diff mbox

[02/10] s390x/kvm: sync fprs via kvm_run

Message ID 1456226350-3367-3-git-send-email-cornelia.huck@de.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Cornelia Huck Feb. 23, 2016, 11:19 a.m. UTC 
From: David Hildenbrand <dahi@linux.vnet.ibm.com>

We can now also sync the fprs via kvm_run, avoiding one ioctl.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 target-s390x/kvm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox

Patch

diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 9b21b96..6763656 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -342,6 +342,12 @@  int kvm_arch_put_registers(CPUState *cs, int level)
         }
         cs->kvm_run->s.regs.fpc = env->fpc;
         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS;
+    } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
+        for (i = 0; i < 16; i++) {
+            cs->kvm_run->s.regs.fprs[i] = get_freg(env, i)->ll;
+        }
+        cs->kvm_run->s.regs.fpc = env->fpc;
+        cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_FPRS;
     } else {
         /* Floating point */
         for (i = 0; i < 16; i++) {
@@ -482,6 +488,11 @@  int kvm_arch_get_registers(CPUState *cs)
             env->vregs[i][1].ll = cs->kvm_run->s.regs.vrs[i][1];
         }
         env->fpc = cs->kvm_run->s.regs.fpc;
+    } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
+        for (i = 0; i < 16; i++) {
+            get_freg(env, i)->ll = cs->kvm_run->s.regs.fprs[i];
+        }
+        env->fpc = cs->kvm_run->s.regs.fpc;
     } else {
         r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
         if (r < 0) {