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HV: vlapic: minimize explicit casts by adjusting types

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To minimize explicit casts, this patch adjusts the types of function parameters
and structure fields related to vlapic and update the types in the internal
implementation accordingly.

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Dong Eddie <eddie.dong@intel.com>
This commit is contained in:
Junjie Mao 2018-07-13 17:11:27 +08:00 committed by lijinxia
parent e08a58ebe6
commit e3452cf804
6 changed files with 103 additions and 85 deletions
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167
hypervisor/arch/x86/guest/vlapic.c
View File

@ -473,9 +473,10 @@ vlapic_set_intr_ready(struct vlapic *vlapic, uint32_t vector, bool level)
return 1;
}
if (vlapic->ops.apicv_set_intr_ready != NULL)
if (vlapic->ops.apicv_set_intr_ready != NULL) {
return (*vlapic->ops.apicv_set_intr_ready)
(vlapic, vector, level);
}
idx = vector / 32U;
mask = 1U << (vector % 32U);
@ -501,7 +502,7 @@ vlapic_set_intr_ready(struct vlapic *vlapic, uint32_t vector, bool level)
return 1;
}
static inline int
static inline uint32_t
lvt_off_to_idx(uint32_t offset)
{
uint32_t index = ~0U;
@ -542,7 +543,7 @@ static inline uint32_t *
vlapic_get_lvtptr(struct vlapic *vlapic, uint32_t offset)
{
struct lapic_regs *lapic = vlapic->apic_page;
int i;
uint32_t i;
switch (offset) {
case APIC_OFFSET_CMCI_LVT:
@ -563,8 +564,7 @@ vlapic_get_lvtptr(struct vlapic *vlapic, uint32_t offset)
static inline uint32_t
vlapic_get_lvt(struct vlapic *vlapic, uint32_t offset)
{
int idx;
uint32_t val;
uint32_t idx, val;
idx = lvt_off_to_idx(offset);
val = atomic_load((int *)&vlapic->lvt_last[idx]);
@ -574,9 +574,8 @@ vlapic_get_lvt(struct vlapic *vlapic, uint32_t offset)
static void
vlapic_lvt_write_handler(struct vlapic *vlapic, uint32_t offset)
{
uint32_t *lvtptr, mask, val;
uint32_t *lvtptr, mask, val, idx;
struct lapic_regs *lapic;
int idx;
lapic = vlapic->apic_page;
lvtptr = vlapic_get_lvtptr(vlapic, offset);
@ -627,8 +626,9 @@ vlapic_lvt_write_handler(struct vlapic *vlapic, uint32_t offset)
"vpic wire mode -> NULL");
}
}
} else if (offset == APIC_OFFSET_TIMER_LVT)
} else if (offset == APIC_OFFSET_TIMER_LVT) {
vlapic_update_lvtt(vlapic, val);
}
*lvtptr = val;
atomic_store((int *)&vlapic->lvt_last[idx], val);
@ -821,6 +821,7 @@ vlapic_process_eoi(struct vlapic *vlapic)
return;
}
}
dev_dbg(ACRN_DBG_LAPIC, "Gratuitous EOI");
}
@ -925,9 +926,10 @@ vlapic_calcdest(struct vm *vm, uint64_t *dmask, uint32_t dest,
* Physical mode: destination is LAPIC ID.
*/
*dmask = 0UL;
vcpu_id = vm_apicid2vcpu_id(vm, dest);
if (vcpu_id < phys_cpu_num)
vcpu_id = vm_apicid2vcpu_id(vm, (uint8_t)dest);
if (vcpu_id < phys_cpu_num) {
bitmap_set(vcpu_id, dmask);
}
} else {
/*
* In the "Flat Model" the MDA is interpreted as an 8-bit wide
@ -966,8 +968,9 @@ vlapic_calcdest(struct vm *vm, uint64_t *dmask, uint32_t dest,
