/* * Copyright (c) 2003-2020 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Here's what to do if you want to add a new routine to the comm page: * * 1. Add a definition for it's address in osfmk/i386/cpu_capabilities.h, * being careful to reserve room for future expansion. * * 2. Write one or more versions of the routine, each with it's own * commpage_descriptor. The tricky part is getting the "special", * "musthave", and "canthave" fields right, so that exactly one * version of the routine is selected for every machine. * The source files should be in osfmk/i386/commpage/. * * 3. Add a ptr to your new commpage_descriptor(s) in the "routines" * array in osfmk/i386/commpage/commpage_asm.s. There are two * arrays, one for the 32-bit and one for the 64-bit commpage. * * 4. Write the code in Libc to use the new routine. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if CONFIG_ATM #include #endif /* the lists of commpage routines are in commpage_asm.s */ extern commpage_descriptor* commpage_32_routines[]; extern commpage_descriptor* commpage_64_routines[]; extern vm_map_t commpage32_map; // the shared submap, set up in vm init extern vm_map_t commpage64_map; // the shared submap, set up in vm init extern vm_map_t commpage_text32_map; // the shared submap, set up in vm init extern vm_map_t commpage_text64_map; // the shared submap, set up in vm init char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage char *commPagePtr64 = NULL; // ...and of 64-bit commpage char *commPageTextPtr32 = NULL; // virtual addr in kernel map of 32-bit commpage char *commPageTextPtr64 = NULL; // ...and of 64-bit commpage uint64_t _cpu_capabilities = 0; // define the capability vector typedef uint32_t commpage_address_t; static commpage_address_t next; // next available address in comm page static char *commPagePtr; // virtual addr in kernel map of commpage we are working on static commpage_address_t commPageBaseOffset; // subtract from 32-bit runtime address to get offset in virtual commpage in kernel map static commpage_time_data *time_data32 = NULL; static commpage_time_data *time_data64 = NULL; static new_commpage_timeofday_data_t *gtod_time_data32 = NULL; static new_commpage_timeofday_data_t *gtod_time_data64 = NULL; decl_simple_lock_data(static, commpage_active_cpus_lock); /* Allocate the commpage and add to the shared submap created by vm: * 1. allocate a page in the kernel map (RW) * 2. wire it down * 3. make a memory entry out of it * 4. map that entry into the shared comm region map (R-only) */ static void* commpage_allocate( vm_map_t submap, // commpage32_map or commpage_map64 size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED vm_prot_t uperm) { mach_vm_offset_t kernel_addr = 0; // address of commpage in kernel map mach_vm_offset_t zero = 0; vm_size_t size = area_used; // size actually populated vm_map_entry_t entry; ipc_port_t handle; kern_return_t kr; vm_map_kernel_flags_t vmk_flags; if (submap == NULL) { panic("commpage submap is null"); } kr = mach_vm_map_kernel(kernel_map, &kernel_addr, area_used, 0, VM_MAP_KERNEL_FLAGS_ANYWHERE(.vm_tag = VM_KERN_MEMORY_OSFMK), NULL, 0, FALSE, VM_PROT_ALL, VM_PROT_ALL, VM_INHERIT_NONE); if (kr != KERN_SUCCESS) { panic("cannot allocate commpage %d", kr); } if ((kr = vm_map_wire_kernel(kernel_map, kernel_addr, kernel_addr + area_used, VM_PROT_DEFAULT, VM_KERN_MEMORY_OSFMK, FALSE))) { panic("cannot wire commpage: %d", kr); } /* * Now that the object is created and wired into the kernel map, mark it so that no delay * copy-on-write will ever be performed on it as a result of mapping it into user-space. * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and * that would be a real disaster. * * JMM - What we really need is a way to create it like this in the first place. */ if (!