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| author | Dominik Dingel | 2014-03-25 13:47:11 +0100 |
|---|---|---|
| committer | Christian Borntraeger | 2014-04-22 13:24:13 +0200 |
| commit | b31605c12f4edda7a40ad9f86985739666298c31 (patch) | |
| tree | 6dbda314904aeef619702812f7b6aab836459dde /arch/s390/include | |
| parent | KVM: s390: Per-vm kvm device controls (diff) | |
| download | kernel-qcow2-linux-b31605c12f4edda7a40ad9f86985739666298c31.tar.gz kernel-qcow2-linux-b31605c12f4edda7a40ad9f86985739666298c31.tar.xz kernel-qcow2-linux-b31605c12f4edda7a40ad9f86985739666298c31.zip | |
KVM: s390: make cmma usage conditionally
When userspace reset the guest without notifying kvm, the CMMA state
of the pages might be unused, resulting in guest data corruption.
To avoid this, CMMA must be enabled only if userspace understands
the implications.
CMMA must be enabled before vCPU creation. It can't be switched off
once enabled. All subsequently created vCPUs will be enabled for
CMMA according to the CMMA state of the VM.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[remove now unnecessary calls to page_table_reset_pgste]
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index a993b6f3429f..b61ac418b510 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -288,6 +288,7 @@ struct kvm_arch{ struct gmap *gmap; int css_support; int use_irqchip; + int use_cmma; struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS]; }; |