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Commit 13211ea7 authored by Eric Farman's avatar Eric Farman Committed by Christian Borntraeger
Browse files

KVM: s390: Enable vector support for capable guest 



We finally have all the pieces in place, so let's include the
vector facility bit in the mask of available hardware facilities
for the guest to recognize.  Also, enable the vector functionality
in the guest control blocks, to avoid a possible vector data
exception that would otherwise occur when a vector instruction
is issued by the guest operating system.

Signed-off-by: default avatarEric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent bc17de7c

arch/s390/include/asm/kvm_host.h

+3 −1
Original line number Diff line number Diff line
@@ -172,7 +172,9 @@ struct kvm_s390_sie_block { 
	__u32	fac;			/* 0x01a0 */

	__u8	reserved1a4[20];	/* 0x01a4 */

	__u64	cbrlo;			/* 0x01b8 */

	__u8	reserved1c0[30];	/* 0x01c0 */

	__u8	reserved1c0[8];		/* 0x01c0 */

	__u32	ecd;			/* 0x01c8 */

	__u8	reserved1cc[18];	/* 0x01cc */

	__u64	pp;			/* 0x01de */

	__u8	reserved1e6[2];		/* 0x01e6 */

	__u64	itdba;			/* 0x01e8 */

arch/s390/kvm/kvm-s390.c

+5 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { 
unsigned long kvm_s390_fac_list_mask[] = {

	0xff82fffbf4fc2000UL,

	0x005c000000000000UL,

	0x4000000000000000UL,

};



unsigned long kvm_s390_fac_list_mask_size(void)
@@ -1186,6 +1187,10 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 
		vcpu->arch.sie_block->eca |= 1;

	if (sclp_has_sigpif())

		vcpu->arch.sie_block->eca |= 0x10000000U;

	if (vcpu->kvm->arch.use_vectors) {

		vcpu->arch.sie_block->eca |= 0x00020000;

		vcpu->arch.sie_block->ecd |= 0x20000000;

	}

	vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;



	if (kvm_s390_cmma_enabled(vcpu->kvm)) {