(kr = vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr, VM_MAP_PAGE_MASK(kernel_map)), &entry) || entry->is_sub_map)) { panic("cannot find commpage entry %d", kr); } VME_OBJECT(entry)->copy_strategy = MEMORY_OBJECT_COPY_NONE; if ((kr = mach_make_memory_entry( kernel_map, // target map &size, // size kernel_addr, // offset (address in kernel map) uperm, // protections as specified &handle, // this is the object handle we get NULL ))) { // parent_entry (what is this?) panic("cannot make entry for commpage %d", kr); } vmk_flags = VM_MAP_KERNEL_FLAGS_FIXED(); if (uperm == (VM_PROT_READ | VM_PROT_EXECUTE)) { /* * Mark this unsigned executable mapping as "jit" to avoid * code-signing violations when attempting to execute unsigned * code. */ vmk_flags.vmkf_map_jit = TRUE; } kr = mach_vm_map_kernel( submap, // target map (shared submap) &zero, // address (map into 1st page in submap) area_used, // size 0, // mask vmk_flags, handle, // port is the memory entry we just made 0, // offset (map 1st page in memory entry) FALSE, // copy uperm, // cur_protection (R-only in user map) uperm, // max_protection VM_INHERIT_SHARE); // inheritance if (kr != KERN_SUCCESS) { panic("cannot map commpage %d", kr); } ipc_port_release(handle); /* Make the kernel mapping non-executable. This cannot be done * at the time of map entry creation as mach_make_memory_entry * cannot handle disjoint permissions at this time. */ kr = vm_protect(kernel_map, kernel_addr, area_used, FALSE, VM_PROT_READ | VM_PROT_WRITE); assert(kr == KERN_SUCCESS); return (void*)(intptr_t)kernel_addr; // return address in kernel map } /* Get address (in kernel map) of a commpage field. */ static void* commpage_addr_of( commpage_address_t addr_at_runtime ) { return (void*) ((uintptr_t)commPagePtr + (addr_at_runtime - commPageBaseOffset)); } /* * Calculate address of data within 32- and 64-bit commpages (not to be used with commpage * text). */ static void* commpage_specific_addr_of(char *commPageBase, commpage_address_t addr_at_runtime) { /* * Note that the base address (_COMM_PAGE32_BASE_ADDRESS) is the same for * 32- and 64-bit commpages */ return (void*) ((uintptr_t)commPageBase + (addr_at_runtime - _COMM_PAGE32_BASE_ADDRESS)); } /* Determine number of CPUs on this system. We cannot rely on * machine_info.max_cpus this early in the boot. */ static int commpage_cpus( void ) { unsigned int cpus; cpus = ml_wait_max_cpus(); // NB: this call can block if (cpus == 0) { panic("commpage cpus==0"); } if (cpus > 0xFF) { cpus = 0xFF; } return cpus; } /* Initialize kernel version of _cpu_capabilities vector (used by KEXTs.) */ static void commpage_init_cpu_capabilities( void ) { uint64_t bits; int cpus; ml_cpu_info_t cpu_info; bits = 0; ml_cpu_get_info(&cpu_info); switch (cpu_info.vector_unit) { case 9: bits |= kHasAVX1_0; OS_FALLTHROUGH; case 8: bits |= kHasSSE4_2; OS_FALLTHROUGH; case 7: bits |= kHasSSE4_1; OS_FALLTHROUGH; case 6: bits |= kHasSupplementalSSE3; OS_FALLTHROUGH; case 5: bits |= kHasSSE3; OS_FALLTHROUGH; case 4: bits |= kHasSSE2; OS_FALLTHROUGH; case 3: bits |= kHasSSE; OS_FALLTHROUGH; case 2: bits |= kHasMMX; OS_FALLTHROUGH; default: break; } switch (cpu_info.cache_line_size) { case 128: bits |= kCache128; break; case 64: bits |= kCache64; break; case 32: bits |= kCache32; break; default: break; } cpus = commpage_cpus(); // how many CPUs do we have bits |= (cpus << kNumCPUsShift); bits |= kFastThreadLocalStorage; // we use %gs for TLS #define setif(_bits, _bit, _condition) \ if (_condition) _bits |= _bit setif(bits, kUP, cpus == 1); setif(bits, k64Bit, cpu_mode_is64bit()); setif(bits, kSlow, tscFreq <= SLOW_TSC_THRESHOLD); setif(bits, kHasAES, cpuid_features() & CPUID_FEATURE_AES); setif(bits, kHasF16C, cpuid_features() & CPUID_FEATURE_F16C); setif(bits, kHasRDRAND, cpuid_features() & CPUID_FEATURE_RDRAND); setif(bits, kHasFMA, cpuid_features() & CPUID_FEATURE_FMA); setif(bits, kHasBMI1, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_BMI1); setif(bits, kHasBMI2, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_BMI2); /* Do not advertise RTM and HLE if the TSX FORCE ABORT WA is required */ if (cpuid_wa_required(CPU_INTEL_TSXFA) & CWA_OFF) { setif(bits, kHasRTM, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_RTM); setif(bits, kHasHLE, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_HLE); } setif(bits, kHasAVX2_0, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX2); setif(bits, kHasRDSEED, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_RDSEED); setif(bits, kHasADX, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_ADX); #if 0 /* The kernel doesn't support MPX or SGX */ setif(bits, kHasMPX, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_MPX); setif(bits, kHasSGX, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_SGX); #endif if (ml_fpu_avx512_enabled()) { setif(bits, kHasAVX512F, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512F); setif(bits, kHasAVX512CD, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512CD); setif(bits, kHasAVX512DQ, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512DQ); setif(bits, kHasAVX512BW, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512BW); setif(bits, kHasAVX512VL, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512VL); setif(bits, kHasAVX512IFMA, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512IFMA); setif(bits, kHasAVX512VBMI, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512VBMI); setif(bits, kHasVAES, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_VAES); setif(bits, kHasVPCLMULQDQ, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_VPCLMULQDQ); setif(bits, kHasAVX512VNNI, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512VNNI); setif(bits, kHasAVX512BITALG, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512BITALG); setif(bits, kHasAVX512VPOPCNTDQ, cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_AVX512VPCDQ); } uint64_t misc_enable = rdmsr64(MSR_IA32_MISC_ENABLE); setif(bits, kHasENFSTRG, (misc_enable & 1ULL) && (cpuid_leaf7_features() & CPUID_LEAF7_FEATURE_ERMS)); _cpu_capabilities = bits; // set kernel version for use by drivers etc } /* initialize the approx_time_supported flag and set the approx time to 0. * Called during initial commpage population. */ static void commpage_mach_approximate_time_init(void) { char *cp = commPagePtr32; uint8_t supported; #ifdef CONFIG_MACH_APPROXIMATE_TIME supported = 1; #else supported = 0; #endif if (cp) { cp += (_COMM_PAGE_APPROX_TIME_SUPPORTED - _COMM_PAGE32_BASE_ADDRESS); *(boolean_t *)cp = supported; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_APPROX_TIME_SUPPORTED - _COMM_PAGE32_START_ADDRESS); *(boolean_t *)cp = supported; } commpage_update_mach_approximate_time(0); } static void commpage_mach_continuous_time_init(void) { commpage_update_mach_continuous_time(0); } static void commpage_boottime_init(void) { clock_sec_t secs; clock_usec_t microsecs; clock_get_boottime_microtime(&secs, µsecs); commpage_update_boottime(secs * USEC_PER_SEC + microsecs); } uint64_t _get_cpu_capabilities(void) { return _cpu_capabilities; } /* Copy data into commpage. */ static void commpage_stuff( commpage_address_t address, const void *source, int length ) { void *dest = commpage_addr_of(address); if (address < next) { panic("commpage overlap at address 0x%p, 0x%x < 0x%x", dest, address, next); } bcopy(source, dest, length); next = address + length; } /* * Updates both the 32-bit and 64-bit commpages with the new data. */ static void commpage_update(commpage_address_t address, const void *source, int length) { void *dest = commpage_specific_addr_of(commPagePtr32, address); bcopy(source, dest, length); dest = commpage_specific_addr_of(commPagePtr64, address); bcopy(source, dest, length); } void commpage_post_ucode_update(void) { commpage_init_cpu_capabilities(); commpage_update(_COMM_PAGE_CPU_CAPABILITIES64, &_cpu_capabilities, sizeof(_cpu_capabilities)); commpage_update(_COMM_PAGE_CPU_CAPABILITIES, &_cpu_capabilities, sizeof(uint32_t)); } /* Copy a routine into comm page if it matches running machine. */ static void commpage_stuff_routine( commpage_descriptor *rd ) { commpage_stuff(rd->commpage_address, rd->code_address, rd->code_length); } /* Fill in the 32- or 64-bit commpage. Called once for each. */ static void commpage_populate_one( vm_map_t submap, // commpage32_map or compage64_map char ** kernAddressPtr, // &commPagePtr32 or &commPagePtr64 size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED commpage_address_t base_offset, // will become commPageBaseOffset commpage_time_data** time_data, // &time_data32 or &time_data64 new_commpage_timeofday_data_t** gtod_time_data, // >od_time_data32 or >od_time_data64 const char* signature, // "commpage 32-bit" or "commpage 64-bit" vm_prot_t uperm) { uint8_t c1; uint16_t c2; uint64_t c8; uint8_t c256[256] = {0}; uint32_t cfamily; short version = _COMM_PAGE_THIS_VERSION; next = 0; commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used, uperm ); *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64 commPageBaseOffset = base_offset; *time_data = commpage_addr_of( _COMM_PAGE_TIME_DATA_START ); *gtod_time_data = commpage_addr_of( _COMM_PAGE_NEWTIMEOFDAY_DATA ); /* Stuff in the constants. We move things into the comm page in strictly * ascending order, so we can check for overlap and panic if so. * Note: the 32-bit cpu_capabilities vector is retained in addition to * the expanded 64-bit vector. */ commpage_stuff(_COMM_PAGE_SIGNATURE, signature, (int)MIN(_COMM_PAGE_SIGNATURELEN, strlen(signature))); commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES64, &_cpu_capabilities, sizeof(_cpu_capabilities)); commpage_stuff(_COMM_PAGE_VERSION, &version, sizeof(short)); commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES, &_cpu_capabilities, sizeof(uint32_t)); c2 = 32; // default if (_cpu_capabilities & kCache64) { c2 = 64; } else if (_cpu_capabilities & kCache128) { c2 = 128; } commpage_stuff(_COMM_PAGE_CACHE_LINESIZE, &c2, 2); /* machine_info valid after ml_wait_max_cpus() */ c1 = machine_info.physical_cpu_max; commpage_stuff(_COMM_PAGE_PHYSICAL_CPUS, &c1, 1); c1 = machine_info.logical_cpu_max; commpage_stuff(_COMM_PAGE_LOGICAL_CPUS, &c1, 1); c1 = ml_get_cluster_count(); commpage_stuff(_COMM_PAGE_CPU_CLUSTERS, &c1, 1); c8 = ml_cpu_cache_size(0); commpage_stuff(_COMM_PAGE_MEMORY_SIZE, &c8, 8); cfamily = cpuid_info()->cpuid_cpufamily; commpage_stuff(_COMM_PAGE_CPUFAMILY, &cfamily, 4); c1 = PAGE_SHIFT; commpage_stuff(_COMM_PAGE_KERNEL_PAGE_SHIFT, &c1, 1); commpage_stuff(_COMM_PAGE_USER_PAGE_SHIFT_64, &c1, 