 23477218Sphkstruct mtx dt_lock; /* lock for GDT and LDT */ 23591454Sbrooks 23677218Sphkvoid (*vmm_resume_p)(void); 23777218Sphk 23877218Sphkstatic void 23977218Sphkcpu_startup(dummy) 24077218Sphk void *dummy; 24177218Sphk{ 24277218Sphk uintmax_t memsize; 24377218Sphk char *sysenv; 24477218Sphk 24577218Sphk /* 24677218Sphk * On MacBooks, we need to disallow the legacy USB circuit to 24777218Sphk * generate an SMI# because this can cause several problems, 24877218Sphk * namely: incorrect CPU frequency detection and failure to 24977218Sphk * start the APs. 25077218Sphk * We do this by disabling a bit in the SMI_EN (SMI Control and 25177218Sphk * Enable register) of the Intel ICH LPC Interface Bridge. 25277218Sphk */ 25377218Sphk sysenv = kern_getenv("smbios.system.product"); 25477218Sphk if (sysenv != NULL) { 25577218Sphk if (strncmp(sysenv, "MacBook1,1", 10) == 0 || 25677218Sphk strncmp(sysenv, "MacBook3,1", 10) == 0 || 257120178Ssam strncmp(sysenv, "MacBook4,1", 10) == 0 || 25877218Sphk strncmp(sysenv, "MacBookPro1,1", 13) == 0 || 25977218Sphk strncmp(sysenv, "MacBookPro1,2", 13) == 0 || 26077218Sphk strncmp(sysenv, "MacBookPro3,1", 13) == 0 || 26191454Sbrooks strncmp(sysenv, "MacBookPro4,1", 13) == 0 || 26277218Sphk strncmp(sysenv, "Macmini1,1", 10) == 0) { 26377218Sphk if (bootverbose) 26477218Sphk printf("Disabling LEGACY_USB_EN bit on " 26591454Sbrooks "Intel ICH.\n"); 26677218Sphk outl(ICH_SMI_EN, inl(ICH_SMI_EN) & ~0x8); 26777218Sphk } 26877218Sphk freeenv(sysenv); 26977218Sphk } 27077218Sphk 27177218Sphk /* 27277218Sphk * Good {morning,afternoon,evening,night}. 27377218Sphk */ 27477218Sphk startrtclock(); 27577218Sphk printcpuinfo(); 27677218Sphk panicifcpuunsupported(); 27777218Sphk#ifdef PERFMON 27877218Sphk perfmon_init(); 27977218Sphk#endif 28077218Sphk 28191454Sbrooks /* 28277218Sphk * Display physical memory if SMBIOS reports reasonable amount. 28377218Sphk */ 28477218Sphk memsize = 0; 28577218Sphk sysenv = kern_getenv("smbios.memory.enabled"); 28677218Sphk if (sysenv != NULL) { 28777218Sphk memsize = (uintmax_t)strtoul(sysenv, (char **)NULL, 10) << 10; 28877218Sphk freeenv(sysenv); 289127649Ssam } 290127649Ssam if (memsize < ptoa((uintmax_t)vm_cnt.v_free_count)) 291127649Ssam memsize = ptoa((uintmax_t)Maxmem); 292127649Ssam printf("real memory = %ju (%ju MB)\n", memsize, memsize >> 20); 293127649Ssam realmem = atop(memsize); 294127649Ssam 295127649Ssam /* 296127649Ssam * Display any holes after the first chunk of extended memory. 297127649Ssam */ 298127649Ssam if (bootverbose) { 299127649Ssam int indx; 300127649Ssam 301127649Ssam printf("Physical memory chunk(s):\n"); 302127649Ssam for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 303127649Ssam vm_paddr_t size; 304127649Ssam 305127649Ssam size = phys_avail[indx + 1] - phys_avail[indx]; 306127649Ssam printf( 307127649Ssam "0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n", 308127649Ssam (uintmax_t)phys_avail[indx], 309127649Ssam (uintmax_t)phys_avail[indx + 1] - 1, 310127649Ssam (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); 311127649Ssam } 312127649Ssam } 313127649Ssam 314127649Ssam vm_ksubmap_init(&kmi); 315127649Ssam 316127649Ssam printf("avail memory = %ju (%ju MB)\n", 317127649Ssam ptoa((uintmax_t)vm_cnt.v_free_count), 318127649Ssam ptoa((uintmax_t)vm_cnt.v_free_count) / 1048576); 31995005Simp 32077218Sphk /* 32177218Sphk * Set up buffers, so they can be used to read disk labels. 32277218Sphk */ 32377218Sphk bufinit(); 32477218Sphk vm_pager_bufferinit(); 32577218Sphk 32677218Sphk cpu_setregs(); 32777218Sphk} 32877218Sphk 32977218Sphk/* 33077218Sphk * Send an interrupt to process. 33177218Sphk * 33277218Sphk * Stack is set up to allow sigcode stored 33377218Sphk * at top to call routine, followed by call 33477218Sphk * to sigreturn routine below. After sigreturn 33577218Sphk * resets the signal mask, the stack, and the 33677218Sphk * frame pointer, it returns to the user 33777218Sphk * specified pc, psl. 33877218Sphk */ 33988748Sambriskovoid 34088748Sambriskosendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 34188748Sambrisko{ 34288748Sambrisko struct sigframe sf, *sfp; 34388748Sambrisko struct pcb *pcb; 34488748Sambrisko struct proc *p; 34588748Sambrisko struct thread *td; 34688748Sambrisko struct sigacts *psp; 34788748Sambrisko char *sp; 34888748Sambrisko struct trapframe *regs; 34988748Sambrisko char *xfpusave; 35088748Sambrisko size_t xfpusave_len; 35177218Sphk int sig; 35277218Sphk int oonstack; 35377218Sphk 35477218Sphk td = curthread; 35577218Sphk pcb = td->td_pcb; 35677218Sphk p = td->td_proc; 35777218Sphk PROC_LOCK_ASSERT(p, MA_OWNED); 35877218Sphk sig = ksi->ksi_signo; 35977218Sphk psp = p->p_sigacts; 36077218Sphk mtx_assert(&psp->ps_mtx, MA_OWNED); 36177218Sphk regs = td->td_frame; 36277218Sphk oonstack = sigonstack(regs->tf_rsp); 36377218Sphk 36477218Sphk if (cpu_max_ext_state_size > sizeof(struct savefpu) && use_xsave) { 36577218Sphk xfpusave_len = cpu_max_ext_state_size - sizeof(struct savefpu); 36677218Sphk xfpusave = __builtin_alloca(xfpusave_len); 36777218Sphk } else { 36877218Sphk xfpusave_len = 0; 36977218Sphk xfpusave = NULL; 37077218Sphk } 37177218Sphk 37277218Sphk /* Save user context. */ 37377218Sphk bzero(&sf, sizeof(sf)); 37477218Sphk sf.sf_uc.uc_sigmask = *mask; 37577218Sphk sf.sf_uc.uc_stack = td->td_sigstk; 37677218Sphk sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 37777218Sphk ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 37877218Sphk sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 37977218Sphk bcopy(regs, &sf.sf_uc.uc_mcontext.mc_rdi, sizeof(*regs)); 38077218Sphk sf.sf_uc.uc_mcontext.mc_len = sizeof(sf.sf_uc.uc_mcontext); /* magic */ 38177218Sphk get_fpcontext(td, &sf.sf_uc.uc_mcontext, xfpusave, xfpusave_len); 38277218Sphk fpstate_drop(td); 38377218Sphk sf.sf_uc.uc_mcontext.mc_fsbase = pcb->pcb_fsbase; 38477218Sphk sf.sf_uc.uc_mcontext.mc_gsbase = pcb->pcb_gsbase; 38577218Sphk bzero(sf.sf_uc.uc_mcontext.mc_spare, 38677218Sphk sizeof(sf.sf_uc.uc_mcontext.mc_spare)); 38777218Sphk bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__)); 38877218Sphk 38977218Sphk /* Allocate space for the signal handler context. */ 39077218Sphk if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 39177218Sphk SIGISMEMBER(psp->ps_sigonstack, sig)) { 39277218Sphk sp = td->td_sigstk.ss_sp + td->td_sigstk.ss_size; 39377218Sphk#if defined(COMPAT_43) 39477218Sphk td->td_sigstk.ss_flags |= SS_ONSTACK; 39577218Sphk#endif 39677218Sphk } else 39777218Sphk sp = (char *)regs->tf_rsp - 128; 39877218Sphk if (xfpusave != NULL) { 39977218Sphk sp -= xfpusave_len; 40077218Sphk sp = (char *)((unsigned long)sp & ~0x3Ful); 40177218Sphk sf.sf_uc.uc_mcontext.mc_xfpustate = (register_t)sp; 40277218Sphk } 40377218Sphk sp -= sizeof(struct sigframe); 40477218Sphk /* Align to 16 bytes. */ 40577218Sphk sfp = (struct sigframe *)((unsigned long)sp & ~0xFul); 40691454Sbrooks 40777218Sphk /* Build the argument list for the signal handler. */ 40877218Sphk regs->tf_rdi = sig; /* arg 1 in %rdi */ 40977218Sphk regs->tf_rdx = (register_t)&sfp->sf_uc; /* arg 3 in %rdx */ 41077218Sphk bzero(&sf.sf_si, sizeof(sf.sf_si)); 41177218Sphk if (SIGISMEMBER(psp->ps_siginfo, sig)) { 41277218Sphk /* Signal handler installed with SA_SIGINFO. */ 413127649Ssam regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */ 414127649Ssam sf.sf_ahu.sf_action = (__siginfohandler_t *)catcher; 415127649Ssam 416127649Ssam /* Fill in POSIX parts */ 417127649Ssam sf.sf_si = ksi->ksi_info; 418127649Ssam sf.sf_si.si_signo = sig; /* maybe a translated signal */ 419127649Ssam regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */ 420127649Ssam } else { 421127649Ssam /* Old FreeBSD-style arguments. */ 422127649Ssam regs->tf_rsi = ksi->ksi_code; /* arg 2 in %rsi */ 423127649Ssam regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */ 424127649Ssam sf.sf_ahu.sf_handler = catcher; 425127649Ssam } 426127649Ssam mtx_unlock(&psp->ps_mtx); 427127649Ssam PROC_UNLOCK(p); 428127649Ssam 429127649Ssam /* 430127649Ssam * Copy the sigframe out to the user's stack. 