void __init init_apic_mappings(void)
{
unsigned long apic_phys;
if ( x2apic_enabled )
goto __next;
/*
* If no local APIC can be found then set up a fake all
* zeroes page to simulate the local APIC and another
* one for the IO-APIC.
*/
if (!smp_found_config && detect_init_APIC()) {
apic_phys = __pa(alloc_xenheap_page());
clear_page(__va(apic_phys));
} else
apic_phys = mp_lapic_addr;
set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n", APIC_BASE,
apic_phys);
__next:
/*
* Fetch the APIC ID of the BSP in case we have a
* default configuration (or the MP table is broken).
*/
if (boot_cpu_physical_apicid == -1U)
boot_cpu_physical_apicid = get_apic_id();
x86_cpu_to_apicid[0] = get_apic_id();
init_ioapic_mappings();
}
int vmx_add_host_load_msr(struct vcpu *v, u32 msr)
{
unsigned int i, msr_count = v->arch.hvm_vmx.host_msr_count;
struct vmx_msr_entry *msr_area = v->arch.hvm_vmx.host_msr_area;
for ( i = 0; i < msr_count; i++ )
if ( msr_area[i].index == msr )
return 0;
if ( msr_count == (PAGE_SIZE / sizeof(struct vmx_msr_entry)) )
return -ENOSPC;
if ( msr_area == NULL )
{
if ( (msr_area = alloc_xenheap_page()) == NULL )
return -ENOMEM;
v->arch.hvm_vmx.host_msr_area = msr_area;
__vmwrite(VM_EXIT_MSR_LOAD_ADDR, virt_to_maddr(msr_area));
}
msr_area[msr_count].index = msr;
msr_area[msr_count].mbz = 0;
rdmsrl(msr, msr_area[msr_count].data);
v->arch.hvm_vmx.host_msr_count = ++msr_count;
__vmwrite(VM_EXIT_MSR_LOAD_COUNT, msr_count);
return 0;
}
static inline int
get_maptrack_handle(
struct grant_table *lgt)
{
int i;
grant_handle_t handle;
struct grant_mapping *new_mt;
unsigned int new_mt_limit, nr_frames;
if ( unlikely((handle = __get_maptrack_handle(lgt)) == -1) )
{
spin_lock(&lgt->lock);
if ( unlikely((handle = __get_maptrack_handle(lgt)) == -1) )
{
nr_frames = nr_maptrack_frames(lgt);
if ( nr_frames >= max_nr_maptrack_frames() )
{
spin_unlock(&lgt->lock);
return -1;
}
new_mt = alloc_xenheap_page();
if ( new_mt == NULL )
{
spin_unlock(&lgt->lock);
return -1;
}
clear_page(new_mt);
new_mt_limit = lgt->maptrack_limit + MAPTRACK_PER_PAGE;
for ( i = lgt->maptrack_limit; i < new_mt_limit; i++ )
{
new_mt[i % MAPTRACK_PER_PAGE].ref = i+1;
new_mt[i % MAPTRACK_PER_PAGE].flags = 0;
}
lgt->maptrack[nr_frames] = new_mt;
lgt->maptrack_limit = new_mt_limit;
gdprintk(XENLOG_INFO,
"Increased maptrack size to %u frames.\n", nr_frames + 1);
handle = __get_maptrack_handle(lgt);
}
spin_unlock(&lgt->lock);
}
return handle;
}
struct host_save_area *alloc_host_save_area(void)
{
struct host_save_area *hsa;