cluster = ldr >> 28;
ldest = (ldr >> 24) & 0xfU;
if (cluster != mda_cluster_id)
if (cluster != mda_cluster_id) {
continue;
}
mda_ldest = mda_cluster_ldest;
} else {
/*
@ -1008,7 +1011,7 @@ calcvdest(struct vm *vm, uint64_t *dmask, uint32_t dest, bool phys)
}
static void
vlapic_set_tpr(struct vlapic *vlapic, uint8_t val)
vlapic_set_tpr(struct vlapic *vlapic, uint32_t val)
{
struct lapic_regs *lapic = vlapic->apic_page;
@ -1020,7 +1023,7 @@ vlapic_set_tpr(struct vlapic *vlapic, uint8_t val)
}
}
static uint8_t
static uint32_t
vlapic_get_tpr(struct vlapic *vlapic)
{
struct lapic_regs *lapic = vlapic->apic_page;
@ -1031,7 +1034,7 @@ vlapic_get_tpr(struct vlapic *vlapic)
void
vlapic_set_cr8(struct vlapic *vlapic, uint64_t val)
{
uint8_t tpr;
uint32_t tpr;
if ((val & ~0xfUL) != 0U) {
struct vcpu *vcpu = vlapic->vcpu;
@ -1039,14 +1042,15 @@ vlapic_set_cr8(struct vlapic *vlapic, uint64_t val)
return;
}
tpr = val << 4;
/* It is safe to narrow val as the higher 60 bits are 0s. */
tpr = (uint32_t)val << 4U;
vlapic_set_tpr(vlapic, tpr);
}
uint64_t
vlapic_get_cr8(struct vlapic *vlapic)
{
uint8_t tpr;
uint32_t tpr;
tpr = vlapic_get_tpr(vlapic);
return (uint64_t)(tpr >> 4U);
@ -1058,20 +1062,21 @@ vlapic_icrlo_write_handler(struct vlapic *vlapic)
uint16_t vcpu_id;
bool phys;
uint64_t dmask = 0UL;
uint64_t icrval;
uint32_t dest, vec, mode, shorthand;
uint32_t icr_low, icr_high, dest;
uint32_t vec, mode, shorthand;
struct lapic_regs *lapic;
struct vcpu *target_vcpu;
lapic = vlapic->apic_page;
lapic->icr_lo &= ~APIC_DELSTAT_PEND;
icrval = ((uint64_t)lapic->icr_hi << 32) | lapic->icr_lo;
dest = icrval >> (32 + 24);
vec = icrval & APIC_VECTOR_MASK;
mode = icrval & APIC_DELMODE_MASK;
phys = ((icrval & APIC_DESTMODE_LOG) == 0UL);
shorthand = icrval & APIC_DEST_MASK;
icr_low = lapic->icr_lo;
icr_high = lapic->icr_hi;
dest = icr_high >> APIC_ID_SHIFT;
vec = icr_low & APIC_VECTOR_MASK;
mode = icr_low & APIC_DELMODE_MASK;
phys = ((icr_low & APIC_DESTMODE_LOG) == 0UL);
shorthand = icr_low & APIC_DEST_MASK;
if (mode == APIC_DELMODE_FIXED && vec < 16U) {
vlapic_set_error(vlapic, APIC_ESR_SEND_ILLEGAL_VECTOR);
@ -1080,7 +1085,8 @@ vlapic_icrlo_write_handler(struct vlapic *vlapic)
}
dev_dbg(ACRN_DBG_LAPIC,
"icrlo 0x%016llx triggered ipi %d", icrval, vec);
"icrlo 0x%08x icrhi 0x%08x triggered ipi %u",
icr_low, icr_high, vec);
if ((shorthand == APIC_DEST_SELF || shorthand == APIC_DEST_ALLISELF)
&& (mode == APIC_DELMODE_NMI || mode == APIC_DELMODE_INIT
@ -1123,7 +1129,7 @@ vlapic_icrlo_write_handler(struct vlapic *vlapic)
dev_dbg(ACRN_DBG_LAPIC,
"vlapic send ipi nmi to vcpu_id %hu", vcpu_id);
} else if (mode == APIC_DELMODE_INIT) {
if ((icrval & APIC_LEVEL_MASK) == APIC_LEVEL_DEASSERT) {
if ((icr_low & APIC_LEVEL_MASK) == APIC_LEVEL_DEASSERT) {
continue;
}
@ -1174,8 +1180,9 @@ vlapic_pending_intr(struct vlapic *vlapic, uint32_t *vecptr)
uint32_t i, vector, val, bitpos;
struct lapic_reg *irrptr;