1); ml_map_cpus_to_clusters(c256); commpage_stuff(_COMM_PAGE_CPU_TO_CLUSTER, c256, 256); if (next > _COMM_PAGE_END) { panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%p", next, commPagePtr); } } /* Fill in commpages: called once, during kernel initialization, from the * startup thread before user-mode code is running. * * See the top of this file for a list of what you have to do to add * a new routine to the commpage. */ void commpage_populate( void ) { commpage_init_cpu_capabilities(); commpage_populate_one( commpage32_map, &commPagePtr32, _COMM_PAGE32_AREA_USED, _COMM_PAGE32_BASE_ADDRESS, &time_data32, >od_time_data32, _COMM_PAGE32_SIGNATURE_STRING, VM_PROT_READ); #ifndef __LP64__ pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS, _COMM_PAGE32_AREA_USED / INTEL_PGBYTES); #endif time_data64 = time_data32; /* if no 64-bit commpage, point to 32-bit */ gtod_time_data64 = gtod_time_data32; if (_cpu_capabilities & k64Bit) { commpage_populate_one( commpage64_map, &commPagePtr64, _COMM_PAGE64_AREA_USED, _COMM_PAGE32_START_ADDRESS, /* commpage address are relative to 32-bit commpage placement */ &time_data64, >od_time_data64, _COMM_PAGE64_SIGNATURE_STRING, VM_PROT_READ); #ifndef __LP64__ pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS, _COMM_PAGE64_AREA_USED / INTEL_PGBYTES); #endif } simple_lock_init(&commpage_active_cpus_lock, 0); commpage_update_active_cpus(); commpage_mach_approximate_time_init(); commpage_mach_continuous_time_init(); commpage_boottime_init(); rtc_nanotime_init_commpage(); commpage_update_kdebug_state(); #if CONFIG_ATM commpage_update_atm_diagnostic_config(atm_get_diagnostic_config()); #endif } /* Fill in the common routines during kernel initialization. * This is called before user-mode code is running. */ void commpage_text_populate( void ) { commpage_descriptor **rd; next = 0; commPagePtr = (char *) commpage_allocate(commpage_text32_map, (vm_size_t) _COMM_PAGE_TEXT_AREA_USED, VM_PROT_READ | VM_PROT_EXECUTE); commPageTextPtr32 = commPagePtr; char *cptr = commPagePtr; int i = 0; for (; i < _COMM_PAGE_TEXT_AREA_USED; i++) { cptr[i] = 0xCC; } commPageBaseOffset = _COMM_PAGE_TEXT_START; for (rd = commpage_32_routines; *rd != NULL; rd++) { commpage_stuff_routine(*rd); } #ifndef __LP64__ pmap_commpage32_init((vm_offset_t) commPageTextPtr32, _COMM_PAGE_TEXT_START, _COMM_PAGE_TEXT_AREA_USED / INTEL_PGBYTES); #endif if (_cpu_capabilities & k64Bit) { next = 0; commPagePtr = (char *) commpage_allocate(commpage_text64_map, (vm_size_t) _COMM_PAGE_TEXT_AREA_USED, VM_PROT_READ | VM_PROT_EXECUTE); commPageTextPtr64 = commPagePtr; cptr = commPagePtr; for (i = 0; i < _COMM_PAGE_TEXT_AREA_USED; i++) { cptr[i] = 0xCC; } for (rd = commpage_64_routines; *rd != NULL; rd++) { commpage_stuff_routine(*rd); } #ifndef __LP64__ pmap_commpage64_init((vm_offset_t) commPageTextPtr64, _COMM_PAGE_TEXT_START, _COMM_PAGE_TEXT_AREA_USED / INTEL_PGBYTES); #endif } if (next > _COMM_PAGE_TEXT_END) { panic("commpage text overflow: next=0x%08x, commPagePtr=%p", next, commPagePtr); } } /* Update commpage nanotime information. * * This routine must be serialized by some external means, ie a lock. */ void commpage_set_nanotime( uint64_t tsc_base, uint64_t ns_base, uint32_t scale, uint32_t shift ) { commpage_time_data *p32 = time_data32; commpage_time_data *p64 = time_data64; static uint32_t generation = 0; uint32_t next_gen; if (p32 == NULL) { /* have commpages been allocated yet? */ return; } if (generation != p32->nt_generation) { panic("nanotime trouble 1"); /* possibly not serialized */ } if (ns_base < p32->nt_ns_base) { panic("nanotime