/*
- * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2006-2012 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
* 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,
* 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@
*/
#include <i386/vmx/vmx_asm.h>
#include <i386/vmx/vmx_shims.h>
#include <i386/vmx/vmx_cpu.h>
-#include <i386/mtrr.h>
#include <mach/mach_host.h> /* for host_info() */
#define VMX_KPRINTF(x...) /* kprintf("vmx: " x) */
int vmx_use_count = 0;
boolean_t vmx_exclusive = FALSE;
-decl_simple_lock_data(static,vmx_use_count_lock)
+
+static LCK_GRP_DECLARE(vmx_lck_grp, "vmx");
+static LCK_MTX_DECLARE(vmx_lck_mtx, &vmx_lck_grp);
/* -----------------------------------------------------------------------------
- vmx_is_available()
- Is the VMX facility available on this CPU?
- -------------------------------------------------------------------------- */
+* vmx_is_available()
+* Is the VMX facility available on this CPU?
+* -------------------------------------------------------------------------- */
static inline boolean_t
vmx_is_available(void)
{
- return (0 != (cpuid_features() & CPUID_FEATURE_VMX));
+ return 0 != (cpuid_features() & CPUID_FEATURE_VMX);
}
/* -----------------------------------------------------------------------------
- vmxon_is_enabled()
- Is the VMXON instruction enabled on this CPU?
- -------------------------------------------------------------------------- */
+* vmxon_is_enabled()
+* Is the VMXON instruction enabled on this CPU?
+* -------------------------------------------------------------------------- */
static inline boolean_t
vmxon_is_enabled(void)
{
- return (vmx_is_available() &&
- (rdmsr64(MSR_IA32_FEATURE_CONTROL) & MSR_IA32_FEATCTL_VMXON));
+ return vmx_is_available() &&
+ (rdmsr64(MSR_IA32_FEATURE_CONTROL) & MSR_IA32_FEATCTL_VMXON);
}
+#if MACH_ASSERT
/* -----------------------------------------------------------------------------
- vmx_is_cr0_valid()
- Is CR0 valid for executing VMXON on this CPU?
- -------------------------------------------------------------------------- */
+* vmx_is_cr0_valid()
+* Is CR0 valid for executing VMXON on this CPU?
+* -------------------------------------------------------------------------- */
static inline boolean_t
vmx_is_cr0_valid(vmx_specs_t *specs)
{
uintptr_t cr0 = get_cr0();
- return (0 == ((~cr0 & specs->cr0_fixed_0)|(cr0 & ~specs->cr0_fixed_1)));
+ return 0 == ((~cr0 & specs->cr0_fixed_0) | (cr0 & ~specs->cr0_fixed_1));
}
/* -----------------------------------------------------------------------------
- vmx_is_cr4_valid()
- Is CR4 valid for executing VMXON on this CPU?
- -------------------------------------------------------------------------- */
+* vmx_is_cr4_valid()
+* Is CR4 valid for executing VMXON on this CPU?
+* -------------------------------------------------------------------------- */
static inline boolean_t
vmx_is_cr4_valid(vmx_specs_t *specs)
{
uintptr_t cr4 = get_cr4();
- return (0 == ((~cr4 & specs->cr4_fixed_0)|(cr4 & ~specs->cr4_fixed_1)));
+ return 0 == ((~cr4 & specs->cr4_fixed_0) | (cr4 & ~specs->cr4_fixed_1));
}
+#endif
+
static void
-vmx_init(void)
+vmx_enable(void)
{
uint64_t msr_image;
- if (!vmx_is_available())
+ if (!vmx_is_available()) {
return;
+ }
/*
* We don't count on EFI initializing MSR_IA32_FEATURE_CONTROL
* and turning VMXON on and locking the bit, so we do that now.
*/
msr_image = rdmsr64(MSR_IA32_FEATURE_CONTROL);
- if (0 == ((msr_image & MSR_IA32_FEATCTL_LOCK)))
+ if (0 == ((msr_image & MSR_IA32_FEATCTL_LOCK))) {
wrmsr64(MSR_IA32_FEATURE_CONTROL,
- (msr_image |
- MSR_IA32_FEATCTL_VMXON |
- MSR_IA32_FEATCTL_LOCK));
+ (msr_image |
+ MSR_IA32_FEATCTL_VMXON |
+ MSR_IA32_FEATCTL_LOCK));
+ }
+
+ set_cr4(get_cr4() | CR4_VMXE);
}
/* -----------------------------------------------------------------------------
- vmx_get_specs()
- Obtain VMX facility specifications for this CPU and
- enter them into the vmx_specs_t structure. If VMX is not available or
- disabled on this CPU, set vmx_present to false and return leaving
- the remainder of the vmx_specs_t uninitialized.
