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Commit 1935222d authored Aug 29, 2017 by David Hildenbrand Committed by Christian Borntraeger Aug 29, 2017

KVM: s390: we are always in czam mode



Independent of the underlying hardware, kvm will now always handle
SIGP SET ARCHITECTURE as if czam were enabled. Therefore, let's not
only forward that bit but always set it.

While at it, add a comment regarding STHYI.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170829143108.14703-1-david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

parent 1bab1c02

arch/s390/kvm/kvm-s390.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1927,6 +1927,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
		memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
		S390_ARCH_FAC_LIST_SIZE_BYTE);

		/* we are always in czam mode - even on pre z14 machines */
		set_kvm_facility(kvm->arch.model.fac_mask, 138);
		set_kvm_facility(kvm->arch.model.fac_list, 138);
		/* we emulate STHYI in kvm */
		set_kvm_facility(kvm->arch.model.fac_mask, 74);
		set_kvm_facility(kvm->arch.model.fac_list, 74);
		if (MACHINE_HAS_TLB_GUEST) {

arch/s390/tools/gen_facilities.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -80,7 +80,6 @@ static struct facility_def facility_defs[] = {
		78, /* enhanced-DAT 2 */
		130, /* instruction-execution-protection */
		131, /* enhanced-SOP 2 and side-effect */
		138, /* configuration z/architecture mode (czam) */
		139, /* multiple epoch facility */
		146, /* msa extension 8 */
		-1 /* END */