431127649Ssam */ 432127649Ssam if (copyout(&sf, sfp, sizeof(*sfp)) != 0 || 433127649Ssam (xfpusave != NULL && copyout(xfpusave, 434127649Ssam (void *)sf.sf_uc.uc_mcontext.mc_xfpustate, xfpusave_len) 435127649Ssam != 0)) { 436127649Ssam#ifdef DEBUG 437127649Ssam printf("process %ld has trashed its stack\n", (long)p->p_pid); 438127649Ssam#endif 439127649Ssam PROC_LOCK(p); 440127649Ssam sigexit(td, SIGILL); 441127649Ssam } 442127649Ssam 443127649Ssam regs->tf_rsp = (long)sfp; 444127649Ssam regs->tf_rip = p->p_sysent->sv_sigcode_base; 445127649Ssam regs->tf_rflags &= ~(PSL_T | PSL_D); 446127649Ssam regs->tf_cs = _ucodesel; 447127649Ssam regs->tf_ds = _udatasel; 448127649Ssam regs->tf_ss = _udatasel; 44977218Sphk regs->tf_es = _udatasel; 45080315Sbrooks regs->tf_fs = _ufssel; 45180315Sbrooks regs->tf_gs = _ugssel; 45277218Sphk regs->tf_flags = TF_HASSEGS; 45377218Sphk set_pcb_flags(pcb, PCB_FULL_IRET); 45477218Sphk PROC_LOCK(p); 45577218Sphk mtx_lock(&psp->ps_mtx); 45677218Sphk} 45777218Sphk 45877218Sphk/* 45977218Sphk * System call to cleanup state after a signal 46077218Sphk * has been taken. Reset signal mask and 46177218Sphk * stack state from context left by sendsig (above). 46277218Sphk * Return to previous pc and psl as specified by 46377218Sphk * context left by sendsig. Check carefully to 46477218Sphk * make sure that the user has not modified the 46577218Sphk * state to gain improper privileges. 46677218Sphk * 46777218Sphk * MPSAFE 46877218Sphk */ 46977218Sphkint 47077218Sphksys_sigreturn(td, uap) 47191454Sbrooks struct thread *td; 47277218Sphk struct sigreturn_args /* { 47377218Sphk const struct __ucontext *sigcntxp; 47477218Sphk } */ *uap; 47577218Sphk{ 47677218Sphk ucontext_t uc; 47777218Sphk struct pcb *pcb; 47877218Sphk struct proc *p; 47977218Sphk struct trapframe *regs; 48077218Sphk ucontext_t *ucp; 48177218Sphk char *xfpustate; 48277218Sphk size_t xfpustate_len; 48377218Sphk long rflags; 48477218Sphk int cs, error, ret; 48577218Sphk ksiginfo_t ksi; 48677218Sphk 48777218Sphk pcb = td->td_pcb; 48877218Sphk p = td->td_proc; 48977218Sphk 49077218Sphk error = copyin(uap->sigcntxp, &uc, sizeof(uc)); 49191454Sbrooks if (error != 0) { 49277218Sphk uprintf("pid %d (%s): sigreturn copyin failed\n", 49377218Sphk p->p_pid, td->td_name); 49477218Sphk return (error); 49577218Sphk } 49677218Sphk ucp = &uc; 497120178Ssam if ((ucp->uc_mcontext.mc_flags & ~_MC_FLAG_MASK) != 0) { 498120178Ssam uprintf("pid %d (%s): sigreturn mc_flags %x\n", p->p_pid, 49977218Sphk td->td_name, ucp->uc_mcontext.mc_flags); 50077218Sphk return (EINVAL); 501120178Ssam } 502120178Ssam regs = td->td_frame; 50391454Sbrooks rflags = ucp->uc_mcontext.mc_rflags; 50477218Sphk /* 50577218Sphk * Don't allow users to change privileged or reserved flags. 50680315Sbrooks */ 50780315Sbrooks if (!EFL_SECURE(rflags, regs->tf_rflags)) { 50877218Sphk uprintf("pid %d (%s): sigreturn rflags = 0x%lx\n", p->p_pid, 50977218Sphk td->td_name, rflags); 51077218Sphk return (EINVAL); 51177218Sphk } 51277218Sphk 51377218Sphk /* 51477218Sphk * Don't allow users to load a valid privileged %cs. Let the 51577218Sphk * hardware check for invalid selectors, excess privilege in 51677218Sphk * other selectors, invalid %eip's and invalid %esp's. 51777218Sphk */ 51877218Sphk cs = ucp->uc_mcontext.mc_cs; 51977218Sphk if (!CS_SECURE(cs)) { 52077218Sphk uprintf("pid %d (%s): sigreturn cs = 0x%x\n", p->p_pid, 52177218Sphk td->td_name, cs); 52277218Sphk ksiginfo_init_trap(&ksi); 52377218Sphk ksi.ksi_signo = SIGBUS; 52477218Sphk ksi.ksi_code = BUS_OBJERR; 52591454Sbrooks ksi.ksi_trapno = T_PROTFLT; 52677218Sphk ksi.ksi_addr = (void *)regs->tf_rip; 52777218Sphk trapsignal(td, &ksi); 52877218Sphk return (EINVAL); 52977218Sphk } 53077218Sphk 53177218Sphk if ((uc.uc_mcontext.mc_flags & _MC_HASFPXSTATE) != 0) { 53277218Sphk xfpustate_len = uc.uc_mcontext.mc_xfpustate_len; 53377218Sphk if (xfpustate_len > cpu_max_ext_state_size - 53477218Sphk sizeof(struct savefpu)) { 53577218Sphk uprintf("pid %d (%s): sigreturn xfpusave_len = 0x%zx\n", 53677218Sphk p->p_pid, td->td_name, xfpustate_len); 53777218Sphk return (EINVAL); 53877218Sphk } 53977218Sphk xfpustate = __builtin_alloca(xfpustate_len); 54077218Sphk error = copyin((const void *)uc.uc_mcontext.mc_xfpustate, 54177218Sphk xfpustate, xfpustate_len); 54277218Sphk if (error != 0) { 54377218Sphk uprintf( 54477218Sphk "pid %d (%s): sigreturn copying xfpustate failed\n", 54577218Sphk p->p_pid, td->td_name); 54677218Sphk return (error); 54777218Sphk } 54877218Sphk } else { 549127831Sphk xfpustate = NULL; 55077218Sphk xfpustate_len = 0; 55177218Sphk } 55277218Sphk ret = set_fpcontext(td, &ucp->uc_mcontext, xfpustate, xfpustate_len); 553127831Sphk if (ret != 0) { 554127831Sphk uprintf("pid %d (%s): sigreturn set_fpcontext err %d\n", 555127831Sphk p->p_pid, td->td_name, ret); 556127831Sphk return (ret); 55777218Sphk } 558127831Sphk bcopy(&ucp->uc_mcontext.mc_rdi, regs, sizeof(*regs)); 55977218Sphk pcb->pcb_fsbase = ucp->uc_mcontext.mc_fsbase; 56077218Sphk pcb->pcb_gsbase = ucp->uc_mcontext.mc_gsbase; 56177218Sphk 562127831Sphk#if defined(COMPAT_43) 56377218Sphk if (ucp->uc_mcontext.mc_onstack & 1) 56477218Sphk td->td_sigstk.ss_flags |= SS_ONSTACK; 56577218Sphk else 56677218Sphk td->td_sigstk.ss_flags &= ~SS_ONSTACK; 56777218Sphk#endif 56877218Sphk 56977218Sphk kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); 57077218Sphk set_pcb_flags(pcb, PCB_FULL_IRET); 57177218Sphk return (EJUSTRETURN); 57277218Sphk} 57377218Sphk 57477218Sphk#ifdef COMPAT_FREEBSD4 57577218Sphkint 57677218Sphkfreebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 57777218Sphk{ 57877218Sphk 57977218Sphk return sys_sigreturn(td, (struct sigreturn_args *)uap); 58077218Sphk} 58177218Sphk#endif 58277218Sphk 58377218Sphk/* 58477218Sphk * Reset registers to default values on exec. 58577218Sphk */ 58677218Sphkvoid 58777218Sphkexec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 58877218Sphk{ 58977218Sphk struct trapframe *regs = td->td_frame; 59077218Sphk struct pcb *pcb = td->td_pcb; 59177218Sphk 59291454Sbrooks mtx_lock(&dt_lock); 59377218Sphk if (td->td_proc->p_md.md_ldt != NULL) 59477218Sphk user_ldt_free(td); 59577218Sphk else 59677218Sphk mtx_unlock(&dt_lock); 59777218Sphk 59877218Sphk pcb->pcb_fsbase = 0; 59977218Sphk pcb->pcb_gsbase = 0; 60077218Sphk clear_pcb_flags(pcb, PCB_32BIT); 60177218Sphk pcb->pcb_initial_fpucw = __INITIAL_FPUCW__; 60277218Sphk set_pcb_flags(pcb, PCB_FULL_IRET); 60377218Sphk 60477218Sphk bzero((char *)regs, sizeof(struct trapframe)); 60577218Sphk regs->tf_rip = imgp->entry_addr; 60677218Sphk regs->tf_rsp = ((stack - 8) & ~0xFul) + 8; 60777218Sphk regs->tf_rdi = stack; /* argv */ 60877218Sphk regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T); 60977218Sphk regs->tf_ss = _udatasel; 610 regs->tf_cs = _ucodesel; 611 regs->tf_ds = _udatasel; 612 regs->tf_es = _udatasel; 613 regs->tf_fs = _ufssel; 614 regs->tf_gs = _ugssel; 615 regs->tf_flags = TF_HASSEGS; 616 td->td_retval[1] = 0; 617 618 /* 619 * Reset the hardware debug registers if they were in use. 620 * They won't have any meaning for the newly exec'd process. 621 */ 622 if (pcb->pcb_flags & PCB_DBREGS) { 623 pcb->pcb_dr0 = 0; 624 pcb->pcb_dr1 = 0; 625 pcb->pcb_dr2 = 0; 626 pcb->pcb_dr3 = 0; 627 pcb->pcb_dr6 = 0; 628 pcb->pcb_dr7 = 0; 629 if (pcb == curpcb) { 630 /* 631 * Clear the debug registers on the running 632 * CPU, otherwise they will end up affecting 633 * the next process we switch to. 634 */ 635 reset_dbregs(); 636 } 637 clear_pcb_flags(pcb, PCB_DBREGS); 638 } 639 640 /* 641 * Drop the FP state if we hold it, so that the process gets a 642 * clean FP state if it uses the FPU again. 643 */ 644 fpstate_drop(td); 645} 646 647void 648cpu_setregs(void) 649{ 650 register_t cr0; 651 652 cr0 = rcr0(); 653 /* 654 * CR0_MP, CR0_NE and CR0_TS are also set by npx_probe() for the 655 * BSP. See the comments there about why we set them. 656 */ 657 cr0 |= CR0_MP | CR0_NE | CR0_TS | CR0_WP | CR0_AM; 658 load_cr0(cr0); 659} 660 661/* 662 * Initialize amd64 and configure to run kernel 663 */ 664 665/* 666 * Initialize segments & interrupt table 667 */ 668 669struct user_segment_descriptor gdt[NGDT * MAXCPU];/* global descriptor tables */ 670static struct gate_descriptor idt0[NIDT]; 671struct gate_descriptor *idt = &idt0[0]; /* interrupt descriptor table */ 672 673static char dblfault_stack[PAGE_SIZE] __aligned(16); 674 675static char nmi0_stack[PAGE_SIZE] __aligned(16); 676CTASSERT(sizeof(struct nmi_pcpu) == 16); 677 678struct amd64tss common_tss[MAXCPU]; 679 680/* 681 * Software prototypes -- in more palatable form. 682 * 683 * Keep GUFS32, GUGS32, GUCODE32 and GUDATA at the same 684 * slots as corresponding segments for i386 kernel. 