if (vlapic->ops.apicv_pending_intr != NULL)
if (vlapic->ops.apicv_pending_intr != NULL) {
return (*vlapic->ops.apicv_pending_intr)(vlapic, vecptr);
}
irrptr = &lapic->irr[0];
@ -1203,7 +1210,7 @@ vlapic_intr_accepted(struct vlapic *vlapic, uint32_t vector)
{
struct lapic_regs *lapic = vlapic->apic_page;
struct lapic_reg *irrptr, *isrptr;
int idx, stk_top;
uint32_t idx, stk_top;
if (vlapic->ops.apicv_intr_accepted != NULL) {
vlapic->ops.apicv_intr_accepted(vlapic, vector);
@ -1234,7 +1241,7 @@ vlapic_intr_accepted(struct vlapic *vlapic, uint32_t vector)
panic("isrvec_stk_top overflow %u", stk_top);
}
vlapic->isrvec_stk[stk_top] = vector;
vlapic->isrvec_stk[stk_top] = (uint8_t)vector;
vlapic_update_ppr(vlapic);
}
@ -1283,11 +1290,11 @@ vlapic_svr_write_handler(struct vlapic *vlapic)
}
static int
vlapic_read(struct vlapic *vlapic, int mmio_access, uint64_t offset,
vlapic_read(struct vlapic *vlapic, int mmio_access, uint32_t offset,
uint64_t *data)
{
struct lapic_regs *lapic = vlapic->apic_page;
int i;
uint32_t i;
if (mmio_access == 0) {
/*
@ -1423,11 +1430,12 @@ done:
}
static int
vlapic_write(struct vlapic *vlapic, int mmio_access, uint64_t offset,
vlapic_write(struct vlapic *vlapic, int mmio_access, uint32_t offset,
uint64_t data)
{
struct lapic_regs *lapic = vlapic->apic_page;
uint32_t *regptr;
uint32_t data32 = (uint32_t)data;
int retval;
ASSERT((offset & 0xfU) == 0U && offset < CPU_PAGE_SIZE,
@ -1453,33 +1461,33 @@ vlapic_write(struct vlapic *vlapic, int mmio_access, uint64_t offset,
retval = 0;
switch (offset) {
case APIC_OFFSET_ID:
lapic->id = data;
lapic->id = data32;
vlapic_id_write_handler(vlapic);
break;
case APIC_OFFSET_TPR:
vlapic_set_tpr(vlapic, data & 0xffUL);
vlapic_set_tpr(vlapic, data32 & 0xffU);
break;
case APIC_OFFSET_EOI:
vlapic_process_eoi(vlapic);
break;
case APIC_OFFSET_LDR:
lapic->ldr = data;
lapic->ldr = data32;
vlapic_ldr_write_handler(vlapic);
break;
case APIC_OFFSET_DFR:
lapic->dfr = data;
lapic->dfr = data32;
vlapic_dfr_write_handler(vlapic);
break;
case APIC_OFFSET_SVR:
lapic->svr = data;
lapic->svr = data32;
vlapic_svr_write_handler(vlapic);
break;
case APIC_OFFSET_ICR_LOW:
lapic->icr_lo = data;
lapic->icr_lo = data32;
retval = vlapic_icrlo_write_handler(vlapic);
break;
case APIC_OFFSET_ICR_HI:
lapic->icr_hi = data;
lapic->icr_hi = data32;
break;
case APIC_OFFSET_CMCI_LVT:
case APIC_OFFSET_TIMER_LVT:
@ -1489,7 +1497,7 @@ vlapic_write(struct vlapic *vlapic, int mmio_access, uint64_t offset,
case APIC_OFFSET_LINT1_LVT:
case APIC_OFFSET_ERROR_LVT:
regptr = vlapic_get_lvtptr(vlapic, offset);
*regptr = data;
*regptr = data32;
vlapic_lvt_write_handler(vlapic, offset);
break;
case APIC_OFFSET_TIMER_ICR:
@ -1497,12 +1505,12 @@ vlapic_write(struct vlapic *vlapic, int mmio_access, uint64_t offset,
if (vlapic_lvtt_tsc_deadline(vlapic)) {
break;
}
lapic->icr_timer = data;
lapic->icr_timer = data32;
vlapic_icrtmr_write_handler(vlapic);
break;
case APIC_OFFSET_TIMER_DCR:
lapic->dcr_timer = data;
