hv: cpu: fix "Procedure has more than one exit point"
IEC 61508,ISO 26262 standards highly recommend single-exit rule. Reduce the count of the "return entries". Fix the violations which is comply with the cases list below: 1.Function has 2 return entries. 2.The first return entry is used to return the error code of checking variable whether is valid. Fix the violations in "if else" format. Tracked-On: #861 Signed-off-by: Huihuang Shi <huihuang.shi@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
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@ -67,12 +67,15 @@ bool cpu_has_cap(uint32_t bit)
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{
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uint32_t feat_idx = bit >> 5U;
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uint32_t feat_bit = bit & 0x1fU;
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bool ret;
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if (feat_idx >= FEATURE_WORDS) {
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return false;
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ret = false;
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} else {
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ret = ((boot_cpu_data.cpuid_leaves[feat_idx] & (1U << feat_bit)) != 0U);
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}
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return ((boot_cpu_data.cpuid_leaves[feat_idx] & (1U << feat_bit)) != 0U);
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return ret;
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}
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static inline bool get_monitor_cap(void)
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@ -710,11 +713,7 @@ void cpu_dead(uint16_t pcpu_id)
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*/
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int halt = 1;
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if (bitmap_test_and_clear_lock(pcpu_id, &pcpu_active_bitmap) == false) {
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pr_err("pcpu%hu already dead", pcpu_id);
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return;
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}
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if (bitmap_test_and_clear_lock(pcpu_id, &pcpu_active_bitmap)) {
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/* clean up native stuff */
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vmx_off(pcpu_id);
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cache_flush_invalidate_all();
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@ -726,6 +725,9 @@ void cpu_dead(uint16_t pcpu_id)
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do {
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hlt_cpu();
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} while (halt != 0);
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} else {
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pr_err("pcpu%hu already dead", pcpu_id);
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}
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}
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static void set_current_cpu_id(uint16_t pcpu_id)
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@ -804,10 +806,7 @@ static void ept_cap_detect(void)
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msr_val = msr_val >> 32U;
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/* Check if secondary processor based VM control is available. */
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if ((msr_val & VMX_PROCBASED_CTLS_SECONDARY) == 0UL) {
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return;
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}
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if ((msr_val & VMX_PROCBASED_CTLS_SECONDARY) != 0UL) {
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/* Read secondary processor based VM control. */
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msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS2);
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@ -815,6 +814,7 @@ static void ept_cap_detect(void)
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cpu_caps.ept_features = 1U;
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}
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}
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}
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static void apicv_cap_detect(void)
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{
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@ -63,22 +63,24 @@ static inline struct vcpuid_entry *find_vcpuid_entry(const struct acrn_vcpu *vcp
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return entry;
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}
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static inline int set_vcpuid_entry(struct acrn_vm *vm,
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static inline int32_t set_vcpuid_entry(struct acrn_vm *vm,
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const struct vcpuid_entry *entry)
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{
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struct vcpuid_entry *tmp;
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size_t entry_size = sizeof(struct vcpuid_entry);
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int32_t ret;
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if (vm->vcpuid_entry_nr == MAX_VM_VCPUID_ENTRIES) {
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pr_err("%s, vcpuid entry over MAX_VM_VCPUID_ENTRIES(%u)\n",
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__func__, MAX_VM_VCPUID_ENTRIES);
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return -ENOMEM;
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}
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ret = -ENOMEM;
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} else {
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tmp = &vm->vcpuid_entries[vm->vcpuid_entry_nr];
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vm->vcpuid_entry_nr++;
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(void)memcpy_s(tmp, entry_size, entry, entry_size);
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return 0;
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ret = 0;
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}
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return ret;
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}
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/**
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@ -320,10 +322,7 @@ void guest_cpuid(struct acrn_vcpu *vcpu,
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*ecx = 0U;
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*edx = 0U;
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}
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return;
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}
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} else {
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/* percpu related */
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switch (leaf) {
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case 0x01U:
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@ -419,3 +418,4 @@ void guest_cpuid(struct acrn_vcpu *vcpu,
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break;
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}
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}
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}
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