685 */ 686struct soft_segment_descriptor gdt_segs[] = { 687/* GNULL_SEL 0 Null Descriptor */ 688{ .ssd_base = 0x0, 689 .ssd_limit = 0x0, 690 .ssd_type = 0, 691 .ssd_dpl = 0, 692 .ssd_p = 0, 693 .ssd_long = 0, 694 .ssd_def32 = 0, 695 .ssd_gran = 0 }, 696/* GNULL2_SEL 1 Null Descriptor */ 697{ .ssd_base = 0x0, 698 .ssd_limit = 0x0, 699 .ssd_type = 0, 700 .ssd_dpl = 0, 701 .ssd_p = 0, 702 .ssd_long = 0, 703 .ssd_def32 = 0, 704 .ssd_gran = 0 }, 705/* GUFS32_SEL 2 32 bit %gs Descriptor for user */ 706{ .ssd_base = 0x0, 707 .ssd_limit = 0xfffff, 708 .ssd_type = SDT_MEMRWA, 709 .ssd_dpl = SEL_UPL, 710 .ssd_p = 1, 711 .ssd_long = 0, 712 .ssd_def32 = 1, 713 .ssd_gran = 1 }, 714/* GUGS32_SEL 3 32 bit %fs Descriptor for user */ 715{ .ssd_base = 0x0, 716 .ssd_limit = 0xfffff, 717 .ssd_type = SDT_MEMRWA, 718 .ssd_dpl = SEL_UPL, 719 .ssd_p = 1, 720 .ssd_long = 0, 721 .ssd_def32 = 1, 722 .ssd_gran = 1 }, 723/* GCODE_SEL 4 Code Descriptor for kernel */ 724{ .ssd_base = 0x0, 725 .ssd_limit = 0xfffff, 726 .ssd_type = SDT_MEMERA, 727 .ssd_dpl = SEL_KPL, 728 .ssd_p = 1, 729 .ssd_long = 1, 730 .ssd_def32 = 0, 731 .ssd_gran = 1 }, 732/* GDATA_SEL 5 Data Descriptor for kernel */ 733{ .ssd_base = 0x0, 734 .ssd_limit = 0xfffff, 735 .ssd_type = SDT_MEMRWA, 736 .ssd_dpl = SEL_KPL, 737 .ssd_p = 1, 738 .ssd_long = 1, 739 .ssd_def32 = 0, 740 .ssd_gran = 1 }, 741/* GUCODE32_SEL 6 32 bit Code Descriptor for user */ 742{ .ssd_base = 0x0, 743 .ssd_limit = 0xfffff, 744 .ssd_type = SDT_MEMERA, 745 .ssd_dpl = SEL_UPL, 746 .ssd_p = 1, 747 .ssd_long = 0, 748 .ssd_def32 = 1, 749 .ssd_gran = 1 }, 750/* GUDATA_SEL 7 32/64 bit Data Descriptor for user */ 751{ .ssd_base = 0x0, 752 .ssd_limit = 0xfffff, 753 .ssd_type = SDT_MEMRWA, 754 .ssd_dpl = SEL_UPL, 755 .ssd_p = 1, 756 .ssd_long = 0, 757 .ssd_def32 = 1, 758 .ssd_gran = 1 }, 759/* GUCODE_SEL 8 64 bit Code Descriptor for user */ 760{ .ssd_base = 0x0, 761 .ssd_limit = 0xfffff, 762 .ssd_type = SDT_MEMERA, 763 .ssd_dpl = SEL_UPL, 764 .ssd_p = 1, 765 .ssd_long = 1, 766 .ssd_def32 = 0, 767 .ssd_gran = 1 }, 768/* GPROC0_SEL 9 Proc 0 Tss Descriptor */ 769{ .ssd_base = 0x0, 770 .ssd_limit = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE - 1, 771 .ssd_type = SDT_SYSTSS, 772 .ssd_dpl = SEL_KPL, 773 .ssd_p = 1, 774 .ssd_long = 0, 775 .ssd_def32 = 0, 776 .ssd_gran = 0 }, 777/* Actually, the TSS is a system descriptor which is double size */ 778{ .ssd_base = 0x0, 779 .ssd_limit = 0x0, 780 .ssd_type = 0, 781 .ssd_dpl = 0, 782 .ssd_p = 0, 783 .ssd_long = 0, 784 .ssd_def32 = 0, 785 .ssd_gran = 0 }, 786/* GUSERLDT_SEL 11 LDT Descriptor */ 787{ .ssd_base = 0x0, 788 .ssd_limit = 0x0, 789 .ssd_type = 0, 790 .ssd_dpl = 0, 791 .ssd_p = 0, 792 .ssd_long = 0, 793 .ssd_def32 = 0, 794 .ssd_gran = 0 }, 795/* GUSERLDT_SEL 12 LDT Descriptor, double size */ 796{ .ssd_base = 0x0, 797 .ssd_limit = 0x0, 798 .ssd_type = 0, 799 .ssd_dpl = 0, 800 .ssd_p = 0, 801 .ssd_long = 0, 802 .ssd_def32 = 0, 803 .ssd_gran = 0 }, 804}; 805 806void 807setidt(int idx, inthand_t *func, int typ, int dpl, int ist) 808{ 809 struct gate_descriptor *ip; 810 811 ip = idt + idx; 812 ip->gd_looffset = (uintptr_t)func; 813 ip->gd_selector = GSEL(GCODE_SEL, SEL_KPL); 814 ip->gd_ist = ist; 815 ip->gd_xx = 0; 816 ip->gd_type = typ; 817 ip->gd_dpl = dpl; 818 ip->gd_p = 1; 819 ip->gd_hioffset = ((uintptr_t)func)>>16 ; 820} 821 822extern inthand_t 823 IDTVEC(div), IDTVEC(dbg), IDTVEC(nmi), IDTVEC(bpt), IDTVEC(ofl), 824 IDTVEC(bnd), IDTVEC(ill), IDTVEC(dna), IDTVEC(fpusegm), 825 IDTVEC(tss), IDTVEC(missing), IDTVEC(stk), IDTVEC(prot), 826 IDTVEC(page), IDTVEC(mchk), IDTVEC(rsvd), IDTVEC(fpu), IDTVEC(align), 827 IDTVEC(xmm), IDTVEC(dblfault), 828#ifdef KDTRACE_HOOKS 829 IDTVEC(dtrace_ret), 830#endif 831#ifdef XENHVM 832 IDTVEC(xen_intr_upcall), 833#endif 834 IDTVEC(fast_syscall), IDTVEC(fast_syscall32); 835 836#ifdef DDB 837/* 838 * Display the index and function name of any IDT entries that don't use 839 * the default 'rsvd' entry point. 840 */ 841DB_SHOW_COMMAND(idt, db_show_idt) 842{ 843 struct gate_descriptor *ip; 844 int idx; 845 uintptr_t func; 846 847 ip = idt; 848 for (idx = 0; idx < NIDT && !db_pager_quit; idx++) { 849 func = ((long)ip->gd_hioffset << 16 | ip->gd_looffset); 850 if (func != (uintptr_t)&IDTVEC(rsvd)) { 851 db_printf("%3d\t", idx); 852 db_printsym(func, DB_STGY_PROC); 853 db_printf("\n"); 854 } 855 ip++; 856 } 857} 858 859/* Show privileged registers. */ 860DB_SHOW_COMMAND(sysregs, db_show_sysregs) 861{ 862 struct { 863 uint16_t limit; 864 uint64_t base; 865 } __packed idtr, gdtr; 866 uint16_t ldt, tr; 867 868 __asm __volatile("sidt %0" : "=m" (idtr)); 869 db_printf("idtr\t0x%016lx/%04x\n", 870 (u_long)idtr.base, (u_int)idtr.limit); 871 __asm __volatile("sgdt %0" : "=m" (gdtr)); 872 db_printf("gdtr\t0x%016lx/%04x\n", 873 (u_long)gdtr.base, (u_int)gdtr.limit); 874 __asm __volatile("sldt %0" : "=r" (ldt)); 875 db_printf("ldtr\t0x%04x\n", ldt); 876 __asm __volatile("str %0" : "=r" (tr)); 877 db_printf("tr\t0x%04x\n", tr); 878 db_printf("cr0\t0x%016lx\n", rcr0()); 879 db_printf("cr2\t0x%016lx\n", rcr2()); 880 db_printf("cr3\t0x%016lx\n", rcr3()); 881 db_printf("cr4\t0x%016lx\n", rcr4()); 882 if (rcr4() & CR4_XSAVE) 883 db_printf("xcr0\t0x%016lx\n", rxcr(0)); 884 db_printf("EFER\t0x%016lx\n", rdmsr(MSR_EFER)); 885 if (cpu_feature2 & (CPUID2_VMX | CPUID2_SMX)) 886 db_printf("FEATURES_CTL\t%016lx\n", 887 rdmsr(MSR_IA32_FEATURE_CONTROL)); 888 db_printf("DEBUG_CTL\t0x%016lx\n", rdmsr(MSR_DEBUGCTLMSR)); 889 db_printf("PAT\t0x%016lx\n", rdmsr(MSR_PAT)); 890 db_printf("GSBASE\t0x%016lx\n", rdmsr(MSR_GSBASE)); 891} 892 893DB_SHOW_COMMAND(dbregs, db_show_dbregs) 894{ 895 896 db_printf("dr0\t0x%016lx\n", rdr0()); 897 db_printf("dr1\t0x%016lx\n", rdr1()); 898 db_printf("dr2\t0x%016lx\n", rdr2()); 899 db_printf("dr3\t0x%016lx\n", rdr3()); 900 db_printf("dr6\t0x%016lx\n", rdr6()); 901 db_printf("dr7\t0x%016lx\n", rdr7()); 902} 903#endif 904 905void 906sdtossd(sd, ssd) 907 struct user_segment_descriptor *sd; 908 struct soft_segment_descriptor *ssd; 909{ 910 911 ssd->ssd_base = (sd->sd_hibase << 24) | sd->sd_lobase; 912 ssd->ssd_limit = (sd->sd_hilimit << 16) | sd->sd_lolimit; 913 ssd->ssd_type = sd->sd_type; 914 ssd->ssd_dpl = sd->sd_dpl; 915 ssd->ssd_p = sd->sd_p; 916 ssd->ssd_long = sd->sd_long; 917 ssd->ssd_def32 = sd->sd_def32; 918 ssd->ssd_gran = sd->sd_gran; 919} 920 921void 922ssdtosd(ssd, sd) 923 struct soft_segment_descriptor *ssd; 924 struct user_segment_descriptor *sd; 925{ 926 927 sd->sd_lobase = (ssd->ssd_base) & 0xffffff; 928 sd->sd_hibase = (ssd->ssd_base >> 24) & 0xff; 929 sd->sd_lolimit = (ssd->ssd_limit) & 0xffff; 930 sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf; 931 sd->sd_type = ssd->ssd_type; 932 sd->sd_dpl = ssd->ssd_dpl; 933 sd->sd_p = ssd->ssd_p; 934 sd->sd_long = ssd->ssd_long; 935 sd->sd_def32 = ssd->ssd_def32; 936 sd->sd_gran = ssd->ssd_gran; 937} 938 939void 940ssdtosyssd(ssd, sd) 941 struct soft_segment_descriptor *ssd; 942 struct system_segment_descriptor *sd; 943{ 944 945 sd->sd_lobase = (ssd->ssd_base) & 0xffffff; 946 sd->sd_hibase = (ssd->ssd_base >> 24) & 0xfffffffffful; 947 sd->sd_lolimit = (ssd->ssd_limit) & 0xffff; 948 sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf; 949 sd->sd_type = ssd->ssd_type; 950 sd->sd_dpl = ssd->ssd_dpl; 951 sd->sd_p = ssd->ssd_p; 952 sd->sd_gran = ssd->ssd_gran; 953} 954 955#if !defined(DEV_ATPIC) && defined(DEV_ISA) 956#include <isa/isavar.h> 957#include <isa/isareg.h> 958/* 959 * Return a bitmap of the current interrupt requests. This is 8259-specific 960 * and is only suitable for use at probe time. 961 * This is only here to pacify sio. It is NOT FATAL if this doesn't work. 962 * It shouldn't be here. There should probably be an APIC centric 963 * implementation in the apic driver code, if at all. 964 */ 965intrmask_t 966isa_irq_pending(void) 967{ 968 u_char irr1; 969 u_char irr2; 970 971 irr1 = inb(IO_ICU1); 972 irr2 = inb(IO_ICU2); 973 return ((irr2 << 8) | irr1); 974} 975#endif 976 977u_int basemem; 978 979static int 980add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap, 981 int *physmap_idxp) 982{ 983 int i, insert_idx, physmap_idx; 984 985 physmap_idx = *physmap_idxp; 986 987 if (length == 0) 988 return (1); 989 990 /* 991 * Find insertion point while checking for overlap. Start off by 992 * assuming the new entry will be added to the end. 993 * 994 * NB: physmap_idx points to the next free slot. 995 */ 996 insert_idx = physmap_idx; 997 for (i = 0; i <= physmap_idx; i += 2) { 998 if (base < physmap[i + 1]) { 999 if (base + length <= physmap[i]) { 1000 insert_idx = i; 1001 break; 1002 } 1003 if (boothowto & RB_VERBOSE) 1004 printf( 1005 "Overlapping memory regions, ignoring second region\n"); 1006 return (1); 1007 } 1008 } 1009 1010 /* See if we can prepend to the next entry. */ 1011 if (insert_idx <= physmap_idx && base + length == physmap[insert_idx]) { 1012 physmap[insert_idx] = base; 1013 return (1); 1014 } 1015 1016 /* See if we can append to the previous entry. */ 1017 if (insert_idx > 0 && base == physmap[insert_idx - 1]) { 1018 physmap[insert_idx - 1] += length; 1019 return (1); 1020 } 1021 1022 physmap_idx += 2; 1023 *physmap_idxp = physmap_idx; 1024 if (physmap_idx == PHYSMAP_SIZE) { 1025 printf( 1026 "Too many segments in the physical address map, giving up\n"); 1027 return (0); 1028 } 1029 1030 /* 1031 * Move the last 'N' entries down to make room for the new 1032 * entry if needed. 