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SEV-SNP support relies on a different set of properties/state than the
existing 'sev-guest' object. This patch introduces the 'sev-snp-guest'
object, which can be used to configure an SEV-SNP guest. For example,
a default-configured SEV-SNP guest with no additional information
passed in for use with attestation:
-object sev-snp-guest,id=sev0
or a fully-specified SEV-SNP guest where all spec-defined binary
blobs are passed in as base64-encoded strings:
-object sev-snp-guest,id=sev0, \
policy=0x30000, \
init-flags=0, \
id-block=YWFhYWFhYWFhYWFhYWFhCg==, \
id-auth=CxHK/OKLkXGn/KpAC7Wl1FSiisWDbGTEKz..., \
auth-key-enabled=on, \
host-data=LNkCWBRC5CcdGXirbNUV1OrsR28s..., \
guest-visible-workarounds=AA==, \
See the QAPI schema updates included in this patch for more usage
details.
In some cases these blobs may be up to 4096 characters, but this is
generally well below the default limit for linux hosts where
command-line sizes are defined by the sysconf-configurable ARG_MAX
value, which defaults to 2097152 characters for Ubuntu hosts, for
example.
Co-developed-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
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Update the amd-memory-encryption.txt file with information about SEV-ES,
including how to launch an SEV-ES guest and some of the differences
between SEV and SEV-ES guests in regards to launching and measuring the
guest.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Message-Id: <fa1825a5eb0290eac4712cde75ba4c6829946eac.1619208498.git.thomas.lendacky@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Fix some spelling and grammar mistakes in the amd-memory-encryption.txt
file. No new information added.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Message-Id: <a7c5ee6c056d840f46028f4a817c16a9862bdd9e.1619208498.git.thomas.lendacky@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Now that we've implemented a generic machine option for configuring various
confidential guest support mechanisms:
1. Update docs/amd-memory-encryption.txt to reference this rather than
the earlier SEV specific option
2. Add a docs/confidential-guest-support.txt to cover the generalities of
the confidential guest support scheme
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
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Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200807101736.3544506-1-hhan@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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Signed-off-by: Like Xu <like.xu@linux.intel.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1550640446-18788-1-git-send-email-like.xu@linux.intel.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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Add a new memory encryption object 'sev-guest'. The object will be used
to create encrypted VMs on AMD EPYC CPU. The object provides the properties
to pass guest owner's public Diffie-hellman key, guest policy and session
information required to create the memory encryption context within the
SEV firmware.
e.g to launch SEV guest
# $QEMU \
-object sev-guest,id=sev0 \
-machine ....,memory-encryption=sev0
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Create a documentation entry to describe the AMD Secure Encrypted
Virtualization (SEV) feature.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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