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hv: coding style: refine set_vcpuid_entries to one exit

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Fix procedure has more than one exit point.

Tracked-On: #861
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1 2018-12-20 18:35:35 +08:00 committed by wenlingz
parent e218075c69
commit 09634d8215
1 changed files with 101 additions and 93 deletions
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194
hypervisor/arch/x86/guest/vcpuid.c
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@ -190,113 +190,121 @@ int32_t set_vcpuid_entries(struct acrn_vm *vm)
entry.eax = 0x16U; entry.eax = 0x16U;
} }
result = set_vcpuid_entry(vm, &entry); result = set_vcpuid_entry(vm, &entry);
if (result != 0) { if (result == 0) {
return result; limit = entry.eax;
} vm->vcpuid_level = limit;
limit = entry.eax;
vm->vcpuid_level = limit;
for (i = 1U; i <= limit; i++) { for (i = 1U; i <= limit; i++) {
/* cpuid 1/0xb is percpu related */ /* cpuid 1/0xb is percpu related */
if ((i == 1U) || (i == 0xbU)) { if ((i == 1U) || (i == 0xbU)) {
continue; continue;
}
switch (i) {
case 0x02U:
{
uint32_t times;
init_vcpuid_entry(i, 0U, CPUID_CHECK_SUBLEAF, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
} }
times = entry.eax & 0xffUL; switch (i) {
for (j = 1U; j < times; j++) { case 0x02U:
init_vcpuid_entry(i, j, CPUID_CHECK_SUBLEAF, {
&entry); uint32_t times;
init_vcpuid_entry(i, 0U, CPUID_CHECK_SUBLEAF, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result == 0) {
times = entry.eax & 0xffUL;
for (j = 1U; j < times; j++) {
init_vcpuid_entry(i, j, CPUID_CHECK_SUBLEAF, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
/* wants to break out of switch */
break;
}
}
}
break;
}
case 0x04U:
for (j = 0U; ; j++) {
init_vcpuid_entry(i, j, CPUID_CHECK_SUBLEAF, &entry);
if (entry.eax == 0U) {
break;
}
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
/* wants to break out of switch */
break;
}
}
break;
case 0x0dU:
for (j = 0U; j < 64U; j++) {
init_vcpuid_entry(i, j, CPUID_CHECK_SUBLEAF, &entry);
if (entry.eax == 0U) {
continue;
}
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
/* wants to break out of switch */
break;
}
}
break;
/* These features are disabled */
/* PMU is not supported */
case 0x0aU:
/* Intel RDT */
case 0x0fU:
case 0x10U:
/* Intel SGX */
case 0x12U:
/* Intel Processor Trace */
case 0x14U:
break;
default:
init_vcpuid_entry(i, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry); result = set_vcpuid_entry(vm, &entry);
if (result != 0) { if (result != 0) {
return result; /* break out of switch */
}
}
break;
}
case 0x04U:
case 0x0dU:
for (j = 0U; ; j++) {
if ((i == 0x0dU) && (j == 64U)) {
break; break;
} }
break;
init_vcpuid_entry(i, j, CPUID_CHECK_SUBLEAF,
&entry);
if ((i == 0x04U) && (entry.eax == 0U)) {
break;
}
if ((i == 0x0dU) && (entry.eax == 0U)) {
continue;
}
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
}
} }
break;
/* These features are disabled */ /* WARNING: do nothing between break out of switch and before this check */
/* PMU is not supported */
case 0x0aU:
/* Intel RDT */
case 0x0fU:
case 0x10U:
/* Intel SGX */
case 0x12U:
/* Intel Processor Trace */
case 0x14U:
break;
default:
init_vcpuid_entry(i, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) { if (result != 0) {
return result; /* break out of for */
break;
}
}
if (result == 0) {
init_vcpuid_entry(0x40000000U, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result == 0) {
init_vcpuid_entry(0x40000010U, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
}
if (result == 0) {
init_vcpuid_entry(0x80000000U, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
}
if (result == 0) {
limit = entry.eax;
vm->vcpuid_xlevel = limit;
for (i = 0x80000001U; i <= limit; i++) {
init_vcpuid_entry(i, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
break;
}
}
} }
break;
} }
} }
init_vcpuid_entry(0x40000000U, 0U, 0U, &entry); return result;
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
}
init_vcpuid_entry(0x40000010U, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
}
init_vcpuid_entry(0x80000000U, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
}
limit = entry.eax;
vm->vcpuid_xlevel = limit;
for (i = 0x80000001U; i <= limit; i++) {
init_vcpuid_entry(i, 0U, 0U, &entry);
result = set_vcpuid_entry(vm, &entry);
if (result != 0) {
return result;
}
}
return 0;
} }
void guest_cpuid(struct acrn_vcpu *vcpu, void guest_cpuid(struct acrn_vcpu *vcpu,