1033 */ 1034 for (i = (physmap_idx - 2); i > insert_idx; i -= 2) { 1035 physmap[i] = physmap[i - 2]; 1036 physmap[i + 1] = physmap[i - 1]; 1037 } 1038 1039 /* Insert the new entry. */ 1040 physmap[insert_idx] = base; 1041 physmap[insert_idx + 1] = base + length; 1042 return (1); 1043} 1044 1045void 1046bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize, 1047 vm_paddr_t *physmap, int *physmap_idx) 1048{ 1049 struct bios_smap *smap, *smapend; 1050 1051 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 1052 1053 for (smap = smapbase; smap < smapend; smap++) { 1054 if (boothowto & RB_VERBOSE) 1055 printf("SMAP type=%02x base=%016lx len=%016lx\n", 1056 smap->type, smap->base, smap->length); 1057 1058 if (smap->type != SMAP_TYPE_MEMORY) 1059 continue; 1060 1061 if (!add_physmap_entry(smap->base, smap->length, physmap, 1062 physmap_idx)) 1063 break; 1064 } 1065} 1066 1067#define efi_next_descriptor(ptr, size) \ 1068 ((struct efi_md *)(((uint8_t *) ptr) + size)) 1069 1070static void 1071add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap, 1072 int *physmap_idx) 1073{ 1074 struct efi_md *map, *p; 1075 const char *type; 1076 size_t efisz; 1077 int ndesc, i; 1078 1079 static const char *types[] = { 1080 "Reserved", 1081 "LoaderCode", 1082 "LoaderData", 1083 "BootServicesCode", 1084 "BootServicesData", 1085 "RuntimeServicesCode", 1086 "RuntimeServicesData", 1087 "ConventionalMemory", 1088 "UnusableMemory", 1089 "ACPIReclaimMemory", 1090 "ACPIMemoryNVS", 1091 "MemoryMappedIO", 1092 "MemoryMappedIOPortSpace", 1093 "PalCode" 1094 }; 1095 1096 /* 1097 * Memory map data provided by UEFI via the GetMemoryMap 1098 * Boot Services API. 1099 */ 1100 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; 1101 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 1102 1103 if (efihdr->descriptor_size == 0) 1104 return; 1105 ndesc = efihdr->memory_size / efihdr->descriptor_size; 1106 1107 if (boothowto & RB_VERBOSE) 1108 printf("%23s %12s %12s %8s %4s\n", 1109 "Type", "Physical", "Virtual", "#Pages", "Attr"); 1110 1111 for (i = 0, p = map; i < ndesc; i++, 1112 p = efi_next_descriptor(p, efihdr->descriptor_size)) { 1113 if (boothowto & RB_VERBOSE) { 1114 if (p->md_type <= EFI_MD_TYPE_PALCODE) 1115 type = types[p->md_type]; 1116 else 1117 type = "<INVALID>"; 1118 printf("%23s %012lx %12p %08lx ", type, p->md_phys, 1119 p->md_virt, p->md_pages); 1120 if (p->md_attr & EFI_MD_ATTR_UC) 1121 printf("UC "); 1122 if (p->md_attr & EFI_MD_ATTR_WC) 1123 printf("WC "); 1124 if (p->md_attr & EFI_MD_ATTR_WT) 1125 printf("WT "); 1126 if (p->md_attr & EFI_MD_ATTR_WB) 1127 printf("WB "); 1128 if (p->md_attr & EFI_MD_ATTR_UCE) 1129 printf("UCE "); 1130 if (p->md_attr & EFI_MD_ATTR_WP) 1131 printf("WP "); 1132 if (p->md_attr & EFI_MD_ATTR_RP) 1133 printf("RP "); 1134 if (p->md_attr & EFI_MD_ATTR_XP) 1135 printf("XP "); 1136 if (p->md_attr & EFI_MD_ATTR_RT) 1137 printf("RUNTIME"); 1138 printf("\n"); 1139 } 1140 1141 switch (p->md_type) { 1142 case EFI_MD_TYPE_CODE: 1143 case EFI_MD_TYPE_DATA: 1144 case EFI_MD_TYPE_BS_CODE: 1145 case EFI_MD_TYPE_BS_DATA: 1146 case EFI_MD_TYPE_FREE: 1147 /* 1148 * We're allowed to use any entry with these types. 1149 */ 1150 break; 1151 default: 1152 continue; 1153 } 1154 1155 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE), 1156 physmap, physmap_idx)) 1157 break; 1158 } 1159} 1160 1161static char bootmethod[16] = ""; 1162SYSCTL_STRING(_machdep, OID_AUTO, bootmethod, CTLFLAG_RD, bootmethod, 0, 1163 "System firmware boot method"); 1164 1165static void 1166native_parse_memmap(caddr_t kmdp, vm_paddr_t *physmap, int *physmap_idx) 1167{ 1168 struct bios_smap *smap; 1169 struct efi_map_header *efihdr; 1170 u_int32_t size; 1171 1172 /* 1173 * Memory map from INT 15:E820. 1174 * 1175 * subr_module.c says: 1176 * "Consumer may safely assume that size value precedes data." 1177 * ie: an int32_t immediately precedes smap. 1178 */ 1179 1180 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 1181 MODINFO_METADATA | MODINFOMD_EFI_MAP); 1182 smap = (struct bios_smap *)preload_search_info(kmdp, 1183 MODINFO_METADATA | MODINFOMD_SMAP); 1184 if (efihdr == NULL && smap == NULL) 1185 panic("No BIOS smap or EFI map info from loader!"); 1186 1187 if (efihdr != NULL) { 1188 add_efi_map_entries(efihdr, physmap, physmap_idx); 1189 strlcpy(bootmethod, "UEFI", sizeof(bootmethod)); 1190 } else { 1191 size = *((u_int32_t *)smap - 1); 1192 bios_add_smap_entries(smap, size, physmap, physmap_idx); 1193 strlcpy(bootmethod, "BIOS", sizeof(bootmethod)); 1194 } 1195} 1196 1197#define PAGES_PER_GB (1024 * 1024 * 1024 / PAGE_SIZE) 1198 1199/* 1200 * Populate the (physmap) array with base/bound pairs describing the 1201 * available physical memory in the system, then test this memory and 1202 * build the phys_avail array describing the actually-available memory. 1203 * 1204 * Total memory size may be set by the kernel environment variable 1205 * hw.physmem or the compile-time define MAXMEM. 1206 * 1207 * XXX first should be vm_paddr_t. 1208 */ 1209static void 1210getmemsize(caddr_t kmdp, u_int64_t first) 1211{ 1212 int i, physmap_idx, pa_indx, da_indx; 1213 vm_paddr_t pa, physmap[PHYSMAP_SIZE]; 1214 u_long physmem_start, physmem_tunable, memtest; 1215 pt_entry_t *pte; 1216 quad_t dcons_addr, dcons_size; 1217 int page_counter; 1218 1219 bzero(physmap, sizeof(physmap)); 1220 physmap_idx = 0; 1221 1222 init_ops.parse_memmap(kmdp, physmap, &physmap_idx); 1223 physmap_idx -= 2; 1224 1225 /* 1226 * Find the 'base memory' segment for SMP 1227 */ 1228 basemem = 0; 1229 for (i = 0; i <= physmap_idx; i += 2) { 1230 if (physmap[i] <= 0xA0000) { 1231 basemem = physmap[i + 1] / 1024; 1232 break; 1233 } 1234 } 1235 if (basemem == 0 || basemem > 640) { 1236 if (bootverbose) 1237 printf( 1238 "Memory map doesn't contain a basemem segment, faking it"); 1239 basemem = 640; 1240 } 1241 1242 /* 1243 * Make hole for "AP -> long mode" bootstrap code. The 1244 * mp_bootaddress vector is only available when the kernel 1245 * is configured to support APs and APs for the system start 1246 * in 32bit mode (e.g. SMP bare metal). 1247 */ 1248 if (init_ops.mp_bootaddress) { 1249 if (physmap[1] >= 0x100000000) 1250 panic( 1251 "Basemem segment is not suitable for AP bootstrap code!"); 1252 physmap[1] = init_ops.mp_bootaddress(physmap[1] / 1024); 1253 } 1254 1255 /* 1256 * Maxmem isn't the "maximum memory", it's one larger than the 1257 * highest page of the physical address space. It should be 1258 * called something like "Maxphyspage". We may adjust this 1259 * based on ``hw.physmem'' and the results of the memory test. 1260 */ 1261 Maxmem = atop(physmap[physmap_idx + 1]); 1262 1263#ifdef MAXMEM 1264 Maxmem = MAXMEM / 4; 1265#endif 1266 1267 if (TUNABLE_ULONG_FETCH("hw.physmem", &physmem_tunable)) 1268 Maxmem = atop(physmem_tunable); 1269 1270 /* 1271 * The boot memory test is disabled by default, as it takes a 1272 * significant amount of time on large-memory systems, and is 1273 * unfriendly to virtual machines as it unnecessarily touches all 1274 * pages. 1275 * 1276 * A general name is used as the code may be extended to support 1277 * additional tests beyond the current "page present" test. 1278 */ 1279 memtest = 0; 1280 TUNABLE_ULONG_FETCH("hw.memtest.tests", &memtest); 1281 1282 /* 1283 * Don't allow MAXMEM or hw.physmem to extend the amount of memory 1284 * in the system. 1285 */ 1286 if (Maxmem > atop(physmap[physmap_idx + 1])) 1287 Maxmem = atop(physmap[physmap_idx + 1]); 1288 1289 if (atop(physmap[physmap_idx + 1]) != Maxmem && 1290 (boothowto & RB_VERBOSE)) 1291 printf("Physical memory use set to %ldK\n", Maxmem * 4); 1292 1293 /* call pmap initialization to make new kernel address space */ 1294 pmap_bootstrap(&first); 1295 1296 /* 1297 * Size up each available chunk of physical memory. 