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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2014-07-17 10:47:43 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-08-25 14:35:53 +0200
commitb028ee3edd54d338dd811aeafd670a2c682be558 (patch)
tree99ca4c746fbdff114f4e7a057620fc685036c92d /arch/s390/include/uapi/asm/kvm.h
parentc3950b66b9ceff1614db870d2d5a9bd47531a712 (diff)
downloadblackbird-op-linux-b028ee3edd54d338dd811aeafd670a2c682be558.tar.gz
blackbird-op-linux-b028ee3edd54d338dd811aeafd670a2c682be558.zip
KVM: s390: synchronize more registers with kvm_run
In order to reduce the number of syscalls when dropping to user space, this patch enables the synchronization of the following "registers" with kvm_run: - ARCH0: CPU timer, clock comparator, TOD programmable register, guest breaking-event register, program parameter - PFAULT: pfault parameters (token, select, compare) The registers are grouped to reduce the overhead when syncing. As this grows the number of sync registers quite a bit, let's move the code synchronizing registers with kvm_run from kvm_arch_vcpu_ioctl_run() into separate helper routines. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include/uapi/asm/kvm.h')
-rw-r--r--arch/s390/include/uapi/asm/kvm.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
index 0fc26430a1e5..48eda3ab4944 100644
--- a/arch/s390/include/uapi/asm/kvm.h
+++ b/arch/s390/include/uapi/asm/kvm.h
@@ -111,12 +111,22 @@ struct kvm_guest_debug_arch {
#define KVM_SYNC_GPRS (1UL << 1)
#define KVM_SYNC_ACRS (1UL << 2)
#define KVM_SYNC_CRS (1UL << 3)
+#define KVM_SYNC_ARCH0 (1UL << 4)
+#define KVM_SYNC_PFAULT (1UL << 5)
/* definition of registers in kvm_run */
struct kvm_sync_regs {
__u64 prefix; /* prefix register */
__u64 gprs[16]; /* general purpose registers */
__u32 acrs[16]; /* access registers */
__u64 crs[16]; /* control registers */
+ __u64 todpr; /* tod programmable register [ARCH0] */
+ __u64 cputm; /* cpu timer [ARCH0] */
+ __u64 ckc; /* clock comparator [ARCH0] */
+ __u64 pp; /* program parameter [ARCH0] */
+ __u64 gbea; /* guest breaking-event address [ARCH0] */
+ __u64 pft; /* pfault token [PFAULT] */
+ __u64 pfs; /* pfault select [PFAULT] */
+ __u64 pfc; /* pfault compare [PFAULT] */
};
#define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1)
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