X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/89b3af67bb32e691275bf6fa803d1834b2284115..cb3231590a3c94ab4375e2228bd5e86b0cf1ad7e:/osfmk/i386/commpage/commpage.c
diff --git a/osfmk/i386/commpage/commpage.c b/osfmk/i386/commpage/commpage.c
index 328e095ab..2c4a40d83 100644
--- a/osfmk/i386/commpage/commpage.c
+++ b/osfmk/i386/commpage/commpage.c
@@ -1,8 +1,8 @@
/*
- * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2019 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
@@ -11,10 +11,10 @@
* 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,
@@ -22,7 +22,7 @@
* 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@
*/
@@ -48,72 +48,116 @@
#include <mach/mach_types.h>
#include <mach/machine.h>
#include <mach/vm_map.h>
+#include <mach/mach_vm.h>
+#include <mach/machine.h>
+#include <i386/cpuid.h>
+#include <i386/tsc.h>
+#include <i386/rtclock_protos.h>
+#include <i386/cpu_data.h>
#include <i386/machine_routines.h>
#include <i386/misc_protos.h>
+#include <i386/cpuid.h>
#include <machine/cpu_capabilities.h>
#include <machine/commpage.h>
#include <machine/pmap.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
+#include <stdatomic.h>
+
#include <ipc/ipc_port.h>
#include <kern/page_decrypt.h>
+#include <kern/processor.h>
+
+#include <sys/kdebug.h>
+
+#if CONFIG_ATM
+#include <atm/atm_internal.h>
+#endif
/* the lists of commpage routines are in commpage_asm.s */
-extern commpage_descriptor* commpage_32_routines[];
-extern commpage_descriptor* commpage_64_routines[];
+extern commpage_descriptor* commpage_32_routines[];
+extern commpage_descriptor* commpage_64_routines[];
-/* translated commpage descriptors from commpage_sigs.c */
-extern commpage_descriptor sigdata_descriptor;
-extern commpage_descriptor *ba_descriptors[];
+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
-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
-char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage
-char *commPagePtr64 = NULL; // ...and of 64-bit commpage
-int _cpu_capabilities = 0; // define the capability vector
+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
-int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */
+uint64_t _cpu_capabilities = 0; // define the capability vector
-void* dsmos_blobs[3]; /* ptrs to the system integrity data in each commpage */
-int dsmos_blob_count = 0;
+typedef uint32_t commpage_address_t;
-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
+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 size_t commPageBaseOffset; // add to 32-bit runtime address to get offset in commpage
+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)
+ * 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, // com_region_map32 or com_region_map64
- size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED
+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)
{
- vm_offset_t kernel_addr; // 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;
- ipc_port_t handle;
+ 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;
+ ipc_port_t handle;
+ kern_return_t kr;
+ vm_map_kernel_flags_t vmk_flags;
- if (submap == NULL)
+ if (submap == NULL) {
panic("commpage submap is null");
+ }
- if (vm_allocate(kernel_map,&kernel_addr,area_used,VM_FLAGS_ANYWHERE))
- panic("cannot allocate commpage");
+ kr = vm_map_kernel(kernel_map,
+ &kernel_addr,
+ area_used,
+ 0,
+ VM_FLAGS_ANYWHERE,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ 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 (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE))
- panic("cannot wire commpage");
+ 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
@@ -121,43 +165,80 @@ commpage_allocate(
*
* JMM - What we really need is a way to create it like this in the first place.
*/
- if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map)
- panic("cannot find commpage entry");
- entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
-
- if (mach_make_memory_entry( kernel_map, // target map
- &size, // size
- kernel_addr, // offset (address in kernel map)
- VM_PROT_DEFAULT, // map it RW
- &handle, // this is the object handle we get
- NULL )) // parent_entry (what is this?)
