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hv: provide vm_config information in get_platform_info hypercall

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Hypervisor reports VM configuration information to SOS which can be used to
dynamically allocate VCPU affinity.

Servise OS can get the vm_configs in this order:

1. call platform_info HC (set vm_configs_addr with 0) to get max_vms and
   vm_config_entry_size.
2. allocate memory for acrn_vm_config array based on the number of VMs
   and entry size that just got in step 1.
3. call platform_info HC again to collect VM configurations.

Tracked-On: #4616
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Zide Chen
2020-03-23 14:03:51 -07:00
committed by wenlingz
parent b9583f42e9
commit 5420b34a26
2 changed files with 50 additions and 7 deletions
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28
hypervisor/common/hypercall.c
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@@ -108,13 +108,31 @@ int32_t hcall_get_api_version(struct acrn_vm *vm, uint64_t param)
*/
int32_t hcall_get_platform_info(struct acrn_vm *vm, uint64_t param)
{
struct hc_platform_info platform_info;
struct hc_platform_info pi = { 0 };
uint32_t entry_size = sizeof(struct acrn_vm_config);
int32_t ret;
platform_info.cpu_num = get_pcpu_nums();
platform_info.max_vcpus_per_vm = MAX_VCPUS_PER_VM;
platform_info.max_kata_containers = CONFIG_MAX_KATA_VM_NUM;
/* to get the vm_config_info pointer */
ret = copy_from_gpa(vm, &pi, param, sizeof(pi));
if (ret == 0) {
pi.cpu_num = get_pcpu_nums();
pi.version = 0x100; /* version 1.0; byte[1:0] = major:minor version */
pi.max_vcpus_per_vm = MAX_VCPUS_PER_VM;
pi.max_kata_containers = CONFIG_MAX_KATA_VM_NUM;
pi.max_vms = CONFIG_MAX_VM_NUM;
pi.vm_config_entry_size = entry_size;
return copy_to_gpa(vm, &platform_info, param, sizeof(platform_info));
/* If it wants to get the vm_configs info */
if (pi.vm_configs_addr != 0UL) {
ret = copy_to_gpa(vm, (void *)get_vm_config(0U), pi.vm_configs_addr, entry_size * pi.max_vms);
}
if (ret == 0) {
ret = copy_to_gpa(vm, &pi, param, sizeof(pi));
}
}
return ret;
}
/**