- -------------------------------------------------------------------------- */
+* vmx_get_specs()
+* Obtain VMX facility specifications for this CPU and
+* enter them into the vmx_specs_t structure. If VMX is not available or
+* disabled on this CPU, set vmx_present to false and return leaving
+* the remainder of the vmx_specs_t uninitialized.
+* -------------------------------------------------------------------------- */
void
-vmx_get_specs()
+vmx_cpu_init()
{
vmx_specs_t *specs = ¤t_cpu_datap()->cpu_vmx.specs;
- uint64_t msr_image;
-
- /* this is called once for every CPU, but the lock doesn't care :-) */
- simple_lock_init(&vmx_use_count_lock, 0);
- vmx_init();
+ vmx_enable();
- /*
- * if we have read the data on boot, we won't read it
- * again on wakeup, otherwise *bad* things will happen
- */
- if (specs->initialized)
+ VMX_KPRINTF("[%d]vmx_cpu_init() initialized: %d\n",
+ cpu_number(), specs->initialized);
+
+ /* if we have read the data on boot, we won't read it again on wakeup */
+ if (specs->initialized) {
return;
- else
+ } else {
specs->initialized = TRUE;
+ }
/* See if VMX is present, return if it is not */
specs->vmx_present = vmx_is_available() && vmxon_is_enabled();
- if (!specs->vmx_present)
+ VMX_KPRINTF("[%d]vmx_cpu_init() vmx_present: %d\n",
+ cpu_number(), specs->vmx_present);
+ if (!specs->vmx_present) {
return;
+ }
+
+#define rdmsr_mask(msr, mask) (uint32_t)(rdmsr64(msr) & (mask))
+ specs->vmcs_id = rdmsr_mask(MSR_IA32_VMX_BASIC, VMX_VCR_VMCS_REV_ID);
-#define bitfield(x,f) ((x >> f##_BIT) & f##_MASK)
- /* Obtain and decode VMX general capabilities */
- msr_image = rdmsr64(MSR_IA32_VMX_BASIC);
- specs->vmcs_id = (uint32_t)(msr_image & VMX_VCR_VMCS_REV_ID);
- specs->vmcs_mem_type = bitfield(msr_image, VMX_VCR_VMCS_MEM_TYPE) != 0;
- specs->vmcs_size = bitfield(msr_image, VMX_VCR_VMCS_SIZE);
-
- /* Obtain allowed settings for pin-based execution controls */
- msr_image = rdmsr64(MSR_IA32_VMXPINBASED_CTLS);
- specs->pin_exctls_0 = (uint32_t)(msr_image & 0xFFFFFFFF);
- specs->pin_exctls_1 = (uint32_t)(msr_image >> 32);
-
- /* Obtain allowed settings for processor-based execution controls */
- msr_image = rdmsr64(MSR_IA32_PROCBASED_CTLS);
- specs->proc_exctls_0 = (uint32_t)(msr_image & 0xFFFFFFFF);
- specs->proc_exctls_1 = (uint32_t)(msr_image >> 32);
-
- /* Obtain allowed settings for VM-exit controls */
- msr_image = rdmsr64(MSR_IA32_VMX_EXIT_CTLS);
- specs->exit_ctls_0 = (uint32_t)(msr_image & 0xFFFFFFFF);
- specs->exit_ctls_1 = (uint32_t)(msr_image >> 32);
-
- /* Obtain allowed settings for VM-entry controls */
- msr_image = rdmsr64(MSR_IA32_VMX_ENTRY_CTLS);
- specs->enter_ctls_0 = (uint32_t)(msr_image & 0xFFFFFFFF);
- specs->enter_ctls_0 = (uint32_t)(msr_image >> 32);
-
- /* Obtain and decode miscellaneous capabilities */
- msr_image = rdmsr64(MSR_IA32_VMX_MISC);
- specs->act_halt = bitfield(msr_image, VMX_VCR_ACT_HLT) != 0;
- specs->act_shutdown = bitfield(msr_image, VMX_VCR_ACT_SHUTDOWN) != 0;
- specs->act_SIPI = bitfield(msr_image, VMX_VCR_ACT_SIPI) != 0;
- specs->act_CSTATE = bitfield(msr_image, VMX_VCR_ACT_CSTATE) != 0;
- specs->cr3_targs = bitfield(msr_image, VMX_VCR_CR3_TARGS);
- specs->max_msrs = (uint32_t)(512 * (1 + bitfield(msr_image, VMX_VCR_MAX_MSRS)));
- specs->mseg_id = (uint32_t)bitfield(msr_image, VMX_VCR_MSEG_ID);
-