lapic->dcr_timer = data32;
vlapic_dcr_write_handler(vlapic);
break;
@ -1645,7 +1653,7 @@ vlapic_set_apicbase(struct vlapic *vlapic, uint64_t new)
void
vlapic_deliver_intr(struct vm *vm, bool level, uint32_t dest, bool phys,
int delmode, int vec)
uint32_t delmode, uint32_t vec)
{
bool lowprio;
uint16_t vcpu_id;
@ -1706,8 +1714,7 @@ vlapic_set_tmr(struct vlapic *vlapic, uint32_t vector, bool level)
{
struct lapic_regs *lapic;
struct lapic_reg *tmrptr;
uint32_t mask;
int idx;
uint32_t mask, idx;
lapic = vlapic->apic_page;
tmrptr = &lapic->tmr[0];
@ -1757,7 +1764,7 @@ vlapic_reset_tmr(struct vlapic *vlapic)
}
void
vlapic_set_tmr_one_vec(struct vlapic *vlapic, __unused int delmode,
vlapic_set_tmr_one_vec(struct vlapic *vlapic, uint32_t delmode,
uint32_t vector, bool level)
{
ASSERT(vector <= NR_MAX_VECTOR,
@ -1845,7 +1852,7 @@ vlapic_set_local_intr(struct vm *vm, uint16_t vcpu_id, uint32_t vector)
int
vlapic_intr_msi(struct vm *vm, uint64_t addr, uint64_t msg)
{
int delmode, vec;
uint32_t delmode, vec;
uint32_t dest;
bool phys;
@ -1867,11 +1874,11 @@ vlapic_intr_msi(struct vm *vm, uint64_t addr, uint64_t msg)
* the Redirection Hint and Destination Mode are '1' and
* physical otherwise.
*/
dest = (addr >> 12) & 0xffU;
dest = (uint32_t)(addr >> 12U) & 0xffU;
phys = ((addr & (MSI_ADDR_RH | MSI_ADDR_LOG)) !=
(MSI_ADDR_RH | MSI_ADDR_LOG));
delmode = msg & APIC_DELMODE_MASK;
vec = msg & 0xffUL;
delmode = (uint32_t)msg & APIC_DELMODE_MASK;
vec = (uint32_t)msg & 0xffU;
dev_dbg(ACRN_DBG_LAPIC, "lapic MSI %s dest %#x, vec %u",
phys ? "physical" : "logical", dest, vec);
@ -1899,7 +1906,6 @@ x2apic_msr_to_regoff(uint32_t msr)
bool
is_vlapic_msr(uint32_t msr)
{
if (is_x2apic_msr(msr) || (msr == MSR_IA32_APIC_BASE)) {
return true;
} else {
@ -1987,19 +1993,20 @@ vlapic_wrmsr(struct vcpu *vcpu, uint32_t msr, uint64_t val)
}
int
vlapic_write_mmio_reg(struct vcpu *vcpu, uint64_t gpa, uint64_t wval, int size)
vlapic_write_mmio_reg(struct vcpu *vcpu, uint64_t gpa, uint64_t wval,
uint8_t size)
{
int error;
uint64_t off;
uint32_t off;
struct vlapic *vlapic;
off = gpa - DEFAULT_APIC_BASE;
off = (uint32_t)(gpa - DEFAULT_APIC_BASE);
/*
* Memory mapped local apic accesses must be 4 bytes wide and
* aligned on a 16-byte boundary.
*/
if (size != 4 || (off & 0xfUL) != 0U) {
if (size != 4U || (off & 0xfU) != 0U) {
return -EINVAL;
}
@ -2010,21 +2017,21 @@ vlapic_write_mmio_reg(struct vcpu *vcpu, uint64_t gpa, uint64_t wval, int size)
int
vlapic_read_mmio_reg(struct vcpu *vcpu, uint64_t gpa, uint64_t *rval,
__unused int size)
__unused uint8_t size)
{
int error;
uint64_t off;
uint32_t off;
struct vlapic *vlapic;
off = gpa - DEFAULT_APIC_BASE;
off = (uint32_t)(gpa - DEFAULT_APIC_BASE);
/*
* Memory mapped local apic accesses should be aligned on a
* 16-byte boundary. They are also suggested to be 4 bytes
* wide, alas not all OSes follow suggestions.
*/
off &= ~0x3UL;
if ((off & 0xfUL) != 0UL) {
off &= ~0x3U;
