X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/4452a7af2eac33dbad800bcc91f2399d62c18f53..593a1d5fd87cdf5b46dd5fcb84467b432cea0f91:/osfmk/i386/commpage/commpage.c diff --git a/osfmk/i386/commpage/commpage.c b/osfmk/i386/commpage/commpage.c index 328e095ab..b2bd5af50 100644 --- a/osfmk/i386/commpage/commpage.c +++ b/osfmk/i386/commpage/commpage.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2003-2007 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -50,6 +50,8 @@ #include #include #include +#include +#include #include #include #include @@ -67,8 +69,8 @@ extern commpage_descriptor* commpage_64_routines[]; extern commpage_descriptor sigdata_descriptor; extern commpage_descriptor *ba_descriptors[]; -extern vm_map_t com_region_map32; // the shared submap, set up in vm init -extern vm_map_t com_region_map64; // the shared submap, set up in vm init +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 char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage char *commPagePtr64 = NULL; // ...and of 64-bit commpage @@ -76,9 +78,6 @@ int _cpu_capabilities = 0; // define the capability vector int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */ -void* dsmos_blobs[3]; /* ptrs to the system integrity data in each commpage */ -int dsmos_blob_count = 0; - static uintptr_t next; // next available byte in comm page static int cur_routine; // comm page address of "current" routine static int matched; // true if we've found a match for "current" routine @@ -86,6 +85,9 @@ static int matched; // true if we've found a match for "current" routine static char *commPagePtr; // virtual addr in kernel map of commpage we are working on static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset in commpage +static commpage_time_data *time_data32 = NULL; +static commpage_time_data *time_data64 = NULL; + /* 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 @@ -95,10 +97,10 @@ static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset static void* commpage_allocate( - vm_map_t submap, // com_region_map32 or com_region_map64 + vm_map_t submap, // commpage32_map or commpage_map64 size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED { - vm_offset_t kernel_addr; // address of commpage in kernel map + vm_offset_t kernel_addr = 0; // address of commpage in kernel map vm_offset_t zero = 0; vm_size_t size = area_used; // size actually populated vm_map_entry_t entry; @@ -107,7 +109,7 @@ commpage_allocate( if (submap == NULL) panic("commpage submap is null"); - if (vm_allocate(kernel_map,&kernel_addr,area_used,VM_FLAGS_ANYWHERE)) + if (vm_map(kernel_map,&kernel_addr,area_used,0,VM_FLAGS_ANYWHERE,NULL,0,FALSE,VM_PROT_ALL,VM_PROT_ALL,VM_INHERIT_NONE)) panic("cannot allocate commpage"); if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE)) @@ -128,7 +130,7 @@ commpage_allocate( if (mach_make_memory_entry( kernel_map, // target map &size, // size kernel_addr, // offset (address in kernel map) - VM_PROT_DEFAULT, // map it RW + VM_PROT_ALL, // map it RWX &handle, // this is the object handle we get NULL )) // parent_entry (what is this?) panic("cannot make entry for commpage"); @@ -141,8 +143,8 @@ commpage_allocate( handle, // port is the memory entry we just made 0, // offset (map 1st page in memory entry) FALSE, // copy - VM_PROT_READ, // cur_protection (R-only in user map) - VM_PROT_READ, // max_protection + VM_PROT_READ|VM_PROT_EXECUTE, // cur_protection (R-only in user map) + VM_PROT_READ|VM_PROT_EXECUTE, // max_protection VM_INHERIT_SHARE )) // inheritance panic("cannot map commpage"); @@ -191,6 +193,12 @@ commpage_init_cpu_capabilities( void ) ml_cpu_get_info(&cpu_info); switch (cpu_info.vector_unit) { + case 8: + bits |= kHasSSE4_2; + /* fall thru */ + case 7: + bits |= kHasSSE4_1; + /* fall thru */ case 6: bits |= kHasSupplementalSSE3; /* fall thru */ @@ -233,11 +241,14 @@ commpage_init_cpu_capabilities( void ) if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable bits |= k64Bit; + if (tscFreq <= SLOW_TSC_THRESHOLD) /* is TSC too slow for _commpage_nanotime? */ + bits |= kSlow; + _cpu_capabilities = bits; // set kernel version for use by drivers etc } int -_get_cpu_capabilities() +_get_cpu_capabilities(void) { return _cpu_capabilities; } @@ -253,7 +264,7 @@ commpage_stuff( void *dest = commpage_addr_of(address); if ((uintptr_t)dest < next) - panic("commpage overlap at address 0x%x, 0x%x < 0x%x", address, dest, next); + panic("commpage overlap at address 0x%x, %p < 0x%lx", address, dest, next); bcopy(source,dest,length); @@ -305,7 +316,7 @@ commpage_stuff_routine( if (rd->commpage_address != cur_routine) { if ((cur_routine!