/* Obtain VMX-fixed bits in CR0 */
- specs->cr0_fixed_0 = (uint32_t)rdmsr64(MSR_IA32_VMX_CR0_FIXED0) & 0xFFFFFFFF;
- specs->cr0_fixed_1 = (uint32_t)rdmsr64(MSR_IA32_VMX_CR0_FIXED1) & 0xFFFFFFFF;
-
+ specs->cr0_fixed_0 = rdmsr_mask(MSR_IA32_VMX_CR0_FIXED0, 0xFFFFFFFF);
+ specs->cr0_fixed_1 = rdmsr_mask(MSR_IA32_VMX_CR0_FIXED1, 0xFFFFFFFF);
+
/* Obtain VMX-fixed bits in CR4 */
- specs->cr4_fixed_0 = (uint32_t)rdmsr64(MSR_IA32_VMX_CR4_FIXED0) & 0xFFFFFFFF;
- specs->cr4_fixed_1 = (uint32_t)rdmsr64(MSR_IA32_VMX_CR4_FIXED1) & 0xFFFFFFFF;
+ specs->cr4_fixed_0 = rdmsr_mask(MSR_IA32_VMX_CR4_FIXED0, 0xFFFFFFFF);
+ specs->cr4_fixed_1 = rdmsr_mask(MSR_IA32_VMX_CR4_FIXED1, 0xFFFFFFFF);
}
/* -----------------------------------------------------------------------------
- vmx_on()
- Enter VMX root operation on this CPU.
- -------------------------------------------------------------------------- */
+* vmx_on()
+* Enter VMX root operation on this CPU.
+* -------------------------------------------------------------------------- */
static void
-vmx_on(void)
+vmx_on(void *arg __unused)
{
vmx_cpu_t *cpu = ¤t_cpu_datap()->cpu_vmx;
addr64_t vmxon_region_paddr;
int result;
- vmx_init();
-
+ VMX_KPRINTF("[%d]vmx_on() entry state: %d\n",
+ cpu_number(), cpu->specs.vmx_on);
+
assert(cpu->specs.vmx_present);
- if (NULL == cpu->vmxon_region)
+ if (NULL == cpu->vmxon_region) {
panic("vmx_on: VMXON region not allocated");
+ }
vmxon_region_paddr = vmx_paddr(cpu->vmxon_region);
/*
* Enable VMX operation.
*/
- set_cr4(get_cr4() | CR4_VMXE);
-
- assert(vmx_is_cr0_valid(&cpu->specs));
- assert(vmx_is_cr4_valid(&cpu->specs));
-
- if ((result = __vmxon(&vmxon_region_paddr)) != VMX_SUCCEED) {
- panic("vmx_on: unexpected return %d from __vmxon()", result);
+ if (FALSE == cpu->specs.vmx_on) {
+ assert(vmx_is_cr0_valid(&cpu->specs));
+ assert(vmx_is_cr4_valid(&cpu->specs));
+
+ result = __vmxon(vmxon_region_paddr);
+
+ if (result != VMX_SUCCEED) {
+ panic("vmx_on: unexpected return %d from __vmxon()", result);
+ }
+
+ cpu->specs.vmx_on = TRUE;
}
+ VMX_KPRINTF("[%d]vmx_on() return state: %d\n",
+ cpu_number(), cpu->specs.vmx_on);
}
/* -----------------------------------------------------------------------------
- vmx_off()
- Leave VMX root operation on this CPU.
- -------------------------------------------------------------------------- */
+* vmx_off()
+* Leave VMX root operation on this CPU.
+* -------------------------------------------------------------------------- */
static void
-vmx_off(void)
+vmx_off(void *arg __unused)
{
+ vmx_cpu_t *cpu = ¤t_cpu_datap()->cpu_vmx;
int result;
-
- /* Tell the CPU to release the VMXON region */
- if ((result = __vmxoff()) != VMX_SUCCEED) {
- panic("vmx_off: unexpected return %d from __vmxoff()", result);
+
+ VMX_KPRINTF("[%d]vmx_off() entry state: %d\n",
+ cpu_number(), cpu->specs.vmx_on);
+
+ if (TRUE == cpu->specs.vmx_on) {
+ /* Tell the CPU to release the VMXON region */
+ result = __vmxoff();
+
+ if (result != VMX_SUCCEED) {
+ panic("vmx_off: unexpected return %d from __vmxoff()", result);
+ }
+
+ cpu->specs.vmx_on = FALSE;
}
+
+ VMX_KPRINTF("[%d]vmx_off() return state: %d\n",
+ cpu_number(), cpu->specs.vmx_on);
}
/* -----------------------------------------------------------------------------
- vmx_allocate_vmxon_regions()
- Allocate, clear and init VMXON regions for all CPUs.