hsa = alloc_xenheap_page();
if ( hsa == NULL )
{
printk(XENLOG_WARNING "Warning: failed to allocate hsa.\n");
return NULL;
}
clear_page(hsa);
return hsa;
}
struct vmcb_struct *alloc_vmcb(void)
{
struct vmcb_struct *vmcb;
vmcb = alloc_xenheap_page();
if ( vmcb == NULL )
{
printk(XENLOG_WARNING "Warning: failed to allocate vmcb.\n");
return NULL;
}
clear_page(vmcb);
return vmcb;
}
static struct vmcs_struct *vmx_alloc_vmcs(void)
{
struct vmcs_struct *vmcs;
if ( (vmcs = alloc_xenheap_page()) == NULL )
{
gdprintk(XENLOG_WARNING, "Failed to allocate VMCS.\n");
return NULL;
}
clear_page(vmcs);
vmcs->vmcs_revision_id = vmcs_revision_id;
return vmcs;
}
static int construct_vmcs(struct vcpu *v)
{
uint16_t sysenter_cs;
unsigned long sysenter_eip;
vmx_vmcs_enter(v);
/* VMCS controls. */
__vmwrite(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_control);
__vmwrite(VM_EXIT_CONTROLS, vmx_vmexit_control);
__vmwrite(VM_ENTRY_CONTROLS, vmx_vmentry_control);
__vmwrite(CPU_BASED_VM_EXEC_CONTROL, vmx_cpu_based_exec_control);
v->arch.hvm_vmx.exec_control = vmx_cpu_based_exec_control;
if ( vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS )
__vmwrite(SECONDARY_VM_EXEC_CONTROL, vmx_secondary_exec_control);
/* MSR access bitmap. */
if ( cpu_has_vmx_msr_bitmap )
{
char *msr_bitmap = alloc_xenheap_page();
if ( msr_bitmap == NULL )
return -ENOMEM;
memset(msr_bitmap, ~0, PAGE_SIZE);
v->arch.hvm_vmx.msr_bitmap = msr_bitmap;
__vmwrite(MSR_BITMAP, virt_to_maddr(msr_bitmap));
vmx_disable_intercept_for_msr(v, MSR_FS_BASE);
vmx_disable_intercept_for_msr(v, MSR_GS_BASE);
vmx_disable_intercept_for_msr(v, MSR_IA32_SYSENTER_CS);
vmx_disable_intercept_for_msr(v, MSR_IA32_SYSENTER_ESP);
vmx_disable_intercept_for_msr(v, MSR_IA32_SYSENTER_EIP);
}
/* I/O access bitmap. */
__vmwrite(IO_BITMAP_A, virt_to_maddr(hvm_io_bitmap));
__vmwrite(IO_BITMAP_B, virt_to_maddr(hvm_io_bitmap + PAGE_SIZE));
/* Host GDTR base. */
__vmwrite(HOST_GDTR_BASE, GDT_VIRT_START(v));
/* Host data selectors. */
__vmwrite(HOST_SS_SELECTOR, __HYPERVISOR_DS);
__vmwrite(HOST_DS_SELECTOR, __HYPERVISOR_DS);
__vmwrite(HOST_ES_SELECTOR, __HYPERVISOR_DS);
__vmwrite(HOST_FS_SELECTOR, 0);
__vmwrite(HOST_GS_SELECTOR, 0);
__vmwrite(HOST_FS_BASE, 0);
__vmwrite(HOST_GS_BASE, 0);
/* Host control registers. */
v->arch.hvm_vmx.host_cr0 = read_cr0() | X86_CR0_TS;
__vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
__vmwrite(HOST_CR4, mmu_cr4_features);
/* Host CS:RIP. */
__vmwrite(HOST_CS_SELECTOR, __HYPERVISOR_CS);
__vmwrite(HOST_RIP, (unsigned long)vmx_asm_vmexit_handler);
/* Host SYSENTER CS:RIP. */
