APPLIED/Cmnt: [SRU][n:linux-azure][PATCH 0/1] Kernel fails to enable XSAVE when running in a “v5” AMD SEV-SNP VM

[John Cabaj]

On 6/12/24 3:27 PM, John Cabaj wrote:
> BugLink: https://bugs.launchpad.net/bugs/2069204
> 
> SRU Justification
> 
> [Impact]
> 
> * Request from MSFT to include patch to disable CET Shadow Stack on SEV-SNP. Due to CPUID emulation bug not being fixed in VMs until October 2024, this feature is being disabled in the interim.
> 
> [Fix]
> 
> * Clean cherry-pick SAUCE patch from MSFT tree, https://github.com/dcui/linux
> * cdf5cdd: "x86/hyperv: temporarily disable CET SS on SEV-SNP due to a paravisor bug"
> 
> [Test Plan]
> 
> * Compile tested
> * Boot tested
> * Microsoft tested
> 
> [Regression potential]
> 
> * Changes isolated, minimal regression risk
> 
> [Other info]
> 
> * SF #00387447
> 
> Dexuan Cui (1):
>   UBUNTU: SAUCE: x86/hyperv: temporarily disable CET SS on SEV-SNP due
>     to a paravisor bug
> 
>  arch/x86/kernel/cpu/mshyperv.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 

Applied to noble:linux-azure master-next branch.

Also applied to oracular:linux-azure master-next branch cleanly, though it was missed in the initial patch request.


Thanks,
John