if ((off & 0xfU) != 0U) {
return -EINVAL;
}
@ -2154,15 +2161,16 @@ apicv_set_intr_ready(struct vlapic *vlapic, uint32_t vector, __unused bool level
{
struct pir_desc *pir_desc;
uint64_t mask;
int idx, notify;
uint32_t idx;
int32_t notify;
pir_desc = vlapic->pir_desc;
idx = vector / 64;
idx = vector / 64U;
mask = 1UL << (vector % 64U);
atomic_set_long(&pir_desc->pir[idx], mask);
notify = (atomic_cmpxchg64((long *)&pir_desc->pending, 0, 1) == 0);
notify = (atomic_cmpxchg64((long *)&pir_desc->pending, 0, 1) == 0) ? 1 : 0;
return notify;
}
@ -2197,6 +2205,7 @@ apicv_pending_intr(struct vlapic *vlapic, __unused uint32_t *vecptr)
return (vpr > ppr) ? 1 : 0;
}
}
return 0;
}
@ -2285,8 +2294,9 @@ apicv_inject_pir(struct vlapic *vlapic)
struct lapic_reg *irr = NULL;
pir_desc = vlapic->pir_desc;
if (atomic_cmpxchg64((long *)&pir_desc->pending, 1, 0) != 1)
if (atomic_cmpxchg64((long *)(&pir_desc->pending), 1, 0) != 1) {
return;
}
pirval = 0UL;
lapic = vlapic->apic_page;
@ -2294,9 +2304,9 @@ apicv_inject_pir(struct vlapic *vlapic)
for (i = 0U; i < 4U; i++) {
val = atomic_readandclear64((long *)&pir_desc->pir[i]);
if (val != 0) {
irr[i * 2U].val |= val;
irr[(i * 2U) + 1U].val |= val >> 32;
if (val != 0UL) {
irr[i * 2U].val |= (uint32_t)val;
irr[(i * 2U) + 1U].val |= (uint32_t)(val >> 32);
pirbase = 64U*i;
pirval = val;
@ -2341,16 +2351,17 @@ apicv_inject_pir(struct vlapic *vlapic)
int apic_access_vmexit_handler(struct vcpu *vcpu)
{
int access_type, offset = 0, err = 0;
uint64_t qual;
int err = 0;
uint32_t offset = 0U;
uint64_t qual, access_type;
struct vlapic *vlapic;
qual = vcpu->arch_vcpu.exit_qualification;
access_type = APIC_ACCESS_TYPE(qual);
/*parse offset if linear access*/
if (access_type <= 3) {
offset = APIC_ACCESS_OFFSET(qual);
if (access_type <= 3UL) {
offset = (uint32_t)APIC_ACCESS_OFFSET(qual);
}
vlapic = vcpu->arch_vcpu.vlapic;
@ -2363,10 +2374,11 @@ int apic_access_vmexit_handler(struct vcpu *vcpu)
return err;
}
if (access_type == 1) {
if (emulate_instruction(vcpu) == 0)
if (access_type == 1UL) {
if (emulate_instruction(vcpu) == 0) {
err = vlapic_write(vlapic, 1, offset, vcpu->mmio.value);
} else if (access_type == 0) {
}
} else if (access_type == 0UL) {
err = vlapic_read(vlapic, 1, offset, &vcpu->mmio.value);
if (err < 0) {
return err;
@ -2391,7 +2403,7 @@ int veoi_vmexit_handler(struct vcpu *vcpu)
vlapic = vcpu->arch_vcpu.vlapic;
lapic = vlapic->apic_page;
vector = (vcpu->arch_vcpu.exit_qualification) & 0xFFUL;
vector = (uint32_t)(vcpu->arch_vcpu.exit_qualification & 0xFFUL);
tmrptr = &lapic->tmr[0];
idx = vector / 32U;
@ -2410,11 +2422,12 @@ int veoi_vmexit_handler(struct vcpu *vcpu)
int apic_write_vmexit_handler(struct vcpu *vcpu)
{
uint64_t qual;
int error, handled, offset;
int error, handled;
uint32_t offset;
struct vlapic *vlapic = NULL;
qual = vcpu->arch_vcpu.exit_qualification;
offset = (qual & 0xFFFUL);
offset = (uint32_t)(qual & 0xFFFUL);
handled = 1;
vcpu_retain_rip(vcpu);

