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KVM: PPC: Add PV guest critical sections
authorAlexander Graf <agraf@suse.de>
Thu, 29 Jul 2010 12:47:49 +0000 (14:47 +0200)
committerAvi Kivity <avi@redhat.com>
Sun, 24 Oct 2010 08:50:46 +0000 (10:50 +0200)
commit5c6cedf488a1144ac4f683f3ea1a642533d1dcd2
tree658f90bfde8dfef9c53675d5b114d9761869822ctree | snapshot (tar.gz zip)
parent2a342ed57756ad5d8af5456959433884367e5ab2commit | diff
KVM: PPC: Add PV guest critical sections

When running in hooked code we need a way to disable interrupts without
clobbering any interrupts or exiting out to the hypervisor.

To achieve this, we have an additional critical field in the shared page. If
that field is equal to the r1 register of the guest, it tells the hypervisor
that we're in such a critical section and thus may not receive any interrupts.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/powerpc/include/asm/kvm_para.h diff | blob | blame | history
arch/powerpc/kvm/book3s.c diff | blob | blame | history
arch/powerpc/kvm/booke.c diff | blob | blame | history