linux-kernel - [PATCH 16/32] KVM: s390: expose the guest zPCI interpretation facility

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Date:   Tue,  7 Dec 2021 15:57:27 -0500
From:   Matthew Rosato <mjrosato@...ux.ibm.com>
To:     linux-s390@...r.kernel.org
Cc:     alex.williamson@...hat.com, cohuck@...hat.com,
        schnelle@...ux.ibm.com, farman@...ux.ibm.com, pmorel@...ux.ibm.com,
        borntraeger@...ux.ibm.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, agordeev@...ux.ibm.com,
        frankja@...ux.ibm.com, david@...hat.com, imbrenda@...ux.ibm.com,
        vneethv@...ux.ibm.com, oberpar@...ux.ibm.com, freude@...ux.ibm.com,
        thuth@...hat.com, pasic@...ux.ibm.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 16/32] KVM: s390: expose the guest zPCI interpretation facility

This facility will be used to enable interpretive execution of zPCI
instructions.

Signed-off-by: Matthew Rosato <mjrosato@...ux.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 c8fe9b7c2395..09991d05c871 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2751,6 +2751,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 		set_kvm_facility(kvm->arch.model.fac_mask, 147);
 		set_kvm_facility(kvm->arch.model.fac_list, 147);
 	}
+	if (sclp.has_zpci_interp && test_facility(69)) {
+		set_kvm_facility(kvm->arch.model.fac_mask, 69);
+		set_kvm_facility(kvm->arch.model.fac_list, 69);
+	}
 
 	if (css_general_characteristics.aiv && test_facility(65))
 		set_kvm_facility(kvm->arch.model.fac_mask, 65);
-- 
2.27.0