On Fri, May 24, 2024 at 02:21:23PM +0800, Zhenzhong Duan wrote:
> Add element "quoteGenerationService" to tdx launch security type.
> Currently it contains only one sub-element "SocketAddress".
>
> "SocketAddress" is modelized according to QEMU QAPI, supporting
> inet, unix, vsock and fd type and variant attributes depending
> on type.
>
> XML example:
>
> <launchSecurity type='tdx'>
> <policy>0x0</policy>
> <mrConfigId>xxx</mrConfigId>
> <mrOwner>xxx</mrOwner>
> <mrOwnerConfig>xxx</mrOwnerConfig>
> <quoteGenerationService>
> <SocketAddress type='vsock' cid='xxx' port='xxx'/>
> </quoteGenerationService>
> </launchSecurity>
>
> QEMU command line example:
> qemu-system-x86_64 \
> -object
> '{"qom-type":"tdx-guest","id":"lsec0","sept-ve-disable":false,"mrconfigid":"xxx","mrowner":"xxx","mrownerconfig":"xxx","quote-generation-socket":{"type":"vsock","cid":"xxx","port":"xxx"}}'
> \
> -machine pc-q35-6.0,confidential-guest-support=lsec0
>
> Signed-off-by: Zhenzhong Duan <[email protected]>
> ---
> src/conf/domain_conf.c | 272 +++++++++++++++++++++++++++++-
> src/conf/domain_conf.h | 61 +++++++
> src/conf/schemas/domaincommon.rng | 106 ++++++++++++
> src/qemu/qemu_command.c | 106 ++++++++++++
> 4 files changed, 544 insertions(+), 1 deletion(-)
> diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
> index bb4973fce8..15cdb3e0e6 100644
> --- a/src/conf/domain_conf.h
> +++ b/src/conf/domain_conf.h
> @@ -2852,6 +2852,55 @@ struct _virDomainKeyWrapDef {
> virTristateSwitch dea;
> };
>
> +typedef enum {
> + VIR_DOMAIN_SOCKET_ADDRESS_NONE,
> + VIR_DOMAIN_SOCKET_ADDRESS_INET,
> + VIR_DOMAIN_SOCKET_ADDRESS_UNIX,
> + VIR_DOMAIN_SOCKET_ADDRESS_VSOCK,
> + VIR_DOMAIN_SOCKET_ADDRESS_FD,
> +
> + VIR_DOMAIN_SOCKET_ADDRESS_LAST
> +} virDomainSocketAddress;
> +
> +typedef struct _InetSocketAddress InetSocketAddress;
> +typedef struct _UnixSocketAddress UnixSocketAddress;
> +typedef struct _VsockSocketAddress VsockSocketAddress;
> +typedef struct _FdSocketAddress FdSocketAddress;
> +
> +struct _InetSocketAddress {
> + char *host;
> + char *port;
> + bool has_numeric;
> + virTristateBool numeric;
> + bool has_to;
> + unsigned int to;
> + bool has_ipv4;
> + virTristateBool ipv4;
> + bool has_ipv6;
> + virTristateBool ipv6;
> + bool has_keep_alive;
> + virTristateBool keep_alive;
> + bool has_mptcp;
> + virTristateBool mptcp;
> +};
> +
> +struct _UnixSocketAddress {
> + char *path;
> + bool has_abstract;
> + virTristateBool abstract;
> + bool has_tight;
> + virTristateBool tight;
> +};
> +
> +struct _VsockSocketAddress {
> + char *cid;
> + char *port;
> +};
> +
> +struct _FdSocketAddress {
> + char *str;
> +};
> +
> typedef enum {
> VIR_DOMAIN_LAUNCH_SECURITY_NONE,
> VIR_DOMAIN_LAUNCH_SECURITY_SEV,
> @@ -2873,11 +2922,22 @@ struct _virDomainSEVDef {
> virTristateBool kernel_hashes;
> };
>
> +typedef struct SocketAddress {
> + virDomainSocketAddress type;
> + union {
> + InetSocketAddress inet;
> + UnixSocketAddress Unix;
> + VsockSocketAddress vsock;
> + FdSocketAddress fd;
The 'fd' socket type does not make sense to expose
in libvirt XML. FD passing is something handled
privately between libvirt & QEMU, not a end user
choice.
Going further I don't think InetSocketAddress
makes sense to expose, as QGS has no ability
to listen on IP sockets. It can only do UNIX
sockets or VSock AFAICT. Even vsock looks like
a remnant of the old way of doing attestation
before it was integrated into Linux via sysfs
with the kernel making a call into QEMU.
IOW, AFAICT, for QGS all we actually need is
the ability to set a UNIX socket path in libvirt.
eg
<quoteGenerationService path="/var/run/tdx-qgs/qgs.socket"/>
and probably libvirt should allow 'path' to be optional
so an app can just do
<quoteGenerationService/>
and libvirt would fill in the default path which QGS listens
on out of the box....
With regards,
Daniel
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