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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-10-19 16:24:28 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-11-30 12:47:05 +0100 |
| commit | 71f116bfedfdd6763f2caf842bf40a6506759029 (patch) | |
| tree | ceee587318172ad8aca0f2ea7a542a568839e6f0 /arch/s390/kvm/intercept.c | |
| parent | KVM: Remove unnecessary debugfs dentry references (diff) | |
| download | linux-71f116bfedfdd6763f2caf842bf40a6506759029.tar.xz linux-71f116bfedfdd6763f2caf842bf40a6506759029.zip | |
KVM: s390: rewrite vcpu_post_run and drop out early
Let's rewrite this function to better reflect how we actually handle
exit_code. By dropping out early we can save a few cycles. This
especially speeds up sie exits caused by host irqs.
Also, let's move the special -EOPNOTSUPP for intercepts to
the place where it belongs and convert it to -EREMOTE.
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index b4a5aa110cec..d53c10753c46 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -54,9 +54,6 @@ void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc) static int handle_noop(struct kvm_vcpu *vcpu) { switch (vcpu->arch.sie_block->icptcode) { - case 0x0: - vcpu->stat.exit_null++; - break; case 0x10: vcpu->stat.exit_external_request++; break; @@ -338,8 +335,10 @@ static int handle_partial_execution(struct kvm_vcpu *vcpu) int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) { + if (kvm_is_ucontrol(vcpu->kvm)) + return -EOPNOTSUPP; + switch (vcpu->arch.sie_block->icptcode) { - case 0x00: case 0x10: case 0x18: return handle_noop(vcpu); |