=0) && (matched==0)) - panic("commpage no match for last, next address %08x", rd->commpage_address); + panic("commpage no match for last, next address %08lx", rd->commpage_address); cur_routine = rd->commpage_address; matched = 0; } @@ -315,7 +326,7 @@ commpage_stuff_routine( if ((must == rd->musthave) && (cant == 0)) { if (matched) - panic("commpage multiple matches for address %08x", rd->commpage_address); + panic("commpage multiple matches for address %08lx", rd->commpage_address); matched = 1; commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length); @@ -329,12 +340,13 @@ commpage_stuff_routine( static void commpage_populate_one( - vm_map_t submap, // com_region_map32 or com_region_map64 + 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 size_t base_offset, // will become commPageBaseOffset commpage_descriptor** commpage_routines, // list of routine ptrs for this commpage boolean_t legacy, // true if 32-bit commpage + commpage_time_data** time_data, // &time_data32 or &time_data64 const char* signature ) // "commpage 32-bit" or "commpage 64-bit" { short c2; @@ -349,6 +361,8 @@ commpage_populate_one( commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used ); *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64 commPageBaseOffset = base_offset; + + *time_data = commpage_addr_of( _COMM_PAGE_TIME_DATA_START ); /* 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. @@ -390,7 +404,7 @@ commpage_populate_one( panic("commpage no match on last routine"); if (next > (uintptr_t)_COMM_PAGE_END) - panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr); + panic("commpage overflow: next = 0x%08lx, commPagePtr = 0x%08lx", next, (uintptr_t)commPagePtr); if ( legacy ) { next = (uintptr_t) NULL; @@ -400,10 +414,6 @@ commpage_populate_one( next = (uintptr_t) NULL; commpage_stuff_routine(&sigdata_descriptor); } - - /* salt away a ptr to the system integrity data in this commpage */ - dsmos_blobs[dsmos_blob_count++] = - commpage_addr_of( _COMM_PAGE_SYSTEM_INTEGRITY ); } @@ -419,23 +429,27 @@ commpage_populate( void ) { commpage_init_cpu_capabilities(); - commpage_populate_one( com_region_map32, + commpage_populate_one( commpage32_map, &commPagePtr32, _COMM_PAGE32_AREA_USED, _COMM_PAGE32_BASE_ADDRESS, commpage_32_routines, TRUE, /* legacy (32-bit) commpage */ + &time_data32, "commpage 32-bit"); pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS, _COMM_PAGE32_AREA_USED/INTEL_PGBYTES); + + time_data64 = time_data32; /* if no 64-bit commpage, point to 32-bit */ if (_cpu_capabilities & k64Bit) { - commpage_populate_one( com_region_map64, + commpage_populate_one( commpage64_map, &commPagePtr64, _COMM_PAGE64_AREA_USED, _COMM_PAGE32_START_ADDRESS, /* because kernel is built 32-bit */ commpage_64_routines, FALSE, /* not a legacy commpage */ + &time_data64, "commpage 64-bit"); pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS, _COMM_PAGE64_AREA_USED/INTEL_PGBYTES); @@ -443,3 +457,101 @@ commpage_populate( void ) rtc_nanotime_init_commpage(); } + + +/* Update commpage nanotime information. Note that we interleave + * setting the 32- and 64-bit commpages, in order to keep nanotime more + * nearly in sync between the two environments. + * + * 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 != 32) && ((_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; +} + + +/* Disable commpage gettimeofday(), forcing commpage to call through to the kernel. */ + +void +commpage_disable_timestamp( void ) +{ + time_data32->gtod_generation = 0; + time_data64->gtod_generation = 0; +} + + +/* 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 secs ) +{ + commpage_time_data *p32 = time_data32; + commpage_time_data *p64 = time_data64; + static uint32_t generation = 0; + uint32_t next_gen; + + next_gen = ++generation; + if (next_gen == 0) + next_gen = ++generation; + + p32->gtod_generation = 0; /* mark invalid, so commpage won't try to use it */ + p64->gtod_generation = 0; + + p32->gtod_ns_base = abstime; + p64->gtod_ns_base = abstime; + + p32->gtod_sec_base = secs; + p64->gtod_sec_base = secs; + + p32->gtod_generation = next_gen; /* mark data as valid */ + p64->gtod_generation = next_gen; +}