trouble 2"); } if ((shift != 0) && ((_cpu_capabilities & kSlow) == 0)) { panic("nanotime trouble 3"); } next_gen = ++generation; if (next_gen == 0) { next_gen = ++generation; } p32->nt_generation = 0; /* mark invalid, so commpage won't try to use it */ p64->nt_generation = 0; p32->nt_tsc_base = tsc_base; p64->nt_tsc_base = tsc_base; p32->nt_ns_base = ns_base; p64->nt_ns_base = ns_base; p32->nt_scale = scale; p64->nt_scale = scale; p32->nt_shift = shift; p64->nt_shift = shift; p32->nt_generation = next_gen; /* mark data as valid */ p64->nt_generation = next_gen; } /* Update commpage gettimeofday() information. As with nanotime(), we interleave * updates to the 32- and 64-bit commpage, in order to keep time more nearly in sync * between the two environments. * * This routine must be serializeed by some external means, ie a lock. */ void commpage_set_timestamp( uint64_t abstime, uint64_t sec, uint64_t frac, uint64_t scale, uint64_t tick_per_sec) { new_commpage_timeofday_data_t *p32 = gtod_time_data32; new_commpage_timeofday_data_t *p64 = gtod_time_data64; p32->TimeStamp_tick = 0x0ULL; p64->TimeStamp_tick = 0x0ULL; p32->TimeStamp_sec = sec; p64->TimeStamp_sec = sec; p32->TimeStamp_frac = frac; p64->TimeStamp_frac = frac; p32->Ticks_scale = scale; p64->Ticks_scale = scale; p32->Ticks_per_sec = tick_per_sec; p64->Ticks_per_sec = tick_per_sec; p32->TimeStamp_tick = abstime; p64->TimeStamp_tick = abstime; } /* Update _COMM_PAGE_MEMORY_PRESSURE. Called periodically from vm's compute_memory_pressure() */ void commpage_set_memory_pressure( unsigned int pressure ) { char *cp; uint32_t *ip; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_BASE_ADDRESS); ip = (uint32_t*) (void *) cp; *ip = (uint32_t) pressure; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_START_ADDRESS); ip = (uint32_t*) (void *) cp; *ip = (uint32_t) pressure; } } /* Updated every time a logical CPU goes offline/online */ void commpage_update_active_cpus(void) { char *cp; volatile uint8_t *ip; /* At least 32-bit commpage must be initialized */ if (!commPagePtr32) { return; } simple_lock(&commpage_active_cpus_lock, LCK_GRP_NULL); cp = commPagePtr32; cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_BASE_ADDRESS); ip = (volatile uint8_t*) cp; *ip = (uint8_t) processor_avail_count_user; cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_START_ADDRESS); ip = (volatile uint8_t*) cp; *ip = (uint8_t) processor_avail_count_user; } simple_unlock(&commpage_active_cpus_lock); } /* * Update the commpage with current kdebug state. This currently has bits for * global trace state, and typefilter enablement. It is likely additional state * will be tracked in the future. * * INVARIANT: This value will always be 0 if global tracing is disabled. This * allows simple guard tests of "if (*_COMM_PAGE_KDEBUG_ENABLE) { ... }" */ void commpage_update_kdebug_state(void) { volatile uint32_t *saved_data_ptr; char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_KDEBUG_ENABLE - _COMM_PAGE32_BASE_ADDRESS); saved_data_ptr = (volatile uint32_t *)cp; *saved_data_ptr = kdebug_commpage_state(); } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_KDEBUG_ENABLE - _COMM_PAGE32_START_ADDRESS); saved_data_ptr = (volatile uint32_t *)cp; *saved_data_ptr = kdebug_commpage_state(); } } /* Ditto for atm_diagnostic_config */ void commpage_update_atm_diagnostic_config(uint32_t diagnostic_config) { volatile uint32_t *saved_data_ptr; char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_ATM_DIAGNOSTIC_CONFIG - _COMM_PAGE32_BASE_ADDRESS); saved_data_ptr = (volatile uint32_t *)cp; *saved_data_ptr = diagnostic_config; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_ATM_DIAGNOSTIC_CONFIG - _COMM_PAGE32_START_ADDRESS); saved_data_ptr = (volatile uint32_t *)cp; *saved_data_ptr = diagnostic_config; } } /* * update the commpage with if dtrace user land probes are enabled */ void commpage_update_dof(boolean_t enabled) { #if CONFIG_DTRACE char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_DTRACE_DOF_ENABLED - _COMM_PAGE32_BASE_ADDRESS); *cp = (enabled ? 