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From: Christian Borntraeger <borntraeger@de.ibm.com>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Cc: KVM <kvm@vger.kernel.org>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	Cornelia Huck <cornelia.huck@de.ibm.com>,
	Jens Freimann <jfrei@linux.vnet.ibm.com>,
	linux-s390 <linux-s390@vger.kernel.org>,
	Maxim Samoylov <max7255@linux.vnet.ibm.com>
Subject: [GIT PULL 06/12] KVM: s390: Introduce Vector Enhancements facility 1 to the guest
Date: Wed,  1 Feb 2017 12:38:08 +0100	[thread overview]
Message-ID: <1485949094-138708-7-git-send-email-borntraeger@de.ibm.com> (raw)
In-Reply-To: <1485949094-138708-1-git-send-email-borntraeger@de.ibm.com>

From: Maxim Samoylov <max7255@linux.vnet.ibm.com>

We can directly forward the vector enhancement facility 1 to the guest
if available and VX is requested by user space.

Please note that user space will have to take care of the final state
of the facility bit when migrating to older machines.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Maxim Samoylov <max7255@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 arch/s390/kvm/kvm-s390.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 4f74511..1fd4b85 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -505,6 +505,10 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
 		} else if (MACHINE_HAS_VX) {
 			set_kvm_facility(kvm->arch.model.fac_mask, 129);
 			set_kvm_facility(kvm->arch.model.fac_list, 129);
+			if (test_facility(135)) {
+				set_kvm_facility(kvm->arch.model.fac_mask, 135);
+				set_kvm_facility(kvm->arch.model.fac_list, 135);
+			}
 			r = 0;
 		} else
 			r = -EINVAL;
-- 
2.7.4

  parent reply	other threads:[~2017-02-01 11:38 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-01 11:38 [GIT PULL 00/12] KVM: s390: Fixes and features for 4.11 (via kvm/next) Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 01/12] KVM: s390: do not expose random data via facility bitmap Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 02/12] KVM: s390: gaccess: add ESOP2 handling Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 03/12] KVM: s390: instruction-execution-protection support Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 04/12] KVM: s390: get rid of bogus cc initialization Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 05/12] KVM: s390: Get rid of ar_t Christian Borntraeger
2017-02-01 11:38 ` Christian Borntraeger [this message]
2017-02-01 11:38 ` [GIT PULL 07/12] KVM: s390: Introduce BCD Vector Instructions to the guest Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 08/12] KVM: s390: guestdbg: filter i-fetch events on icpts Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 09/12] KVM: s390: prepare to read random guest instructions Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 10/12] KVM: s390: guestdbg: filter PER i-fetch on EXECUTE properly Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 11/12] KVM: s390: Fix RRBE return code not being CC Christian Borntraeger
2017-02-01 11:38 ` [GIT PULL 12/12] KVM: s390: Add debug logging to basic cpu model interface Christian Borntraeger

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