Add a workaround to Linux 6.1's sev-guest lockout #41
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The IV reuse fix 47894e0fa6a5 works against the host's throttling by making the sev-guest device useless when throttled. The x86/urgent fix 72f7754dcf31 that merged to tip on March 16 still hasn't made it to some distros, so this workaround is still needed temporarily. Issue google#40 is to revert this change at the appropriate time. The same fix for google#40 includes the fix for google#5. Signed-off-by: Dionna Glaze <[email protected]>
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SLES-15 still doesn't have the required patches, so we should merge this for a better user experience. |
kongoshuu
approved these changes
May 2, 2023
| const ( | ||
| // defaultSevGuestDevicePath is the platform's usual device path to the SEV guest. | ||
| defaultSevGuestDevicePath = "/dev/sev-guest" | ||
| throttleDuration = 2 * time.Second |
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Maybe a comment on how the 2 second throttleDuration was picked?
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The IV reuse fix 47894e0fa6a5 works against the host's throttling by making the sev-guest device useless when throttled. The x86/urgent fix 72f7754dcf31 that merged to tip on March 16 still hasn't made it to some distros, so this workaround is still needed temporarily.
Issue #40 is to revert this change at the appropriate time. The same fix for #40 includes the fix for #5.