1298 * 1299 * XXX Some BIOSes corrupt low 64KB between suspend and resume. 1300 * By default, mask off the first 16 pages unless we appear to be 1301 * running in a VM. 1302 */ 1303 physmem_start = (vm_guest > VM_GUEST_NO ? 1 : 16) << PAGE_SHIFT; 1304 TUNABLE_ULONG_FETCH("hw.physmem.start", &physmem_start); 1305 if (physmap[0] < physmem_start) { 1306 if (physmem_start < PAGE_SIZE) 1307 physmap[0] = PAGE_SIZE; 1308 else if (physmem_start >= physmap[1]) 1309 physmap[0] = round_page(physmap[1] - PAGE_SIZE); 1310 else 1311 physmap[0] = round_page(physmem_start); 1312 } 1313 pa_indx = 0; 1314 da_indx = 1; 1315 phys_avail[pa_indx++] = physmap[0]; 1316 phys_avail[pa_indx] = physmap[0]; 1317 dump_avail[da_indx] = physmap[0]; 1318 pte = CMAP1; 1319 1320 /* 1321 * Get dcons buffer address 1322 */ 1323 if (getenv_quad("dcons.addr", &dcons_addr) == 0 || 1324 getenv_quad("dcons.size", &dcons_size) == 0) 1325 dcons_addr = 0; 1326 1327 /* 1328 * physmap is in bytes, so when converting to page boundaries, 1329 * round up the start address and round down the end address. 1330 */ 1331 page_counter = 0; 1332 if (memtest != 0) 1333 printf("Testing system memory"); 1334 for (i = 0; i <= physmap_idx; i += 2) { 1335 vm_paddr_t end; 1336 1337 end = ptoa((vm_paddr_t)Maxmem); 1338 if (physmap[i + 1] < end) 1339 end = trunc_page(physmap[i + 1]); 1340 for (pa = round_page(physmap[i]); pa < end; pa += PAGE_SIZE) { 1341 int tmp, page_bad, full; 1342 int *ptr = (int *)CADDR1; 1343 1344 full = FALSE; 1345 /* 1346 * block out kernel memory as not available. 1347 */ 1348 if (pa >= (vm_paddr_t)kernphys && pa < first) 1349 goto do_dump_avail; 1350 1351 /* 1352 * block out dcons buffer 1353 */ 1354 if (dcons_addr > 0 1355 && pa >= trunc_page(dcons_addr) 1356 && pa < dcons_addr + dcons_size) 1357 goto do_dump_avail; 1358 1359 page_bad = FALSE; 1360 if (memtest == 0) 1361 goto skip_memtest; 1362 1363 /* 1364 * Print a "." every GB to show we're making 1365 * progress. 1366 */ 1367 page_counter++; 1368 if ((page_counter % PAGES_PER_GB) == 0) 1369 printf("."); 1370 1371 /* 1372 * map page into kernel: valid, read/write,non-cacheable 1373 */ 1374 *pte = pa | PG_V | PG_RW | PG_NC_PWT | PG_NC_PCD; 1375 invltlb(); 1376 1377 tmp = *(int *)ptr; 1378 /* 1379 * Test for alternating 1's and 0's 1380 */ 1381 *(volatile int *)ptr = 0xaaaaaaaa; 1382 if (*(volatile int *)ptr != 0xaaaaaaaa) 1383 page_bad = TRUE; 1384 /* 1385 * Test for alternating 0's and 1's 1386 */ 1387 *(volatile int *)ptr = 0x55555555; 1388 if (*(volatile int *)ptr != 0x55555555) 1389 page_bad = TRUE; 1390 /* 1391 * Test for all 1's 1392 */ 1393 *(volatile int *)ptr = 0xffffffff; 1394 if (*(volatile int *)ptr != 0xffffffff) 1395 page_bad = TRUE; 1396 /* 1397 * Test for all 0's 1398 */ 1399 *(volatile int *)ptr = 0x0; 1400 if (*(volatile int *)ptr != 0x0) 1401 page_bad = TRUE; 1402 /* 1403 * Restore original value. 1404 */ 1405 *(int *)ptr = tmp; 1406 1407skip_memtest: 1408 /* 1409 * Adjust array of valid/good pages. 1410 */ 1411 if (page_bad == TRUE) 1412 continue; 1413 /* 1414 * If this good page is a continuation of the 1415 * previous set of good pages, then just increase 1416 * the end pointer. Otherwise start a new chunk. 1417 * Note that "end" points one higher than end, 1418 * making the range >= start and < end. 1419 * If we're also doing a speculative memory 1420 * test and we at or past the end, bump up Maxmem 1421 * so that we keep going. The first bad page 1422 * will terminate the loop. 1423 */ 1424 if (phys_avail[pa_indx] == pa) { 1425 phys_avail[pa_indx] += PAGE_SIZE; 1426 } else { 1427 pa_indx++; 1428 if (pa_indx == PHYS_AVAIL_ARRAY_END) { 1429 printf( 1430 "Too many holes in the physical address space, giving up\n"); 1431 pa_indx--; 1432 full = TRUE; 1433 goto do_dump_avail; 1434 } 1435 phys_avail[pa_indx++] = pa; /* start */ 1436 phys_avail[pa_indx] = pa + PAGE_SIZE; /* end */ 1437 } 1438 physmem++; 1439do_dump_avail: 1440 if (dump_avail[da_indx] == pa) { 1441 dump_avail[da_indx] += PAGE_SIZE; 1442 } else { 1443 da_indx++; 1444 if (da_indx == DUMP_AVAIL_ARRAY_END) { 1445 da_indx--; 1446 goto do_next; 1447 } 1448 dump_avail[da_indx++] = pa; /* start */ 1449 dump_avail[da_indx] = pa + PAGE_SIZE; /* end */ 1450 } 1451do_next: 1452 if (full) 1453 break; 1454 } 1455 } 1456 *pte = 0; 1457 invltlb(); 1458 if (memtest != 0) 1459 printf("\n"); 1460 1461 /* 1462 * XXX 1463 * The last chunk must contain at least one page plus the message 1464 * buffer to avoid complicating other code (message buffer address 1465 * calculation, etc.). 1466 */ 1467 while (phys_avail[pa_indx - 1] + PAGE_SIZE + 1468 round_page(msgbufsize) >= phys_avail[pa_indx]) { 1469 physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]); 1470 phys_avail[pa_indx--] = 0; 1471 phys_avail[pa_indx--] = 0; 1472 } 1473 1474 Maxmem = atop(phys_avail[pa_indx]); 1475 1476 /* Trim off space for the message buffer. */ 1477 phys_avail[pa_indx] -= round_page(msgbufsize); 1478 1479 /* Map the message buffer. */ 1480 msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]); 1481} 1482 1483static caddr_t 1484native_parse_preload_data(u_int64_t modulep) 1485{ 1486 caddr_t kmdp; 1487#ifdef DDB 1488 vm_offset_t ksym_start; 1489 vm_offset_t ksym_end; 1490#endif 1491 1492 preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE); 1493 preload_bootstrap_relocate(KERNBASE); 1494 kmdp = preload_search_by_type("elf kernel"); 1495 if (kmdp == NULL) 1496 kmdp = preload_search_by_type("elf64 kernel"); 1497 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 1498 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE; 1499#ifdef DDB 1500 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 1501 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 1502 db_fetch_ksymtab(ksym_start, ksym_end); 1503#endif 1504 efi_systbl = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t); 1505 1506 return (kmdp); 1507} 1508 1509u_int64_t 1510hammer_time(u_int64_t modulep, u_int64_t physfree) 1511{ 1512 caddr_t kmdp; 1513 int gsel_tss, x; 1514 struct pcpu *pc; 1515 struct nmi_pcpu *np; 1516 struct xstate_hdr *xhdr; 1517 u_int64_t msr; 1518 char *env; 1519 size_t kstack0_sz; 1520 1521 /* 1522 * This may be done better later if it gets more high level 1523 * components in it. If so just link td->td_proc here. 1524 */ 1525 proc_linkup0(&proc0, &thread0); 1526 1527 kmdp = init_ops.parse_preload_data(modulep); 1528 1529 /* Init basic tunables, hz etc */ 1530 init_param1(); 1531 1532 thread0.td_kstack = physfree + KERNBASE; 1533 thread0.td_kstack_pages = kstack_pages; 1534 kstack0_sz = thread0.td_kstack_pages * PAGE_SIZE; 1535 bzero((void *)thread0.td_kstack, kstack0_sz); 1536 physfree += kstack0_sz; 1537 1538 /* 1539 * make gdt memory segments 1540 */ 1541 for (x = 0; x < NGDT; x++) { 1542 if (x != GPROC0_SEL && x != (GPROC0_SEL + 1) && 1543 x != GUSERLDT_SEL && x != (GUSERLDT_SEL) + 1) 1544 ssdtosd(&gdt_segs[x], &gdt[x]); 1545 } 1546 gdt_segs[GPROC0_SEL].ssd_base = (uintptr_t)&common_tss[0]; 1547 ssdtosyssd(&gdt_segs[GPROC0_SEL], 1548 (struct system_segment_descriptor *)&gdt[GPROC0_SEL]); 1549 1550 r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1; 1551 r_gdt.rd_base = (long) gdt; 1552 lgdt(&r_gdt); 1553 pc = &__pcpu[0]; 1554 1555 wrmsr(MSR_FSBASE, 0); /* User value */ 1556 wrmsr(MSR_GSBASE, (u_int64_t)pc); 1557 wrmsr(MSR_KGSBASE, 0); /* User value while in the kernel */ 1558 1559 pcpu_init(pc, 0, sizeof(struct pcpu)); 1560 dpcpu_init((void *)(physfree + KERNBASE), 0); 1561 physfree += DPCPU_SIZE; 1562 PCPU_SET(prvspace, pc); 1563 PCPU_SET(curthread, &thread0); 1564 PCPU_SET(tssp, &common_tss[0]); 1565 PCPU_SET(commontssp, &common_tss[0]); 1566 PCPU_SET(tss, (struct system_segment_descriptor *)&gdt[GPROC0_SEL]); 1567 PCPU_SET(ldt, (struct system_segment_descriptor *)&gdt[GUSERLDT_SEL]); 1568 PCPU_SET(fs32p, &gdt[GUFS32_SEL]); 1569 PCPU_SET(gs32p, &gdt[GUGS32_SEL]); 1570 1571 /* 1572 * Initialize mutexes. 1573 * 1574 * icu_lock: in order to allow an interrupt to occur in a critical 1575 * section, to set pcpu->ipending (etc...) properly, we 1576 * must be able to get the icu lock, so it can't be 1577 * under witness. 