Re: [PATCH 1/6] numa: Enable numa for SGX EPC sections

[Eric Blake]

On Mon, Oct 11, 2021 at 07:15:49PM +0800, Yang Zhong wrote:
> The basic SGX did not enable numa for SGX EPC sections, which
> result in all EPC sections located in numa node 0. This patch
> enable SGX numa function in the guest and the EPC section can
> work with RAM as one numa node.
> 
> The Guest kernel related log:
> [    0.009981] ACPI: SRAT: Node 0 PXM 0 [mem 0x180000000-0x183ffffff]
> [    0.009982] ACPI: SRAT: Node 1 PXM 1 [mem 0x184000000-0x185bfffff]
> The SRAT table can normally show SGX EPC sections menory info in different
> numa nodes.
> 
> The SGX EPC numa related command:
>  ......
>  -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 
> \
>  ......
> 
> Signed-off-by: Yang Zhong <yang.zhong@intel.com>
> ---
>  qapi/machine.json         |  6 +++++-
>  include/hw/i386/sgx-epc.h |  3 +++
>  hw/i386/acpi-build.c      |  4 ++++
>  hw/i386/sgx-epc.c         |  3 +++
>  hw/i386/sgx.c             | 44 +++++++++++++++++++++++++++++++++++++++
>  monitor/hmp-cmds.c        |  1 +
>  qemu-options.hx           |  4 ++--
>  7 files changed, 62 insertions(+), 3 deletions(-)
> 
> diff --git a/qapi/machine.json b/qapi/machine.json
> index 5db54df298..09b6188e6f 100644
> --- a/qapi/machine.json
> +++ b/qapi/machine.json
> @@ -1213,6 +1213,7 @@
>    'data': { '*id': 'str',
>              'memaddr': 'size',
>              'size': 'size',
> +            'node': 'int',
>              'memdev': 'str'
>            }
>  }
> @@ -1288,7 +1289,10 @@
>  # Since: 6.2
>  ##
>  { 'struct': 'SgxEPC',
> -  'data': { 'memdev': 'str' } }
> +  'data': { 'memdev': 'str',
> +            'node': 'int'
> +          }
> +}

Missing documentation of the new member.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org