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When running Linux inside a Nitro Enclave, the hypervisor provides a special virtio device called "Nitro Security Module" (NSM). This device has 3 main functions: 1) Provide attestation reports 2) Modify PCR state 3) Provide entropy This patch adds a driver for NSM that exposes a /dev/nsm device node which user space can issue an ioctl on this device with raw NSM CBOR formatted commands to request attestation documents, influence PCR states, read entropy and enumerate status of the device. In addition, the driver implements a hwrng backend. Originally-by: Petre Eftime <petre.eftime@gmail.com> Signed-off-by: Alexander Graf <graf@amazon.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20231011213522.51781-1-graf@amazon.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| Kbuild | ||