1578 */ 1579 mutex_init(); 1580 mtx_init(&icu_lock, "icu", NULL, MTX_SPIN | MTX_NOWITNESS); 1581 mtx_init(&dt_lock, "descriptor tables", NULL, MTX_DEF); 1582 1583 /* exceptions */ 1584 for (x = 0; x < NIDT; x++) 1585 setidt(x, &IDTVEC(rsvd), SDT_SYSIGT, SEL_KPL, 0); 1586 setidt(IDT_DE, &IDTVEC(div), SDT_SYSIGT, SEL_KPL, 0); 1587 setidt(IDT_DB, &IDTVEC(dbg), SDT_SYSIGT, SEL_KPL, 0); 1588 setidt(IDT_NMI, &IDTVEC(nmi), SDT_SYSIGT, SEL_KPL, 2); 1589 setidt(IDT_BP, &IDTVEC(bpt), SDT_SYSIGT, SEL_UPL, 0); 1590 setidt(IDT_OF, &IDTVEC(ofl), SDT_SYSIGT, SEL_KPL, 0); 1591 setidt(IDT_BR, &IDTVEC(bnd), SDT_SYSIGT, SEL_KPL, 0); 1592 setidt(IDT_UD, &IDTVEC(ill), SDT_SYSIGT, SEL_KPL, 0); 1593 setidt(IDT_NM, &IDTVEC(dna), SDT_SYSIGT, SEL_KPL, 0); 1594 setidt(IDT_DF, &IDTVEC(dblfault), SDT_SYSIGT, SEL_KPL, 1); 1595 setidt(IDT_FPUGP, &IDTVEC(fpusegm), SDT_SYSIGT, SEL_KPL, 0); 1596 setidt(IDT_TS, &IDTVEC(tss), SDT_SYSIGT, SEL_KPL, 0); 1597 setidt(IDT_NP, &IDTVEC(missing), SDT_SYSIGT, SEL_KPL, 0); 1598 setidt(IDT_SS, &IDTVEC(stk), SDT_SYSIGT, SEL_KPL, 0); 1599 setidt(IDT_GP, &IDTVEC(prot), SDT_SYSIGT, SEL_KPL, 0); 1600 setidt(IDT_PF, &IDTVEC(page), SDT_SYSIGT, SEL_KPL, 0); 1601 setidt(IDT_MF, &IDTVEC(fpu), SDT_SYSIGT, SEL_KPL, 0); 1602 setidt(IDT_AC, &IDTVEC(align), SDT_SYSIGT, SEL_KPL, 0); 1603 setidt(IDT_MC, &IDTVEC(mchk), SDT_SYSIGT, SEL_KPL, 0); 1604 setidt(IDT_XF, &IDTVEC(xmm), SDT_SYSIGT, SEL_KPL, 0); 1605#ifdef KDTRACE_HOOKS 1606 setidt(IDT_DTRACE_RET, &IDTVEC(dtrace_ret), SDT_SYSIGT, SEL_UPL, 0); 1607#endif 1608#ifdef XENHVM 1609 setidt(IDT_EVTCHN, &IDTVEC(xen_intr_upcall), SDT_SYSIGT, SEL_UPL, 0); 1610#endif 1611 1612 r_idt.rd_limit = sizeof(idt0) - 1; 1613 r_idt.rd_base = (long) idt; 1614 lidt(&r_idt); 1615 1616 /* 1617 * Initialize the clock before the console so that console 1618 * initialization can use DELAY(). 1619 */ 1620 clock_init(); 1621 1622 /* 1623 * Use vt(4) by default for UEFI boot (during the sc(4)/vt(4) 1624 * transition). 1625 * Once bootblocks have updated, we can test directly for 1626 * efi_systbl != NULL here... 1627 */ 1628 if (preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP) 1629 != NULL) 1630 vty_set_preferred(VTY_VT); 1631 1632 identify_cpu(); /* Final stage of CPU initialization */ 1633 initializecpu(); /* Initialize CPU registers */ 1634 initializecpucache(); 1635 1636 /* doublefault stack space, runs on ist1 */ 1637 common_tss[0].tss_ist1 = (long)&dblfault_stack[sizeof(dblfault_stack)]; 1638 1639 /* 1640 * NMI stack, runs on ist2. The pcpu pointer is stored just 1641 * above the start of the ist2 stack. 1642 */ 1643 np = ((struct nmi_pcpu *) &nmi0_stack[sizeof(nmi0_stack)]) - 1; 1644 np->np_pcpu = (register_t) pc; 1645 common_tss[0].tss_ist2 = (long) np; 1646 1647 /* Set the IO permission bitmap (empty due to tss seg limit) */ 1648 common_tss[0].tss_iobase = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE; 1649 1650 gsel_tss = GSEL(GPROC0_SEL, SEL_KPL); 1651 ltr(gsel_tss); 1652 1653 /* Set up the fast syscall stuff */ 1654 msr = rdmsr(MSR_EFER) | EFER_SCE; 1655 wrmsr(MSR_EFER, msr); 1656 wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall)); 1657 wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32)); 1658 msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) | 1659 ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48); 1660 wrmsr(MSR_STAR, msr); 1661 wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D); 1662 1663 getmemsize(kmdp, physfree); 1664 init_param2(physmem); 1665 1666 /* now running on new page tables, configured,and u/iom is accessible */ 1667 1668 cninit(); 1669 1670#ifdef DEV_ISA 1671#ifdef DEV_ATPIC 1672 elcr_probe(); 1673 atpic_startup(); 1674#else 1675 /* Reset and mask the atpics and leave them shut down. */ 1676 atpic_reset(); 1677 1678 /* 1679 * Point the ICU spurious interrupt vectors at the APIC spurious 1680 * interrupt handler. 1681 */ 1682 setidt(IDT_IO_INTS + 7, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0); 1683 setidt(IDT_IO_INTS + 15, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0); 1684#endif 1685#else 1686#error "have you forgotten the isa device?"; 1687#endif 1688 1689 kdb_init(); 1690 1691#ifdef KDB 1692 if (boothowto & RB_KDB) 1693 kdb_enter(KDB_WHY_BOOTFLAGS, 1694 "Boot flags requested debugger"); 1695#endif 1696 1697 msgbufinit(msgbufp, msgbufsize); 1698 fpuinit(); 1699 1700 /* 1701 * Set up thread0 pcb after fpuinit calculated pcb + fpu save 1702 * area size. Zero out the extended state header in fpu save 1703 * area. 1704 */ 1705 thread0.td_pcb = get_pcb_td(&thread0); 1706 bzero(get_pcb_user_save_td(&thread0), cpu_max_ext_state_size); 1707 if (use_xsave) { 1708 xhdr = (struct xstate_hdr *)(get_pcb_user_save_td(&thread0) + 1709 1); 1710 xhdr->xstate_bv = xsave_mask; 1711 } 1712 /* make an initial tss so cpu can get interrupt stack on syscall! */ 1713 common_tss[0].tss_rsp0 = (vm_offset_t)thread0.td_pcb; 1714 /* Ensure the stack is aligned to 16 bytes */ 1715 common_tss[0].tss_rsp0 &= ~0xFul; 1716 PCPU_SET(rsp0, common_tss[0].tss_rsp0); 1717 PCPU_SET(curpcb, thread0.td_pcb); 1718 1719 /* transfer to user mode */ 1720 1721 _ucodesel = GSEL(GUCODE_SEL, SEL_UPL); 1722 _udatasel = GSEL(GUDATA_SEL, SEL_UPL); 1723 _ucode32sel = GSEL(GUCODE32_SEL, SEL_UPL); 1724 _ufssel = GSEL(GUFS32_SEL, SEL_UPL); 1725 _ugssel = GSEL(GUGS32_SEL, SEL_UPL); 1726 1727 load_ds(_udatasel); 1728 load_es(_udatasel); 1729 load_fs(_ufssel); 1730 1731 /* setup proc 0's pcb */ 1732 thread0.td_pcb->pcb_flags = 0; 1733 thread0.td_frame = &proc0_tf; 1734 1735 env = kern_getenv("kernelname"); 1736 if (env != NULL) 1737 strlcpy(kernelname, env, sizeof(kernelname)); 1738 1739 cpu_probe_amdc1e(); 1740 1741#ifdef FDT 1742 x86_init_fdt(); 1743#endif 1744 1745 /* Location of kernel stack for locore */ 1746 return ((u_int64_t)thread0.td_pcb); 1747} 1748 1749void 1750cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 1751{ 1752 1753 pcpu->pc_acpi_id = 0xffffffff; 1754} 1755 1756static int 1757smap_sysctl_handler(SYSCTL_HANDLER_ARGS) 1758{ 1759 struct bios_smap *smapbase; 1760 struct bios_smap_xattr smap; 1761 caddr_t kmdp; 1762 uint32_t *smapattr; 1763 int count, error, i; 1764 1765 /* Retrieve the system memory map from the loader. */ 1766 kmdp = preload_search_by_type("elf kernel"); 1767 if (kmdp == NULL) 1768 kmdp = preload_search_by_type("elf64 kernel"); 1769 smapbase = (struct bios_smap *)preload_search_info(kmdp, 1770 MODINFO_METADATA | MODINFOMD_SMAP); 1771 if (smapbase == NULL) 1772 return (0); 1773 smapattr = (uint32_t *)preload_search_info(kmdp, 1774 MODINFO_METADATA | MODINFOMD_SMAP_XATTR); 1775 count = *((uint32_t *)smapbase - 1) / sizeof(*smapbase); 1776 error = 0; 1777 for (i = 0; i < count; i++) { 1778 smap.base = smapbase[i].base; 1779 smap.length = smapbase[i].length; 1780 smap.type = smapbase[i].type; 1781 if (smapattr != NULL) 1782 smap.xattr = smapattr[i]; 1783 else 1784 smap.xattr = 0; 1785 error = SYSCTL_OUT(req, &smap, sizeof(smap)); 1786 } 1787 return (error); 1788} 1789SYSCTL_PROC(_machdep, OID_AUTO, smap, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0, 1790 smap_sysctl_handler, "S,bios_smap_xattr", "Raw BIOS SMAP data"); 1791 1792static int 1793efi_map_sysctl_handler(SYSCTL_HANDLER_ARGS) 1794{ 1795 struct efi_map_header *efihdr; 1796 caddr_t kmdp; 1797 uint32_t efisize; 1798 1799 kmdp = preload_search_by_type("elf kernel"); 1800 if (kmdp == NULL) 1801 kmdp = preload_search_by_type("elf64 kernel"); 1802 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 1803 MODINFO_METADATA | MODINFOMD_EFI_MAP); 1804 if (efihdr == NULL) 1805 return (0); 1806 efisize = *((uint32_t *)efihdr - 1); 1807 return (SYSCTL_OUT(req, efihdr, efisize)); 1808} 1809SYSCTL_PROC(_machdep, OID_AUTO, efi_map, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0, 1810 efi_map_sysctl_handler, "S,efi_map_header", "Raw EFI Memory Map"); 1811 1812void 1813spinlock_enter(void) 1814{ 1815 struct thread *td; 1816 register_t flags; 1817 1818 td = curthread; 1819 if (td->td_md.md_spinlock_count == 0) { 1820 flags = intr_disable(); 1821 td->td_md.md_spinlock_count = 1; 1822 td->td_md.md_saved_flags = flags; 1823 } else 1824 td->td_md.md_spinlock_count++; 1825 critical_enter(); 1826} 1827 1828void 1829spinlock_exit(void) 1830{ 1831 struct thread *td; 1832 register_t flags; 1833 1834 td = curthread; 1835 critical_exit(); 1836 flags = td->td_md.md_saved_flags; 1837 td->td_md.md_spinlock_count--; 1838 if (td->td_md.md_spinlock_count == 0) 1839 intr_restore(flags); 1840} 1841 1842/* 1843 * Construct a PCB from a trapframe. This is called from kdb_trap() where 1844 * we want to start a backtrace from the function that caused us to enter 1845 * the debugger. We have the context in the trapframe, but base the trace 1846 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 1847 * enough for a backtrace. 