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From: Claudio Imbrenda <imbrenda@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: borntraeger@de.ibm.com, frankja@linux.ibm.com, thuth@redhat.com,
	pasic@linux.ibm.com, david@redhat.com,
	linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
	scgl@linux.ibm.com
Subject: [PATCH v7 07/17] KVM: s390: pv: module parameter to fence lazy destroy
Date: Fri,  4 Feb 2022 16:53:39 +0100	[thread overview]
Message-ID: <20220204155349.63238-8-imbrenda@linux.ibm.com> (raw)
In-Reply-To: <20220204155349.63238-1-imbrenda@linux.ibm.com>

Add the module parameter "lazy_destroy", to allow the asynchronous 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/kvm-s390.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 577f1ead6a51..1a788f45d691 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -207,6 +207,11 @@ unsigned int diag9c_forwarding_hz;
 module_param(diag9c_forwarding_hz, uint, 0644);
 MODULE_PARM_DESC(diag9c_forwarding_hz, "Maximum diag9c forwarding per second, 0 to turn off");
 
+/* allow asynchronous deinit for protected guests */
+static int lazy_destroy = 1;
+module_param(lazy_destroy, int, 0444);
+MODULE_PARM_DESC(lazy_destroy, "Asynchronous destroy for protected guests");
+
 /*
  * For now we handle at most 16 double words as this is what the s390 base
  * kernel handles and stores in the prefix page. If we ever need to go beyond
-- 
2.34.1


  parent reply	other threads:[~2022-02-04 15:54 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-04 15:53 [PATCH v7 00/17] KVM: s390: pv: implement lazy destroy for reboot Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 01/17] KVM: s390: pv: leak the topmost page table when destroy fails Claudio Imbrenda
2022-02-07  8:56   ` Janosch Frank
2022-02-07  9:02     ` Claudio Imbrenda
2022-02-07 14:33     ` Heiko Carstens
2022-02-07 14:49       ` Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 02/17] KVM: s390: pv: handle secure storage violations for protected guests Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 03/17] KVM: s390: pv: handle secure storage exceptions for normal guests Claudio Imbrenda
2022-02-04 19:51   ` kernel test robot
2022-02-04 19:51     ` kernel test robot
2022-02-07  9:40   ` Janosch Frank
2022-02-04 15:53 ` [PATCH v7 04/17] KVM: s390: pv: refactor s390_reset_acc Claudio Imbrenda
2022-02-07 10:02   ` Janosch Frank
2022-02-07 10:47     ` Claudio Imbrenda
2022-02-07 10:56       ` Janosch Frank
2022-02-07 11:01         ` Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 05/17] KVM: s390: pv: usage counter instead of flag Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 06/17] KVM: s390: pv: add export before import Claudio Imbrenda
2022-02-04 15:53 ` Claudio Imbrenda [this message]
2022-02-04 15:53 ` [PATCH v7 08/17] KVM: s390: pv: make kvm_s390_cpus_from_pv global Claudio Imbrenda
2022-02-07 10:15   ` Janosch Frank
2022-02-04 15:53 ` [PATCH v7 09/17] KVM: s390: pv: clear the state without memset Claudio Imbrenda
2022-02-07 10:09   ` Janosch Frank
2022-02-04 15:53 ` [PATCH v7 10/17] KVM: s390: pv: add mmu_notifier Claudio Imbrenda
2022-02-04 21:22   ` kernel test robot
2022-02-04 21:22     ` kernel test robot
2022-02-04 21:22   ` kernel test robot
2022-02-04 21:22     ` kernel test robot
2022-02-07 11:04   ` Janosch Frank
2022-02-07 12:16     ` Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 11/17] s390/mm: KVM: pv: when tearing down, try to destroy protected pages Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 12/17] KVM: s390: pv: refactoring of kvm_s390_pv_deinit_vm Claudio Imbrenda
2022-02-07 11:06   ` Janosch Frank
2022-02-04 15:53 ` [PATCH v7 13/17] KVM: s390: pv: cleanup leftover protected VMs if needed Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 14/17] KVM: s390: pv: asynchronous destroy for reboot Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 15/17] KVM: s390: pv: api documentation for asynchronous destroy Claudio Imbrenda
2022-02-07 14:52   ` Janosch Frank
2022-02-07 15:17     ` Claudio Imbrenda
2022-02-04 15:53 ` [PATCH v7 16/17] KVM: s390: pv: add KVM_CAP_S390_PROT_REBOOT_ASYNC Claudio Imbrenda
2022-02-07 14:37   ` Janosch Frank
2022-02-07 15:19     ` Claudio Imbrenda
2022-02-07 15:40       ` Janosch Frank
2022-02-04 15:53 ` [PATCH v7 17/17] KVM: s390: pv: avoid export before import if possible Claudio Imbrenda

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