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Add CPU feature detection for Secure Encrypted Virtualization with Secure Nested Paging. This feature adds a strong memory integrity protection to help prevent malicious hypervisor-based attacks like data replay, memory re-mapping, and more. Since enabling the SNP CPU feature imposes a number of additional requirements on host initialization and handling legacy firmware APIs for SEV/SEV-ES guests, only introduce the CPU feature bit so that the relevant handling can be added, but leave it disabled via a disabled-features mask. Once all the necessary changes needed to maintain legacy SEV/SEV-ES support are introduced in subsequent patches, the SNP feature bit will be unmasked/enabled. Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Jarkko Sakkinen <jarkko@profian.com> Signed-off-by: Ashish Kalra <Ashish.Kalra@amd.com> Signed-off-by: Michael Roth <michael.roth@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20240126041126.1927228-2-michael.roth@amd.com |
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| .. | ||
| accounting | ||
| arch | ||
| bootconfig | ||
| bpf | ||
| build | ||
| certs | ||
| cgroup | ||
| counter | ||
| crypto | ||
| debugging | ||
| edid | ||
| firewire | ||
| firmware | ||
| gpio | ||
| hv | ||
| iio | ||
| include | ||
| kvm/kvm_stat | ||
| laptop | ||
| leds | ||
| lib | ||
| memory-model | ||
| mm | ||
| net/ynl | ||
| objtool | ||
| pci | ||
| pcmcia | ||
| perf | ||
| power | ||
| rcu | ||
| scripts | ||
| spi | ||
| testing | ||
| thermal | ||
| time | ||
| tracing | ||
| usb | ||
| verification | ||
| virtio | ||
| wmi | ||
| workqueue | ||
| Makefile | ||