diff options
Diffstat (limited to 'arch/s390/include/asm/kvm_host.h')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 91796dd2a8ec..d61e64555938 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -20,6 +20,7 @@ #include <linux/kvm_types.h> #include <linux/kvm_host.h> #include <linux/kvm.h> +#include <linux/seqlock.h> #include <asm/debug.h> #include <asm/cpu.h> #include <asm/fpu/api.h> @@ -553,6 +554,13 @@ struct kvm_vcpu_arch { unsigned long pfault_select; unsigned long pfault_compare; bool cputm_enabled; + /* + * The seqcount protects updates to cputm_start and sie_block.cputm, + * this way we can have non-blocking reads with consistent values. + * Only the owning VCPU thread (vcpu->cpu) is allowed to change these + * values and to start/stop/enable/disable cpu timer accounting. + */ + seqcount_t cputm_seqcount; __u64 cputm_start; }; |