3
hypervisor/include/arch/x86/guest/guest.h
View File

@ -16,6 +16,8 @@
#ifndef ASSEMBLER
#include <mmu.h>
#define foreach_vcpu(idx, vm, vcpu) \
for (idx = 0U, vcpu = vm->hw.vcpu_array[idx]; \
(idx < vm->hw.num_vcpus) && (vcpu != NULL); \
@ -110,6 +112,7 @@ int wrmsr_vmexit_handler(struct vcpu *vcpu);
void init_msr_emulation(struct vcpu *vcpu);
extern const char vm_exit[];
struct run_context;
int vmx_vmrun(struct run_context *context, int ops, int ibrs);
int load_guest(struct vm *vm, struct vcpu *vcpu);

4
hypervisor/include/arch/x86/guest/vcpu.h
View File

@ -77,6 +77,8 @@
#ifndef ASSEMBLER
#include <guest.h>
enum vcpu_state {
VCPU_INIT,
VCPU_RUNNING,
@ -217,7 +219,7 @@ struct vcpu_arch {
uint32_t inst_len;
/* Information related to secondary / AP VCPU start-up */
uint8_t cpu_mode;
enum vm_cpu_mode cpu_mode;
uint8_t nr_sipi;
uint32_t sipi_vector;

8
hypervisor/include/arch/x86/guest/vlapic.h
View File

@ -63,9 +63,9 @@ int vlapic_rdmsr(struct vcpu *vcpu, uint32_t msr, uint64_t *rval);
int vlapic_wrmsr(struct vcpu *vcpu, uint32_t msr, uint64_t wval);
int vlapic_read_mmio_reg(struct vcpu *vcpu, uint64_t gpa,
uint64_t *rval, int size);
uint64_t *rval, uint8_t size);
int vlapic_write_mmio_reg(struct vcpu *vcpu, uint64_t gpa,
uint64_t wval, int size);
uint64_t wval, uint8_t size);
/*
* Signals to the LAPIC that an interrupt at 'vector' needs to be generated
@ -96,7 +96,7 @@ int vlapic_set_local_intr(struct vm *vm, uint16_t vcpu_id, uint32_t vector);
int vlapic_intr_msi(struct vm *vm, uint64_t addr, uint64_t msg);
void vlapic_deliver_intr(struct vm *vm, bool level, uint32_t dest,
bool phys, int delmode, int vec);
bool phys, uint32_t delmode, uint32_t vec);
/* Reset the trigger-mode bits for all vectors to be edge-triggered */
void vlapic_reset_tmr(struct vlapic *vlapic);
@ -106,7 +106,7 @@ void vlapic_reset_tmr(struct vlapic *vlapic);
* the (dest,phys,delmode) tuple resolves to an interrupt being delivered to
* this 'vlapic'.
*/
void vlapic_set_tmr_one_vec(struct vlapic *vlapic, int delmode,
void vlapic_set_tmr_one_vec(struct vlapic *vlapic, uint32_t delmode,
uint32_t vector, bool level);
void

2
hypervisor/include/arch/x86/guest/vm.h
View File

@ -134,7 +134,7 @@ struct vm {
enum vm_state state; /* VM state */
void *vuart; /* Virtual UART */
struct vpic *vpic; /* Virtual PIC */
uint32_t vpic_wire_mode;
enum vpic_wire_mode vpic_wire_mode;
struct iommu_domain *iommu_domain; /* iommu domain of this VM */
struct list_head list; /* list of VM */
spinlock_t spinlock; /* Spin-lock used to protect VM modifications */

2
hypervisor/include/arch/x86/vmx.h
View File

@ -432,7 +432,7 @@ int vmx_write_cr0(struct vcpu *vcpu, uint64_t cr0);
int vmx_write_cr3(struct vcpu *vcpu, uint64_t cr3);
int vmx_write_cr4(struct vcpu *vcpu, uint64_t cr4);
static inline uint8_t get_vcpu_mode(struct vcpu *vcpu)
static inline enum vm_cpu_mode get_vcpu_mode(struct vcpu *vcpu)
{
return vcpu->arch_vcpu.cpu_mode;
}