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[v5,12/14] KVM: s390: pv: module parameter to fence lazy destroy

Message ID 20210920132502.36111-13-imbrenda@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series KVM: s390: pv: implement lazy destroy for reboot | expand

Commit Message

Claudio Imbrenda Sept. 20, 2021, 1:25 p.m. UTC 
Add the module parameter "lazy_destroy", to allow the lazy destroy
mechanism to be switched off. This might be useful for debugging
purposes.

The parameter is enabled by default.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
---
 arch/s390/kvm/pv.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c
index eb13382c3d36..77a972187033 100644
--- a/arch/s390/kvm/pv.c
+++ b/arch/s390/kvm/pv.c
@@ -16,6 +16,10 @@ 
 #include <linux/sched/mm.h>
 #include "kvm-s390.h"
 
+static int lazy_destroy = 1;
+module_param(lazy_destroy, int, 0444);
+MODULE_PARM_DESC(lazy_destroy, "Deferred destroy for protected guests");
+
 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc)
 {
 	int cc;