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TDX guest driver exposes IOCTL interfaces to service TDX guest user-specific requests. Currently, it is only used to allow the user to get the TDREPORT to support TDX attestation. Details about the TDX attestation process are documented in Documentation/x86/tdx.rst, and the IOCTL details are documented in Documentation/virt/coco/tdx-guest.rst. Operations like getting TDREPORT involves sending a blob of data as input and getting another blob of data as output. It was considered to use a sysfs interface for this, but it doesn't fit well into the standard sysfs model for configuring values. It would be possible to do read/write on files, but it would need multiple file descriptors, which would be somewhat messy. IOCTLs seem to be the best fitting and simplest model for this use case. The AMD sev-guest driver also uses the IOCTL interface to support attestation. [Bagas Sanjaya: Ack is for documentation portion] Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Kai Huang <kai.huang@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Wander Lairson Costa <wander@redhat.com> Link: https://lore.kernel.org/all/20221116223820.819090-3-sathyanarayanan.kuppuswamy%40linux.intel.com
58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Virtualization support drivers
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#
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menuconfig VIRT_DRIVERS
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bool "Virtualization drivers"
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help
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Say Y here to get to see options for device drivers that support
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virtualization environments.
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If you say N, all options in this submenu will be skipped and disabled.
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if VIRT_DRIVERS
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config VMGENID
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tristate "Virtual Machine Generation ID driver"
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default y
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depends on ACPI
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help
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Say Y here to use the hypervisor-provided Virtual Machine Generation ID
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to reseed the RNG when the VM is cloned. This is highly recommended if
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you intend to do any rollback / cloning / snapshotting of VMs.
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Prefer Y to M so that this protection is activated very early.
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config FSL_HV_MANAGER
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tristate "Freescale hypervisor management driver"
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depends on FSL_SOC
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select EPAPR_PARAVIRT
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help
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The Freescale hypervisor management driver provides several services
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to drivers and applications related to the Freescale hypervisor:
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1) An ioctl interface for querying and managing partitions.
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2) A file interface to reading incoming doorbells.
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3) An interrupt handler for shutting down the partition upon
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receiving the shutdown doorbell from a manager partition.
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4) A kernel interface for receiving callbacks when a managed
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partition shuts down.
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source "drivers/virt/vboxguest/Kconfig"
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source "drivers/virt/nitro_enclaves/Kconfig"
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source "drivers/virt/acrn/Kconfig"
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source "drivers/virt/coco/efi_secret/Kconfig"
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source "drivers/virt/coco/sev-guest/Kconfig"
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source "drivers/virt/coco/tdx-guest/Kconfig"
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endif
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