- -------------------------------------------------------------------------- */
+* vmx_allocate_vmxon_regions()
+* Allocate, clear and init VMXON regions for all CPUs.
+* -------------------------------------------------------------------------- */
static void
vmx_allocate_vmxon_regions(void)
{
unsigned int i;
-
- for (i=0; i<real_ncpus; i++) {
+
+ for (i = 0; i < real_ncpus; i++) {
vmx_cpu_t *cpu = &cpu_datap(i)->cpu_vmx;
/* The size is defined to be always <= 4K, so we just allocate a page */
cpu->vmxon_region = vmx_pcalloc();
- if (NULL == cpu->vmxon_region)
+ if (NULL == cpu->vmxon_region) {
panic("vmx_allocate_vmxon_regions: unable to allocate VMXON region");
+ }
*(uint32_t*)(cpu->vmxon_region) = cpu->specs.vmcs_id;
}
}
/* -----------------------------------------------------------------------------
- vmx_free_vmxon_regions()
- Free VMXON regions for all CPUs.
- -------------------------------------------------------------------------- */
+* vmx_free_vmxon_regions()
+* Free VMXON regions for all CPUs.
+* -------------------------------------------------------------------------- */
static void
vmx_free_vmxon_regions(void)
{
unsigned int i;
- for (i=0; i<real_ncpus; i++) {
+ for (i = 0; i < real_ncpus; i++) {
vmx_cpu_t *cpu = &cpu_datap(i)->cpu_vmx;
vmx_pfree(cpu->vmxon_region);
}
/* -----------------------------------------------------------------------------
- vmx_globally_available()
- Checks whether VT can be turned on for all CPUs.
- -------------------------------------------------------------------------- */
+* vmx_globally_available()
+* Checks whether VT can be turned on for all CPUs.
+* -------------------------------------------------------------------------- */
static boolean_t
vmx_globally_available(void)
{
unsigned int i;
-
+ unsigned int ncpus = ml_wait_max_cpus();
boolean_t available = TRUE;
- for (i=0; i<real_ncpus; i++) {
+ for (i = 0; i < ncpus; i++) {
vmx_cpu_t *cpu = &cpu_datap(i)->cpu_vmx;
- if (!cpu->specs.vmx_present)
+ if (!cpu->specs.vmx_present) {
available = FALSE;
+ }
}
VMX_KPRINTF("VMX available: %d\n", available);
return available;
/* -----------------------------------------------------------------------------
- vmx_turn_on()
- Turn on VT operation on all CPUs.
- -------------------------------------------------------------------------- */
+* vmx_turn_on()
+* Turn on VT operation on all CPUs.
+* -------------------------------------------------------------------------- */
int
host_vmxon(boolean_t exclusive)
{
int error;
- boolean_t do_it = FALSE; /* do the cpu sync outside of the area holding the lock */
- if (!vmx_globally_available())
+ assert(0 == get_preemption_level());
+
+ if (!vmx_globally_available()) {
return VMX_UNSUPPORTED;
+ }
- simple_lock(&vmx_use_count_lock);
+ lck_mtx_lock(&vmx_lck_mtx);
- if (vmx_exclusive) {
+ if (vmx_exclusive || (exclusive && vmx_use_count)) {
error = VMX_INUSE;
} else {
- vmx_use_count++;
- if (vmx_use_count == 1) /* was turned off before */
- do_it = TRUE;
- vmx_exclusive = exclusive;
+ if (0 == vmx_use_count) {
+ vmx_allocate_vmxon_regions();
+ vmx_exclusive = exclusive;
+ vmx_use_count = 1;
+ mp_cpus_call(CPUMASK_ALL, ASYNC, vmx_on, NULL);
+ } else {
+ vmx_use_count++;
+ }
VMX_KPRINTF("VMX use count: %d\n", vmx_use_count);
error = VMX_OK;
}
- simple_unlock(&vmx_use_count_lock);
+ lck_mtx_unlock(&vmx_lck_mtx);
- if (do_it) {
- vmx_allocate_vmxon_regions();
- mp_rendezvous(NULL, (void (*)(void *))vmx_on, NULL, NULL);
- }
return error;
}
/* -----------------------------------------------------------------------------
- vmx_turn_off()
- Turn off VT operation on all CPUs.
