Enable NUMA for SGX EPC sections · Pull Request !329 · openEuler/qemu

This PR is to enable NUMA support for SGX EPC sections in Qemu-6.2.0.

### Upstream commit link

https://lore.kernel.org/all/20211101162009.62161-2-yang.zhong@intel.com/
https://lore.kernel.org/all/20211101162009.62161-4-yang.zhong@intel.com/
https://lore.kernel.org/all/20211101162009.62161-5-yang.zhong@intel.com/
https://lore.kernel.org/all/20220120223104.437161-1-yang.zhong@intel.com/

### Test

After enable host SGX support, using following Qemu command line options:

```
    -machine q35 \                                                                                                                                                                                        
    -accel kvm \                                                                                                                                                                                          
    -m 4G,maxmem=20G \                                                                                                                                                                                    
    -smp sockets=2,cores=2 \                                                                                                                                                                              
    -cpu host,+sgx-provisionkey \                                                                                                                                                                         
    \                                                                                                                                                                                                    
    -object memory-backend-ram,size=2G,host-nodes=0,policy=bind,id=node0 \                                                                                                                                
    -object memory-backend-epc,id=mem0,size=64M,prealloc=on,host-nodes=0,policy=bind \                                                                                                                    
    -numa node,nodeid=0,cpus=0-1,memdev=node0 \                                                                                                                                                           
    -object memory-backend-ram,size=2G,host-nodes=1,policy=bind,id=node1 \                                                                                                                                
    -object memory-backend-epc,id=mem1,size=28M,prealloc=on,host-nodes=1,policy=bind \                                                                                                                    
    -numa node,nodeid=1,cpus=2-3,memdev=node1 \                                                                                                                                                           
    -M sgx-epc.0.memdev=mem0,sgx-epc.0.node=0,sgx-epc.1.memdev=mem1,sgx-epc.1.node=1 \
```
Then we get following from VM:

```
    [root@localhost ~]# dmesg|grep sgx
    [    0.335398] sgx: EPC section 0x180000000-0x183ffffff
    [    0.335942] sgx: EPC section 0x184000000-0x185bfffff
    [root@localhost ~]# dmesg | grep SRAT
    [    0.016298] ACPI: SRAT 0x000000007FB76000 000160 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
    [    0.016308] ACPI: Reserving SRAT table memory at [mem 0x7fb76000-0x7fb7615f]
    [    0.016355] SRAT: PXM 0 -> APIC 0x00 -> Node 0
    [    0.016357] SRAT: PXM 0 -> APIC 0x01 -> Node 0
    [    0.016357] SRAT: PXM 1 -> APIC 0x02 -> Node 1
    [    0.016358] SRAT: PXM 1 -> APIC 0x03 -> Node 1
    [    0.016359] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
    [    0.016361] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0x7fffffff]
    [    0.016362] ACPI: SRAT: Node 1 PXM 1 [mem 0x100000000-0x17fffffff]
    [    0.016363] ACPI: SRAT: Node 1 PXM 1 [mem 0x184000000-0x185bfffff]
    [    0.016364] ACPI: SRAT: Node 0 PXM 0 [mem 0x180000000-0x183ffffff]
    [    0.016364] ACPI: SRAT: Node 1 PXM 1 [mem 0x1c0000000-0x5bfffffff] hotplug    
```

And from Qemu monitor and QMP, we get:

```
    (qemu) info sgx
    SGX support: enabled
    SGX1 support: enabled
    SGX2 support: enabled
    FLC support: enabled
    size: 96468992
    NUMA node #1: size=29360128
    NUMA node #0: size=67108864
    
    {'execute':'qmp_capabilities'}
    qmp_cmd_name: qmp_capabilities, arguments: {}
    {"return": {}}
    {'execute':'query-sgx'}
    qmp_cmd_name: query-sgx, arguments: {}
    {"return": {"sgx": true, "sgx2": true, "sgx1": true, "sections": [{"size": 29360128, "node": 1}, {"size": 67108864, "node": 0}], "section-size": 96468992, "flc": true}}
    {'execute':'query-sgx-capabilities'}
    qmp_cmd_name: query-sgx-capabilities, arguments: {}
    {"return": {"sgx": true, "sgx2": true, "sgx1": true, "sections": [{"size": 229109760, "node": 0}, {"size": 266862592, "node": 1}, {"size": 266862592, "node": 2}, {"size": 266862592, "node": 3}], "section-size": 1029697536, "flc": true}}
    
```

### Known Issue
N/A

### Default Config Change
N/A

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