- panic("cannot make entry for commpage");
-
- if (vm_map_64( submap, // target map (shared submap)
- &zero, // address (map into 1st page in submap)
- area_used, // size
- 0, // mask
- VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
- 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_INHERIT_SHARE )) // inheritance
- panic("cannot map commpage");
+ 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_NONE;
+ 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 = vm_map_64_kernel(
+ submap, // target map (shared submap)
+ &zero, // address (map into 1st page in submap)
+ area_used, // size
+ 0, // mask
+ VM_FLAGS_FIXED, // flags (it must be 1st page in submap)
+ vmk_flags,
+ VM_KERN_MEMORY_NONE,
+ 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*) kernel_addr; // return address in kernel map
+ 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(
- int addr_at_runtime )
+ 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)
{
- return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - commPageBaseOffset);
+ /*
+ * 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
@@ -170,10 +251,12 @@ commpage_cpus( void )
cpus = ml_get_max_cpus(); // NB: this call can block
- if (cpus == 0)
+ if (cpus == 0) {
panic("commpage cpus==0");
- if (cpus > 0xFF)
+ }
+ if (cpus > 0xFF) {
cpus = 0xFF;
+ }
return cpus;
}
@@ -183,61 +266,179 @@ commpage_cpus( void )
static void
commpage_init_cpu_capabilities( void )
{
- int bits;
+ 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 6:
- bits |= kHasSupplementalSSE3;
- /* fall thru */
- case 5:
- bits |= kHasSSE3;
- /* fall thru */
- case 4:
- bits |= kHasSSE2;
- /* fall thru */
- case 3:
- bits |= kHasSSE;
- /* fall thru */
- case 2:
- bits |= kHasMMX;
- default:
- break;
+ case 9:
+ bits |= kHasAVX1_0;
+ /* fall thru */
+ case 8:
+ bits |= kHasSSE4_2;
+ /* fall thru */
+ case 7:
+ bits |= kHasSSE4_1;
+ /* fall thru */
+ case 6:
+ bits |= kHasSupplementalSSE3;
+ /* fall thru */
+ case 5:
+ bits |= kHasSSE3;
+ /* fall thru */
+ case 4:
+ bits |= kHasSSE2;
+ /* fall thru */
+ case 3:
+ bits |= kHasSSE;
+ /* fall thru */
+ case 2:
+ bits |= kHasMMX;
+ 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
-
- if (cpus == 1)
- bits |= kUP;
+ 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
+ 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);
+}
- if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable
- bits |= k64Bit;
+static void
+commpage_mach_continuous_time_init(void)
+{
+ commpage_update_mach_continuous_time(0);
+}
- _cpu_capabilities = bits; // set kernel version for use by drivers etc
+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);
}
-int
-_get_cpu_capabilities()
+uint64_t
+_get_cpu_capabilities(void)
{
return _cpu_capabilities;
}
@@ -246,164 +447,117 @@ _get_cpu_capabilities()
static void
commpage_stuff(
- int address,
- const void *source,
- int length )
-{
- 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);
-
- bcopy(source,dest,length);
-
- next = ((uintptr_t)dest + length);
+ 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_stuff_swap(
- int address,
- void *source,
- int length,
- int legacy )
+commpage_update(commpage_address_t address, const void *source, int length)
{
- if ( legacy ) {
- void *dest = commpage_addr_of(address);
- dest = (void *)((uintptr_t) dest + _COMM_PAGE_SIGS_OFFSET);
- switch (length) {
- case 2:
- OSWriteSwapInt16(dest, 0, *(uint16_t *)source);
- break;
- case 4:
- OSWriteSwapInt32(dest, 0, *(uint32_t *)source);
- break;
- case 8:
- OSWriteSwapInt64(dest, 0, *(uint64_t *)source);
- break;
- }
- }
+ void *dest = commpage_specific_addr_of(commPagePtr32, address);
+ bcopy(source, dest, length);
+
+ dest = commpage_specific_addr_of(commPagePtr64, address);
+ bcopy(source, dest, length);
}
-static void
-commpage_stuff2(
- int address,
- void *source,
- int length,
- int legacy )
+void
+commpage_post_ucode_update(void)
{
- commpage_stuff_swap(address, source, length, legacy);
- commpage_stuff(address, source, length);
+ 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_descriptor *rd )
{
- int must,cant;
-
- if (rd->commpage_address != cur_routine) {
- if ((cur_routine!=0) && (matched==0))
- panic("commpage no match for last, next address %08x", rd->commpage_address);
- cur_routine = rd->commpage_address;
- matched = 0;
- }
-
- must = _cpu_capabilities & rd->musthave;
- cant = _cpu_capabilities & rd->canthave;
-
- if ((must == rd->musthave) && (cant == 0)) {
- if (matched)
- panic("commpage multiple matches for address %08x", rd->commpage_address);
- matched = 1;
-
- commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length);
- }
+ commpage_stuff(rd->commpage_address, rd->code_address, rd->code_length);
}
+
/* Fill in the 32- or 64-bit commpage. Called once for each.
- * The 32-bit ("legacy") commpage has a bunch of stuff added to it
- * for translated processes, some of which is byte-swapped.
*/
static void
-commpage_populate_one(
- vm_map_t submap, // com_region_map32 or com_region_map64
- 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
- const char* signature ) // "commpage 32-bit" or "commpage 64-bit"
+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)
{
- short c2;
- static double two52 = 1048576.0 * 1048576.0 * 4096.0; // 2**52
- static double ten6 = 1000000.0; // 10**6
- commpage_descriptor **rd;
+ uint8_t c1;
+ uint16_t c2;
+ int c4;
+ uint64_t c8;
+ uint32_t cfamily;
short version = _COMM_PAGE_THIS_VERSION;
- int swapcaps;
- next = (uintptr_t) NULL;
- cur_routine = 0;
- commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used );
- *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64
+ 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.
