** Changed in: linux-azure (Ubuntu Lunar)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2042096
Title:
Azure: Update TDX with HCL support
Status in linux-azure package in Ubuntu:
Invalid
Status in linux-azure source package in Lunar:
Fix Committed
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
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