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doc: Add the SGX numa description

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Add the SGX numa reference command and how to check if
SGX numa is support or not with multiple EPC sections.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20211101162009.62161-5-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Yang Zhong 2021-11-01 12:20:08 -04:00 committed by Paolo Bonzini
parent 4755927ae1
commit d1889b3609
1 changed files with 27 additions and 4 deletions
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31
docs/system/i386/sgx.rst
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@ -141,8 +141,7 @@ To launch a SGX guest:
|qemu_system_x86| \\
-cpu host,+sgx-provisionkey \\
-object memory-backend-epc,id=mem1,size=64M,prealloc=on \\
-object memory-backend-epc,id=mem2,size=28M \\
-M sgx-epc.0.memdev=mem1,sgx-epc.1.memdev=mem2
-M sgx-epc.0.memdev=mem1,sgx-epc.0.node=0
Utilizing SGX in the guest requires a kernel/OS with SGX support.
The support can be determined in guest by::
@ -152,8 +151,32 @@ The support can be determined in guest by::
and SGX epc info by::
$ dmesg | grep sgx
[ 1.242142] sgx: EPC section 0x180000000-0x181bfffff
[ 1.242319] sgx: EPC section 0x181c00000-0x1837fffff
[ 0.182807] sgx: EPC section 0x140000000-0x143ffffff
[ 0.183695] sgx: [Firmware Bug]: Unable to map EPC section to online node. Fallback to the NUMA node 0.
To launch a SGX numa guest:
.. parsed-literal::
|qemu_system_x86| \\
-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
and SGX epc numa info by::
$ dmesg | grep sgx
[ 0.369937] sgx: EPC section 0x180000000-0x183ffffff
[ 0.370259] sgx: EPC section 0x184000000-0x185bfffff
$ dmesg | grep SRAT
[ 0.009981] ACPI: SRAT: Node 0 PXM 0 [mem 0x180000000-0x183ffffff]
[ 0.009982] ACPI: SRAT: Node 1 PXM 1 [mem 0x184000000-0x185bfffff]
References
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