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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2013-05-17 14:41:36 +0200 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-05-21 10:55:24 +0200 |
| commit | 2c70fe4416d5f6d092b20ebf7d7654835e09c109 (patch) | |
| tree | 077a740810c4ed97629efa5e6fc598823f2af503 /arch/s390/kvm/kvm-s390.h | |
| parent | s390/kvm: Provide a way to prevent reentering SIE (diff) | |
| download | linux-2c70fe4416d5f6d092b20ebf7d7654835e09c109.tar.xz linux-2c70fe4416d5f6d092b20ebf7d7654835e09c109.zip | |
s390/kvm: Kick guests out of sie if prefix page host pte is touched
The guest prefix pages must be mapped writeable all the time
while SIE is running, otherwise the guest might see random
behaviour. (pinned at the pte level) Turns out that mlocking is
not enough, the page table entry (not the page) might change or
become r/o. This patch uses the gmap notifiers to kick guest
cpus out of SIE.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.h')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 7a8abfd26a0f..269b523d0f6e 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -63,6 +63,7 @@ static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) { vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u; vcpu->arch.sie_block->ihcpu = 0xffff; + kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); } static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu) |