- -------------------------------------------------------------------------- */
+* vmx_turn_off()
+* Turn off VT operation on all CPUs.
+* -------------------------------------------------------------------------- */
void
host_vmxoff()
{
- boolean_t do_it = FALSE; /* do the cpu sync outside of the area holding the lock */
+ assert(0 == get_preemption_level());
- simple_lock(&vmx_use_count_lock);
+ lck_mtx_lock(&vmx_lck_mtx);
- if (vmx_use_count) {
- vmx_use_count--;
+ if (1 == vmx_use_count) {
vmx_exclusive = FALSE;
- if (!vmx_use_count)
- do_it = TRUE;
- }
-
- simple_unlock(&vmx_use_count_lock);
-
- if (do_it) {
- mp_rendezvous(NULL, (void (*)(void *))vmx_off, NULL, NULL);
+ vmx_use_count = 0;
+ mp_cpus_call(CPUMASK_ALL, ASYNC, vmx_off, NULL);
vmx_free_vmxon_regions();
+ } else {
+ vmx_use_count--;
}
+ lck_mtx_unlock(&vmx_lck_mtx);
+
VMX_KPRINTF("VMX use count: %d\n", vmx_use_count);
}
/* -----------------------------------------------------------------------------
- vmx_suspend()
- Turn off VT operation on this CPU if it was on.
- Called when a CPU goes offline.
- -------------------------------------------------------------------------- */
+* vmx_suspend()
+* Turn off VT operation on this CPU if it was on.
+* Called when a CPU goes offline.
+* -------------------------------------------------------------------------- */
void
vmx_suspend()
{
VMX_KPRINTF("vmx_suspend\n");
- if (vmx_use_count)
- vmx_off();
+
+ if (vmx_use_count) {
+ vmx_off(NULL);
+ }
}
/* -----------------------------------------------------------------------------
- vmx_suspend()
- Restore the previous VT state. Called when CPU comes back online.
- -------------------------------------------------------------------------- */
+* vmx_suspend()
+* Restore the previous VT state. Called when CPU comes back online.
+* -------------------------------------------------------------------------- */
void
-vmx_resume()
+vmx_resume(boolean_t is_wake_from_hibernate)
{
VMX_KPRINTF("vmx_resume\n");
- vmx_init(); /* init VMX on CPU #0 */
- if (vmx_use_count)
- vmx_on();
+
+ vmx_enable();
+
+ if (vmx_use_count == 0) {
+ return;
+ }
+
+ /*
+ * When resuming from hiberate on the boot cpu,
+ * we must mark VMX as off since that's the state at wake-up
+ * because the restored state in memory records otherwise.
+ * This results in vmx_on() doing the right thing.
+ */
+ if (is_wake_from_hibernate) {
+ vmx_cpu_t *cpu = ¤t_cpu_datap()->cpu_vmx;
+ cpu->specs.vmx_on = FALSE;
+ }
+
+ vmx_on(NULL);
+}
+
+/* -----------------------------------------------------------------------------
+* vmx_hv_support()
+* Determine if the VMX feature set is sufficent for kernel HV support.
+* -------------------------------------------------------------------------- */
+boolean_t
+vmx_hv_support()
+{
+ if (!vmx_is_available()) {
+ return FALSE;
+ }
+
+#define CHK(msr, shift, mask) if (!VMX_CAP(msr, shift, mask)) return FALSE;
+
+ /* 'EPT' and 'Unrestricted Mode' are part of the secondary processor-based
+ * VM-execution controls */
+ CHK(MSR_IA32_VMX_BASIC, 0, VMX_BASIC_TRUE_CTLS)
+ CHK(MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 32, VMX_TRUE_PROCBASED_SECONDARY_CTLS)
+
+ /* if we have these, check for 'EPT' and 'Unrestricted Mode' */
+ CHK(MSR_IA32_VMX_PROCBASED_CTLS2, 32, VMX_PROCBASED_CTLS2_EPT)
+ CHK(MSR_IA32_VMX_PROCBASED_CTLS2, 32, VMX_PROCBASED_CTLS2_UNRESTRICTED)
+
+ return TRUE;
}
projects / apple / xnu.git / blobdiff