1848 */ 1849void 1850makectx(struct trapframe *tf, struct pcb *pcb) 1851{ 1852 1853 pcb->pcb_r12 = tf->tf_r12; 1854 pcb->pcb_r13 = tf->tf_r13; 1855 pcb->pcb_r14 = tf->tf_r14; 1856 pcb->pcb_r15 = tf->tf_r15; 1857 pcb->pcb_rbp = tf->tf_rbp; 1858 pcb->pcb_rbx = tf->tf_rbx; 1859 pcb->pcb_rip = tf->tf_rip; 1860 pcb->pcb_rsp = tf->tf_rsp; 1861} 1862 1863int 1864ptrace_set_pc(struct thread *td, unsigned long addr) 1865{ 1866 1867 td->td_frame->tf_rip = addr; 1868 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 1869 return (0); 1870} 1871 1872int 1873ptrace_single_step(struct thread *td) 1874{ 1875 td->td_frame->tf_rflags |= PSL_T; 1876 return (0); 1877} 1878 1879int 1880ptrace_clear_single_step(struct thread *td) 1881{ 1882 td->td_frame->tf_rflags &= ~PSL_T; 1883 return (0); 1884} 1885 1886int 1887fill_regs(struct thread *td, struct reg *regs) 1888{ 1889 struct trapframe *tp; 1890 1891 tp = td->td_frame; 1892 return (fill_frame_regs(tp, regs)); 1893} 1894 1895int 1896fill_frame_regs(struct trapframe *tp, struct reg *regs) 1897{ 1898 regs->r_r15 = tp->tf_r15; 1899 regs->r_r14 = tp->tf_r14; 1900 regs->r_r13 = tp->tf_r13; 1901 regs->r_r12 = tp->tf_r12; 1902 regs->r_r11 = tp->tf_r11; 1903 regs->r_r10 = tp->tf_r10; 1904 regs->r_r9 = tp->tf_r9; 1905 regs->r_r8 = tp->tf_r8; 1906 regs->r_rdi = tp->tf_rdi; 1907 regs->r_rsi = tp->tf_rsi; 1908 regs->r_rbp = tp->tf_rbp; 1909 regs->r_rbx = tp->tf_rbx; 1910 regs->r_rdx = tp->tf_rdx; 1911 regs->r_rcx = tp->tf_rcx; 1912 regs->r_rax = tp->tf_rax; 1913 regs->r_rip = tp->tf_rip; 1914 regs->r_cs = tp->tf_cs; 1915 regs->r_rflags = tp->tf_rflags; 1916 regs->r_rsp = tp->tf_rsp; 1917 regs->r_ss = tp->tf_ss; 1918 if (tp->tf_flags & TF_HASSEGS) { 1919 regs->r_ds = tp->tf_ds; 1920 regs->r_es = tp->tf_es; 1921 regs->r_fs = tp->tf_fs; 1922 regs->r_gs = tp->tf_gs; 1923 } else { 1924 regs->r_ds = 0; 1925 regs->r_es = 0; 1926 regs->r_fs = 0; 1927 regs->r_gs = 0; 1928 } 1929 return (0); 1930} 1931 1932int 1933set_regs(struct thread *td, struct reg *regs) 1934{ 1935 struct trapframe *tp; 1936 register_t rflags; 1937 1938 tp = td->td_frame; 1939 rflags = regs->r_rflags & 0xffffffff; 1940 if (!EFL_SECURE(rflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs)) 1941 return (EINVAL); 1942 tp->tf_r15 = regs->r_r15; 1943 tp->tf_r14 = regs->r_r14; 1944 tp->tf_r13 = regs->r_r13; 1945 tp->tf_r12 = regs->r_r12; 1946 tp->tf_r11 = regs->r_r11; 1947 tp->tf_r10 = regs->r_r10; 1948 tp->tf_r9 = regs->r_r9; 1949 tp->tf_r8 = regs->r_r8; 1950 tp->tf_rdi = regs->r_rdi; 1951 tp->tf_rsi = regs->r_rsi; 1952 tp->tf_rbp = regs->r_rbp; 1953 tp->tf_rbx = regs->r_rbx; 1954 tp->tf_rdx = regs->r_rdx; 1955 tp->tf_rcx = regs->r_rcx; 1956 tp->tf_rax = regs->r_rax; 1957 tp->tf_rip = regs->r_rip; 1958 tp->tf_cs = regs->r_cs; 1959 tp->tf_rflags = rflags; 1960 tp->tf_rsp = regs->r_rsp; 1961 tp->tf_ss = regs->r_ss; 1962 if (0) { /* XXXKIB */ 1963 tp->tf_ds = regs->r_ds; 1964 tp->tf_es = regs->r_es; 1965 tp->tf_fs = regs->r_fs; 1966 tp->tf_gs = regs->r_gs; 1967 tp->tf_flags = TF_HASSEGS; 1968 } 1969 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 1970 return (0); 1971} 1972 1973/* XXX check all this stuff! */ 1974/* externalize from sv_xmm */ 1975static void 1976fill_fpregs_xmm(struct savefpu *sv_xmm, struct fpreg *fpregs) 1977{ 1978 struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env; 1979 struct envxmm *penv_xmm = &sv_xmm->sv_env; 1980 int i; 1981 1982 /* pcb -> fpregs */ 1983 bzero(fpregs, sizeof(*fpregs)); 1984 1985 /* FPU control/status */ 1986 penv_fpreg->en_cw = penv_xmm->en_cw; 1987 penv_fpreg->en_sw = penv_xmm->en_sw; 1988 penv_fpreg->en_tw = penv_xmm->en_tw; 1989 penv_fpreg->en_opcode = penv_xmm->en_opcode; 1990 penv_fpreg->en_rip = penv_xmm->en_rip; 1991 penv_fpreg->en_rdp = penv_xmm->en_rdp; 1992 penv_fpreg->en_mxcsr = penv_xmm->en_mxcsr; 1993 penv_fpreg->en_mxcsr_mask = penv_xmm->en_mxcsr_mask; 1994 1995 /* FPU registers */ 1996 for (i = 0; i < 8; ++i) 1997 bcopy(sv_xmm->sv_fp[i].fp_acc.fp_bytes, fpregs->fpr_acc[i], 10); 1998 1999 /* SSE registers */ 2000 for (i = 0; i < 16; ++i) 2001 bcopy(sv_xmm->sv_xmm[i].xmm_bytes, fpregs->fpr_xacc[i], 16); 2002} 2003 2004/* internalize from fpregs into sv_xmm */ 2005static void 2006set_fpregs_xmm(struct fpreg *fpregs, struct savefpu *sv_xmm) 2007{ 2008 struct envxmm *penv_xmm = &sv_xmm->sv_env; 2009 struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env; 2010 int i; 2011 2012 /* fpregs -> pcb */ 2013 /* FPU control/status */ 2014 penv_xmm->en_cw = penv_fpreg->en_cw; 2015 penv_xmm->en_sw = penv_fpreg->en_sw; 2016 penv_xmm->en_tw = penv_fpreg->en_tw; 2017 penv_xmm->en_opcode = penv_fpreg->en_opcode; 2018 penv_xmm->en_rip = penv_fpreg->en_rip; 2019 penv_xmm->en_rdp = penv_fpreg->en_rdp; 2020 penv_xmm->en_mxcsr = penv_fpreg->en_mxcsr; 2021 penv_xmm->en_mxcsr_mask = penv_fpreg->en_mxcsr_mask & cpu_mxcsr_mask; 2022 2023 /* FPU registers */ 2024 for (i = 0; i < 8; ++i) 2025 bcopy(fpregs->fpr_acc[i], sv_xmm->sv_fp[i].fp_acc.fp_bytes, 10); 2026 2027 /* SSE registers */ 2028 for (i = 0; i < 16; ++i) 2029 bcopy(fpregs->fpr_xacc[i], sv_xmm->sv_xmm[i].xmm_bytes, 16); 2030} 2031 2032/* externalize from td->pcb */ 2033int 2034fill_fpregs(struct thread *td, struct fpreg *fpregs) 2035{ 2036 2037 KASSERT(td == curthread || TD_IS_SUSPENDED(td) || 2038 P_SHOULDSTOP(td->td_proc), 2039 ("not suspended thread %p", td)); 2040 fpugetregs(td); 2041 fill_fpregs_xmm(get_pcb_user_save_td(td), fpregs); 2042 return (0); 2043} 2044 2045/* internalize to td->pcb */ 2046int 2047set_fpregs(struct thread *td, struct fpreg *fpregs) 2048{ 2049 2050 set_fpregs_xmm(fpregs, get_pcb_user_save_td(td)); 2051 fpuuserinited(td); 2052 return (0); 2053} 2054 2055/* 2056 * Get machine context. 2057 */ 2058int 2059get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 2060{ 2061 struct pcb *pcb; 2062 struct trapframe *tp; 2063 2064 pcb = td->td_pcb; 2065 tp = td->td_frame; 2066 PROC_LOCK(curthread->td_proc); 2067 mcp->mc_onstack = sigonstack(tp->tf_rsp); 2068 PROC_UNLOCK(curthread->td_proc); 2069 mcp->mc_r15 = tp->tf_r15; 2070 mcp->mc_r14 = tp->tf_r14; 2071 mcp->mc_r13 = tp->tf_r13; 2072 mcp->mc_r12 = tp->tf_r12; 2073 mcp->mc_r11 = tp->tf_r11; 2074 mcp->mc_r10 = tp->tf_r10; 2075 mcp->mc_r9 = tp->tf_r9; 2076 mcp->mc_r8 = tp->tf_r8; 2077 mcp->mc_rdi = tp->tf_rdi; 2078 mcp->mc_rsi = tp->tf_rsi; 2079 mcp->mc_rbp = tp->tf_rbp; 2080 mcp->mc_rbx = tp->tf_rbx; 2081 mcp->mc_rcx = tp->tf_rcx; 2082 mcp->mc_rflags = tp->tf_rflags; 2083 if (flags & GET_MC_CLEAR_RET) { 2084 mcp->mc_rax = 0; 2085 mcp->mc_rdx = 0; 2086 mcp->mc_rflags &= ~PSL_C; 2087 } else { 2088 mcp->mc_rax = tp->tf_rax; 2089 mcp->mc_rdx = tp->tf_rdx; 2090 } 2091 mcp->mc_rip = tp->tf_rip; 2092 mcp->mc_cs = tp->tf_cs; 2093 mcp->mc_rsp = tp->tf_rsp; 2094 mcp->mc_ss = tp->tf_ss; 2095 mcp->mc_ds = tp->tf_ds; 2096 mcp->mc_es = tp->tf_es; 2097 mcp->mc_fs = tp->tf_fs; 2098 mcp->mc_gs = tp->tf_gs; 2099 mcp->mc_flags = tp->tf_flags; 2100 mcp->mc_len = sizeof(*mcp); 2101 get_fpcontext(td, mcp, NULL, 0); 2102 mcp->mc_fsbase = pcb->pcb_fsbase; 2103 mcp->mc_gsbase = pcb->pcb_gsbase; 2104 mcp->mc_xfpustate = 0; 2105 mcp->mc_xfpustate_len = 0; 2106 bzero(mcp->mc_spare, sizeof(mcp->mc_spare)); 2107 return (0); 2108} 2109 2110/* 2111 * Set machine context. 2112 * 2113 * However, we don't set any but the user modifiable flags, and we won't 2114 * touch the cs selector. 