KVM: s390: Enable vector support for capable guest (13211ea7) · Commits · 戴 / test

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:

Eric Farman <farman@linux.vnet.ibm.com> Reviewed-by:

Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by:

Christian Borntraeger <borntraeger@de.ibm.com>

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)) {

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