/** * enum cc_attr - Confidential computing attributes * * These attributes represent confidential computing features that are * currently active.
*/ enum cc_attr { /** * @CC_ATTR_MEM_ENCRYPT: Memory encryption is active * * The platform/OS is running with active memory encryption. This * includes running either as a bare-metal system or a hypervisor * and actively using memory encryption or as a guest/virtual machine * and actively using memory encryption. * * Examples include SME, SEV and SEV-ES.
*/
CC_ATTR_MEM_ENCRYPT,
/** * @CC_ATTR_HOST_MEM_ENCRYPT: Host memory encryption is active * * The platform/OS is running as a bare-metal system or a hypervisor * and actively using memory encryption. * * Examples include SME.
*/
CC_ATTR_HOST_MEM_ENCRYPT,
/** * @CC_ATTR_GUEST_MEM_ENCRYPT: Guest memory encryption is active * * The platform/OS is running as a guest/virtual machine and actively * using memory encryption. * * Examples include SEV and SEV-ES.
*/
CC_ATTR_GUEST_MEM_ENCRYPT,
/** * @CC_ATTR_GUEST_STATE_ENCRYPT: Guest state encryption is active * * The platform/OS is running as a guest/virtual machine and actively * using memory encryption and register state encryption. * * Examples include SEV-ES.
*/
CC_ATTR_GUEST_STATE_ENCRYPT,
/** * @CC_ATTR_GUEST_UNROLL_STRING_IO: String I/O is implemented with * IN/OUT instructions * * The platform/OS is running as a guest/virtual machine and uses * IN/OUT instructions in place of string I/O. * * Examples include TDX guest & SEV.
*/
CC_ATTR_GUEST_UNROLL_STRING_IO,
/** * @CC_ATTR_SEV_SNP: Guest SNP is active. * * The platform/OS is running as a guest/virtual machine and actively * using AMD SEV-SNP features.
*/
CC_ATTR_GUEST_SEV_SNP,
/** * @CC_ATTR_GUEST_SNP_SECURE_TSC: SNP Secure TSC is active. * * The platform/OS is running as a guest/virtual machine and actively * using AMD SEV-SNP Secure TSC feature.
*/
CC_ATTR_GUEST_SNP_SECURE_TSC,
/** * @CC_ATTR_HOST_SEV_SNP: AMD SNP enabled on the host. * * The host kernel is running with the necessary features * enabled to run SEV-SNP guests.
*/
CC_ATTR_HOST_SEV_SNP,
};
#ifdef CONFIG_ARCH_HAS_CC_PLATFORM
/** * cc_platform_has() - Checks if the specified cc_attr attribute is active * @attr: Confidential computing attribute to check * * The cc_platform_has() function will return an indicator as to whether the * specified Confidential Computing attribute is currently active. * * Context: Any context * Return: * * TRUE - Specified Confidential Computing attribute is active * * FALSE - Specified Confidential Computing attribute is not active
*/ bool cc_platform_has(enum cc_attr attr); void cc_platform_set(enum cc_attr attr); void cc_platform_clear(enum cc_attr attr);
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