rdmsrl(MSR_IA32_SYSENTER_CS, sysenter_cs);
__vmwrite(HOST_SYSENTER_CS, sysenter_cs);
rdmsrl(MSR_IA32_SYSENTER_EIP, sysenter_eip);
__vmwrite(HOST_SYSENTER_EIP, sysenter_eip);
/* MSR intercepts. */
__vmwrite(VM_EXIT_MSR_LOAD_COUNT, 0);
__vmwrite(VM_EXIT_MSR_STORE_COUNT, 0);
__vmwrite(VM_ENTRY_MSR_LOAD_COUNT, 0);
__vmwrite(VM_ENTRY_INTR_INFO, 0);
__vmwrite(CR0_GUEST_HOST_MASK, ~0UL);
__vmwrite(CR4_GUEST_HOST_MASK, ~0UL);
__vmwrite(PAGE_FAULT_ERROR_CODE_MASK, 0);
__vmwrite(PAGE_FAULT_ERROR_CODE_MATCH, 0);
__vmwrite(CR3_TARGET_COUNT, 0);
__vmwrite(GUEST_ACTIVITY_STATE, 0);
/* Guest segment bases. */
__vmwrite(GUEST_ES_BASE, 0);
__vmwrite(GUEST_SS_BASE, 0);
__vmwrite(GUEST_DS_BASE, 0);
__vmwrite(GUEST_FS_BASE, 0);
__vmwrite(GUEST_GS_BASE, 0);
__vmwrite(GUEST_CS_BASE, 0);
/* Guest segment limits. */
__vmwrite(GUEST_ES_LIMIT, ~0u);
__vmwrite(GUEST_SS_LIMIT, ~0u);
__vmwrite(GUEST_DS_LIMIT, ~0u);
__vmwrite(GUEST_FS_LIMIT, ~0u);
__vmwrite(GUEST_GS_LIMIT, ~0u);
__vmwrite(GUEST_CS_LIMIT, ~0u);
/* Guest segment AR bytes. */
__vmwrite(GUEST_ES_AR_BYTES, 0xc093); /* read/write, accessed */
__vmwrite(GUEST_SS_AR_BYTES, 0xc093);
__vmwrite(GUEST_DS_AR_BYTES, 0xc093);
__vmwrite(GUEST_FS_AR_BYTES, 0xc093);
__vmwrite(GUEST_GS_AR_BYTES, 0xc093);
__vmwrite(GUEST_CS_AR_BYTES, 0xc09b); /* exec/read, accessed */
/* Guest IDT. */
__vmwrite(GUEST_IDTR_BASE, 0);
__vmwrite(GUEST_IDTR_LIMIT, 0);
/* Guest GDT. */
__vmwrite(GUEST_GDTR_BASE, 0);
__vmwrite(GUEST_GDTR_LIMIT, 0);
/* Guest LDT. */
__vmwrite(GUEST_LDTR_AR_BYTES, 0x0082); /* LDT */
__vmwrite(GUEST_LDTR_SELECTOR, 0);
__vmwrite(GUEST_LDTR_BASE, 0);
__vmwrite(GUEST_LDTR_LIMIT, 0);
/* Guest TSS. */
__vmwrite(GUEST_TR_AR_BYTES, 0x008b); /* 32-bit TSS (busy) */
__vmwrite(GUEST_TR_BASE, 0);
__vmwrite(GUEST_TR_LIMIT, 0xff);
__vmwrite(GUEST_INTERRUPTIBILITY_INFO, 0);
__vmwrite(GUEST_DR7, 0);
__vmwrite(VMCS_LINK_POINTER, ~0UL);
#if defined(__i386__)
__vmwrite(VMCS_LINK_POINTER_HIGH, ~0UL);
#endif
__vmwrite(EXCEPTION_BITMAP, (HVM_TRAP_MASK |
(1U << TRAP_page_fault) |
(1U << TRAP_no_device)));
v->arch.hvm_vcpu.guest_cr[0] = X86_CR0_PE | X86_CR0_ET;
hvm_update_guest_cr(v, 0);
v->arch.hvm_vcpu.guest_cr[4] = 0;
hvm_update_guest_cr(v, 4);
if ( cpu_has_vmx_tpr_shadow )
{
__vmwrite(VIRTUAL_APIC_PAGE_ADDR,
page_to_maddr(vcpu_vlapic(v)->regs_page));
__vmwrite(TPR_THRESHOLD, 0);
}
vmx_vmcs_exit(v);
paging_update_paging_modes(v); /* will update HOST & GUEST_CR3 as reqd */
vmx_vlapic_msr_changed(v);
return 0;
}
