When an SEV guest is started, the reset vector and state are
extracted from metadata that is contained in the firmware volume.
In preparation for using IGVM to setup the initial CPU state,
the code has been refactored to populate vmcb_save_area for each
CPU which is then applied during guest start
IGVM files can contain an initial VMSA that should be applied to each
vcpu as part of the initial guest state. The sev_features flags are
provided as part of the VMSA structure. However, KVM only allows
sev_features to be set during initialization and not as the guest is
being prepared for launch.
Adds an IGVM loader to QEMU which processes a given IGVM file and
applies the directives within the file to the current guest
configuration.
The IGVM loader can be used to configure both confidential and
non-confidential guests. For confidential guests, the
ConfidentialGuestSupport object for the
An IGVM file contains configuration of guest state that should be
applied during configuration of the guest, before the guest is started.
This patch allows the user to add an igvm-cfg object to an X86 machine
configuration that allows an IGVM file to be configured that will be
applied to the guest
Adds a handler for the guest policy initialization IGVM section and
builds an SEV policy based on this information and the ID block
directive if present. The policy is applied using by calling
'set_guest_policy()' on the ConfidentialGuestSupport object.
Signed-off-by: Roy Hopkins
Acked-by: Michae
The initialization sections in IGVM files contain configuration that
should be applied to the guest platform before it is started. This
includes guest policy and other information that can affect the security
level and the startup measurement of a guest.
This commit introduces handling of the init
The x86 segment registers are identified by the X86Seg enumeration which
includes LDTR and TR as well as the normal segment registers. The
function 'cpu_x86_load_seg_cache()' uses the enum to determine which
segment to set. However, specifying R_LDTR or R_TR results in an
out-of-bounds access of th
Create an enum entry within FirmwareDevice for 'igvm' to describe that
an IGVM file can be used to map firmware into memory as an alternative
to pre-existing firmware devices.
Signed-off-by: Roy Hopkins
Acked-by: Michael S. Tsirkin
---
docs/interop/firmware.json | 30 +++
The IGVM library allows Independent Guest Virtual Machine files to be
parsed and processed. IGVM files are used to configure guest memory
layout, initial processor state and other configuration pertaining to
secure virtual machines.
This adds the --enable-igvm configure option, enabled by default,
