ACK: [J][PATCH 0/2][v3] KVM: Improve SIGP architectural compliance (LP: 1959735)

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 2/4/22 8:11 AM, frank.heimes at canonical.com wrote:
> BugLink: https://bugs.launchpad.net/bugs/1959735
> 
> Linux as a guest operating system often doesn't have as stringent requirements
> to architectural compliance as traditional operating systems that rely on it.
> Specifically, KVM implements the SIGP RESTART in a non-compliant way,
> as it reports a CPU state to be stopped after SIGP RESTART was issued,
> while it should report a busy condition until the CPU is really started.
> This feature covers the necessary fixes/improvements to KVM SIGP processing.
> 
> v2: fixed hash, cherry picked from linux (instead of linux-next), based on 5.15.0-20.20
> v3: changed order of cherry-picks
> 
> Eric Farman (2):
>    KVM: s390: Simplify SIGP Set Arch handling
>    KVM: s390: Add a routine for setting userspace CPU state
> 
>   arch/s390/kvm/kvm-s390.c |  6 +++---
>   arch/s390/kvm/kvm-s390.h |  9 +++++++++
>   arch/s390/kvm/sigp.c     | 14 +-------------
>   3 files changed, 13 insertions(+), 16 deletions(-)
> 

-- 
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Tim Gardner
Canonical, Inc