Index: stable/11/sys/dev/efidev/efirt.c =================================================================== --- stable/11/sys/dev/efidev/efirt.c (revision 350355) +++ stable/11/sys/dev/efidev/efirt.c (revision 350356) @@ -1,468 +1,474 @@ /*- * Copyright (c) 2004 Marcel Moolenaar * Copyright (c) 2001 Doug Rabson * Copyright (c) 2016 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Konstantin Belousov * under sponsorship from the FreeBSD Foundation. * * 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. * * 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static struct efi_systbl *efi_systbl; /* * The following pointers point to tables in the EFI runtime service data pages. * Care should be taken to make sure that we've properly entered the EFI runtime * environment (efi_enter()) before dereferencing them. */ static struct efi_cfgtbl *efi_cfgtbl; static struct efi_rt *efi_runtime; static int efi_status2err[25] = { 0, /* EFI_SUCCESS */ ENOEXEC, /* EFI_LOAD_ERROR */ EINVAL, /* EFI_INVALID_PARAMETER */ ENOSYS, /* EFI_UNSUPPORTED */ EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */ EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */ EBUSY, /* EFI_NOT_READY */ EIO, /* EFI_DEVICE_ERROR */ EROFS, /* EFI_WRITE_PROTECTED */ EAGAIN, /* EFI_OUT_OF_RESOURCES */ EIO, /* EFI_VOLUME_CORRUPTED */ ENOSPC, /* EFI_VOLUME_FULL */ ENXIO, /* EFI_NO_MEDIA */ ESTALE, /* EFI_MEDIA_CHANGED */ ENOENT, /* EFI_NOT_FOUND */ EACCES, /* EFI_ACCESS_DENIED */ ETIMEDOUT, /* EFI_NO_RESPONSE */ EADDRNOTAVAIL, /* EFI_NO_MAPPING */ ETIMEDOUT, /* EFI_TIMEOUT */ EDOOFUS, /* EFI_NOT_STARTED */ EALREADY, /* EFI_ALREADY_STARTED */ ECANCELED, /* EFI_ABORTED */ EPROTO, /* EFI_ICMP_ERROR */ EPROTO, /* EFI_TFTP_ERROR */ EPROTO /* EFI_PROTOCOL_ERROR */ }; static int efi_enter(void); static void efi_leave(void); static int efi_status_to_errno(efi_status status) { u_long code; code = status & 0x3ffffffffffffffful; return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS); } static struct mtx efi_lock; static bool efi_is_in_map(struct efi_md *map, int ndesc, int descsz, vm_offset_t addr) { struct efi_md *p; int i; for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p, descsz)) { if ((p->md_attr & EFI_MD_ATTR_RT) == 0) continue; if (addr >= (uintptr_t)p->md_virt && addr < (uintptr_t)p->md_virt + p->md_pages * PAGE_SIZE) return (true); } return (false); } static int efi_init(void) { struct efi_map_header *efihdr; struct efi_md *map; struct efi_rt *rtdm; caddr_t kmdp; size_t efisz; int ndesc, rt_disabled; rt_disabled = 0; TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled); if (rt_disabled == 1) return (0); mtx_init(&efi_lock, "efi", NULL, MTX_DEF); if (efi_systbl_phys == 0) { if (bootverbose) printf("EFI systbl not available\n"); return (0); } efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys); if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) { efi_systbl = NULL; if (bootverbose) printf("EFI systbl signature invalid\n"); return (0); } efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL : (struct efi_cfgtbl *)efi_systbl->st_cfgtbl; if (efi_cfgtbl == NULL) { if (bootverbose) printf("EFI config table is not present\n"); } kmdp = preload_search_by_type("elf kernel"); if (kmdp == NULL) kmdp = preload_search_by_type("elf64 kernel"); efihdr = (struct efi_map_header *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP); if (efihdr == NULL) { if (bootverbose) printf("EFI map is not present\n"); return (0); } efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; map = (struct efi_md *)((uint8_t *)efihdr + efisz); if (efihdr->descriptor_size == 0) return (ENOMEM); ndesc = efihdr->memory_size / efihdr->descriptor_size; if (!efi_create_1t1_map(map, ndesc, efihdr->descriptor_size)) { if (bootverbose) printf("EFI cannot create runtime map\n"); return (ENOMEM); } efi_runtime = (efi_systbl->st_rt == 0) ? NULL : (struct efi_rt *)efi_systbl->st_rt; if (efi_runtime == NULL) { if (bootverbose) printf("EFI runtime services table is not present\n"); efi_destroy_1t1_map(); return (ENXIO); } #if defined(__aarch64__) || defined(__amd64__) /* * Some UEFI implementations have multiple implementations of the * RS->GetTime function. They switch from one we can only use early * in the boot process to one valid as a RunTime service only when we * call RS->SetVirtualAddressMap. As this is not always the case, e.g. * with an old loader.efi, check if the RS->GetTime function is within * the EFI map, and fail to attach if not. */ rtdm = (struct efi_rt *)efi_phys_to_kva((uintptr_t)efi_runtime); if (rtdm == NULL || !efi_is_in_map(map, ndesc, efihdr->descriptor_size, (vm_offset_t)rtdm->rt_gettime)) { if (bootverbose) printf( "EFI runtime services table has an