- */
- commpage_stuff(_COMM_PAGE_SIGNATURE,signature,strlen(signature));
- commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short),legacy);
- commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,sizeof(int));
-
- /* excuse our magic constants, we cannot include ppc/cpu_capabilities.h */
- /* always set kCache32 and kDcbaAvailable */
- swapcaps = 0x44;
- if ( _cpu_capabilities & kUP )
- swapcaps |= (kUP + (1 << kNumCPUsShift));
- else
- swapcaps |= 2 << kNumCPUsShift; /* limit #cpus to 2 */
- if ( ! noVMX ) /* if rosetta will be emulating altivec... */
- swapcaps |= 0x101; /* ...then set kHasAltivec and kDataStreamsAvailable too */
- commpage_stuff_swap(_COMM_PAGE_CPU_CAPABILITIES, &swapcaps, sizeof(int), legacy);
- c2 = 32;
- commpage_stuff_swap(_COMM_PAGE_CACHE_LINESIZE,&c2,2,legacy);
-
- if (_cpu_capabilities & kCache32)
- c2 = 32;
- else if (_cpu_capabilities & kCache64)
+ * 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)
+ } else if (_cpu_capabilities & kCache128) {
c2 = 128;
- commpage_stuff(_COMM_PAGE_CACHE_LINESIZE,&c2,2);
-
- if ( legacy ) {
- commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8,legacy);
- commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8,legacy);
}
+ commpage_stuff(_COMM_PAGE_CACHE_LINESIZE, &c2, 2);
- for( rd = commpage_routines; *rd != NULL ; rd++ )
- commpage_stuff_routine(*rd);
-
- if (!matched)
- panic("commpage no match on last routine");
+ c4 = MP_SPIN_TRIES;
+ commpage_stuff(_COMM_PAGE_SPIN_COUNT, &c4, 4);
- if (next > (uintptr_t)_COMM_PAGE_END)
- panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr);
+ /* machine_info valid after ml_get_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);
- if ( legacy ) {
- next = (uintptr_t) NULL;
- for( rd = ba_descriptors; *rd != NULL ; rd++ )
- commpage_stuff_routine(*rd);
+ c8 = ml_cpu_cache_size(0);
+ commpage_stuff(_COMM_PAGE_MEMORY_SIZE, &c8, 8);
- next = (uintptr_t) NULL;
- commpage_stuff_routine(&sigdata_descriptor);
- }
+ cfamily = cpuid_info()->cpuid_cpufamily;
+ commpage_stuff(_COMM_PAGE_CPUFAMILY, &cfamily, 4);
- /* salt away a ptr to the system integrity data in this commpage */
- dsmos_blobs[dsmos_blob_count++] =
- commpage_addr_of( _COMM_PAGE_SYSTEM_INTEGRITY );
+ if (next > _COMM_PAGE_END) {
+ panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%p", next, commPagePtr);
+ }
}
@@ -412,34 +566,482 @@ commpage_populate_one(
*
* 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( com_region_map32,
- &commPagePtr32,
- _COMM_PAGE32_AREA_USED,
- _COMM_PAGE32_BASE_ADDRESS,
- commpage_32_routines,
- TRUE, /* legacy (32-bit) commpage */
- "commpage 32-bit");
- pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS,
- _COMM_PAGE32_AREA_USED/INTEL_PGBYTES);
+
+ 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( com_region_map64,
- &commPagePtr64,
- _COMM_PAGE64_AREA_USED,
- _COMM_PAGE32_START_ADDRESS, /* because kernel is built 32-bit */
- commpage_64_routines,
- FALSE, /* not a legacy commpage */
- "commpage 64-bit");
- pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS,
- _COMM_PAGE64_AREA_USED/INTEL_PGBYTES);
+ 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;
+ }
+}
+
+
+/* Update _COMM_PAGE_SPIN_COUNT. We might want to reduce when running on a battery, etc. */
+
+void
+commpage_set_spin_count(
+ unsigned int count )
+{
+ char *cp;
+ uint32_t *ip;
+
+ if (count == 0) { /* we test for 0 after decrement, not before */
+ count = 1;
+ }
+
+ cp = commPagePtr32;
+ if (cp) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) count;
+ }
+
+ cp = commPagePtr64;
+ if (cp) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_START_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) count;
+ }
+}
+
+/* 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_SYSTEM_FLAGS - _COMM_PAGE32_BASE_ADDRESS);
+ *(uint64_t *)cp = value;
+ }
+
+ cp = commPagePtr64;
+ if (cp) {
+ cp += (_COMM_PAGE_DYLD_SYSTEM_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;
+ }
}