lkml.org 
[lkml]   [2018]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH RFC 0/2] KVM: s390: vsie: support VCPU requests
Date
While discussing AP changes, we discovered that we will have to force
a CPU using the vSIE to regenerate/reload shadow data structures. For now,
we have no mechanism for that.

E.g. when clearing AP masks later, we could still have a vSIE CPU making
use of AP adapters as the masks might not be considered yet in the vSIE
data structures. We need a way to block entering the vSIE and regenerate
all shadow data structures once done.

Looks like we can achieve that by simply simulating an ordinary SIE
entry/exit in the VCPU sie control block (while entering the vSIE loop).

This way, we can support blocking and also synchronous CPU requests.

Only compile tested.

David Hildenbrand (2):
KVM: s390: vsie: simulate VCPU SIE entry/exit
KVM: s390: introduce and use KVM_REQ_VSIE_RESTART

arch/s390/include/asm/kvm_host.h | 1 +
arch/s390/kvm/kvm-s390.c | 16 ++++++++++++++--
arch/s390/kvm/kvm-s390.h | 1 +
arch/s390/kvm/vsie.c | 20 ++++++++++++++++++--
4 files changed, 34 insertions(+), 4 deletions(-)

--
2.17.1

\
 
 \ /
  Last update: 2018-08-07 14:52    [W:0.067 / U:0.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site