invalid pointer\n"); efi_runtime = NULL; efi_destroy_1t1_map(); return (ENXIO); } #endif return (0); } static void efi_uninit(void) { /* Most likely disabled by tunable */ if (efi_runtime == NULL) return; efi_destroy_1t1_map(); efi_systbl = NULL; efi_cfgtbl = NULL; efi_runtime = NULL; mtx_destroy(&efi_lock); } int efi_rt_ok(void) { if (efi_runtime == NULL) return (ENXIO); return (0); } static int efi_enter(void) { struct thread *td; pmap_t curpmap; int error; if (efi_runtime == NULL) return (ENXIO); td = curthread; curpmap = &td->td_proc->p_vmspace->vm_pmap; PMAP_LOCK(curpmap); mtx_lock(&efi_lock); error = fpu_kern_enter(td, NULL, FPU_KERN_NOCTX); if (error != 0) { PMAP_UNLOCK(curpmap); return (error); } - return (efi_arch_enter()); + error = efi_arch_enter(); + if (error != 0) { + fpu_kern_leave(td, NULL); + mtx_unlock(&efi_lock); + PMAP_UNLOCK(curpmap); + } + return (error); } static void efi_leave(void) { struct thread *td; pmap_t curpmap; efi_arch_leave(); curpmap = &curproc->p_vmspace->vm_pmap; td = curthread; fpu_kern_leave(td, NULL); mtx_unlock(&efi_lock); PMAP_UNLOCK(curpmap); } int efi_get_table(struct uuid *uuid, void **ptr) { struct efi_cfgtbl *ct; u_long count; if (efi_cfgtbl == NULL || efi_systbl == NULL) return (ENXIO); count = efi_systbl->st_entries; ct = efi_cfgtbl; while (count--) { if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) { *ptr = (void *)efi_phys_to_kva(ct->ct_data); return (0); } ct++; } return (ENOENT); } static int efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap) { efi_status status; int error; EFI_TIME_OWNED(); error = efi_enter(); if (error != 0) return (error); status = efi_runtime->rt_gettime(tm, tmcap); efi_leave(); error = efi_status_to_errno(status); return (error); } int efi_get_time(struct efi_tm *tm) { struct efi_tmcap dummy; int error; if (efi_runtime == NULL) return (ENXIO); EFI_TIME_LOCK(); /* * UEFI spec states that the Capabilities argument to GetTime is * optional, but some UEFI implementations choke when passed a NULL * pointer. Pass a dummy efi_tmcap, even though we won't use it, * to workaround such implementations. */ error = efi_get_time_locked(tm, &dummy); EFI_TIME_UNLOCK(); return (error); } int efi_get_time_capabilities(struct efi_tmcap *tmcap) { struct efi_tm dummy; int error; if (efi_runtime == NULL) return (ENXIO); EFI_TIME_LOCK(); error = efi_get_time_locked(&dummy, tmcap); EFI_TIME_UNLOCK(); return (error); } int efi_reset_system(void) { int error; error = efi_enter(); if (error != 0) return (error); efi_runtime->rt_reset(EFI_RESET_WARM, 0, 0, NULL); efi_leave(); return (EIO); } static int efi_set_time_locked(struct efi_tm *tm) { efi_status status; int error; EFI_TIME_OWNED(); error = efi_enter(); if (error != 0) return (error); status = efi_runtime->rt_settime(tm); efi_leave(); error = efi_status_to_errno(status); return (error); } int efi_set_time(struct efi_tm *tm) { int error; if (efi_runtime == NULL) return (ENXIO); EFI_TIME_LOCK(); error = efi_set_time_locked(tm); EFI_TIME_UNLOCK(); return (error); } int efi_var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib, size_t *datasize, void *data) { efi_status status; int error; error = efi_enter(); if (error != 0) return (error); status = efi_runtime->rt_getvar(name, vendor, attrib, datasize, data); efi_leave(); error = efi_status_to_errno(status); return (error); } int efi_var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor) { efi_status status; int error; error = efi_enter(); if (error != 0) return (error); status = efi_runtime->rt_scanvar(namesize, name, vendor); efi_leave(); error = efi_status_to_errno(status); return (error); } int efi_var_set(efi_char *name, struct uuid *vendor, uint32_t attrib, size_t datasize, void *data) { efi_status status; int error; error = efi_enter(); if (error != 0) return (error); status = efi_runtime->rt_setvar(name, vendor, attrib, datasize, data); efi_leave(); error = efi_status_to_errno(status); return (error); } static int efirt_modevents(module_t m, int event, void *arg __unused) { switch (event) { case MOD_LOAD: return (efi_init()); case MOD_UNLOAD: efi_uninit(); return (0); case MOD_SHUTDOWN: return (0); default: return (EOPNOTSUPP); } } static moduledata_t efirt_moddata = { .name = "efirt", .evhand = efirt_modevents, .priv = NULL, }; /* After fpuinitstate, before efidev */ DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND); MODULE_VERSION(efirt, 1); Index: stable/11 =================================================================== --- stable/11 (revision 350355) +++ stable/11 (revision 350356) Property changes on: stable/11 ___________________________________________________________________ Modified: svn:mergeinfo ## -0,0 +0,1 ## Merged /head:r348541