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hv: hypercall: fix complicated violations of "Procedure has more than one exit point" 

Fix the complicated violations by methods list below:
1.if ... else ... fmt.
2.add status in proper position.
    example:
        bool bdf_valid;(could find this variable in this patch).

V1->V2:
    merge branches.

Tracked-On: #861
Signed-off-by: Huihuang Shi <huihuang.shi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Huihuang Shi 2018-12-26 10:18:22 +08:00 committed by wenlingz
parent f680ed5d6a
commit d6a2268282
1 changed files with 109 additions and 106 deletions
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115
hypervisor/common/hypercall.c
View File

@ -469,7 +469,7 @@ int32_t hcall_notify_ioreq_finish(uint16_t vmid, uint16_t vcpu_id)
/* make sure we have set req_buf */
if ((target_vm == NULL) || (target_vm->sw.io_shared_page == NULL)) {
pr_err("%s, invalid parameter\n", __func__);
pr_err("%p %s, invalid parameter\n", target_vm, __func__);
ret = -EINVAL;
} else {
dev_dbg(ACRN_DBG_HYCALL, "[%d] NOTIFY_FINISH for vcpu %d",
@ -584,41 +584,38 @@ int32_t hcall_set_vm_memory_regions(struct acrn_vm *vm, uint64_t param)
struct vm_memory_region mr;
struct acrn_vm *target_vm;
uint32_t idx;
int32_t ret = 0;
(void)memset((void *)&regions, 0U, sizeof(regions));
if (copy_from_gpa(vm, &regions, param, sizeof(regions)) != 0) {
pr_err("%s: Unable copy param from vm\n", __func__);
return -EFAULT;
}
ret = -EFAULT;
} else {
target_vm = get_vm_from_vmid(regions.vmid);
if (target_vm == NULL) {
return -EINVAL;
}
if (is_vm0(target_vm)) {
pr_err("%s: Targeting to service vm", __func__);
return -EFAULT;
}
if ((target_vm == NULL) || is_vm0(target_vm)) {
pr_err("%p %s:target_vm is invalid or Targeting to service vm", target_vm, __func__);
ret = -EFAULT;
} else {
idx = 0U;
while (idx < regions.mr_num) {
int32_t ret;
if (copy_from_gpa(vm, &mr, regions.regions_gpa + idx * sizeof(mr), sizeof(mr)) != 0) {
pr_err("%s: Copy mr entry fail from vm\n", __func__);
return -EFAULT;
ret = -EFAULT;
break;
}
ret = set_vm_memory_region(vm, target_vm, &mr);
if (ret < 0) {
return ret;
break;
}
idx++;
}
return 0;
}
}
return ret;
}
/**
@ -708,29 +705,26 @@ int32_t hcall_write_protect_page(struct acrn_vm *vm, uint16_t vmid, uint64_t wp_
*/
int32_t hcall_gpa_to_hpa(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = 0;
int32_t ret;
struct vm_gpa2hpa v_gpa2hpa;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
return -1;
}
(void)memset((void *)&v_gpa2hpa, 0U, sizeof(v_gpa2hpa));
if (copy_from_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
pr_err("HCALL gpa2hpa: Unable copy param from vm\n");
return -1;
}
if ((target_vm == NULL) || copy_from_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
pr_err("target_vm is invalid or HCALL gpa2hpa: Unable copy param from vm\n");
ret = -1;
} else {
v_gpa2hpa.hpa = gpa2hpa(target_vm, v_gpa2hpa.gpa);
if (v_gpa2hpa.hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%llx,GPA is unmapping.",
__func__, target_vm->vm_id, v_gpa2hpa.gpa);
return -EINVAL;
}
if (copy_to_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
ret = -EINVAL;
} else if (copy_to_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
return -1;
ret = -1;
} else {
ret = 0;
}
}
return ret;
@ -753,39 +747,46 @@ int32_t hcall_assign_ptdev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
int32_t ret;
uint16_t bdf;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
bool bdf_valid = true;
bool iommu_valid = true;
if (target_vm == NULL) {
pr_err("%s, vm is null\n", __func__);
return -EINVAL;
}
if (target_vm != NULL) {
if (param < 0x10000UL) {
bdf = (uint16_t) param;
} else {
if (copy_from_gpa(vm, &bdf, param, sizeof(bdf)) != 0) {
pr_err("%s: Unable copy param from vm %d\n",
__func__, vm->vm_id);
return -EIO;
bdf_valid = false;
ret = -EIO;
}
}
/* create a iommu domain for target VM if not created */
if (target_vm->iommu == NULL) {
if (bdf_valid && target_vm->iommu == NULL) {
if (target_vm->arch_vm.nworld_eptp == NULL) {
pr_err("%s, EPT of VM not set!\n",
__func__, target_vm->vm_id);
return -EPERM;
}
iommu_valid = false;
ret = -EPERM;
} else {
/* TODO: how to get vm's address width? */
target_vm->iommu = create_iommu_domain(vmid,
hva2hpa(target_vm->arch_vm.nworld_eptp), 48U);
if (target_vm->iommu == NULL) {
return -ENODEV;
iommu_valid = false;
ret = -ENODEV;
}
}
}
if (bdf_valid && iommu_valid) {
ret = assign_iommu_device(target_vm->iommu,
(uint8_t)(bdf >> 8U), (uint8_t)(bdf & 0xffU));
}
} else {
pr_err("%s, vm is null\n", __func__);
ret = -EINVAL;
}
return ret;
}
@ -806,22 +807,27 @@ int32_t hcall_deassign_ptdev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = 0;
uint16_t bdf;
bool bdf_valid = true;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
return -1;
}
ret = -1;
} else {
if (param < 0x10000UL) {
bdf = (uint16_t) param;
} else {
if (copy_from_gpa(vm, &bdf, param, sizeof(bdf)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
return -1;
bdf_valid = false;
ret = -1;
}
}
if (bdf_valid) {
ret = unassign_iommu_device(target_vm->iommu,
(uint8_t)(bdf >> 8U), (uint8_t)(bdf & 0xffU));
}
}
return ret;
}
@ -843,17 +849,13 @@ int32_t hcall_set_ptdev_intr_info(struct acrn_vm *vm, uint16_t vmid, uint64_t pa
struct hc_ptdev_irq irq;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
return -1;
}
(void)memset((void *)&irq, 0U, sizeof(irq));
if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
if (target_vm == NULL) {
ret = -1;
} else if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
return -1;
}
ret = -1;
} else {
/* Inform vPCI about the interupt info changes */
#ifndef CONFIG_PARTITION_MODE
vpci_set_ptdev_intr_info(target_vm, irq.virt_bdf, irq.phys_bdf);
@ -870,6 +872,7 @@ int32_t hcall_set_ptdev_intr_info(struct acrn_vm *vm, uint16_t vmid, uint64_t pa
pr_err("%s: Invalid irq type: %u\n", __func__, irq.type);
ret = -1;
}
}
return ret;
}