2115 */ 2116int 2117set_mcontext(struct thread *td, mcontext_t *mcp) 2118{ 2119 struct pcb *pcb; 2120 struct trapframe *tp; 2121 char *xfpustate; 2122 long rflags; 2123 int ret; 2124 2125 pcb = td->td_pcb; 2126 tp = td->td_frame; 2127 if (mcp->mc_len != sizeof(*mcp) || 2128 (mcp->mc_flags & ~_MC_FLAG_MASK) != 0) 2129 return (EINVAL); 2130 rflags = (mcp->mc_rflags & PSL_USERCHANGE) | 2131 (tp->tf_rflags & ~PSL_USERCHANGE); 2132 if (mcp->mc_flags & _MC_HASFPXSTATE) { 2133 if (mcp->mc_xfpustate_len > cpu_max_ext_state_size - 2134 sizeof(struct savefpu)) 2135 return (EINVAL); 2136 xfpustate = __builtin_alloca(mcp->mc_xfpustate_len); 2137 ret = copyin((void *)mcp->mc_xfpustate, xfpustate, 2138 mcp->mc_xfpustate_len); 2139 if (ret != 0) 2140 return (ret); 2141 } else 2142 xfpustate = NULL; 2143 ret = set_fpcontext(td, mcp, xfpustate, mcp->mc_xfpustate_len); 2144 if (ret != 0) 2145 return (ret); 2146 tp->tf_r15 = mcp->mc_r15; 2147 tp->tf_r14 = mcp->mc_r14; 2148 tp->tf_r13 = mcp->mc_r13; 2149 tp->tf_r12 = mcp->mc_r12; 2150 tp->tf_r11 = mcp->mc_r11; 2151 tp->tf_r10 = mcp->mc_r10; 2152 tp->tf_r9 = mcp->mc_r9; 2153 tp->tf_r8 = mcp->mc_r8; 2154 tp->tf_rdi = mcp->mc_rdi; 2155 tp->tf_rsi = mcp->mc_rsi; 2156 tp->tf_rbp = mcp->mc_rbp; 2157 tp->tf_rbx = mcp->mc_rbx; 2158 tp->tf_rdx = mcp->mc_rdx; 2159 tp->tf_rcx = mcp->mc_rcx; 2160 tp->tf_rax = mcp->mc_rax; 2161 tp->tf_rip = mcp->mc_rip; 2162 tp->tf_rflags = rflags; 2163 tp->tf_rsp = mcp->mc_rsp; 2164 tp->tf_ss = mcp->mc_ss; 2165 tp->tf_flags = mcp->mc_flags; 2166 if (tp->tf_flags & TF_HASSEGS) { 2167 tp->tf_ds = mcp->mc_ds; 2168 tp->tf_es = mcp->mc_es; 2169 tp->tf_fs = mcp->mc_fs; 2170 tp->tf_gs = mcp->mc_gs; 2171 } 2172 if (mcp->mc_flags & _MC_HASBASES) { 2173 pcb->pcb_fsbase = mcp->mc_fsbase; 2174 pcb->pcb_gsbase = mcp->mc_gsbase; 2175 } 2176 set_pcb_flags(pcb, PCB_FULL_IRET); 2177 return (0); 2178} 2179 2180static void 2181get_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpusave, 2182 size_t xfpusave_len) 2183{ 2184 size_t max_len, len; 2185 2186 mcp->mc_ownedfp = fpugetregs(td); 2187 bcopy(get_pcb_user_save_td(td), &mcp->mc_fpstate[0], 2188 sizeof(mcp->mc_fpstate)); 2189 mcp->mc_fpformat = fpuformat(); 2190 if (!use_xsave || xfpusave_len == 0) 2191 return; 2192 max_len = cpu_max_ext_state_size - sizeof(struct savefpu); 2193 len = xfpusave_len; 2194 if (len > max_len) { 2195 len = max_len; 2196 bzero(xfpusave + max_len, len - max_len); 2197 } 2198 mcp->mc_flags |= _MC_HASFPXSTATE; 2199 mcp->mc_xfpustate_len = len; 2200 bcopy(get_pcb_user_save_td(td) + 1, xfpusave, len); 2201} 2202 2203static int 2204set_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpustate, 2205 size_t xfpustate_len) 2206{ 2207 struct savefpu *fpstate; 2208 int error; 2209 2210 if (mcp->mc_fpformat == _MC_FPFMT_NODEV) 2211 return (0); 2212 else if (mcp->mc_fpformat != _MC_FPFMT_XMM) 2213 return (EINVAL); 2214 else if (mcp->mc_ownedfp == _MC_FPOWNED_NONE) { 2215 /* We don't care what state is left in the FPU or PCB. */ 2216 fpstate_drop(td); 2217 error = 0; 2218 } else if (mcp->mc_ownedfp == _MC_FPOWNED_FPU || 2219 mcp->mc_ownedfp == _MC_FPOWNED_PCB) { 2220 fpstate = (struct savefpu *)&mcp->mc_fpstate; 2221 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask; 2222 error = fpusetregs(td, fpstate, xfpustate, xfpustate_len); 2223 } else 2224 return (EINVAL); 2225 return (error); 2226} 2227 2228void 2229fpstate_drop(struct thread *td) 2230{ 2231 2232 KASSERT(PCB_USER_FPU(td->td_pcb), ("fpstate_drop: kernel-owned fpu")); 2233 critical_enter(); 2234 if (PCPU_GET(fpcurthread) == td) 2235 fpudrop(); 2236 /* 2237 * XXX force a full drop of the fpu. The above only drops it if we 2238 * owned it. 2239 * 2240 * XXX I don't much like fpugetuserregs()'s semantics of doing a full 2241 * drop. Dropping only to the pcb matches fnsave's behaviour. 2242 * We only need to drop to !PCB_INITDONE in sendsig(). But 2243 * sendsig() is the only caller of fpugetuserregs()... perhaps we just 2244 * have too many layers. 2245 */ 2246 clear_pcb_flags(curthread->td_pcb, 2247 PCB_FPUINITDONE | PCB_USERFPUINITDONE); 2248 critical_exit(); 2249} 2250 2251int 2252fill_dbregs(struct thread *td, struct dbreg *dbregs) 2253{ 2254 struct pcb *pcb; 2255 2256 if (td == NULL) { 2257 dbregs->dr[0] = rdr0(); 2258 dbregs->dr[1] = rdr1(); 2259 dbregs->dr[2] = rdr2(); 2260 dbregs->dr[3] = rdr3(); 2261 dbregs->dr[6] = rdr6(); 2262 dbregs->dr[7] = rdr7(); 2263 } else { 2264 pcb = td->td_pcb; 2265 dbregs->dr[0] = pcb->pcb_dr0; 2266 dbregs->dr[1] = pcb->pcb_dr1; 2267 dbregs->dr[2] = pcb->pcb_dr2; 2268 dbregs->dr[3] = pcb->pcb_dr3; 2269 dbregs->dr[6] = pcb->pcb_dr6; 2270 dbregs->dr[7] = pcb->pcb_dr7; 2271 } 2272 dbregs->dr[4] = 0; 2273 dbregs->dr[5] = 0; 2274 dbregs->dr[8] = 0; 2275 dbregs->dr[9] = 0; 2276 dbregs->dr[10] = 0; 2277 dbregs->dr[11] = 0; 2278 dbregs->dr[12] = 0; 2279 dbregs->dr[13] = 0; 2280 dbregs->dr[14] = 0; 2281 dbregs->dr[15] = 0; 2282 return (0); 2283} 2284 2285int 2286set_dbregs(struct thread *td, struct dbreg *dbregs) 2287{ 2288 struct pcb *pcb; 2289 int i; 2290 2291 if (td == NULL) { 2292 load_dr0(dbregs->dr[0]); 2293 load_dr1(dbregs->dr[1]); 2294 load_dr2(dbregs->dr[2]); 2295 load_dr3(dbregs->dr[3]); 2296 load_dr6(dbregs->dr[6]); 2297 load_dr7(dbregs->dr[7]); 2298 } else { 2299 /* 2300 * Don't let an illegal value for dr7 get set. Specifically, 2301 * check for undefined settings. Setting these bit patterns 2302 * result in undefined behaviour and can lead to an unexpected 2303 * TRCTRAP or a general protection fault right here. 2304 * Upper bits of dr6 and dr7 must not be set 2305 */ 2306 for (i = 0; i < 4; i++) { 2307 if (DBREG_DR7_ACCESS(dbregs->dr[7], i) == 0x02) 2308 return (EINVAL); 2309 if (td->td_frame->tf_cs == _ucode32sel && 2310 DBREG_DR7_LEN(dbregs->dr[7], i) == DBREG_DR7_LEN_8) 2311 return (EINVAL); 2312 } 2313 if ((dbregs->dr[6] & 0xffffffff00000000ul) != 0 || 2314 (dbregs->dr[7] & 0xffffffff00000000ul) != 0) 2315 return (EINVAL); 2316 2317 pcb = td->td_pcb; 2318 2319 /* 2320 * Don't let a process set a breakpoint that is not within the 2321 * process's address space. If a process could do this, it 2322 * could halt the system by setting a breakpoint in the kernel 2323 * (if ddb was enabled). Thus, we need to check to make sure 2324 * that no breakpoints are being enabled for addresses outside 2325 * process's address space. 2326 * 2327 * XXX - what about when the watched area of the user's 2328 * address space is written into from within the kernel 2329 * ... wouldn't that still cause a breakpoint to be generated 2330 * from within kernel mode? 2331 */ 2332 2333 if (DBREG_DR7_ENABLED(dbregs->dr[7], 0)) { 2334 /* dr0 is enabled */ 2335 if (dbregs->dr[0] >= VM_MAXUSER_ADDRESS) 2336 return (EINVAL); 2337 } 2338 if (DBREG_DR7_ENABLED(dbregs->dr[7], 1)) { 2339 /* dr1 is enabled */ 2340 if (dbregs->dr[1] >= VM_MAXUSER_ADDRESS) 2341 return (EINVAL); 2342 } 2343 if (DBREG_DR7_ENABLED(dbregs->dr[7], 2)) { 2344 /* dr2 is enabled */ 2345 if (dbregs->dr[2] >= VM_MAXUSER_ADDRESS) 2346 return (EINVAL); 2347 } 2348 if (DBREG_DR7_ENABLED(dbregs->dr[7], 3)) { 2349 /* dr3 is enabled */ 2350 if (dbregs->dr[3] >= VM_MAXUSER_ADDRESS) 2351 return (EINVAL); 2352 } 2353 2354 pcb->pcb_dr0 = dbregs->dr[0]; 2355 pcb->pcb_dr1 = dbregs->dr[1]; 2356 pcb->pcb_dr2 = dbregs->dr[2]; 2357 pcb->pcb_dr3 = dbregs->dr[3]; 2358 pcb->pcb_dr6 = dbregs->dr[6]; 2359 pcb->pcb_dr7 = dbregs->dr[7]; 2360 2361 set_pcb_flags(pcb, PCB_DBREGS); 2362 } 2363 2364 return (0); 2365} 2366 2367void 2368reset_dbregs(void) 2369{ 2370 2371 load_dr7(0); /* Turn off the control bits first */ 2372 load_dr0(0); 2373 load_dr1(0); 2374 load_dr2(0); 2375 load_dr3(0); 2376 load_dr6(0); 2377} 2378 2379/* 2380 * Return > 0 if a hardware breakpoint has been hit, and the 2381 * breakpoint was in user space. Return 0, otherwise. 2382 */ 2383int 2384user_dbreg_trap(void) 2385{ 2386 u_int64_t dr7, dr6; /* debug registers dr6 and dr7 */ 2387 u_int64_t bp; /* breakpoint bits extracted from dr6 */ 2388 int nbp; /* number of breakpoints that triggered */ 2389 caddr_t addr[4]; /* breakpoint addresses */ 2390 int i; 2391 2392 dr7 = rdr7(); 2393 if ((dr7 & 0x000000ff) == 0) { 2394 /* 2395 * all GE and LE bits in the dr7 register are zero, 2396 * thus the trap couldn't have been caused by the 2397 * hardware debug registers 2398 */ 2399 return 0; 2400 } 2401 2402 nbp = 0; 2403 dr6 = rdr6(); 2404 bp = dr6 & 0x0000000f; 2405 2406 if (!bp) { 2407 /* 2408 * None of the breakpoint bits are set meaning this 2409 * trap was not caused by any of the debug registers 2410 */ 2411 return 0; 2412 } 2413 2414 /* 2415 * at least one of the breakpoints were hit, check to see 2416 * which ones and if any of them are user space addresses 2417 */ 2418 2419 if (bp & 0x01) { 2420 addr[nbp++] = (caddr_t)rdr0(); 2421 } 2422 if (bp & 0x02) { 2423 addr[nbp++] = (caddr_t)rdr1(); 2424 } 2425 if (bp & 0x04) { 2426 addr[nbp++] = (caddr_t)rdr2(); 2427 } 2428 if (bp & 0x08) { 2429 addr[nbp++] = (caddr_t)rdr3(); 2430 } 2431 2432 for (i = 0; i < nbp; i++) { 2433 if (addr[i] < (caddr_t)VM_MAXUSER_ADDRESS) { 2434 /* 2435 * addr[i] is in user space 2436 */ 2437 return nbp; 2438 } 2439 } 2440 2441 /* 2442 * None of the breakpoints are in user space. 2443 */ 2444 return 0; 2445} 2446 2447#ifdef KDB 2448 2449/* 2450 * Provide inb() and outb() as functions. They are normally only available as 2451 * inline functions, thus cannot be called from the debugger. 2452 */ 2453 2454/* silence compiler warnings */ 2455u_char inb_(u_short); 2456void outb_(u_short, u_char); 2457 2458u_char 2459inb_(u_short port) 2460{ 2461 return inb(port); 2462} 2463 2464void 2465outb_(u_short port, u_char data) 2466{ 2467 outb(port, data); 2468} 2469 2470#endif /* KDB */ 2471