ACK: [PATCH 0/5][jammy/linux-azure] SGX fixes for 5.15 Azure tuned kernel

[Bartlomiej Zolnierkiewicz]

Acked-by: Bartlomiej Zolnierkiewicz <bartlomiej.zolnierkiewicz at canonical.com>

On Wed, Jun 22, 2022 at 4:26 PM Tim Gardner <tim.gardner at canonical.com> wrote:
>
> BugLink: https://bugs.launchpad.net/bugs/1979541
>
> SRU Justification
>
> [Impact]
>
> https://lore.kernel.org/linux-sgx/dd7c1402-eeb9-cea5-25c6-ab19e8031991@intel.com/T/ = This
> fix introduced a bug and fixed and reverted by series added to 5.19
> (https://lore.kernel.org/linux-sgx/cover.1652389823.git.reinette.chatre@intel.com/)
>
> Backport several SGX fixes.
>
> x86/sgx: Ensure no data in PCMD page after truncate
> x86/sgx: Fix race between reclaimer and page fault handler
> x86/sgx: Obtain backing storage page with enclave mutex held
> x86/sgx: Mark PCMD page as dirty when modifying contents
> x86/sgx: Disconnect backing page references from dirty status
>
> [Test Plan]
>
> Microsoft tested, "Update from engineer - I was unable to reproduce the softlock issue after the patches were installed"
>
> [Where things could go wrong]
>
> These patches could cause a different soft lockup.
>
> [Other Info]
>
> SF: #00338537