From: Claudio Imbrenda <imbrenda@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: cohuck@redhat.com, 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
Subject: [PATCH v1 06/11] KVM: s390: pv: usage counter instead of flag
Date: Mon, 17 May 2021 22:07:53 +0200 [thread overview]
Message-ID: <20210517200758.22593-7-imbrenda@linux.ibm.com> (raw)
In-Reply-To: <20210517200758.22593-1-imbrenda@linux.ibm.com>
Use the is_protected field as a counter instead of a flag. This will
be used in upcoming patches.
Increment the counter when a secure configuration is created, and
decrement it when it is destroyed. Previously the flag was set when the
set secure parameters UVC was performed.
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
arch/s390/kvm/pv.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c
index c3f9f30d2ed4..59039b8a7be7 100644
--- a/arch/s390/kvm/pv.c
+++ b/arch/s390/kvm/pv.c
@@ -218,7 +218,8 @@ int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc)
cc = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
UVC_CMD_DESTROY_SEC_CONF, rc, rrc);
WRITE_ONCE(kvm->arch.gmap->guest_handle, 0);
- atomic_set(&kvm->mm->context.is_protected, 0);
+ if (!cc)
+ atomic_dec(&kvm->mm->context.is_protected);
KVM_UV_EVENT(kvm, 3, "PROTVIRT DESTROY VM: rc %x rrc %x", *rc, *rrc);
WARN_ONCE(cc, "protvirt destroy vm failed rc %x rrc %x", *rc, *rrc);
/* Intended memory leak on "impossible" error */
@@ -259,11 +260,14 @@ int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc)
/* Outputs */
kvm->arch.pv.handle = uvcb.guest_handle;
+ atomic_inc(&kvm->mm->context.is_protected);
if (cc) {
- if (uvcb.header.rc & UVC_RC_NEED_DESTROY)
+ if (uvcb.header.rc & UVC_RC_NEED_DESTROY) {
kvm_s390_pv_deinit_vm(kvm, &dummy, &dummy);
- else
+ } else {
+ atomic_dec(&kvm->mm->context.is_protected);
kvm_s390_pv_dealloc_vm(kvm);
+ }
return -EIO;
}
kvm->arch.gmap->guest_handle = uvcb.guest_handle;
@@ -286,8 +290,6 @@ int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
*rrc = uvcb.header.rrc;
KVM_UV_EVENT(kvm, 3, "PROTVIRT VM SET PARMS: rc %x rrc %x",
*rc, *rrc);
- if (!cc)
- atomic_set(&kvm->mm->context.is_protected, 1);
return cc ? -EINVAL : 0;
}
--
2.31.1
next prev parent reply other threads:[~2021-05-17 20:08 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 20:07 [PATCH v1 00/11] KVM: s390: pv: implement lazy destroy Claudio Imbrenda
2021-05-17 20:07 ` [PATCH v1 01/11] KVM: s390: pv: leak the ASCE page when destroy fails Claudio Imbrenda
2021-05-18 10:26 ` Janosch Frank
2021-05-18 10:40 ` Claudio Imbrenda
2021-05-18 12:00 ` Janosch Frank
2021-05-17 20:07 ` [PATCH v1 02/11] KVM: s390: pv: properly handle page flags for protected guests Claudio Imbrenda
2021-05-17 20:07 ` [PATCH v1 03/11] KVM: s390: pv: handle secure storage violations " Claudio Imbrenda
2021-05-17 20:07 ` [PATCH v1 04/11] KVM: s390: pv: handle secure storage exceptions for normal guests Claudio Imbrenda
2021-05-17 20:07 ` [PATCH v1 05/11] KVM: s390: pv: refactor s390_reset_acc Claudio Imbrenda
2021-05-26 12:11 ` Janosch Frank
2021-05-17 20:07 ` Claudio Imbrenda [this message]
2021-05-27 9:29 ` [PATCH v1 06/11] KVM: s390: pv: usage counter instead of flag Janosch Frank
2021-05-17 20:07 ` [PATCH v1 07/11] KVM: s390: pv: add export before import Claudio Imbrenda
2021-05-26 11:56 ` Janosch Frank
2021-05-17 20:07 ` [PATCH v1 08/11] KVM: s390: pv: lazy destroy for reboot Claudio Imbrenda
2021-05-27 9:43 ` Janosch Frank
2021-05-17 20:07 ` [PATCH v1 09/11] KVM: s390: pv: extend lazy destroy to handle shutdown Claudio Imbrenda
2021-05-17 20:07 ` [PATCH v1 10/11] KVM: s390: pv: module parameter to fence lazy destroy Claudio Imbrenda
2021-05-27 10:35 ` Janosch Frank
2021-05-17 20:07 ` [PATCH v1 11/11] KVM: s390: pv: add support for UV feature bits Claudio Imbrenda
2021-05-18 15:05 ` [PATCH v1 00/11] KVM: s390: pv: implement lazy destroy Cornelia Huck
2021-05-18 15:36 ` Claudio Imbrenda
2021-05-18 15:45 ` Christian Borntraeger
2021-05-18 15:52 ` Cornelia Huck
2021-05-18 16:13 ` Claudio Imbrenda
2021-05-18 16:20 ` Christian Borntraeger
2021-05-18 16:34 ` Claudio Imbrenda
2021-05-18 16:35 ` Christian Borntraeger
2021-05-18 16:04 ` Cornelia Huck
2021-05-18 16:19 ` Claudio Imbrenda
2021-05-18 16:22 ` David Hildenbrand
2021-05-18 16:31 ` Claudio Imbrenda
2021-05-18 16:55 ` Christian Borntraeger
2021-05-18 17:00 ` Claudio Imbrenda
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