Azure: Update TDX with HCL support
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux-azure (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
| Lunar |
In Progress
|
Medium
|
Tim Gardner | ||
Bug Description
SRU Justification
[Impact]
Microsoft has asked for the addition of 2 patches for TDX and SNP-SEV VM support with HCL.
The refreshed patches will fix 2 bugs for future Hyper-V versions:
1) PCI DDA for Linux TDX VMs with HCL is not working due to a guest bug and a host bug. The guest bug is fixed in the mainline version of the TDX patches.
2) On a recent Hyper-V dev build that advertises the Hyper-V TLB flushing hypercalls, the current Ubuntu 6.2 kernel passes a shared input page to the Hyper-V while it should pass a private input page; as a result, the hypercall always fails and Linux now falls back to the legacy native method of flusing TLB. This slows down the flush-TLB operation . The mainline version doesn't have the bug.
[Test Plan]
Microsoft tested.
[Regression Potential]
Azure instances with TDX on HCL hypervisors may not work correctly.
[Other Info]
SF: #00364214
| Tim Gardner (timg-tpi) wrote | #1 |
| affects: | linux (Ubuntu) → linux-azure (Ubuntu) |
| Changed in linux-azure (Ubuntu Lunar): | |
| assignee: | nobody → Tim Gardner (timg-tpi) |
| importance: | Undecided → Medium |
| status: | New → In Progress |
| Changed in linux-azure (Ubuntu): | |
| status: | New → Invalid |
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