Messages in this thread | | | Subject | Re: [PATCH v9 05/22] KVM: s390: vsie: simulate VCPU SIE entry/exit | From | Tony Krowiak <> | Date | Tue, 14 Aug 2018 08:46:40 -0400 |
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On 08/14/2018 04:50 AM, Cornelia Huck wrote: > On Mon, 13 Aug 2018 17:48:02 -0400 > Tony Krowiak <akrowiak@linux.vnet.ibm.com> wrote: > >> From: David Hildenbrand <david@redhat.com> >> >> VCPU requests and VCPU blocking right now don't take care of the vSIE >> (as it was not necessary until now). But we want to have VCPU requests >> that will also be handled before running the vSIE again. >> >> So let's simulate a SIE entry when entering the vSIE loop and check >> for PROG_ flags. The existing infrastructure (e.g. exit_sie()) will then >> detect that the SIE (in form of the vSIE execution loop) is running and >> properly kick the vSIE CPU, resulting in it leaving the vSIE loop and >> therefore the vSIE interception handler, allowing it to handle VCPU >> requests. >> >> E.g. if we want to modify the crycb of the VCPU and make sure that any >> masks also get applied to the VSIE crycb shadow (which uses masks from the >> VCPU crycb), we will need a way to hinder the vSIE from running and make >> sure to process the updated crycb before reentering the vSIE again. >> >> Signed-off-by: David Hildenbrand <david@redhat.com> >> Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com> >> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> >> --- >> arch/s390/kvm/kvm-s390.c | 9 ++++++++- >> arch/s390/kvm/kvm-s390.h | 1 + >> arch/s390/kvm/vsie.c | 20 ++++++++++++++++++-- >> 3 files changed, 27 insertions(+), 3 deletions(-) > I think that is the RFC version of David's patch, not the v1? Again, > not really relevant for reviewing, but I hope that you test the final > version.
Will do.
>
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