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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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29
hypervisor/include/public/acrn_hv_defs.h
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@@ -319,8 +319,11 @@ struct hc_platform_info {
/** Physical CPU number */
uint16_t cpu_num;
/** version of this structure */
uint16_t version;
/** Align the size of version & hardware info to 128Bytes. */
uint8_t reserved0[126];
uint8_t reserved0[124];
/** Configuration Information */
/** Maximum vCPU number for one VM. */
@@ -329,8 +332,30 @@ struct hc_platform_info {
/** Maximum Kata container number in SOS VM */
uint8_t max_kata_containers;
uint8_t reserved1[7];
/** Number of configured VMs */
uint16_t max_vms;
/**
* The size of acrn_vm_config is various on different platforms.
* This is the size of this struct which is used by the caller
* to parse the vm_configs array.
*/
uint32_t vm_config_entry_size;
/**
* Address to an array of struct acrn_vm_config, containing all
* the configurations of all VMs. VHM treats it as an opague data
* structure.
*
* The size of one array element is vm_config_entry_size while
* the number of elements is max_vms.
*/
uint64_t vm_configs_addr;
/** Align the size of Configuration info to 128Bytes. */
uint8_t reserved1[125];
uint8_t reserved2[104];
} __aligned(8);
/**