1 : 0); } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_DTRACE_DOF_ENABLED - _COMM_PAGE32_START_ADDRESS); *cp = (enabled ? 1 : 0); } #else (void)enabled; #endif } /* * update the dyld global config flags */ void commpage_update_dyld_flags(uint64_t value) { char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_DYLD_FLAGS - _COMM_PAGE32_BASE_ADDRESS); *(uint64_t *)cp = value; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_DYLD_FLAGS - _COMM_PAGE32_BASE_ADDRESS); *(uint64_t *)cp = value; } } /* * update the commpage data for last known value of mach_absolute_time() */ void commpage_update_mach_approximate_time(uint64_t abstime) { #ifdef CONFIG_MACH_APPROXIMATE_TIME uint64_t saved_data; char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_APPROX_TIME - _COMM_PAGE32_BASE_ADDRESS); saved_data = atomic_load_explicit((_Atomic uint64_t *)(uintptr_t)cp, memory_order_relaxed); if (saved_data < abstime) { /* ignoring the success/fail return value assuming that * if the value has been updated since we last read it, * "someone" has a newer timestamp than us and ours is * now invalid. */ atomic_compare_exchange_strong_explicit((_Atomic uint64_t *)(uintptr_t)cp, &saved_data, abstime, memory_order_relaxed, memory_order_relaxed); } } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_APPROX_TIME - _COMM_PAGE32_START_ADDRESS); saved_data = atomic_load_explicit((_Atomic uint64_t *)(uintptr_t)cp, memory_order_relaxed); if (saved_data < abstime) { /* ignoring the success/fail return value assuming that * if the value has been updated since we last read it, * "someone" has a newer timestamp than us and ours is * now invalid. */ atomic_compare_exchange_strong_explicit((_Atomic uint64_t *)(uintptr_t)cp, &saved_data, abstime, memory_order_relaxed, memory_order_relaxed); } } #else #pragma unused (abstime) #endif } void commpage_update_mach_continuous_time(uint64_t sleeptime) { char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_CONT_TIMEBASE - _COMM_PAGE32_START_ADDRESS); *(uint64_t *)cp = sleeptime; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_CONT_TIMEBASE - _COMM_PAGE32_START_ADDRESS); *(uint64_t *)cp = sleeptime; } } void commpage_update_boottime(uint64_t boottime) { char *cp; cp = commPagePtr32; if (cp) { cp += (_COMM_PAGE_BOOTTIME_USEC - _COMM_PAGE32_START_ADDRESS); *(uint64_t *)cp = boottime; } cp = commPagePtr64; if (cp) { cp += (_COMM_PAGE_BOOTTIME_USEC - _COMM_PAGE32_START_ADDRESS); *(uint64_t *)cp = boottime; } } extern user32_addr_t commpage_text32_location; extern user64_addr_t commpage_text64_location; /* Check to see if a given address is in the Preemption Free Zone (PFZ) */ uint32_t commpage_is_in_pfz32(uint32_t addr32) { if ((addr32 >= (commpage_text32_location + _COMM_TEXT_PFZ_START_OFFSET)) && (addr32 < (commpage_text32_location + _COMM_TEXT_PFZ_END_OFFSET))) { return 1; } else { return 0; } } uint32_t commpage_is_in_pfz64(addr64_t addr64) { if ((addr64 >= (commpage_text64_location + _COMM_TEXT_PFZ_START_OFFSET)) && (addr64 < (commpage_text64_location + _COMM_TEXT_PFZ_END_OFFSET))) { return 1; } else { return 0; } }