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authorFan Zhang <zhangfan@linux.vnet.ibm.com>2016-08-15 05:53:22 +0300
committerChristian Borntraeger <borntraeger@de.ibm.com>2016-09-08 14:40:39 +0300
commit80cd8763388b52fa9129cbb4b57a3615a55afd40 (patch)
treeb3182213435cbe8c3a321c6ed6d8817dc5a4b251 /arch/s390/kvm/intercept.c
parentc14b88d76624e02b9895914b85b9d8b2c984563c (diff)
downloadlinux-80cd8763388b52fa9129cbb4b57a3615a55afd40.tar.xz
KVM: s390: lazy enable RI
Only enable runtime instrumentation if the guest issues an RI related instruction or if userspace changes the riccb to a valid state. This makes entry/exit a tiny bit faster. Initial patch by Christian Borntraeger Signed-off-by: Fan Zhang <zhangfan@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.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index dfd0ca2638fa..1cab8a177d0e 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -29,6 +29,7 @@ static const intercept_handler_t instruction_handlers[256] = {
[0x01] = kvm_s390_handle_01,
[0x82] = kvm_s390_handle_lpsw,
[0x83] = kvm_s390_handle_diag,
+ [0xaa] = kvm_s390_handle_aa,
[0xae] = kvm_s390_handle_sigp,
[0xb2] = kvm_s390_handle_b2,
[0xb6] = kvm_s390_handle_stctl,